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在2008年开发的红酒自动售卖机上用MAX7219实现8个4位LED显示，一直稳定运行，今天由于要修改一下红酒机的代码，特此分享下MAX7219的驱动。
MAX7219.h
/*
*********************************(C) COPYRIGHT 2008 HB **************************************************
*
* File Name : sp_max7219.h
* Author : qzm
* Date First Issued : 11/28/2008 qzm
* Description : Header for spi_max7219.c file.
*
* History:
* 2009/02/19: V2.0 begin
* 待增加的功能如下:
* （1）每个4位LED可单独寻址修改
* （2）增加单个4位LED闪烁功能
* （3）增加可显示英文字符的功能
*
* 2009/01/04: V1.0
* （1）实现了4个MAX7219控制8个4位共阴极LED显示驱动，每个4位LED对应0000-9999的整数。
* （2）先调用IniFourMax7219 fun ini SPI and Max7219的工作模式，然后用
Max7219_SendFourWord FUN 发送形如 d[0] d[1] d[2] d[3] d[4] d[5] d[6] d[7]
* 1234 5678 1234 5678 1234 5678 1234 5678
* LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED8
* 在该版本中的发送函数中并没有加入延时之类的代码，运行很稳定。
*
* 2008/11/28: beta1
--------------------------------------------------------------------------------------------------------
* Version2.0 Debug Sum-up
（1）在初始化 Mcu's SPI Module 后要延迟一定的时钟周期后再发送初始化数据给MAX7219
如： Max7219_Init();
for (i=0;i<999999;i++); // Delay, 必要条件，当 i<9时，初始化出错的机率达到90%
// 当注释掉 延迟，初始化出错机率为100%
SendDataToFirstMax7219(REG_DECODE, DECODE_MODE_BCD_FOR_ALL_DIGIT); NOTE: 在之后的调试中发现，（1）中的分析是错误的，在初始化SPI后，立即发送数据是可行的，
而（1）中的错误假象是由于没在拉高（ SPI_NSS_HIGH()）之前检查数据是否发送完毕所致。KeyPoint:
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
SPI_NSS_HIGH();（2）
在发送数据之前要查看忙状态标志，QZM不会忽略
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
SPI_I2S_SendData(SPI1, temp1);
！！！！！ 在置高之前也要查看忙状态标志，QZM忽略着 ！！！！！
这会使本是要发送给第一个MAX7219却发给了第4个MAX7219，发送给第二个却发给了第三个，发给
第四个却发给了第一个。
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
SPI_NSS_HIGH();（3） 在看FWLIB2.03's example 发现很多SPI的例子用
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
而之前我一直用
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);
也工作得很好，为了比较，把基于 SPI_I2S_FLAG_BSY 改为 SPI_I2S_FLAG_TXE ，正在测试较果2009/2/23 ！！！！！ << 关于 while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET); 和 while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); 的实测比较>>用SPI_I2S_FLAG_TXE == RESET 来控制发送，在 SPI_BaudRatePrescaler_256 - SPI_BaudRatePrescaler_2 时4个MAX7219
的显示都不正常，在调节分频为SPI_BaudRatePrescaler_2时，第一个MAX7219显示正常，其他的MAX7219显示不正常，但当转其他的
SPI_BaudRatePrescaler_X，4个MAX729的显示大都不正常。代码如下所示：(不加任何延时)
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
SPI_I2S_SendData(SPI1, NULL_OP);用 while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); 来控制发送，在SPI_BaudRatePrescaler_2 时只有第一个MAX7219显示正常，其他MAX7219显示不正常
但，SPI_BaudRatePrescaler_4 - SPI_BaudRatePrescaler_256 4个MAX7219都显示正常。<< 结论 >> 用while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);而不是用SPI_I2S_FLAG_TXE == RESET，来控制MAX7219的发送更加稳定！！！！！（4）经过几天的改MAX7219底层代码和测试的心得 - 2009/2/23
1、当SPI的预分频为“SPI_BaudRatePrescaler_2”时，无论PLC板上的22R或RC滤波使能与否，都只有第一个MAX7219能正常工作，其他三个都不能因此只能用“SPI_BaudRatePrescaler_4”以上的预分频。2、while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);比while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);用于控制SPI发送数据给MAX7219稳定得多。*********************************************************************************************************
*//* Define to prevent recursive inclusion -------------------------------------*/
#ifndef MAX7219_H
#define MAX7219_H/* Includes ------------------------------------------------------------------*//* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/#define SPI_NSS_LOW() GPIO_ResetBits(GPIOA, GPIO_Pin_4) /* Select SPI FLASH: ChipSelect pin low */
#define SPI_NSS_HIGH() GPIO_SetBits(GPIOA, GPIO_Pin_4) /* Deselect SPI FLASH: ChipSelect pin high *//* Exported functions ------------------------------------------------------- *//*----- Version 1.0 use -----------------------------*/
/*----- High layer function -----*/
void IniFourMax7219(void);
void SPI_Max7219_SendFourWord(s32* pEightLedData);
/*----- Low layer function -----*//*----- Version 2.0 use -----------------------------*/
/*----- 2009-2-20 new add ------*/
void IniMax7219s(void); // 把PLC板上的4个MAX7219初始化为No decode for digits7-0;void MAX7219_CloseAllLedDisplay(void);
void MAX7219_OpenAllLedDisplay(void);void MAX7219_Send4BitNum(u8 LedIndex, u16 data); // 发送 十进制的 0000-9999; 当data >= 0xF000时，表示要显示其他编码 void MAX7219_Send4BitDark(u8 LedIndex); // 使指定LED全 DARK
void MAX7219_Send4BitLow(u8 LedIndex); // 使指定LED显示 "____"
void MAX7219_Send4BitMiddle(u8 LedIndex); // 使指定LED显示 "----"
void MAX7219_Send4BitHeight(u8 LedIndex); // 使指定LED显示 "~~~~"void MAX7219_IntensityAdjust(u8 MAX7219Index, u8 IntensityValue/* 0x00-0x0F */); // 亮度调整/*----- Low layer function -----*/
u8 MAX7219_LedBitCoding(u8 data); // 把输入字节转换为MAX7219能处理的编码void MAX7219_SendDataToFirstMax7219(u8 Reg, u8 data); // 发送数据到第一个MAX7219的指定寄存器中，可用于初始化MAX7219和数据显示
void MAX7219_SendDataToSecMax7219(u8 Reg, u8 data); // 发送数据到第二个MAX7219的指定寄存器中，可用于初始化MAX7219和数据显示
void MAX7219_SendDataToThirdMax7219(u8 Reg, u8 data); // 发送数据到第三个MAX7219的指定寄存器中，可用于初始化MAX7219和数据显示
void MAX7219_SendDataToFourMax7219(u8 Reg, u8 data); // 发送数据到第四个MAX7219的指定寄存器中，可用于初始化MAX7219和数据显示#endif /* MAX7219_H *//******************* (C) HB 2008/11/21 qzm *****END OF FILE********************************************/MAX7219.c
/*
*********************************(C) COPYRIGHT 2008 HB **************************************************
*
* File Name : sp_max7219.h
* Author : qzm
* Date First Issued : 11/28/2008 qzm
* Description : Header for spi_max7219.c file.
*
* History:
* 2009/02/19: V2.0 begin
* 待增加的功能如下:
* （1）每个4位LED可单独寻址修改
* （2）增加单个4位LED闪烁功能
* （3）增加可显示英文字符的功能
*
* 2009/01/04: V1.0
* （1）实现了4个MAX7219控制8个4位共阴极LED显示驱动，每个4位LED对应0000-9999的整数。
* （2）先调用IniFourMax7219 fun ini SPI and Max7219的工作模式，然后用
* SPI_Max7219_SendFourWord FUN 发送形如 d[0] d[1] d[2] d[3] d[4] d[5] d[6] d[7]
* 1234 5678 1234 5678 1234 5678 1234 5678
* LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED8
* 在该版本中的发送函数中并没有加入延时之类的代码，运行很稳定。
*
* 2008/11/28: beta1
--------------------------------------------------------------------------------------------------------
* Version2.0 Debug Sum-up
（1）在初始化 Mcu's SPI Module 后要延迟一定的时钟周期后再发送初始化数据给MAX7219
如： SPI_Max7219_Init();
for (i=0;i<999999;i++); // Delay, 必要条件，当 i<9时，初始化出错的机率达到90%
// 当注释掉 延迟，初始化出错机率为100%
SPI_SendDataToFirstMax7219(REG_DECODE, DECODE_MODE_BCD_FOR_ALL_DIGIT); NOTE: 在之后的调试中发现，（1）中的分析是错误的，在初始化SPI后，立即发送数据是可行的，
而（1）中的错误假象是由于没在拉高（ SPI_NSS_HIGH()）之前检查数据是否发送完毕所致。KeyPoint:
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
SPI_NSS_HIGH();（2）
在发送数据之前要查看忙状态标志，QZM不会忽略
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
SPI_I2S_SendData(SPI1, temp1);
！！！！！ 在置高之前也要查看忙状态标志，QZM忽略着 ！！！！！
这会使本是要发送给第一个MAX7219却发给了第4个MAX7219，发送给第二个却发给了第三个，发给
第四个却发给了第一个。
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
SPI_NSS_HIGH();*********************************************************************************************************
*//* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "MAX7219.h"/* Private typedef -----------------------------------------------------------*//* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
//------------------------------------------------------------------------------
// MAX7219 Register
//
#define REG_DIGIT0 0x01 /* Digit 0 */
#define REG_DIGIT1 0x02 /* Digit 1 */
#define REG_DIGIT2 0x03 /* Digit 2 */
#define REG_DIGIT3 0x04 /* Digit 3 */
#define REG_DIGIT4 0x05 /* Digit 4 */
#define REG_DIGIT5 0x06 /* Digit 5 */
#define REG_DIGIT6 0x07 /* Digit 6 */
#define REG_DIGIT7 0x08 /* Digit 7 */
#define REG_H 0x0C /* H */
#define REG_M 0x0A /* - */
#define REG_L 0x0D /* L */#define REG_DECODE 0x09 /*译码方式寄存器 */
#define REG_INTENSITY 0x0A /*亮度寄存器 */
#define REG_LIMIT 0x0B /*扫描界限寄存器 */
#define REG_SHUTDOWN 0x0C /*停机寄存器 */
#define REG_DISPTEST 0x0F /*显示测试寄存器 */
#define REG_NO_OP 0xF0 /*不进行操作寄存器 */#define DECODE_MODE_NO_DECODE 0x00
#define DECODE_MODE_BCD_FOR_DIGIT0 0x01
#define DECODE_MODE_BCD_FOR_DIGIT0_TO_DIGIT3 0x0F
#define DECODE_MODE_BCD_FOR_ALL_DIGIT 0xFF#define INTENSITY_1_32 0x00
#define INTENSITY_3_32 0x01
#define INTENSITY_5_32 0x02
#define INTENSITY_7_32 0x03
#define INTENSITY_9_32 0x04
#define INTENSITY_11_32 0x05
#define INTENSITY_13_32 0x06
#define INTENSITY_15_32 0x07
#define INTENSITY_17_32 0x08
#define INTENSITY_19_32 0x09
#define INTENSITY_21_32 0x0A
#define INTENSITY_23_32 0x0B
#define INTENSITY_25_32 0x0C
#define INTENSITY_27_32 0x0D
#define INTENSITY_29_32 0x0E
#define INTENSITY_31_32 0x0F#define SCAN_LIMIT_DIG0 0x00
#define SCAN_LIMIT_DIG01 0x01
#define SCAN_LIMIT_DIG012 0x02
#define SCAN_LIMIT_DIG0123 0x03
#define SCAN_LIMIT_DIG01234 0x04
#define SCAN_LIMIT_DIG012345 0x05
#define SCAN_LIMIT_DIG0123456 0x06
#define SCAN_LIMIT_DIG01234567 0x07#define SHUTDOWN_SHUTDOWN 0x00
#define SHUTDOWN_NORMAL 0x01#define DISPLAY_TEST_NORMAL 0x00
#define DISPLAY_TEST_TEST 0x01//----- No-Decode Mode Data Bits and Corresponding Segment Lines ------------
//--------- Standard 7-Segment LED ---------------------
// A
// ___
// F | | B
// |_G_|
// | |
// E |___| C
// D 。DP
//--------- Register data ------------------------------
#define LED_SEG_G 0x01 /* D0 */
#define LED_SEG_F 0x02 /* D1 */
#define LED_SEG_E 0x04 /* D2 */
#define LED_SEG_D 0x08 /* D3 */
#define LED_SEG_C 0x10 /* D4 */
#define LED_SEG_B 0x20 /* D5 */
#define LED_SEG_A 0x40 /* D6 */
#define LED_SEG_DP 0x80 /* D7 *///
// normal macro
//
#define NULL_OP (u16)((REG_NO_OP<<8)&0xFF00)/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
void SPI_Max7219_Init(void);
void IniFourMax7219(void);
void SPI_Max7219_SendFourWord(s32* pEightLedData);/* Private functions ---------------------------------------------------------*//*******************************************************************************
* Function Name : SPI_Max7219_Init
* Description : Initializes the peripherals used by the Max7219 driver.
* Input : None
* Output : None
* Return : None
*
*
* 2009/02/20 更改备注:
* （1）SPI_BaudRatePrescaler 之前一直设置为最保守的“SPI_BaudRatePrescaler_256”,
* 改为“SPI_BaudRatePrescaler_2”测试。
*******************************************************************************/
void SPI_Max7219_Init(void)
{SPI_InitTypeDef SPI_InitStructure;GPIO_InitTypeDef GPIO_InitStructure;/* Enable SPI1 and GPIOA clocks */RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1 | RCC_APB2Periph_GPIOA, ENABLE);/* Configure SPI1 pins: NSS, SCK, MISO and MOSI */GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_7;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;GPIO_Init(GPIOA, &GPIO_InitStructure);/* Configure PA.4 as Output push-pull, used as Flash Chip select */GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;GPIO_Init(GPIOA, &GPIO_InitStructure);/* SPI1 configuration */ SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;SPI_InitStructure.SPI_Mode = SPI_Mode_Master;SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b/*SPI_DataSize_8b*/;SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; // okSPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; // okSPI_InitStructure.SPI_NSS = SPI_NSS_Soft ;// = SPI_NSS_Hard 时 MAX7219不能工作 !!!!!SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64; /* SPI_BaudRatePrescaler_2 只有第一个MAX7219正常，其他都不正常(无论是15元的还是5元)SPI_BaudRatePrescaler_4 在接4个5元的MAX7219S，极不稳定SPI_BaudRatePrescaler_32 改为：5元的, 不太稳定，有时某个LED会灭或全8888SPI_BaudRatePrescaler_64 测试中SPI_BaudRatePrescaler_128 8个LED后面的显示有些延迟 */SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;SPI_InitStructure.SPI_CRCPolynomial = 7;SPI_Init(SPI1, &SPI_InitStructure);/* Enable SPI1 TXE interrupt *///SPI_I2S_ITConfig( SPI1, SPI_I2S_IT_TXE, ENABLE);/* Enable SPI1 */SPI_Cmd(SPI1, ENABLE); /* 由于MAX7219在NSS的上升沿处开始锁存数据，所以在初始化MAX7219时先置为高，在传送数据之前，再置为低，当传送数据完成后再置高，即锁存入MAX7219*/SPI_NSS_HIGH();
}/*******************************************************************************
* Function Name : IniFourMax7219
* Description : Initializes board Max7219
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void IniFourMax7219(void)
{int i;u8 ucs[10] = { REG_DECODE, 0xFF, // 8个Digit都使能译码 0-8REG_INTENSITY, 0x06, // 25/32REG_LIMIT, 0x07, // 只扫描0-3 DIGITREG_SHUTDOWN, 0x01, // (0)Shutdown Mode ; (1)Normal OperationREG_DISPTEST, 0x00 // (0)Normal Operation Mode ; (1)Display Test Mode};SPI_Max7219_Init();// 给4个MAX7219发送第一个初始化命令SPI_NSS_LOW();// while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[0]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[1]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[0]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[1]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[0]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[1]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[0]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[1]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);// 拉高SS，通知MAX7219将移位Register(16bit)的数据锁存起来。SPI_NSS_HIGH();//for(i=0;i<10000;i++);// 给4个MAX7219发送第二个初始化命令SPI_NSS_LOW();// while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[2]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[3]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[2]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[3]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[2]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[3]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[2]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[3]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); // 拉高SS，通知MAX7219将移位Register(16bit)的数据锁存起来。SPI_NSS_HIGH();for(i=0;i<100;i++);// 给4个MAX7219发送第三个初始化命令SPI_NSS_LOW();// while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[4]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[5]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[4]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[5]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[4]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[5]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[4]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[5]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); // 拉高SS，通知MAX7219将移位Register(16bit)的数据锁存起来。SPI_NSS_HIGH();for(i=0;i<100;i++);// 给4个MAX7219发送第四个初始化命令SPI_NSS_LOW();// while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[6]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[7]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[6]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[7]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[6]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[7]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[6]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[7]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); // 拉高SS，通知MAX7219将移位Register(16bit)的数据锁存起来。SPI_NSS_HIGH();for(i=0;i<100;i++);// 给4个MAX7219发送第五个初始化命令SPI_NSS_LOW();// while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[8]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[9]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[8]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[9]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[8]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[9]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[8]); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); SPI_I2S_SendData(SPI1,ucs[9]);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); // 拉高SS，通知MAX7219将移位Register(16bit)的数据锁存起来。SPI_NSS_HIGH();
}/*******************************************************************************
* Function Name : void IniMax7219s(void)
* Description : Initializes board Max7219
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void IniMax7219s(void)
{s32 i;SPI_Max7219_Init();for (i=0;i<999999;i++); // Ini First Max7219MAX7219_SendDataToFirstMax7219(REG_DECODE, DECODE_MODE_NO_DECODE); // Decode Mode//for (i=0;i<99999;i++);MAX7219_SendDataToFirstMax7219(REG_INTENSITY, INTENSITY_31_32); // Intensity//for (i=0;i<99999;i++);MAX7219_SendDataToFirstMax7219(REG_LIMIT, SCAN_LIMIT_DIG01234567); // Scan Limit//for (i=0;i<99999;i++);MAX7219_SendDataToFirstMax7219(REG_SHUTDOWN, SHUTDOWN_NORMAL); // Shutdown//for (i=0;i<99999;i++);MAX7219_SendDataToFirstMax7219(REG_DISPTEST, DISPLAY_TEST_NORMAL); //Display TestMAX7219_Send4BitNum(0,0);MAX7219_Send4BitNum(1,1);MAX7219_SendDataToSecMax7219(REG_DECODE, DECODE_MODE_NO_DECODE); // Decode Mode//for (i=0;i<99999;i++);MAX7219_SendDataToSecMax7219(REG_INTENSITY, INTENSITY_31_32); // Intensity//for (i=0;i<99999;i++);MAX7219_SendDataToSecMax7219(REG_LIMIT, SCAN_LIMIT_DIG01234567); // Scan Limit//for (i=0;i<99999;i++);MAX7219_SendDataToSecMax7219(REG_SHUTDOWN, SHUTDOWN_NORMAL); // Shutdown//for (i=0;i<99999;i++);MAX7219_SendDataToSecMax7219(REG_DISPTEST, DISPLAY_TEST_NORMAL); //Display TestMAX7219_Send4BitNum(2,0);MAX7219_Send4BitNum(3,1);MAX7219_SendDataToThirdMax7219(REG_DECODE, DECODE_MODE_NO_DECODE); // Decode Mode//for (i=0;i<99999;i++);MAX7219_SendDataToThirdMax7219(REG_INTENSITY, INTENSITY_31_32); // Intensity//for (i=0;i<99999;i++);MAX7219_SendDataToThirdMax7219(REG_LIMIT, SCAN_LIMIT_DIG01234567); // Scan Limit//for (i=0;i<99999;i++);MAX7219_SendDataToThirdMax7219(REG_SHUTDOWN, SHUTDOWN_NORMAL); // Shutdown//for (i=0;i<99999;i++);MAX7219_SendDataToThirdMax7219(REG_DISPTEST, DISPLAY_TEST_NORMAL); //Display TestMAX7219_SendDataToThirdMax7219(REG_DIGIT0, 1);MAX7219_Send4BitNum(4,4);MAX7219_Send4BitNum(5,5);MAX7219_SendDataToFourMax7219(REG_DECODE, DECODE_MODE_NO_DECODE); // Decode Mode//for (i=0;i<99999;i++);MAX7219_SendDataToFourMax7219(REG_INTENSITY, INTENSITY_31_32); // Intensity//for (i=0;i<99999;i++);MAX7219_SendDataToFourMax7219(REG_LIMIT, SCAN_LIMIT_DIG01234567); // Scan Limit//for (i=0;i<99999;i++);MAX7219_SendDataToFourMax7219(REG_SHUTDOWN, SHUTDOWN_NORMAL); // Shutdown//for (i=0;i<99999;i++);MAX7219_SendDataToFourMax7219(REG_DISPTEST, DISPLAY_TEST_NORMAL); //Display TestMAX7219_Send4BitNum(6,6);MAX7219_Send4BitNum(7,7);
}/*******************************************************************************
* Function Name : SPI_Max7219_SendFourWord
* Description : 发送 data TO 4个 max7219
* Input : s32* pEightLedData 指针指向一个s32数据类型的一维数组（8个成员变量，每个成员变量的位数=4）
* : 形如：s32 unitPrice1[8] = {1111,2222,3333,4444,5555,6666,7777,8888};
* : 数入指针的和 board 中的LED实际对应关系
* : EightLedData[0] <-> LED1 : EightLedData[1] <-> LED2 ... EightLedData[7] <-> LED8
* Output : None
* Return : None
*******************************************************************************/
void SPI_Max7219_SendFourWord(s32* pEightLedData)
{/* variable define -------------------------------------------*/s32 i; // 用于迭代二维数组中的第1维s32 j; // 用于迭代二维数组中的第2维s32 m; // 用于分解算法u8 leds[4][8]; // 用于SPI的发送暂存u8 digit[8]; // 用于暂存分解之后的位值s32 temp; // 用于分解算法/* Get u8 array for send ------------------------------------*/for (i=0,m=0;i<4;i++,m+=2){/* 分解整数算法 -----------------------------------------*/temp = pEightLedData[m+1]; digit[4] = temp/1000; // 得到千位temp %= 1000;digit[5] = temp/100; // 得到百位temp %= 100;digit[6] = temp/10; // 得到十位digit[7] = temp%10; // 得到个位temp = pEightLedData[m];digit[0] = temp/1000; // 得到千位temp %= 1000;digit[1] = temp/100; // 得到百位temp %= 100;digit[2] =temp/10; // 得到十位digit[3] = temp%10; // 得到个位/* 存到SPI发送用到的二维数组中 --------------------------*/for (j=0;j<8;j++){leds[i][j] = digit[j];}}/* data Send ------------------------------------------------*/for(i=7;i>=0;i--){ SPI_NSS_LOW();for(j=3;j>=0;j--){while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1,i+1 ); while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, leds[j][i]); } while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_NSS_HIGH();}
}/*******************************************************************************
* Function Name : void MAX7219_SendDataToFirstMax7219(u8 Reg, u8 data)
* Description : 发送由 寄存器地址和BYTE数据组合成的u16数据FRAME到第一个MAX7219
*
* Input : Reg-对应MAX7219的寄存器的地址；data-对应发送的数据
*
* Output : None
* Return : None
*******************************************************************************/
void MAX7219_SendDataToFirstMax7219(u8 Reg, u8 data)
{//u32 i;u16 temp1;u16 temp2;temp1 = (u16)Reg;temp2 = (u16)data;temp1<<=8;temp1 &= 0xFF00;temp2 &= 0x00FF;temp1 |= temp2;SPI_NSS_LOW();while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, NULL_OP);//for (i=0;i<999;i++);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, NULL_OP);//for (i=0;i<999;i++);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, NULL_OP);//for (i=0;i<999;i++);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, temp1);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_NSS_HIGH();
}/*******************************************************************************
* Function Name : void MAX7219_SendDataToSecMax7219(u8 Reg, u8 data)
*
* Description : 发送由 寄存器地址和BYTE数据组合成的u16数据FRAME到第一个MAX7219
*
* Input : Reg-对应MAX7219的寄存器的地址；data-对应发送的数据
*
* Output : None
* Return : None
*******************************************************************************/
void MAX7219_SendDataToSecMax7219(u8 Reg, u8 data)
{//u32 i;u16 temp1;u16 temp2;temp1 = (u16)Reg;temp2 = (u16)data;temp1<<=8;temp1 &= 0xFF00;temp2 &= 0x00FF;temp1 |= temp2;SPI_NSS_LOW();while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, NULL_OP);//for (i=0;i<999;i++);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, NULL_OP);//for (i=0;i<999;i++);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, temp1);//for (i=0;i<999;i++);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, NULL_OP);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_NSS_HIGH();
}/*******************************************************************************
* Function Name : void MAX7219_SendDataToThirdMax7219(u8 Reg, u8 data)
*
* Description : 发送由 寄存器地址和BYTE数据组合成的u16数据FRAME到第一个MAX7219
*
* Input : Reg-对应MAX7219的寄存器的地址；data-对应发送的数据
*
* Output : None
* Return : None
*******************************************************************************/
void MAX7219_SendDataToThirdMax7219(u8 Reg, u8 data)
{u16 temp1;u16 temp2;temp1 = (u16)Reg;temp2 = (u16)data;temp1<<=8;temp1 &= 0xFF00;temp2 &= 0x00FF;temp1 |= temp2;SPI_NSS_LOW();while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, NULL_OP);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, temp1);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, NULL_OP);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, NULL_OP);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_NSS_HIGH();
}/*******************************************************************************
* Function Name : void MAX7219_SendDataToFourMax7219(u8 Reg, u8 data)
*
* Description : 发送由 寄存器地址和BYTE数据组合成的u16数据FRAME到第一个MAX7219
*
* Input : Reg-对应MAX7219的寄存器的地址；data-对应发送的数据
*
* Output : None
* Return : None
*******************************************************************************/
void MAX7219_SendDataToFourMax7219(u8 Reg, u8 data)
{u16 temp1;u16 temp2;temp1 = (u16)Reg;temp2 = (u16)data;temp1<<=8;temp1 &= 0xFF00;temp2 &= 0x00FF;temp1 |= temp2;SPI_NSS_LOW();while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, temp1);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, NULL_OP);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, NULL_OP);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_I2S_SendData(SPI1, NULL_OP);while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);SPI_NSS_HIGH();
}/*
*********************************************************************************************************
* u8 MAX7219_LedBitCoding(u8 data)
*
* Description : 把输入的数据编码为MAX7219要求的LED 标准码
*
* Argument : (IN) u8 data // 0、1、2、3、4、5、6、7、8、9在LED中显示0-9
* // A-A ; B-小数点 ; D-Dark
*
*
* Returns : SM_TRUE - 定时时间到 SM_FALSE - 定时时间未到
*********************************************************************************************************
* Version 1.0
* Author: qzm
*/
u8 MAX7219_LedBitCoding(u8 data)
{u8 ret;switch ((u16)data){case 0x00:ret = LED_SEG_A|LED_SEG_B|LED_SEG_C|LED_SEG_D|LED_SEG_E|LED_SEG_F;break;case 0x01:ret = LED_SEG_B|LED_SEG_C;break;case 0x02:ret = LED_SEG_A|LED_SEG_B|LED_SEG_G|LED_SEG_E|LED_SEG_D;break;case 0x03:ret = LED_SEG_A|LED_SEG_B|LED_SEG_G|LED_SEG_C|LED_SEG_D;break;case 0x04:ret = LED_SEG_F|LED_SEG_G|LED_SEG_B|LED_SEG_C;break;case 0x05:ret = LED_SEG_A|LED_SEG_F|LED_SEG_G|LED_SEG_C|LED_SEG_D;break;case 0x06:ret = LED_SEG_A|LED_SEG_F|LED_SEG_E|LED_SEG_C|LED_SEG_D|LED_SEG_G;break;case 0x07:ret = LED_SEG_A|LED_SEG_B|LED_SEG_C;break;case 0x08:ret = LED_SEG_A|LED_SEG_B|LED_SEG_C|LED_SEG_D|LED_SEG_E|LED_SEG_F|LED_SEG_G;break;case 0x09:ret = LED_SEG_A|LED_SEG_B|LED_SEG_C|LED_SEG_D|LED_SEG_F|LED_SEG_G;break;case 0x0A:ret = LED_SEG_A|LED_SEG_F|LED_SEG_E|LED_SEG_B|LED_SEG_C|LED_SEG_G;break;case 0x0B: // 小数点ret = LED_SEG_DP;break;case 0x0C:ret = LED_SEG_A|LED_SEG_F|LED_SEG_E|LED_SEG_D;break;case 0x0D: // Darkret = 0;break;case 0x0E:ret = LED_SEG_A|LED_SEG_F|LED_SEG_E|LED_SEG_D|LED_SEG_G;break;case 0x0F:ret = LED_SEG_A|LED_SEG_F|LED_SEG_E|LED_SEG_G;break;case 0x10: // Low line _ret = LED_SEG_D;break;case 0x11: // Middle line -ret = LED_SEG_G;break;case 0x12: // Height line ~ret = LED_SEG_A;break;default:ret = 0x00;break;}return ret;
}/*
*********************************************************************************************************
* void MAX7219_SPI_Send4BitNum(u8 LedIndex, u16 data)
*
* Descript : 使 指定的4Bit LED 显示 十进制 0000 - 9999的数值 或 其他编码显示
*
* Param(s) :
* (in) u8 LedIndex - 从近RS485-1开始数 0、1、2、3、...7
* (in) u16 data - 待显示的十进制整数或其他显示编码
* (out) : none
* (return) : none
*********************************************************************************************************
* NOTE:输入的 data 只能显示 0000-9999的数字范围，当data >= 0xF000时，表示要显示其他编码
* data = 0xF000 显示: DARK
*/
void MAX7219_Send4BitNum(u8 LedIndex, u16 data)
{/* variable define ----------------------------------------------------*/u8 digit[4]; // 用于暂存分解之后的位值u16 temp; // 用于分解算法
// u8 leds; // 用于SPI的发送暂存if ( data<=9999 ) // 显示十进制数字{/* --------------------------------------------------------------------*/temp = data;digit[0] = temp/1000; // 得到千位temp %= 1000;digit[1] = temp/100; // 得到百位temp %= 100;digit[2] = temp/10; // 得到十位digit[3] = temp%10; // 得到个位switch (LedIndex){case 0: // LED0MAX7219_SendDataToFirstMax7219(REG_DIGIT0, MAX7219_LedBitCoding(digit[0]));MAX7219_SendDataToFirstMax7219(REG_DIGIT1, MAX7219_LedBitCoding(digit[1]));MAX7219_SendDataToFirstMax7219(REG_DIGIT2, MAX7219_LedBitCoding(digit[2]));MAX7219_SendDataToFirstMax7219(REG_DIGIT3, MAX7219_LedBitCoding(digit[3]));break;case 1: // LED1MAX7219_SendDataToFirstMax7219(REG_DIGIT4, MAX7219_LedBitCoding(digit[0]));MAX7219_SendDataToFirstMax7219(REG_DIGIT5, MAX7219_LedBitCoding(digit[1]));MAX7219_SendDataToFirstMax7219(REG_DIGIT6, MAX7219_LedBitCoding(digit[2]));MAX7219_SendDataToFirstMax7219(REG_DIGIT7, MAX7219_LedBitCoding(digit[3]));break;case 2: // LED2MAX7219_SendDataToSecMax7219(REG_DIGIT0, MAX7219_LedBitCoding(digit[0]));MAX7219_SendDataToSecMax7219(REG_DIGIT1, MAX7219_LedBitCoding(digit[1]));MAX7219_SendDataToSecMax7219(REG_DIGIT2, MAX7219_LedBitCoding(digit[2]));MAX7219_SendDataToSecMax7219(REG_DIGIT3, MAX7219_LedBitCoding(digit[3]));break;case 3: // LED3MAX7219_SendDataToSecMax7219(REG_DIGIT4, MAX7219_LedBitCoding(digit[0]));MAX7219_SendDataToSecMax7219(REG_DIGIT5, MAX7219_LedBitCoding(digit[1]));MAX7219_SendDataToSecMax7219(REG_DIGIT6, MAX7219_LedBitCoding(digit[2]));MAX7219_SendDataToSecMax7219(REG_DIGIT7, MAX7219_LedBitCoding(digit[3]));break;case 4: // LED4MAX7219_SendDataToThirdMax7219(REG_DIGIT0, MAX7219_LedBitCoding(digit[0]));MAX7219_SendDataToThirdMax7219(REG_DIGIT1, MAX7219_LedBitCoding(digit[1]));MAX7219_SendDataToThirdMax7219(REG_DIGIT2, MAX7219_LedBitCoding(digit[2]));MAX7219_SendDataToThirdMax7219(REG_DIGIT3, MAX7219_LedBitCoding(digit[3]));break;case 5: // LED5MAX7219_SendDataToThirdMax7219(REG_DIGIT4, MAX7219_LedBitCoding(digit[0]));MAX7219_SendDataToThirdMax7219(REG_DIGIT5, MAX7219_LedBitCoding(digit[1]));MAX7219_SendDataToThirdMax7219(REG_DIGIT6, MAX7219_LedBitCoding(digit[2]));MAX7219_SendDataToThirdMax7219(REG_DIGIT7, MAX7219_LedBitCoding(digit[3]));break;case 6: // LED6MAX7219_SendDataToFourMax7219(REG_DIGIT0, MAX7219_LedBitCoding(digit[0]));MAX7219_SendDataToFourMax7219(REG_DIGIT1, MAX7219_LedBitCoding(digit[1]));MAX7219_SendDataToFourMax7219(REG_DIGIT2, MAX7219_LedBitCoding(digit[2]));MAX7219_SendDataToFourMax7219(REG_DIGIT3, MAX7219_LedBitCoding(digit[3]));break;case 7: // LED7MAX7219_SendDataToFourMax7219(REG_DIGIT4, MAX7219_LedBitCoding(digit[0]));MAX7219_SendDataToFourMax7219(REG_DIGIT5, MAX7219_LedBitCoding(digit[1]));MAX7219_SendDataToFourMax7219(REG_DIGIT6, MAX7219_LedBitCoding(digit[2]));MAX7219_SendDataToFourMax7219(REG_DIGIT7, MAX7219_LedBitCoding(digit[3]));break;default:break;}/* switch (LedIndex) */}/* if ( (data>=0)||(data<=9999) ) // 显示十进制数字 */else if (data==0xF000) // 显示 DARK{MAX7219_Send4BitDark(LedIndex);}}/*
*********************************************************************************************************
* void MAX7219_Send4BitDark(u8 LedIndex)
*
* Descript : 使 指定的4Bit LED 全世界DARK
*
* Param(s) :
* (in) u8 LedIndex - 从近RS485-1开始数 0、1、2、3、...7
* (out) : none
* (return) : none
*********************************************************************************************************
*/
void MAX7219_Send4BitDark(u8 LedIndex)
{
#define LED_DARK 0x0Dswitch (LedIndex){case 0: // LED0MAX7219_SendDataToFirstMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToFirstMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToFirstMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToFirstMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_DARK));break;case 1: // LED1MAX7219_SendDataToFirstMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToFirstMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToFirstMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToFirstMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_DARK));break;case 2: // LED2MAX7219_SendDataToSecMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToSecMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToSecMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToSecMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_DARK));break;case 3: // LED3MAX7219_SendDataToSecMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToSecMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToSecMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToSecMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_DARK));break;case 4: // LED4MAX7219_SendDataToThirdMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToThirdMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToThirdMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToThirdMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_DARK));break;case 5: // LED5MAX7219_SendDataToThirdMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToThirdMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToThirdMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToThirdMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_DARK));break;case 6: // LED6MAX7219_SendDataToFourMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToFourMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToFourMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToFourMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_DARK));break;case 7: // LED7MAX7219_SendDataToFourMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToFourMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToFourMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_DARK));MAX7219_SendDataToFourMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_DARK));break;default:break;}
}/*
*********************************************************************************************************
* void MAX7219_Send4BitLow(u8 LedIndex)
*
* Descript : 使 指定的4Bit LED显示低 LINE
*
* Param(s) :
* (in) u8 LedIndex - 从近RS485-1开始数 0、1、2、3、...7
* (out) : none
* (return) : none
*********************************************************************************************************
*/
void MAX7219_Send4BitLow(u8 LedIndex)
{
#define LED_LOW_LINE 0x10switch (LedIndex){case 0: // LED0MAX7219_SendDataToFirstMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_LOW_LINE));break;case 1: // LED1MAX7219_SendDataToFirstMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_LOW_LINE));break;case 2: // LED2MAX7219_SendDataToSecMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_LOW_LINE));break;case 3: // LED3MAX7219_SendDataToSecMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_LOW_LINE));break;case 4: // LED4MAX7219_SendDataToThirdMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_LOW_LINE));break;case 5: // LED5MAX7219_SendDataToThirdMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_LOW_LINE));break;case 6: // LED6MAX7219_SendDataToFourMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_LOW_LINE));break;case 7: // LED7MAX7219_SendDataToFourMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_LOW_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_LOW_LINE));break;default:break;}
}/*
*********************************************************************************************************
* void MAX7219_Send4BitMiddle(u8 LedIndex)
*
* Descript : 使 指定的4Bit LED显示中 LINE
*
* Param(s) :
* (in) u8 LedIndex - 从近RS485-1开始数 0、1、2、3、...7
* (out) : none
* (return) : none
*********************************************************************************************************
*/
void MAX7219_Send4BitMiddle(u8 LedIndex)
{
#define LED_MIDDLE_LINE 0x11switch (LedIndex){case 0: // LED0MAX7219_SendDataToFirstMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_MIDDLE_LINE));break;case 1: // LED1MAX7219_SendDataToFirstMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_MIDDLE_LINE));break;case 2: // LED2MAX7219_SendDataToSecMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_MIDDLE_LINE));break;case 3: // LED3MAX7219_SendDataToSecMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_MIDDLE_LINE));break;case 4: // LED4MAX7219_SendDataToThirdMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_MIDDLE_LINE));break;case 5: // LED5MAX7219_SendDataToThirdMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_MIDDLE_LINE));break;case 6: // LED6MAX7219_SendDataToFourMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_MIDDLE_LINE));break;case 7: // LED7MAX7219_SendDataToFourMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_MIDDLE_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_MIDDLE_LINE));break;default:break;}
}/*
*********************************************************************************************************
* void MAX7219_Send4BitHeight(u8 LedIndex)
*
* Descript : 使 指定的4Bit LED显示高 LINE
*
* Param(s) :
* (in) u8 LedIndex - 从近RS485-1开始数 0、1、2、3、...7
* (out) : none
* (return) : none
*********************************************************************************************************
*/
void MAX7219_Send4BitHeight(u8 LedIndex)
{
#define LED_HEIGHT_LINE 0x12switch (LedIndex){case 0: // LED0MAX7219_SendDataToFirstMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_HEIGHT_LINE));break;case 1: // LED1MAX7219_SendDataToFirstMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToFirstMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_HEIGHT_LINE));break;case 2: // LED2MAX7219_SendDataToSecMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_HEIGHT_LINE));break;case 3: // LED3MAX7219_SendDataToSecMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToSecMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_HEIGHT_LINE));break;case 4: // LED4MAX7219_SendDataToThirdMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_HEIGHT_LINE));break;case 5: // LED5MAX7219_SendDataToThirdMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToThirdMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_HEIGHT_LINE));break;case 6: // LED6MAX7219_SendDataToFourMax7219(REG_DIGIT0, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT1, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT2, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT3, MAX7219_LedBitCoding(LED_HEIGHT_LINE));break;case 7: // LED7MAX7219_SendDataToFourMax7219(REG_DIGIT4, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT5, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT6, MAX7219_LedBitCoding(LED_HEIGHT_LINE));MAX7219_SendDataToFourMax7219(REG_DIGIT7, MAX7219_LedBitCoding(LED_HEIGHT_LINE));break;default:break;}
}/*
*********************************************************************************************************
* void MAX7219_IntensityAdjust(u8 MAX7219Index, u8 IntensityValue)
*
* Descript : 调节指定 MAX7219 的亮度
*
* Param(s) :
* (in) u8 MAX7219Index - 从近RS485-1开始数 0、1、2、3
* (in) u8 IntensityValue - 亮度代码；从0x00-0x0F,共16种亮度选择
* (out) : none
* (return) : none
*********************************************************************************************************
*/
void MAX7219_IntensityAdjust(u8 MAX7219Index, u8 IntensityValue/* 0x00-0x0F */)
{switch (MAX7219Index){case 0: // MAX7219_0MAX7219_SendDataToFirstMax7219(REG_INTENSITY, IntensityValue);break;case 1: // MAX7219_1MAX7219_SendDataToSecMax7219(REG_INTENSITY, IntensityValue);break;case 2: // MAX7219_2MAX7219_SendDataToThirdMax7219(REG_INTENSITY, IntensityValue);break;case 3: // MAX7219_3MAX7219_SendDataToFourMax7219(REG_INTENSITY, IntensityValue);break;default:break;}
}void MAX7219_CloseAllLedDisplay(void)
{MAX7219_SendDataToFirstMax7219(REG_SHUTDOWN, SHUTDOWN_SHUTDOWN); // ShutdownMAX7219_SendDataToSecMax7219(REG_SHUTDOWN, SHUTDOWN_SHUTDOWN); // ShutdownMAX7219_SendDataToThirdMax7219(REG_SHUTDOWN, SHUTDOWN_SHUTDOWN); // ShutdownMAX7219_SendDataToFourMax7219(REG_SHUTDOWN, SHUTDOWN_SHUTDOWN); // Shutdown
}void MAX7219_OpenAllLedDisplay(void)
{MAX7219_SendDataToFirstMax7219(REG_SHUTDOWN, SHUTDOWN_NORMAL); // ShutdownMAX7219_SendDataToSecMax7219(REG_SHUTDOWN, SHUTDOWN_NORMAL); // ShutdownMAX7219_SendDataToThirdMax7219(REG_SHUTDOWN, SHUTDOWN_NORMAL); // ShutdownMAX7219_SendDataToFourMax7219(REG_SHUTDOWN, SHUTDOWN_NORMAL); // Shutdown
}/*******************************************************************************
* Function Name : SPI_FLASH_ReadID
* Description : Reads FLASH identification.
* Input : None
* Output : None
* Return : FLASH identification
*******************************************************************************/
//u32 SPI_FLASH_ReadID(void)
//{
// u32 Temp = 0, Temp0 = 0, Temp1 = 0, Temp2 = 0;/* Select the FLASH: Chip Select low */
// SPI_FLASH_CS_LOW();/* Send "RDID " instruction */
/// SPI_FLASH_SendByte(0x9F);/* Read a byte from the FLASH */
//Temp0 = SPI_FLASH_SendByte(Dummy_Byte);/* Read a byte from the FLASH */
// Temp1 = SPI_FLASH_SendByte(Dummy_Byte);/* Read a byte from the FLASH */
// Temp2 = SPI_FLASH_SendByte(Dummy_Byte);/* Deselect the FLASH: Chip Select high */
// SPI_FLASH_CS_HIGH();// Temp = (Temp0 << 16) | (Temp1 << 8) | Temp2;// return Temp;
//}/*******************************************************************************
* Function Name : SPI_FLASH_StartReadSequence
* Description : Initiates a read data byte (READ) sequence from the Flash.
* This is done by driving the /CS line low to select the device,
* then the READ instruction is transmitted followed by 3 bytes
* address. This function exit and keep the /CS line low, so the
* Flash still being selected. With this technique the whole
* content of the Flash is read with a single READ instruction.
* Input : - ReadAddr : FLASH's internal address to read from.
* Output : None
* Return : None
*******************************************************************************/
// void SPI_FLASH_StartReadSequence(u32 ReadAddr)
// {
// /* Select the FLASH: Chip Select low */
// //SPI_FLASH_CS_LOW();
//
// /* Send "Read from Memory " instruction */
// //SPI_FLASH_SendByte(READ);
//
// /* Send the 24-bit address of the address to read from -----------------------*/
// /* Send ReadAddr high nibble address byte */
// SPI_FLASH_SendByte((ReadAddr & 0xFF0000) >> 16);
// /* Send ReadAddr medium nibble address byte */
// SPI_FLASH_SendByte((ReadAddr& 0xFF00) >> 8);
// /* Send ReadAddr low nibble address byte */
// SPI_FLASH_SendByte(ReadAddr & 0xFF);
// }/*******************************************************************************
* Function Name : SPI_FLASH_ReadByte
* Description : Reads a byte from the SPI Flash.
* This function must be used only if the Start_Read_Sequence
* function has been previously called.
* Input : None
* Output : None
* Return : Byte Read from the SPI Flash.
*******************************************************************************/
//u8 SPI_FLASH_ReadByte(void)
//{
// return (SPI_FLASH_SendByte(Dummy_Byte));
//}/*******************************************************************************
* Function Name : SPI_FLASH_SendByte
* Description : Sends a byte through the SPI interface and return the byte
* received from the SPI bus.
* Input : byte : byte to send.
* Output : None
* Return : The value of the received byte.
*******************************************************************************/
//u8 SPI_FLASH_SendByte(u8 byte)
//{
// /* Loop while DR register in not emplty */
// while(SPI_GetFlagStatus(SPI1, SPI_FLAG_TXE) == RESET);/* Send byte through the SPI1 peripheral */
// SPI_SendData(SPI1, byte);/* Wait to receive a byte */
// while(SPI_GetFlagStatus(SPI1, SPI_FLAG_RXNE) == RESET);/* Return the byte read from the SPI bus */
// return SPI_ReceiveData(SPI1);
//} /*******************************************************************************
* Function Name : SPI_FLASH_SendHalfWord
* Description : Sends a Half Word through the SPI interface and return the
* Half Word received from the SPI bus.
* Input : Half Word : Half Word to send.
* Output : None
* Return : The value of the received Half Word.
*******************************************************************************/
//u16 SPI_FLASH_SendHalfWord(u16 HalfWord)
//{
/* Loop while DR register in not emplty */
// while(SPI_GetFlagStatus(SPI1, SPI_FLAG_TXE) == RESET);/* Send Half Word through the SPI1 peripheral */
// SPI_SendData(SPI1, HalfWord);/* Wait to receive a Half Word */
// while(SPI_GetFlagStatus(SPI1, SPI_FLAG_RXNE) == RESET);/* Return the Half Word read from the SPI bus */
// return SPI_ReceiveData(SPI1);
//}/*******************************************************************************
* Function Name : SPI_FLASH_WriteEnable
* Description : Enables the write access to the FLASH.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
//void SPI_FLASH_WriteEnable(void)
//{
/* Select the FLASH: Chip Select low */
// SPI_FLASH_CS_LOW();/* Send "Write Enable" instruction */
// SPI_FLASH_SendByte(WREN);/* Deselect the FLASH: Chip Select high */
// SPI_FLASH_CS_HIGH();
//}/*******************************************************************************
* Function Name : SPI_FLASH_WaitForWriteEnd
* Description : Polls the status of the Write In Progress (WIP) flag in the
* FLASH's status register and loop until write opertaion
* has completed.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
//void SPI_FLASH_WaitForWriteEnd(void)
//{
// u8 FLASH_Status = 0;/* Select the FLASH: Chip Select low */
// SPI_FLASH_CS_LOW();/* Send "Read Status Register" instruction */
// SPI_FLASH_SendByte(RDSR);/* Loop as long as the memory is busy with a write cycle */
// do
// {
/* Send a dummy byte to generate the clock needed by the FLASH
and put the value of the status register in FLASH_Status variable */
// FLASH_Status = SPI_FLASH_SendByte(Dummy_Byte);// } while((FLASH_Status & WIP_Flag) == SET); /* Write in progress *//* Deselect the FLASH: Chip Select high */
// SPI_FLASH_CS_HIGH();
//} /******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/这篇关于MAX7219产品级驱动分享的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
