本文主要是介绍（备份）常用ASCII 8*8 点阵 以及查询显示字符的点阵，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
图片
#include "driver/spi_master.h"
#include "driver/gpio.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "string.h"
#include "driver/i2c.h"
#include "esp_rom_sys.h"
#include "sdkconfig.h"
#include <stdio.h>
#include "esp_system.h"
#include "esp_log.h"//------------------------------------------
#define I2C_MASTER_SCL_IO 14
#define I2C_MASTER_SDA_IO 26
#define I2C_MASTER_NUM I2C_NUM_0
#define I2C_MASTER_FREQ_HZ 100000
#define I2C_MASTER_TX_BUF_DISABLE 0
#define I2C_MASTER_RX_BUF_DISABLE 0
#define DS3231_ADDRESS 0x68 // 68
//--------------------------------------
#define PIN_NUM_MOSI 2
#define PIN_NUM_CLK 15
#define PIN_NUM_CS 5
#define PIN_NUM_DC 19
#define PIN_NUM_RST 18//--------------------------------------------------------------------------void i2c_master_init()
{i2c_config_t conf = {.mode = I2C_MODE_MASTER,.sda_io_num = I2C_MASTER_SDA_IO,.sda_pullup_en = GPIO_PULLUP_ENABLE,.scl_io_num = I2C_MASTER_SCL_IO,.scl_pullup_en = GPIO_PULLUP_ENABLE,.master.clk_speed = I2C_MASTER_FREQ_HZ,};ESP_ERROR_CHECK(i2c_param_config(I2C_MASTER_NUM, &conf));ESP_ERROR_CHECK(i2c_driver_install(I2C_MASTER_NUM, conf.mode, 0, 0, 0));
}uint8_t dec_to_bcd(uint8_t val)
{return ((val / 10 * 16) + (val % 10));
}uint8_t bcd_to_dec(uint8_t val)
{return ((val / 16 * 10) + (val % 16));
}esp_err_t ds3231_set_time(uint8_t sec, uint8_t min, uint8_t hour, uint8_t day, uint8_t date, uint8_t month, uint8_t year)
{uint8_t time_data[7] = {dec_to_bcd(sec), dec_to_bcd(min), dec_to_bcd(hour), dec_to_bcd(day), dec_to_bcd(date), dec_to_bcd(month), dec_to_bcd(year)};i2c_cmd_handle_t cmd = i2c_cmd_link_create();i2c_master_start(cmd);i2c_master_write_byte(cmd, (DS3231_ADDRESS << 1) | I2C_MASTER_WRITE, true);i2c_master_write_byte(cmd, 0x00, true);i2c_master_write(cmd, time_data, sizeof(time_data), true);i2c_master_stop(cmd);esp_err_t ret = i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_PERIOD_MS);i2c_cmd_link_delete(cmd);return ret;
}//---------------------------------------------------------------------------------
//-----------------------------------------------------------
spi_device_handle_t spi;void spi_init() {spi_bus_config_t buscfg = {.mosi_io_num = PIN_NUM_MOSI,.miso_io_num = -1,.sclk_io_num = PIN_NUM_CLK,.quadwp_io_num = -1,.quadhd_io_num = -1,.max_transfer_sz = 4096,};spi_bus_initialize(HSPI_HOST, &buscfg, 1);spi_device_interface_config_t devcfg = {.clock_speed_hz = 25 * 1000 * 1000, // 10 MHz.mode = 0, // SPI mode 0.spics_io_num = PIN_NUM_CS, // CS pin.queue_size = 7,};spi_bus_add_device(HSPI_HOST, &devcfg, &spi);
}void st7735_send_cmd(uint8_t cmd) {gpio_set_level(PIN_NUM_DC, 0); // Command modespi_transaction_t t;memset(&t, 0, sizeof(t));t.length = 8;t.tx_buffer = &cmd;spi_device_transmit(spi, &t);
}void st7735_send_data(uint8_t data) {gpio_set_level(PIN_NUM_DC, 1); // Data modespi_transaction_t t;memset(&t, 0, sizeof(t));t.length = 8;t.tx_buffer = &data;spi_device_transmit(spi, &t);
}void st7735_reset() {gpio_set_level(PIN_NUM_RST, 0);vTaskDelay(1 / portTICK_PERIOD_MS);gpio_set_level(PIN_NUM_RST, 1);vTaskDelay(200 / portTICK_PERIOD_MS);
}void st7735_init() {// Reset the displayst7735_reset();// Initialization commands for ST7735Sst7735_send_cmd(0x01); // Software resetvTaskDelay(150 / portTICK_PERIOD_MS);st7735_send_cmd(0x11); // Sleep outvTaskDelay(120 / portTICK_PERIOD_MS);st7735_send_cmd(0xB1);st7735_send_data(0x01);st7735_send_data(0x2c);st7735_send_data(0x2D);st7735_send_cmd(0xB2);st7735_send_data(0x01);st7735_send_data(0x2c);st7735_send_data(0x2D);st7735_send_cmd(0xB3);st7735_send_data(0x01);st7735_send_data(0x2c);st7735_send_data(0x2D);st7735_send_data(0x01);st7735_send_data(0x2c);st7735_send_data(0x2D);st7735_send_cmd(0xB4);st7735_send_data(0x00);st7735_send_cmd(0xc0);st7735_send_data(0xa2);st7735_send_data(0x02);st7735_send_data(0x84);st7735_send_cmd(0xc1);st7735_send_data(0xc5);st7735_send_cmd(0xc2);st7735_send_data(0x0d);st7735_send_cmd(0xc3);st7735_send_data(0x8d);st7735_send_data(0x2a);st7735_send_cmd(0xc4);st7735_send_data(0x8d);st7735_send_data(0xee);st7735_send_cmd(0xc5);st7735_send_data(0x0e);st7735_send_cmd(0x36);st7735_send_data(0b01000000); //40st7735_send_cmd(0xe0);st7735_send_data(0x0f);st7735_send_data(0x1a);st7735_send_data(0x0f);st7735_send_data(0x18);st7735_send_data(0x2f);st7735_send_data(0x28);st7735_send_data(0x20);st7735_send_data(0x22);st7735_send_data(0x1f);st7735_send_data(0x1b);st7735_send_data(0x23);st7735_send_data(0x37);st7735_send_data(0x00);st7735_send_data(0x07);st7735_send_data(0x02);st7735_send_data(0x10);st7735_send_cmd(0xe1);st7735_send_data(0x0f);st7735_send_data(0x1b);st7735_send_data(0x0f);st7735_send_data(0x17);st7735_send_data(0x33);st7735_send_data(0x2c);st7735_send_data(0x29);st7735_send_data(0x2e);st7735_send_data(0x30);st7735_send_data(0x30);st7735_send_data(0x39);st7735_send_data(0x3f);st7735_send_data(0x00);st7735_send_data(0x07);st7735_send_data(0x03);st7735_send_data(0x10);st7735_send_cmd(0x2a);st7735_send_data(0x00);st7735_send_data(0x00);st7735_send_data(0x00);st7735_send_data(127);st7735_send_cmd(0x2b);st7735_send_data(0x00);st7735_send_data(0x00);st7735_send_data(0x00);st7735_send_data(160);st7735_send_cmd(0xf0);st7735_send_data(0x01);st7735_send_cmd(0xf6);st7735_send_data(0x00);st7735_send_cmd(0x3a);st7735_send_data(0x05);st7735_send_cmd(0x29); // Display onvTaskDelay(100 / portTICK_PERIOD_MS);
}void qp(uint8_t xs, uint8_t xe,uint8_t ys,uint8_t ye) {// Set 列st7735_send_cmd(0x2A);st7735_send_data(0x00);st7735_send_data(xs);st7735_send_data(0x00);st7735_send_data(xe);// Set 行st7735_send_cmd(0x2B);st7735_send_data(0x00);st7735_send_data(ys);st7735_send_data(0x00);st7735_send_data(ye);// Write memoryst7735_send_cmd(0x2C);
}void cls(){qp(0,127,0,159); // lcd 全屏刷成白屏for (uint16_t a = 0; a < 159; a++) {for(uint8_t b=0;b<127;b++){st7735_send_data(0xff);st7735_send_data(0xff);}} } uint8_t font[][8] ={ {0x1C, 0x22, 0x26, 0x2A, 0x32, 0x22, 0x1C, 0x00}, // '0'{0x04, 0x0C, 0x04, 0x04, 0x04, 0x04, 0x0E, 0x00}, // 数字 '1'{0x0E, 0x11, 0x01, 0x06, 0x08, 0x10, 0x1F, 0x00 }, // 2 {0x1C, 0x22, 0x02, 0x1C, 0x02, 0x22, 0x1C, 0x00}, // '3'{0x08, 0x18, 0x28, 0x48, 0x7E, 0x08, 0x08, 0x00}, // '4'{0x3E, 0x20, 0x3E, 0x02, 0x02, 0x22, 0x1C, 0x00}, // '5'{0x1C, 0x22, 0x20, 0x3C, 0x22, 0x22, 0x1C, 0x00}, // '6'{0x3E, 0x02, 0x04, 0x08, 0x10, 0x20, 0x20, 0x00}, // '7'{0x1C, 0x22, 0x22, 0x1C, 0x22, 0x22, 0x1C, 0x00}, // '8'{0x1C, 0x22, 0x22, 0x1E, 0x02, 0x22, 0x1C, 0x00}, // '9'{0x00, 0x18, 0x18, 0x00, 0x00, 0x18, 0x18, 0x00}, // ：{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}, //空格//--------------{0x00,0x00,0x00,0xff,0x00,0x00,0x00,0x00}, //中间短横线-{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff}, //下横线_{ 0x00,0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x30}, //逗号{ 0x3C, 0x42, 0x02, 0x0C, 0x10, 0x10, 0x00,0x10},//问号{ 0x10, 0x10, 0x10, 0x10, 0x10,0x00,0x10, 0x00},//感叹号{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18,0x18},//句号{ 0x00, 0x00, 0x18, 0x18, 0x00, 0x18, 0x18, 0x30},// 分号//-------------------{0x00,0x00, 0x3C, 0x02, 0x3E, 0x42, 0x3E, 0x00 }, //a{ 0x40, 0x40, 0x7C, 0x42, 0x42, 0x42, 0x7C, 0x00},// {0x00, 0x00, 0x3E, 0x40, 0x40, 0x40, 0x3E, 0x00},// {0x02, 0x02, 0x3E, 0x42, 0x42, 0x42, 0x3E, 0x00},// {0x00, 0x00, 0x3C, 0x42, 0x7E, 0x40, 0x3C, 0x00},// {0x1C, 0x22, 0x20, 0x7C, 0x20, 0x20, 0x20, 0x00},// {0x00, 0x00, 0x3E, 0x42, 0x3E, 0x02, 0x3C, 0x00},// {0x40, 0x40, 0x7C, 0x42, 0x42, 0x42, 0x42, 0x00},// {0x00, 0x10, 0x00, 0x30, 0x10, 0x10,0x10, 0x00},// {0x00, 0x08, 0x00, 0x08, 0x08, 0x48, 0x30, 0x00},// {0x40, 0x44, 0x48,0x70, 0x48, 0x44, 0x42, 0x00}, {0x30, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00},// {0x00, 0x00, 0x66, 0x5A, 0x42, 0x42, 0x42, 0x00},// { 0x00,0x00, 0x7C, 0x42, 0x42, 0x42, 0x42, 0x00},// {0x00, 0x00, 0x3C, 0x42, 0x42, 0x42, 0x3C, 0x00},// {0x00, 0x00, 0x7C, 0x42, 0x42, 0x7C, 0x40, 0x40},// * {0x00, 0x00, 0x3E, 0x42, 0x42, 0x3E, 0x02, 0x02},// * {0x00, 0x00, 0x7C, 0x42, 0x40, 0x40, 0x40, 0x00},// {0x00, 0x00, 0x3C, 0x40, 0x3C,0x02, 0x7C, 0x00},// {0x00, 0x10,0x7C, 0x10, 0x10, 0x12, 0x0C, 0x00},// {0x00, 0x00, 0x42, 0x42, 0x42, 0x42, 0x3E, 0x00},// { 0x00, 0x00,0x42, 0x42, 0x24, 0x24, 0x18, 0x00},// {0x00, 0x00, 0x42, 0x42, 0x5A, 0x5A, 0x24, 0x00},// {0x00, 0x00, 0x42, 0x24, 0x18, 0x24, 0x42, 0x00},// {0x00, 0x00, 0x42, 0x42, 0x3E, 0x02, 0x3C, 0x00},// {0x00, 0x00, 0x7E, 0x04, 0x18, 0x20, 0x7E, 0x00},// z
};char asc[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,':',0x20,'-','_',',','?','!','.',';','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z', };void xs(uint8_t ls,uint8_t le,uint8_t hs,uint8_t he,uint8_t *ci,uint8_t ys){qp(127-le,127-ls,hs,he);for (uint16_t a = 0; a < 8; a++) {for(uint8_t b=0;b<8;b++){if((int)(((ci[a]>>b)&0b00000001))==1){ //如果像素点为1st7735_send_data(ys);st7735_send_data(0x00);}else{st7735_send_data(0xff);st7735_send_data(0xff); }}}}void hxs(uint8_t lc,uint8_t hc,char *i,size_t cd,uint8_t ys){ //在一行中显示字符uint16_t len=(int)cd;for(uint8_t a=0;a<len;a++){uint8_t ls=lc;uint8_t le=ls+7;uint8_t hs=hc; uint8_t he=hs+7; int asc_len=(int)sizeof(asc);for(int n=0;n<asc_len;n++){if(memcmp(&i[a],&asc[n],1)==0){ //查表xs(ls,le,hs,he,&font[n][0],ys);lc=le; //列自动加7，相当于光标后移一个字符break;}} } }
//========================================================================================================= void app_main() {i2c_master_init();gpio_set_direction(PIN_NUM_DC, GPIO_MODE_OUTPUT);gpio_set_direction(PIN_NUM_RST, GPIO_MODE_OUTPUT);spi_init();st7735_init(); //lcd 初始化后是花屏cls();uint8_t data[7]; // 0-255 无符号数组char i[8]; //字符串数组for(;;){// uint8_t i[]={6,1,8,3,7,3,6,7,8,7,1,7}; i2c_cmd_handle_t cmd = i2c_cmd_link_create();i2c_master_start(cmd);i2c_master_write_byte(cmd, (DS3231_ADDRESS << 1) | I2C_MASTER_WRITE, true);i2c_master_write_byte(cmd, 0x00, true);i2c_master_start(cmd);i2c_master_write_byte(cmd, (DS3231_ADDRESS << 1) | I2C_MASTER_READ, true);i2c_master_read(cmd,data, sizeof(data), I2C_MASTER_LAST_NACK);i2c_master_stop(cmd);esp_err_t ret = i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_PERIOD_MS);i2c_cmd_link_delete(cmd);if (ret == ESP_OK) {uint8_t so=data[2]; //时uint8_t soh=(so>>4)&0b00001111;i[0]=soh+0x30; //转为ascii 字符uint8_t sol=so&0b00001111;i[1]=sol+0x30; //转为ascii 字符i[2]=':';uint8_t fo=data[1]; //分uint8_t foh=(fo>>4)&0b00001111;i[3]=foh+0x30;uint8_t fol=fo&0b00001111;i[4]=fol+0x30;i[5]=':';uint8_t mo=data[0]; //秒uint8_t moh=(mo>>4)&0b00001111;i[6]=moh+0x30;uint8_t mol=mo&0b00001111;i[7]=mol+0x30;hxs(65,2,i,sizeof(i),0xf8);char i2[]="1;42,5:7_8.？！7a bcde";hxs(0,50,i2,sizeof(i2),0xf8);vTaskDelay(pdMS_TO_TICKS(100));}}
}
这篇关于（备份）常用ASCII 8*8 点阵 以及查询显示字符的点阵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！
