编写一个简单地碰撞检测示例程序： void RF_SendProcedure_CSMA_CA(void){static const u8 random_withdraw_time_table[] = {5,22,19,14,12,20,9,10,6,11,7,13,8,23,25,17,16,21,24,18};static u8 random_withdraw_time_select = 0