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本文整理了一些R8C常用的模块驱动,以帮助大家在使用这款单片机时快速上手。
1.时钟 初始化时钟 void sysclk_cfg(void) { #if SYSTEM_CLOCK==0 prc0 = 1; prc1 = 1; prc3 = 1; cm02 = 0; cm05 = 1; cm06 = 0; cm13 = 0; cm15 = 1; cm16 = 0; cm17 = 0; cm10 = 0; hra00 = 1; ocd0 = 0; ocd1 = 0; ocd2 = 1; ocd3 = 0; hra01 = 1;//Select internal 8MHz as system clock cm14 = 1; prc0 = 0; #else prc0 = 1; prc1 = 1; prc3 = 1; cm02 = 0; //等等模式不停止外设时�? cm05 = 0; //1:主时钟(外部)停�?0:使能 cm06 = 0; //0:CM16、CM17有效 cm13 = 1; //1:XIN-XOUT 0:IO cm15 = 1; //XIN-XOUT驱动能力 1:high //00无分�? cm16 = 0; cm17 = 0; cm10 = 0; //0:时钟振荡 //振荡停止检测功能无�? ocd0 = 0; ocd1 = 0; ocd2 = 0; //0:选择主时钟(外部�?1:内部时钟 cm10 = 0; //0:时钟振荡 hra01 = 1; //1:内部高�?0:内部低�? hra00 = 0; //1:内部高速使�? cm14 = 1; //1:内部低速晶振停�? prc0 = 0; #endif } 2.定时器 定时器的初始化、复位 typedef enum{ timerX=0, timerZ, timerC }TimerEnum_t; void timerx_init(void)//定时 { txmod0=0; txmod1=0; //txmr = 0x00; txck0=1; txck1=0; //tcss = 0x01; // f8 r0edg=0;//INT1选为上升�? prex = 9; tx = 99; // (1+9)*(99+1)=1ms txic = 0x04; txs = 1; } void timer_DeInit(TimerEnum_t a) { switch (a) { case timerX: txic = 0x00; txs = 0; break; case timerZ: tzic=0x00; tzs=0; default: break; } } 3.UART串口 初始化串口 typedef enum{ UART_9600 = 0, UART_14400 = 1, UART_19200 = 2, UART_28800 = 3, UART_31250 =4, UART_38400 = 5, UART_51200 = 6, }Uart_BaudRateTypdef; void UART0_Init(Uart_BaudRateTypdef bps) { #if (SYSTEM_CLOCK==0) unsigned char div=51; switch(bps) { case (UART_9600): { div=51; break; } case (UART_14400): { div=34; break; } case (UART_19200): { div=25; break; } case (UART_28800): { div=16; break; } case (UART_31250): { div=15; break; } case (UART_38400): { div=12; break; } case (UART_51200): { div=9; break; } default: div=51; break; } #else //SYS CLOCK = 20Mhz unsigned char div=130; switch(bps) { case (UART_9600): { div=130; break; } case (UART_14400): { div=87; break; } case (UART_19200): { div=65; break; } case (UART_28800): { div=43; break; } case (UART_31250): { div=40; break; } case (UART_38400): { div=32; break; } case (UART_51200): { div=24; break; } default: div=130; break; } #endif pd1_4=1;//缁旑垰褰涢弬鐟版倻鐠佸墽鐤? pd1_5=0; u0brg=div; smd0_u0mr=1; smd1_u0mr=0; smd2_u0mr=1; ckdir_u0mr=0; stps_u0mr=0; prye_u0mr=0; pry_u0mr=0; /****u0c0*******/ clk0_u0c0=0; clk1_u0c0=0;//f1 nch_u0c0=0; ckpol_u0c0=0; uform_u0c0=0;//0:LSB first.1:MSB first /******UCON*****/ u0irs=0; u0rrm=1; cntrsel=1; /********INT Priority**********/ s0tic=0x04; s0ric=0x05; /*****u0c1,Enable Tx,Rx**********/ te_u0c1=1; re_u0c1=1; } 4.自定义打印函数 #include "stdlib.h"//必须包含 #include void UARTSendNStr(unsigned int num,unsigned char *data) { unsigned char *st=data; unsigned int ptr=0; te_u0c1=1; while(ptr++ u0tb=*st; while(!ti_u0c1); st++; } } int Println(char *format, ...) { va_list aptr; int ret; char *buffer=(char *)malloc(sizeof(char)*100);//看实际情况,不需要这么大的可以适当减少。 if(buffer == NULL) { //错误处理 } va_start(aptr, format); ret = vsprintf(buffer, format, aptr); va_end(aptr); UARTSendNStr(ret,buffer); free(buffer); return(ret); } 5.看门狗 void init_wdt(void) { wdc = 0x9f; //128鍒嗛锛? cspr = 0; //璁℃暟婧愪繚鎶ゆā寮忔棤鏁? prc1=1; pm12 = 1; //鐪嬮棬鐙楀浣? prc1=0; wdtr = 0; //鐪嬮棬鐙楀垵濮嬪寲 wdtr = 0xff; wdts = 0; //喂狗 // watchdog 262ms } 6.短延时 void delay_1ms(unsigned int delay_time) { unsigned int i; while(delay_time !=0) { for (i =380; i!=0; i--) { asm("NOP"); asm("NOP"); } delay_time--; } } 7.进入停止模式 void enter_stop(void) { //uint8_t i; pm12 = 0; // watchdog由复位切换至中断 int0en = 0; //1:enable 0:disable ir_int0ic = 0;//清中断 DI(); kien = 0x55; // kupic = 0x06;//中断等级 fmr01 = 0; //CPU改写无效 prc0 = 1; //允许对CM0,CM1,OCD,HRA0,HRA1,HRA2寄存器写 EI(); cm10 = 1; // stop all clocks(stop mode) asm("NOP"); asm("NOP"); asm("NOP"); asm("NOP"); asm("NOP"); asm("NOP"); DI(); sysclk_cfg(); //WDT_Clear(); pm12 = 1; // watchdog由中断切换至复位 //Int0_Init(); //Int1_Init(); kupic=0; EI(); } |
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