BYD-BF7612CMXX-UartTimer1.zip

/************************************ * 芯片：比亚迪 BF7612CMXX * 功能： 串口模拟发送 *************************************/ //以下头文件可在比亚迪半导体官网下载 [CTK_Library] #include "BF7612CMXX.h" #include "BF7612CMXX_API_Timer.h" typedef unsigned char uchar; typedef unsigned int uint; typedef unsigned long ulong; typedef unsigned char BYTE; #define SYSCLK_SEL 0 // 系统时钟选择0-12MHz,1-6MHZ,2-4MHz #if (SYSCLK_SEL == 0) #define SYSCLK 12 // SYS-12Mhz #elif (SYSCLK_SEL == 1) #define SYSCLK 6 // SYS-6Mhz #elif (SYSCLK_SEL == 2) #define SYSCLK 4 // SYS-04Mhz #else #endif #define SYS_CLK_SET(x) \ { \ SYS_CLK_CFG &= ~(0x03); \ SYS_CLK_CFG |= (0x03 & (x << 0)); \ } //(0--12Mhz,1--06Mhz,2--04Mhz) char g_nSendInx = 0; char g_nTxdBuff = 0; char g_nTxdFlag = 0; #define MY_TXD PD3 //=====自定义TXD引脚===== #define T_UART_START TR1 = 1 #define T_UART_STOP TR1 = 0 uchar TH1_Reload = 0; uchar TL1_Reload = 0; /****************************** 自定义串口发送单字符 ******************************/ void MyUart_Send(char ch) { g_nTxdFlag = 0; g_nTxdBuff = ch; T_UART_START; // Start timer while (g_nTxdFlag == 0) ; } /****************************** 自定义串口发送字符串 ******************************/ void MyUart_String(char *str) { int i = 0; while (*(str + i)) { g_nTxdFlag = 0; g_nTxdBuff = *(str + i); i++; T_UART_START; // Start Timer while (g_nTxdFlag == 0) ; } } void Print_Num(char *str, int num) { idata char buf[15] = {0}; // max len=15 int cnt = 0; int i = 0; int temp = num; if (num < 0) temp = -num; for (i = 0; i < 15; i++) { cnt++; buf[i] = temp % 10 + '0'; temp /= 10; if (temp == 0) break; } MyUart_String(str); if (num < 0) MyUart_Send('-'); while (cnt >= 1) { MyUart_Send(buf[cnt - 1]); cnt--; } MyUart_Send('\n'); // end char } void MyTimer1_ISP(void) { g_nSendInx++; // 发送模拟第几位 if (g_nSendInx == 1) { MY_TXD = 0; // 起始位拉低 } else if (g_nSendInx == 10) // 格式: 9600-8-N-1,完整10Bit数据 { MY_TXD = 1; // 停止位拉高 T_UART_STOP; // Stop Timer g_nSendInx = 0; g_nTxdFlag = 1; /// 发送完成标志位 } else { MY_TXD = g_nTxdBuff & 0x01; // set sbuffer_data g_nTxdBuff >>= 1; } } void Timer1_Init(uint Timer1Us) { EA = 0; // 关总中断； T1_IP_SET; // 根据实际应运设置优先级 T1_INT_FLAG_CLR; // 清除Timer1中断标志 T1_CT_MODE(0); // Timer1定时/计数模式选择0为定时模式，1为计数模式 T1_MODE_SET(1); // 设置为16位计算器，tiemr1_clk=(1/12)*sys_clk TH1 = (0xFFFF - ((uint)((Timer1Us * 1.0) * ((SYSCLK * 1.0) / 12.0)))) >> 8; TL1 = (0xFFFF - ((uint)((Timer1Us * 1.0) * ((SYSCLK * 1.0) / 12.0)))); TH1_Reload = TH1; TL1_Reload = TL1; T1_IE_SET; // 开Timer1中断使能 T1_RUN; // 开启Timer1 EA = 1; // 开总中断 } // INT3 as timer1 isr fuction void Timer1_ISR() interrupt 3 { TH1 = TH1_Reload; TL1 = TL1_Reload; T1_INT_FLAG_CLR; // 清除Timer1中断标志 MyTimer1_ISP(); } void main(void) { long j = 0; int loop_cnt = 0; SYS_CLK_SET(SYSCLK_SEL); // Select sysclk as 12Mhz WDT_EN = 0X55; // Close WatchDog // PD3 as txd test TRISD = ~(1 << 3); // D_Port IOMode 0：Output; 1：input; Timer1_Init(104); // 定时器1初始化,104us=>9600bps MyUart_String("===StartTest===\n"); while (1) { for (j = 0; j < 150000; j++) ; //在12Mhz下延时1秒 Print_Num("#CNT=",loop_cnt++); } }