本帖最后由 dami 于 2020-7-18 22:42 编辑
赛元易码魔盒体验——2,串口命令去点灯
1，使用串口0 UART0 和P00
2，使用赛元易码魔盒生成代码。
3，使用KEIL 编译。
4，main.c主函数前添加代码
- void rx_to_buf(unsigned char x);
- #define RXMAX 50
- char rx0[RXMAX];
- char rx_point=0;
- void delayms(int x)
- {
- int i,j;
- for(i=0;i<5000;i++)
- for(j=0;j<x;j++){};
- }
- void LED1_ON(void){
- GPIO_WriteLow(GPIO0, GPIO_PIN_0);
- }
- void led1_off(void)
- {
- GPIO_WriteHigh(GPIO0, GPIO_PIN_0);
- }
- void SC_GPIO_Init(void)
- {
-
- GPIO_Init(GPIO0, GPIO_PIN_0,GPIO_MODE_OUT_PP);
- /*GPIO_Init write here*/
- }
- void rx_to_buf(unsigned char x)
- {
- if(rx_point>=RXMAX)
- return;
- rx0[rx_point]=x;
- rx_point++;
- if(rx_point>=RXMAX)
- rx_point =0;
- }
- void rx_command(void)
- {
- if((rx0[0] =='l')&&(rx0[1] =='e')&&(rx0[2] =='d')&&(rx0[3] =='o')&&(rx0[4] =='n'))
- {
- LED1_ON();
- printf("LED1 ON! \n");
- rx_point =0;
- rx0[0] =rx0[1] =rx0[2] =rx0[3] =rx0[4] =rx0[5];
- }
- if((rx0[0] =='l')&&(rx0[1] =='e')&&(rx0[2] =='d')&&(rx0[3] =='o')&&(rx0[4] =='f')&&(rx0[5] =='f'))
- {
- led1_off();
- printf("LED1 OFF! \n");
- rx_point =0;
- rx_point =0;
- rx0[0] =rx0[1] =rx0[2] =rx0[3] =rx0[4] =rx0[5];
- }
- if(rx_point >=6)
- rx_point =0;
- }
4,中断 函数中加入代码：- extern void rx_to_buf(unsigned char x);
- void UART0Interrupt() interrupt 4
- {
- if(UART0_GetFlagStatus(UART0_FLAG_TI))
- {
- UART0_ClearFlag(UART0_FLAG_TI); //Çå³ýTI
- Uart0SendFlag = 1;
- }
- else if(UART0_GetFlagStatus(UART0_FLAG_RI))
- {
- unsigned char x;
- UART0_ClearFlag(UART0_FLAG_RI); //Çå³ýRI
- Uart0ReceiveFlag=1;
- x=UART0_ReceiveData8();
- rx_to_buf(x);
- }
- }
5，主程序main中调用
- void main(void)
- {
- Uart0Init();
- SC_GPIO_Init();
- enableInterrupts();
- printf("Uart0 contrl led\n please send ledon ledoff command to control led flash");
- while(1)
- {
- rx_command();
- delayms(100);
- }
- }
7，运行结果：
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楼主
好！！！！！！！！！！！！
