写好了
串口发送字符串改变LED闪烁延时
包含去掉数字前面的“data=”,只取数字

视频地址:http://player.youku.com/player.php/sid/XODI1ODkzMjI0/v.swf
#include "stm32f10x.h" #include "stm32_eval.h" GPIO_InitTypeDef GPIO_InitStructure; //定义GPIO结构体 NVIC_InitTypeDef NVIC_InitStructure; USART_InitTypeDef USART_InitStructure; USART_ClockInitTypeDef USART_ClockInitStructure; #define buff_size 16; char rx_buff[],rx_buff_count=0; /*延时函数 微秒*/ void delay_us(u32 n) { u8 j; while(n--) for(j=0;j<10;j++); } /*延时函数 毫秒*/ void delay_ms(u32 n) { while(n--) delay_us(1000); } void RCC_Configuration(void) { RCC_DeInit(); RCC_HSICmd(ENABLE); while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET); RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI); RCC_HSEConfig(RCC_HSE_OFF); RCC_LSEConfig(RCC_LSE_OFF); RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_9); // 72HMz RCC_PLLCmd(ENABLE); while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); RCC_ADCCLKConfig(RCC_PCLK2_Div4); RCC_PCLK2Config(RCC_HCLK_Div1); RCC_PCLK1Config(RCC_HCLK_Div2); RCC_HCLKConfig(RCC_SYSCLK_Div1); RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); while(RCC_GetSYSCLKSource() != 0x08); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOD, &GPIO_InitStructure); GPIO_ResetBits(GPIOD,GPIO_Pin_2); //关闭蜂鸣器 } void USART_SendStr(char *str) //发送字符串函数 { while((*str)!='\0') //发送完直至最后 {USART_SendData(USART1,*str++); while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET); } } void USART_int(long BaudRate) //USART配置 { RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);//打开PA、USART1 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA^9是接TX_D1 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //片内外设功能 GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PA^10是接RX_D1 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入 GPIO_Init(GPIOA, &GPIO_InitStructure); USART_InitStructure.USART_BaudRate = BaudRate;//传输速度 USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长8bit USART_InitStructure.USART_StopBits = USART_StopBits_1; //停止位1 USART_InitStructure.USART_Parity = USART_Parity_No;//???? USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //控制流none USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //接收和发送模式 USART_ClockInitStructure.USART_Clock = USART_Clock_Disable; USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low; USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge; USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable; USART_ClockInit(USART1, &USART_ClockInitStructure); //初始化USART1时钟 USART_Init(USART1, &USART_InitStructure); //初始化USART1 USART_Cmd(USART1, ENABLE); USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); USART_Cmd(USART1, ENABLE); NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4); //选择4位优先级 NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //选择USART1中断通道 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 15; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); //初始化中断 } void GPIO_INIT() { RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); //RCC_APB2Periph_GPIOC 开启GPIOX的时钟 ENABLE\DISABLE 打开or关闭 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;//引脚:使用使用PC^0-7 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度:配置晶振 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //模式:Out_PP推挽输出,可做输出,输入 GPIO_Init(GPIOC, &GPIO_InitStructure); } unsigned int my_atoi(char* pstr) //此函数:取字符串中的数字 { int s = 0; while(*pstr != '\0') //如果没扫到字符串的最后不停止 { if(*pstr >= '0' && *pstr <= '9') //如果字符串中存在0-9的数字 { s = s * 10 + *pstr - '0'; } pstr++; } return s; } void LED(char *S,char LEN) //(字符串,字符串长度) { int m,i; int a[8]={GPIO_Pin_0,GPIO_Pin_1,GPIO_Pin_2,GPIO_Pin_3,GPIO_Pin_4,GPIO_Pin_5,GPIO_Pin_6,GPIO_Pin_7}; //将各个端口放进数组,以简化混循环 //循环点亮D0-D7小灯 m=my_atoi(S); GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7); //输出高电平 先关掉PC^0-7 delay_ms(100); for(i=0;i<=8;i++) { GPIO_ResetBits(GPIOC,a[i]); //输出低电平 点亮LED delay_ms(m); GPIO_SetBits(GPIOC,a[i]); //输出高电平 熄灭LED delay_ms(m); } } void input_ASK() { char j; LED(rx_buff,rx_buff_count); rx_buff_count=0; for (j=0;j"); } int main() { RCC_Configuration(); GPIO_INIT(); USART_int(9600); USART_SendStr("Please input like: data=\r\n"); USART_SendStr("\n>"); while(1){ } } void USART1_IRQHandler(void) { while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET) { } if(USART_ReceiveData(USART1)==0x0d) //如果接收到回车,结束输入 {input_ASK();} else { USART_SendData(USART1,USART_ReceiveData(USART1)); rx_buff[rx_buff_count]= USART_ReceiveData(USART1); rx_buff_count++; } USART_ClearFlag(USART1, USART_FLAG_RXNE); }