usartwordlength9b usart wordlength 9b
stm32中的串口通信中的USART
USART_InitStructure.USART_BaudRate = 9600;USART_InitStructure.USART_WordLength = USART_WordLength_9b;USART_InitStructure.USART_StopBits = USART_StopBits_1;USART_InitStructure.USART_Parity = USART_Parity_No;USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;USART_InitStructure.USART_Clock = USART_Clock_Disable;USART_InitStructure.USART_CPOL = USART_CPOL_Low;USART_InitStructure.USART_CPHA = USART_CPHA_2Edge;USART_InitStructure.USART_LastBit = USART_LastBit_Disable;/* Configure USART1 */USART_Init(USART1, &USART_InitStructure);/* Enable the USART1 */USART_Cmd(USART1, ENABLE);/* Set the USART1 Address */USART_SetAddress(USART1, 0x1);请问上面一句是否就是设置USART1的第9位，就是地址码如果我要把地址位置0，是否就是USART_SetAddress(USART1, 0x0);
求大神帮忙注释一下这段stm32 usart语句
1. 波特率1152002. 8位有效字长3. 1位停止位4. 无奇偶校验位5.无硬件数据流控制6.可收可发模式7.初始化出串口1cmd：使能出串口1fputc：由于printf执行是调用fputc函数，所以相当于重新定义printf函数，支持printf（)发送数据。
...刚接触stm32,懂的不多,在坐串口通讯时,gpio,rcc,usart都配置好...
我是用函数库实现的。
基本系统时钟，复用时钟，串口时钟都给了，一般不会出错。
下面是我的main（)函数int main(void){RCC_Configuration();GPIO_Configuration();USART1_Configuration(); NVIC_Configuration();/*********字符串输出**********/USART_SendData(USART1,"a");while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET){};USART_SendData(USART1,"\r");while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET){};USART_SendData(USART1,"\n");while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET){};USART_SendData(USART1,"z");while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET){};for(i=0;TxBuf1[i]!="\0"; i++){USART_SendData(USART1,TxBuf1[i]);while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET){};}}只是简单的发送字符。
接收数据的话，库函数里用的是RxData = USART_ReceiveData(USART2)；就可以实现了有什么不懂的还可以再问我。
设置中断向量void NVIC_Configuration(void){NVIC_InitTypeDef NVIC_InitStructure;/* Configure the NVIC Preemption Priority Bits */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);/* Enable the USART1 Interrupt */NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;NVIC_Init(&NVIC_InitStructure);}在中断处理函数里收数据就可以
怎么看一个数据的wordlength和fractionlength
#include #include #define MAX 1000#define LEN 20void Input (char *a, char *b, char *c){ printf (＂Input sentence:＂); gets(a); printf (＂the word to be replaced:＂);gets(b); printf (＂the new word:＂);gets(c);}void Swap (char *str, char *FindWord, char *SwapWord){ int j,s,k,i=0,SwapWordLength,strLength,FindWordLength,n; char *p1,*p2; p1=str; p2=FindWord; strLength=strlen(str); //length of the original sentence FindWordLength=strlen(FindWord); //length of the old word SwapWordLength=strlen(SwapWord); //length of the new word n=SwapWordLength-FindWordLength; while(*p1!="\0"){ if((*p1==*p2)&&(!isalpha(*(p1-1)))) //isalpha : judge whether the char_c is an english word or not,if yes return !0,if no return 0 while((*p1==*p2)&&(*p2!="\0")) { p1++; p2++; i++; } //i: record how many chars has been read else { p1++; i++; } if((*p2=="\0")&&(isalpha(*p1)==0)){ //find the old word in the sentence if(n
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