STM32F103基于USART中断收发数据.zip

#include "valuepack.h" unsigned char bits[] = {0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; const unsigned int VALUEPACK_INDEX_RANGE=VALUEPACK_BUFFER_SIZE<<3; const unsigned short TXPACK_BYTE_SIZE = ((TX_BOOL_NUM+7)>>3)+TX_BYTE_NUM+(TX_SHORT_NUM<<1)+(TX_INT_NUM<<2)+(TX_FLOAT_NUM<<2); const unsigned short RXPACK_BYTE_SIZE = ((RX_BOOL_NUM+7)>>3)+RX_BYTE_NUM+(RX_SHORT_NUM<<1)+(RX_INT_NUM<<2)+(RX_FLOAT_NUM<<2); unsigned short rx_pack_length = RXPACK_BYTE_SIZE+3; long rxIndex=0; long rdIndex=0; unsigned char vp_rxbuff[VALUEPACK_BUFFER_SIZE]; unsigned char vp_txbuff[TXPACK_BYTE_SIZE+3]; void initValuePack(int baudrate) { USART_InitTypeDef USART_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; // 时钟初始化 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_AFIO,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); // 引脚初始化 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); /* PA10 USART1_Rx */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); // 串口初始化 USART_InitStructure.USART_BaudRate = baudrate; USART_InitStructure.USART_WordLength = USART_WordLength_8b; 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_Init(USART1, &USART_InitStructure); USART_ClearITPendingBit(USART1,USART_IT_RXNE); USART_ITConfig(USART1,USART_IT_RXNE,ENABLE); NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); USART_Cmd(USART1, ENABLE); } unsigned short rdi,rdii,idl,idi; uint32_t idc; unsigned int err=0; unsigned char sum=0; unsigned char isok; unsigned short vp_circle_rx_index; void USART1_IRQHandler(void) { if(USART_GetITStatus(USART1, USART_IT_RXNE)) { vp_rxbuff[vp_circle_rx_index] = USART1->DR; vp_circle_rx_index++; if(vp_circle_rx_index>=VALUEPACK_BUFFER_SIZE) vp_circle_rx_index=0; rxIndex++; } USART_ClearITPendingBit(USART1,USART_IT_RXNE); } ///////////////////////////////////////////////////////////////////////////////////////////////////////////// // //procValuePack 用来处理手机传来的数据，并发送数据包 // unsigned char readValuePack(RxPack *rx_pack_ptr) { isok = 0; while(rdIndex<(rxIndex-((rx_pack_length)))) rdIndex+=rx_pack_length; while(rdIndex<=(rxIndex-rx_pack_length)) { rdi = rdIndex % VALUEPACK_BUFFER_SIZE; rdii=rdi+1; if( vp_rxbuff[rdi]==PACK_HEAD) { if(vp_rxbuff[(rdi+RXPACK_BYTE_SIZE+2)%VALUEPACK_BUFFER_SIZE]==PACK_TAIL) { // 计算校验和 sum=0; for(short s=0;s<RXPACK_BYTE_SIZE;s++) { rdi++; if(rdi>=VALUEPACK_BUFFER_SIZE) rdi -= VALUEPACK_BUFFER_SIZE; sum += vp_rxbuff[rdi]; } rdi++; if(rdi>=VALUEPACK_BUFFER_SIZE) rdi -= VALUEPACK_BUFFER_SIZE; if(sum==vp_rxbuff[rdi]) { // 提取数据包数据 一共有五步， bool byte short int float // 1. bool #if RX_BOOL_NUM>0 idc = (uint32_t)rx_pack_ptr->bools; idl = (RX_BOOL_NUM+7)>>3; for(idi=0;idi<idl;idi++) { if(rdii>=VALUEPACK_BUFFER_SIZE) rdii -= VALUEPACK_BUFFER_SIZE; (*((unsigned char *)idc))= vp_rxbuff[rdii]; rdii++; idc++; } #endif // 2.byte #if RX_BYTE_NUM>0 idc = (uint32_t)(rx_pack_ptr->bytes); idl = RX_BYTE_NUM; for(idi=0;idi<idl;idi++) { if(rdii>=VALUEPACK_BUFFER_SIZE) rdii -= VALUEPACK_BUFFER_SIZE; (*((unsigned char *)idc))= vp_rxbuff[rdii]; rdii++; idc++; } #endif // 3.short #if RX_SHORT_NUM>0 idc = (uint32_t)(rx_pack_ptr->shorts); idl = RX_SHORT_NUM<<1; for(idi=0;idi<idl;idi++) { if(rdii>=VALUEPACK_BUFFER_SIZE) rdii -= VALUEPACK_BUFFER_SIZE; (*((unsigned char *)idc))= vp_rxbuff[rdii]; rdii++; idc++; } #endif // 4.int #if RX_INT_NUM>0 idc = (uint32_t)(&(rx_pack_ptr->integers[0])); idl = RX_INT_NUM<<2; for(idi=0;idi<idl;idi++) { if(rdii>=VALUEPACK_BUFFER_SIZE) rdii -= VALUEPACK_BUFFER_SIZE; (*((unsigned char *)idc))= vp_rxbuff[rdii]; rdii++; idc++; } #endif // 5.float #if RX_FLOAT_NUM>0 idc = (uint32_t)(&(rx_pack_ptr->floats[0])); idl = RX_FLOAT_NUM<<2; for(idi=0;idi<idl;idi++) { if(rdii>=VALUEPACK_BUFFER_SIZE) rdii -= VALUEPACK_BUFFER_SIZE; (*((unsigned char *)idc))= vp_rxbuff[rdii]; rdii++; idc++; } #endif err = rdii; rdIndex+=rx_pack_length; isok = 1; }else { rdIndex++; err++; } }else { rdIndex++; err++; } }else { rdIndex++; err++; } } return isok; } void sendBuffer(unsigned char *p,unsigned short length) { for(int i=0;i<length;i++) { USART_SendData(USART1, *p++); while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET) {} } } unsigned short loop; unsigned char valuepack_tx_bit_index; unsigned char valuepack_tx_index; void sendValuePack(TxPack *tx_pack_ptr) { int i; vp_txbuff[0]=0xa5; sum=0; // 由于结构体中不同类型的变量在内存空间的排布不是严格对齐的，中间嵌有无效字节，因此需要特殊处理 valuepack_tx_bit_index = 0; valuepack_tx_index = 1; #if TX_BOOL_NUM>0 for(loop=0;loop<TX_BOOL_NUM;loop++) { if(tx_pack_ptr->bools[loop]) vp_txbuff[valuepack_tx_index] |= 0x01<<valuepack_tx_bit_index; else vp_txbuff[valuepack_tx_index] &= ~(0x01<<valuepack_tx_bit_index); valuepack_tx_bit_index++; if(valuepack_tx_bit_index>=8) { valuepack_tx_bit_index = 0; valuepack_tx_index++; } } if(valuepack_tx_bit_index!=0) valuepack_tx_index++; #endif #if TX_BYTE_NUM>0 for(loop=0;loop<TX_BYTE_NUM;loop++) { vp_txbuff[valuepack_tx_index] = tx_pack_ptr->bytes[loop]; valuepack_tx_index++; } #endif #if TX_SHORT_NUM>0 for(loop=0;loop<TX_SHORT_NUM;loop++) { vp_txbuff[valuepack_tx_index] = tx_pack_ptr->shorts[loop]&0xff; vp_txbuff[valuepack_tx_index+1] = tx_pack_ptr->shorts[loop]>>8; valuepack_tx_index+=2; } #endif #if TX_INT_NUM>0 for(loop=0;loop<TX_INT_NUM;loop++) { i = tx_pack_ptr->integers[loop]; vp_txbuff[valuepack_tx_index] = i&0xff; vp_txbuff[valuepack_tx_index+1] = (i>>8)&0xff; vp_txbuff[valuepack_tx_index+2] =(i>>16)&0xff; vp_txbuff[valuepack_tx_index+3] = (i>>24)&0xff; valuepack_tx_index+=4; } #endif #if TX_FLOAT_NUM>0 for(loop=0;loop<TX_FLOAT_NUM;loop++) { i = *(int *)(&(tx_pack_ptr->floats[loop])); vp_txbuff[valuepack_tx_index] = i&0xff; vp_txbuff[valuepack_tx_index+1] = (i>>8)&0xff; vp_txbuff[valuepack_tx_index+2] =(i>>16)&0xff; vp_txbuff[valuepack_tx_index+3] = (i>>24)&0xff; v