| | |
|---|
| | | } |
|---|
| | | |
|---|
| | | } |
|---|
| | | void UsartParseDataHandler_1(uint8_t data) |
|---|
| | | { |
|---|
| | | static UsartRecvPackState usart_receive_state = UsartReceiveWaitHead0; |
|---|
| | | uint16_t checksum = 0; |
|---|
| | | static uint8_t pack_datalen = 0,pack_length = 0,pack_index = 0,pack_msgtype = 0,pack_cmd = CMD_READ,pack_num=0; |
|---|
| | | static uint8_t index = 0; |
|---|
| | | if(usart_receive_state == UsartReceiveWaitChecksum) |
|---|
| | | { //若收到校验和包 |
|---|
| | | checksum = 0; |
|---|
| | | for(int i = 0; i<pack_length-5; i++) { |
|---|
| | | checksum += mUsart2ReceivePack[i]; |
|---|
| | | } |
|---|
| | | checksum += pack_cmd; |
|---|
| | | checksum += pack_length; |
|---|
| | | checksum += pack_index; |
|---|
| | | checksum += pack_datalen; |
|---|
| | | checksum += pack_msgtype; |
|---|
| | | if(((data + checksum)&0xff) == 0xFF) //校验通过 |
|---|
| | | { |
|---|
| | | switch(pack_cmd) |
|---|
| | | { |
|---|
| | | case CMD_WRITE: |
|---|
| | | if(pack_index==MODBUS_MODE*2) |
|---|
| | | { |
|---|
| | | // Uart1GpsRecDebugSend(); |
|---|
| | | g_com_map[MODBUS_MODE] = 1; |
|---|
| | | return; |
|---|
| | | } |
|---|
| | | //从mUsartReceivePack中读取pack_length长度的字节，放到全局变量中,赋值保存的参数并且存入flash |
|---|
| | | memcpy((uint8_t*)&g_com_map + pack_index, mUsart2ReceivePack, pack_datalen); |
|---|
| | | if(mUsart2ReceivePack[0]==1) |
|---|
| | | UpdateProcess(pack_index); |
|---|
| | | //返回一个error状态 |
|---|
| | | //SendComMap(pack_datalen,pack_index); |
|---|
| | | save_com_map_to_flash(); |
|---|
| | | //delay_ms(100); |
|---|
| | | NVIC_SystemReset(); |
|---|
| | | break; |
|---|
| | | case CMD_READ: |
|---|
| | | //read包中data字节，即mUsartReceivePack[0]表示数据长度； |
|---|
| | | //从g_com_data结构体中的第index位置读取长度为mUsartReceivePack[0]的字节，发送出来 |
|---|
| | | SendComMap(pack_datalen,pack_index>>1); |
|---|
| | | break; |
|---|
| | | default: |
|---|
| | | break; |
|---|
| | | } |
|---|
| | | } |
|---|
| | | usart_receive_state = UsartReceiveWaitHead0; |
|---|
| | | pack_index = 0; |
|---|
| | | pack_length = 0; |
|---|
| | | index=0; |
|---|
| | | } else if((usart_receive_state == UsartReceiveWaitData) ) { //若果收到的是正常通讯包 |
|---|
| | | mUsart2ReceivePack[index] = data; |
|---|
| | | index++; |
|---|
| | | if(index == pack_length-5) { //如果收到的index与长度相等 |
|---|
| | | usart_receive_state = UsartReceiveWaitChecksum; |
|---|
| | | } |
|---|
| | | } else if(usart_receive_state == UsartReceiveWaitDataLen) { //收到指令类型字节 |
|---|
| | | pack_datalen = data; |
|---|
| | | usart_receive_state = UsartReceiveWaitData; |
|---|
| | | } else if(usart_receive_state == UsartReceiveWaitIndex) { //收到指令类型字节 |
|---|
| | | pack_index = data; |
|---|
| | | usart_receive_state = UsartReceiveWaitDataLen; |
|---|
| | | } else if(usart_receive_state == UsartReceiveWaitCMD) { //收到指令类型字节 |
|---|
| | | pack_cmd = data; |
|---|
| | | usart_receive_state = UsartReceiveWaitIndex; |
|---|
| | | } else if(usart_receive_state == UsartReceiveWaitLength) { //收到长度字节 |
|---|
| | | |
|---|
| | | pack_length = data; |
|---|
| | | pack_index = 0; |
|---|
| | | usart_receive_state = UsartReceiveWaitCMD; |
|---|
| | | |
|---|
| | | } else if((usart_receive_state == UsartReceiveWaitHead0) && (data == 0x55)) { //收到第一个包头 |
|---|
| | | usart_receive_state = UsartReceiveWaitHead1; |
|---|
| | | } else if((usart_receive_state == UsartReceiveWaitHead1) && (data == 0xAA)) { //收到第二个包头 |
|---|
| | | usart_receive_state = UsartReceiveWaitMsgType; |
|---|
| | | } else if ((usart_receive_state == UsartReceiveWaitMsgType) && (data == 0x3)) { |
|---|
| | | usart_receive_state = UsartReceiveWaitLength; |
|---|
| | | pack_msgtype = data; |
|---|
| | | } |
|---|
| | | else { |
|---|
| | | usart_receive_state = UsartReceiveWaitHead0; |
|---|
| | | pack_index = 0; |
|---|
| | | pack_length = 0; |
|---|
| | | } |
|---|
| | | } |
|---|
