199 lines
4.2 KiB
C
199 lines
4.2 KiB
C
/*
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* user.c
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*
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* Created on: 2023年1月29日
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* Author: wyf
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*/
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#include "user.h"
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#include "user_lib.h"
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uint8_t usart_count = 0; //串口接收数据个数
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uint8_t RxBuff[BUFF_LEN] = {0}; //串口接收缓冲区
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uint8_t TXBuff[BUFF_LEN] = {0}; //串口发送缓冲区
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uint8_t uBuff[BUFF_LEN] = {0}; //用户缓冲区
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uint16_t positive_time = 1000; //正电场持续时间
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uint16_t negative_time = 1000; //负电场持续时间
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uint16_t RS485ADDR = 1; //485地址
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void Usart_Receive(void)
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{
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if( (uint16_t)uBuff[0] == RS485ADDR && usart_count == 8)
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{
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switch(uBuff[1]) //第二个字节，功能码
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{
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case 0x03: //读取传感器数据
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MODBUS_03H();
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break;
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case 0x06: //修改modbus从机地址，默认为1
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MODBUS_06H();
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break;
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default:break;
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}
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}
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//处理广播命令
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else if( (uint16_t)uBuff[0] == 0 && usart_count== 8)
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{
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switch(uBuff[1]) //第二个字节，功能码
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{
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case 0x06: //修改modbus从机地址，默认为1
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MODBUS_06H();
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break;
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default:break;
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}
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}
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usart_count = 0; // 清零，下次再次进入
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}
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//读取传感器数值
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void MODBUS_03H(void)
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{
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}
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void MODBUS_06H(void)
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{
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uint8_t i;
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int16_t data = BEBufToUint16( (uint8_t*)(&uBuff[4])); //要修改的数据
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uint16_t reg = BEBufToUint16( (uint8_t*)(&uBuff[2])); //寄存器地址
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uint16_t crc = CRC16_Modbus( (uint8_t*)(&uBuff[0]),6); //计算CRC
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for( i = 0; i<6; i++)
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{
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TXBuff[i] = uBuff[i];
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}
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TXBuff[6] = crc>>8;
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TXBuff[7] = crc&0x00FF;
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//修改地址
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if(reg == 0x000f && TXBuff[6]== uBuff[6] && TXBuff[7]== uBuff[7]) //比较寄存器值和CRC校验值
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{
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if(data>=1 && data<= 247) //从机地址要大于等于1，小于等于247
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{
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RS485ADDR = data; //更新地址
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__set_PRIMASK(1); /* 关中断 */
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if(write_flash() == 0)
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{
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if(uBuff[0] != 0)
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{
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send_ack(8);
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}
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}
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__set_PRIMASK(0); /* 开中断 */
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}
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else //地址超出范围时的返回值
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{
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TXBuff[4] = 0xFF;
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TXBuff[5] = 0xFF;
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crc = CRC16_Modbus( (uint8_t*)(&uBuff[0]),6); //计算CRC
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TXBuff[6] = crc>>8;
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TXBuff[7] = crc&0x00FF;
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if(uBuff[0] != 0) //广播地址不返回
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{
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send_ack(8);
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}
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}
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}
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//设置正电场持续时间
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else if(reg == 0x0004 && TXBuff[6]== uBuff[6] && TXBuff[7]== uBuff[7])
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{
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if(data>=500)
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{
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positive_time = data; //更新地址
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__set_PRIMASK(1); /* 关中断 */
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if(write_flash() == 0)
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{
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send_ack(8);
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}
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__set_PRIMASK(0); /* 开中断 */
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}
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}
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//设置负电场持续时间
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else if(reg == 0x0005 && TXBuff[6]== uBuff[6] && TXBuff[7]== uBuff[7])
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{
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if(data>=500) //数据大于1小于3300
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{
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negative_time = data;
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__set_PRIMASK(1); /* 关中断 */
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if(write_flash() == 0)
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{
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send_ack(8);
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}
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__set_PRIMASK(0); /* 开中断 */
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}
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}
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memset(uBuff, 0, sizeof(uBuff)); // 清空
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}
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void send_ack(uint8_t a)
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{
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HAL_GPIO_WritePin(TX485_PN_GPIO_Port, TX485_PN_Pin, GPIO_PIN_SET);//使能485芯片发送
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HAL_UART_Transmit_DMA(&huart1, TXBuff, a);
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while(HAL_DMA_GetState(&hdma_usart1_tx) != HAL_DMA_STATE_READY);
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HAL_GPIO_WritePin(TX485_PN_GPIO_Port, TX485_PN_Pin, GPIO_PIN_RESET);//使能485芯片接收
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}
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uint8_t write_flash(void)
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{
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FLASH_EraseInitTypeDef EraseInitType;
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uint32_t PageError;
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uint8_t a[8] = {0};
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//stm32f030F4P6: flash 16k,1k一页，共16页
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EraseInitType.TypeErase = FLASH_TYPEERASE_PAGES; //页擦书
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EraseInitType.PageAddress = FLASH485_ADDR; //擦除页地址
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EraseInitType.NbPages = 1; //擦除数量
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HAL_FLASH_Unlock(); //解锁
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if(HAL_FLASHEx_Erase(&EraseInitType, &PageError) != HAL_OK) //擦除
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{
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return 1;
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}
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a[0] = RS485ADDR&0xFF; //地址
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a[1] = RS485ADDR>>8;
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a[2] = positive_time&0xFF; //占空比
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a[3] = positive_time>>8;
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a[4] = negative_time&0xFF; //数据修正的比例系数
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a[5] = negative_time>>8;
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uint64_t *b = (uint64_t*)a;
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if(HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD, FLASH485_ADDR, *b) != HAL_OK)
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{
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return 3 ;
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}
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HAL_FLASH_Lock();
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return 0;
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}
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