STM32CUBEMX_DMA serial port idle interrupt reception + receive and send buffer

STM32CUBEMX_DMA serial port idle interrupt reception + receive and send buffer

Foreword:
The ways I know about serial port receiving instructions are: Insert picture description here

1. Receive data interrupt + specific frame end
2. Receive data interrupt + idle interrupt
3. DMA reception + idle interrupt
I recommend the third option the most, especially when the amount of data is relatively large and frequent.

Serial port configuration

my_it.c

#include "my_it.h"
#include "mymain.h"
#include "main.h"
#include "gpio.h"
#include "tim.h"
#include "usart.h"
#include "uart_lcd.h"


void MY_UART_IDLECallback(UART_HandleTypeDef *huart)//Customized serial port timeout interrupt callback function
{<!-- -->
HAL_UART_DMAStop( & amp;huart3); //Pause DMA
unsigned char data_length = BUFFER_SIZE - __HAL_DMA_GET_COUNTER( & amp;hdma_usart3_rx); //Calculate the data length of this frame
if(data_length == RBUFF_UNIT)
{<!-- -->
unsigned char recv_data[10] = {<!-- -->0};
memcpy(recv_data,receive_buff,RBUFF_UNIT);
RxDataBufCheck(recv_data,RBUFF_UNIT);
}
//HAL_UART_Transmit_DMA( & amp;huart3,receive_buff,data_length); //Loopback test, what is received is returned
HAL_UART_Receive_DMA( & amp;huart3, (unsigned char*)receive_buff, BUFFER_SIZE); //Continue to enable reception
data_length = 0;
}

void MY_UART_IRQHandler(UART_HandleTypeDef *huart)//This function call is executed in void USART3_IRQHandler(void)
{<!-- -->
if(USART3 == huart->Instance)
{<!-- -->
if(RESET != __HAL_UART_GET_FLAG( & amp;huart3, UART_FLAG_IDLE)) //Determine whether it is an idle interrupt
{<!-- -->
__HAL_UART_CLEAR_IDLEFLAG( & amp;huart3); //Clear idle interrupt
MY_UART_IDLECallback(huart); //Idle interrupt processing function
}
}
}

my_it.h

#ifndef __MY_IT_H
#define __MY_IT_H
#include "log.h"
#include "usart.h"

extern DMA_HandleTypeDef hdma_usart3_rx;

void MY_UART_IRQHandler(UART_HandleTypeDef *huart);
void MY_UART_IDLECallback(UART_HandleTypeDef *huart);

#endif

uart_lcd.c

#include "uart_lcd.h"
#include "sensor.h"
#include "dev_control.h"
#include <stdint.h>

unsigned char UART_RxDataBuf[R_NUM][RBUFF_UNIT]; //Receive buffer
unsigned char *UART_RxDataInPtr;
unsigned char *UART_RxDataOutPtr;
unsigned char *UART_RxDataEndPtr;

unsigned char UART_TxDataBuf[T_NUM][TBUFF_UNIT]; //Send buffer
unsigned char *UART_TxDataInPtr;
unsigned char *UART_TxDataOutPtr;
unsigned char *UART_TxDataEndPtr;

unsigned char receive_buff[BUFFER_SIZE]; //Temporary buffer for serial port reception


//Send data instance
#include "uart_lcd.h"
#include "sensor.h"
#include "dev_control.h"
#include <stdint.h>

unsigned char UART_RxDataBuf[R_NUM][RBUFF_UNIT]; //Receive buffer
unsigned char *UART_RxDataInPtr;
unsigned char *UART_RxDataOutPtr;
unsigned char *UART_RxDataEndPtr;

unsigned char UART_TxDataBuf[T_NUM][TBUFF_UNIT]; //Send buffer
unsigned char *UART_TxDataInPtr;
unsigned char *UART_TxDataOutPtr;
unsigned char *UART_TxDataEndPtr;

unsigned char receive_buff[BUFFER_SIZE]; //Temporary buffer for serial port reception


//Send data instance
unsigned char lcd_send_data[] = {<!-- -->0xFF,0x55,0x00,0x04,0x00,0x00,0x00,0x00,0xC1,0xBB};

//conversion between big and small ends
unsigned short swapEndian16(unsigned short value)
{<!-- -->
    return ((value & amp; 0xFF00) >> 8) | ((value & amp; 0x00FF) << 8);
}

unsigned int swapEndian32(unsigned int value)
{<!-- -->
return ((value & amp; 0xFF000000) >> 24) |
((value & amp; 0x00FF0000) >> 8) |
((value & amp; 0x0000FF00) << 8) |
((value & amp; 0x000000FF) << 24);
}

/* Table of CRC values for high order byte */
const uint8_t crctablehi[] = {<!-- -->
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,
    0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
    0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01,
    0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81,
    0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01,
    0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,
    0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
    0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01,
    0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,
    0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01,
    0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,
    0x40
};
/* Table of CRC values for low order byte */
const uint8_t crctablelo[] = {<!-- -->
    0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4,
    0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
    0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD,
    0x1D, 0x1C, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
    0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36, 0xF6, 0xF7,
    0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
    0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE,
    0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
    0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2,
    0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
    0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB,
    0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
    0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50, 0x90, 0x91,
    0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
    0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88,
    0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
    0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80,
    0x40
};

unsigned short crc16Modbus(unsigned char *ptr, unsigned short len)
{<!-- -->
unsigned char crchi = 0xff;
unsigned char crclo = 0xff;
unsigned short index;
while(len--)
{<!-- -->
index = crclo ^ *ptr + + ;
crclo = crchi ^ crctablehi[index];
crchi = crctablelo[index];
}
return (crchi | crclo << 8);//(crchi << 8 | crclo) swap high and low bytes
//return (crchi << 8 | crclo);
}

void uartLcdInit(void)
{<!-- -->
UART_RxDataInPtr = UART_RxDataBuf[0];
UART_RxDataOutPtr = UART_RxDataInPtr;
UART_RxDataEndPtr = UART_RxDataBuf[R_NUM-1];

UART_TxDataInPtr = UART_TxDataBuf[0];
UART_TxDataOutPtr = UART_TxDataInPtr;
UART_TxDataEndPtr = UART_TxDataBuf[T_NUM-1];

__HAL_UART_ENABLE_IT( & amp;huart3, UART_IT_IDLE);//Enable idle interrupt
HAL_UART_Receive_DMA( & amp;huart3, (unsigned char*)receive_buff, BUFFER_SIZE);//Start DMA to receive serial port data
}

void uartLcdTask(void)//Call once every 50ms to process cached data regularly
{<!-- -->
if(UART_RxDataOutPtr != UART_RxDataInPtr)//If it is established, it means there is data in the buffer
{<!-- -->
//Parse and process data
unsigned char recv_data[RBUFF_UNIT] = {<!-- -->0};
memcpy(recv_data,UART_RxDataOutPtr,RBUFF_UNIT);
RxDataBufAnalyze(recv_data);

UART_RxDataOutPtr + = RBUFF_UNIT; //Pointer moves down
if(UART_RxDataOutPtr == UART_RxDataEndPtr) //The pointer moves to the end of the buffer
{<!-- -->
UART_RxDataOutPtr = UART_RxDataBuf[0]; //The pointer is assigned to the beginning of the buffer
}
}
if(UART_TxDataOutPtr != UART_TxDataInPtr)//If is true, it means there is data in the sending buffer
{<!-- -->
UARTLCD_debug("TxData:%x,%x,%x,%x,%x,%x,%x,%x,%x,%x\r\\
",
UART_TxDataOutPtr[0],UART_TxDataOutPtr[1],UART_TxDataOutPtr[2],UART_TxDataOutPtr[3],UART_TxDataOutPtr[4],
UART_TxDataOutPtr[5],UART_TxDataOutPtr[6],UART_TxDataOutPtr[7],UART_TxDataOutPtr[8],UART_TxDataOutPtr[9]);
HAL_UART_Transmit_DMA( & amp;huart3,UART_TxDataOutPtr,TBUFF_UNIT); //Send data
\t\t
UART_TxDataOutPtr + = TBUFF_UNIT; //Move the pointer down
if(UART_TxDataOutPtr == UART_TxDataEndPtr) //The pointer moves to the end of the buffer
{<!-- -->
UART_TxDataOutPtr = UART_TxDataBuf[0]; //The pointer is assigned to the beginning of the buffer
}
}
}

void uartLcdMainUpdate(unsigned int num) //Call where data needs to be sent to the serial port screen
{<!-- -->
TxDataBufSend(UARTLCD_COMMAND_INIT_CHECK,num);
}

void TxDataBufAdd(unsigned char *data)
{<!-- -->
memcpy(UART_TxDataInPtr,data,TBUFF_UNIT); //Copy data to the send buffer
UART_TxDataInPtr + = TBUFF_UNIT; //Move the pointer down
if(UART_TxDataInPtr == UART_TxDataOutPtr)
{<!-- -->
UARTLCD_error("UART_TxDataBuf exceed !!!\r\\
"); //Error message when cache is full
}
if(UART_TxDataInPtr == UART_TxDataEndPtr) //The pointer moves to the end of the buffer
{<!-- -->
UART_TxDataInPtr = UART_TxDataBuf[0]; //The pointer is assigned to the beginning of the buffer
}
}

void RxDataBufAdd(unsigned char *data)
{<!-- -->
memcpy(UART_RxDataInPtr,data,RBUFF_UNIT); //Copy data to the receive buffer
UART_RxDataInPtr + = RBUFF_UNIT; //Pointer moves down
if(UART_RxDataInPtr == UART_RxDataOutPtr) //Error message when cache is full
{<!-- -->
UARTLCD_error("UART_RxDataBuf exceed !!!\r\\
");
}
if(UART_RxDataInPtr == UART_RxDataEndPtr) //The pointer moves to the end of the buffer
{<!-- -->
UART_RxDataInPtr = UART_RxDataBuf[0]; //The pointer is assigned to the beginning of the buffer
}
// for(int i = 0;i<10;i + + )
// {<!-- -->
// for(int j = 0;j<10;j + + )
// {<!-- -->
// Debug_printf("%x,",UART_RxDataBuf[i][j]);
// }
// Debug_printf("\r\\
");
// }
// Debug_printf("\r\\
");
}


void TxDataBufPack(unsigned char command,unsigned int num) //Send serial port data packet
{<!-- -->
uartLcdDataFrame_t * send_data = (uartLcdDataFrame_t *)lcd_send_data;
\t
send_data->bodyData.commandData = command;
send_data->bodyData.controlData = swapEndian32(num);
\t
unsigned char bodyData[RBUFF_UNIT-2] = {<!-- -->0};
memcpy(bodyData, & amp;send_data->bodyData,RBUFF_UNIT-2);
unsigned short send_crc = crc16Modbus(bodyData,RBUFF_UNIT-2);
\t
send_data->crcData = send_crc;
\t
TxDataBufAdd((unsigned char *)send_data);
}

void TxDataBufSend(unsigned char command,unsigned int num) //Send data directly without caching
{<!-- -->
uartLcdDataFrame_t * send_data = (uartLcdDataFrame_t *)lcd_send_data;
\t
send_data->bodyData.commandData = command;
send_data->bodyData.controlData = swapEndian32(num);
\t
unsigned char bodyData[RBUFF_UNIT-2] = {<!-- -->0};
memcpy(bodyData, & amp;send_data->bodyData,RBUFF_UNIT-2);
unsigned short send_crc = crc16Modbus(bodyData,RBUFF_UNIT-2);
\t
send_data->crcData = send_crc;
\t
unsigned char send_data_[TBUFF_UNIT] = {<!-- -->0};
memcpy(send_data_,send_data,TBUFF_UNIT);
UARTLCD_debug("TxDataBufSend:%x,%x,%x,%x,%x,%x,%x,%x,%x,%x\r\\
",
send_data_[0],send_data_[1],send_data_[2],send_data_[3],send_data_[4],
send_data_[5],send_data_[6],send_data_[7],send_data_[8],send_data_[9]);
\t
HAL_UART_Transmit_DMA( & amp;huart3,(unsigned char *)lcd_send_data,TBUFF_UNIT);
HAL_Delay(2);
}

void RxDataBufCheck(unsigned char *data,unsigned char length) //Verify whether the received serial port data is a frame of data
{<!-- -->
if(length != RBUFF_UNIT) return;
uartLcdDataFrame_t * recv_data = (uartLcdDataFrame_t *)data;

if(recv_data->bodyData.headData == 0x55FF)//Verification header
{<!-- -->
unsigned char bodyData[RBUFF_UNIT-2] = {<!-- -->0};
memcpy(bodyData, & recv_data->bodyData,RBUFF_UNIT-2);

unsigned short recv_crc = crc16Modbus(bodyData,RBUFF_UNIT-2);
\t\t
if(recv_crc == recv_data->crcData)//check CRC
{<!-- -->
// Debug_printf("RxDataBufCheck recv data:%x,%x,%x,%x,%x\r\\
",
// recv_data->bodyData.headData, recv_data->bodyData.commandData, recv_data->bodyData.lengthData,
// recv_data->bodyData.controlData,recv_data->crcData);
RxDataBufAdd(data); //Add to ring buffer
}
}
}

void RxDataBufAnalyze(unsigned char *data) //Process serial port instructions
{<!-- -->
UARTLCD_debug("RxDataBufAnalyze:%x,%x,%x,%x,%x,%x,%x,%x,%x,%x\r\\
",data[0],data [1],data[2],data[3],data[4],data[5],data[6],data[7],data[8],data[9]);
uartLcdDataFrame_t * recv_data = (uartLcdDataFrame_t *)data;
\t
switch(recv_data->bodyData.commandData)
{<!-- -->
case UARTLCD_COMMAND_INIT_CHECK:
break;
case UARTLCD_COMMAND_FLOW_LEVEL:
break;
case UARTLCD_COMMAND_SMOKE_CLEAN:
break;
case UARTLCD_COMMAND_AIR_CONSUME:
break;
case UARTLCD_COMMAND_PRESSURE_NOW:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_PRESSURE_TARGET:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_PRESSURE_REDUCE:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_PRESSURE_ADD:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_FLOW_NOW:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_FLOW_TARGET:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_FLOW_REDUCE:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_FLOW_ADD:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_PRESSURE_MODE:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_HEAT_STATE:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_AIR_START:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_AIR_INPUT_STATE:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_BUZZER_LEVEL:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_LANGUAGE:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_MESSAGE_WARNING:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_LIGHT_WARNING:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_USB_CHANGE:
devBuzzerSetNum(1);
break;
case UARTLCD_COMMAND_VERSION_MESSGAE:
devBuzzerSetNum(1);
break;
default:
break;
}
}

uart_lcd.h

#ifndef __UART_LCD_H
#define __UART_LCD_H
#include "main.h"
#include "log.h"
#include "usart.h"
#include "eeprom.h"
#include <string.h>

#define UARTLCD_TASK_PERIOD 2 //

#define UARTLCD_LOG_EN 0
#if UARTLCD_LOG_EN
#define UARTLCD_printf(format, ...) printf(RTT_CTRL_TEXT_WHITE format , ##__VA_ARGS__)//"\r\\
"
#define UARTLCD_info(format, ...) printf(RTT_CTRL_TEXT_GREEN"[uartlcd]info:" format , ##__VA_ARGS__)
#define UARTLCD_debug(format, ...) printf(RTT_CTRL_TEXT_WHITE"[uartlcd]debug:" format , ##__VA_ARGS__)
#define UARTLCD_warning(format, ...) printf(RTT_CTRL_TEXT_YELLOW"[uartlcd]warning:" format , ##__VA_ARGS__)
#define UARTLCD_error(format, ...) printf(RTT_CTRL_TEXT_RED"[uartlcd]error:" format ,##__VA_ARGS__)
#else
#define UARTLCD_printf(format, ...)
#define UARTLCD_info(format, ...)
#define UARTLCD_debug(format, ...)
#define UARTLCD_warning(format, ...)
#define UARTLCD_error(format, ...)
#endif

#define R_NUM 20 //The number of buffers (how many frames of data can be cached)
#define RBUFF_UNIT 10 //The length of one frame of data in the buffer

#define T_NUM 20 //The number of buffers (how many frames of data can be cached)
#define TBUFF_UNIT 10 //The length of one frame of data in the buffer

extern unsigned char UART_RxDataBuf[R_NUM][RBUFF_UNIT]; //Receive buffer area
extern unsigned char *UART_RxDataInPtr; //The location where the data is stored in the receiving buffer
extern unsigned char *UART_RxDataOutPtr; //The location where data is read from the receiving buffer
extern unsigned char *UART_RxDataEndPtr; //The end position of the receive buffer

extern unsigned char UART_TxDataBuf[T_NUM][TBUFF_UNIT]; //Send buffer area
extern unsigned char *UART_TxDataInPtr; //The location where the data is stored in the sending buffer
extern unsigned char *UART_TxDataOutPtr; //Send the location of the buffer to read data
extern unsigned char *UART_TxDataEndPtr; //The end position of the sending buffer

#define BUFFER_SIZE 100 //The size of the temporary buffer area for serial port receiving data
extern unsigned char receive_buff[BUFFER_SIZE]; //Temporary buffer area for serial port reception data

typedef struct
{<!-- -->
unsigned short headData; //data header
unsigned char commandData; //data command
unsigned char lengthData; //Data content length
unsigned int controlData; //data content
} uartLcdDataBody_t;

typedef struct
{<!-- -->
uartLcdDataBody_t bodyData; //Message body
unsigned short crcData; //Data verification
} uartLcdDataFrame_t;

enum{<!-- -->
UARTLCD_COMMAND_INIT_CHECK,
UARTLCD_COMMAND_FLOW_LEVEL,
UARTLCD_COMMAND_SMOKE_CLEAN,
UARTLCD_COMMAND_AIR_CONSUME,
UARTLCD_COMMAND_PRESSURE_NOW,
UARTLCD_COMMAND_PRESSURE_TARGET,
UARTLCD_COMMAND_PRESSURE_REDUCE,
UARTLCD_COMMAND_PRESSURE_ADD,
UARTLCD_COMMAND_FLOW_NOW,
UARTLCD_COMMAND_FLOW_TARGET,
UARTLCD_COMMAND_FLOW_REDUCE,
UARTLCD_COMMAND_FLOW_ADD,
UARTLCD_COMMAND_PRESSURE_MODE,
UARTLCD_COMMAND_HEAT_STATE,
UARTLCD_COMMAND_AIR_START,
UARTLCD_COMMAND_AIR_INPUT_STATE,
UARTLCD_COMMAND_BUZZER_LEVEL,
UARTLCD_COMMAND_LANGUAGE,
UARTLCD_COMMAND_MESSAGE_WARNING,
UARTLCD_COMMAND_LIGHT_WARNING,
UARTLCD_COMMAND_USB_CHANGE,
UARTLCD_COMMAND_VERSION_MESSGAE
};

void uartLcdInit(void);
void uartLcdEndInit(void);
void uartLcdTask(void);

unsigned short swapEndian16(unsigned short value);
unsigned int swapEndian32(unsigned int value);
unsigned short crc16Modbus(unsigned char *ptr, unsigned short len);

void uartLcdMainUpdate(unsigned int num);

void TxDataBufAdd(unsigned char *data); //Add a piece of data to be sent to the sending buffer
void RxDataBufAdd(unsigned char *data); //Add a piece of data to be processed to the receiving buffer
void RxDataBufCheck(unsigned char *data,unsigned char length); //Check whether the received serial port data is a frame of qualified data
void RxDataBufAnalyze(unsigned char *data); //Process serial port instructions
void TxDataBufPack(unsigned char command,unsigned int num); //Send serial port data packet
void TxDataBufSend(unsigned char command,unsigned int num); //Send serial port data directly without buffering

#endif