82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
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#ifndef _FLUX_UART_H
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#define _FLUX_UART_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdio.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "driver/uart.h"
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#include "driver/gpio.h"
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#include "sdkconfig.h"
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#include "esp_log.h"
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#include "FluxDisplayPort.h"
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/* UART */
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/* UART1 RT-2 TX-1*/
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/* UART2 RT-46 TX-45*/
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#define ECHO_TEST_TXD2 (45)
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#define ECHO_TEST_RXD2 (46)
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#define ECHO_UART_PORT_NUM2 (UART_NUM_2)
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#define ECHO_TEST_TXD1 (1)
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#define ECHO_TEST_RXD1 (2)
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#define ECHO_UART_PORT_NUM1 (UART_NUM_1)
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#define ECHO_TEST_RTS (UART_PIN_NO_CHANGE)
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#define ECHO_TEST_CTS (UART_PIN_NO_CHANGE)
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#define ECHO_UART_BAUD_RATE (9600)
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#define ECHO_TASK_STACK_SIZE (16*1024)
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/* Choose whether to use big-endian or little-endian. Modbus-RTU communication uses little-endian. */
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#define BIG_ENDIAN_USED 0
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#define LITTLE_ENDIAN_USED !BIG_ENDIAN_USED
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/* Digital flow meter address */
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#define FLUX_ADDR 0x01
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#define FLUX_FUNC_READ 0x03
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#define FLUX_FUNC_SET 0x16
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/* Modbus-RTU frame format */
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/* All data from the wet flow meter are two bytes long */
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/*
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ADDR : 1byte
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FUNC : 1byte
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DATA : 2byte
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CRC : 2byte
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*/
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struct ModbusRTU_Frame
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{
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unsigned char ADDR;
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unsigned char FUNC;
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unsigned char DATA[4];
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unsigned char CRC[2];
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};
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extern struct ModbusRTU_Frame flux_frame;
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extern struct ModbusRTU_Frame breath_frame;
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/* UART1 response task */
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void uart1_echoTask(void);
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/* UART2 response task */
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void uart2_echoTask(void);
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/* CRC16 checksum */
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unsigned short CRC16(unsigned char* pchMsg, unsigned short wDataLen);
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esp_err_t ModbusRTU_Send(uart_port_t uart_num, struct ModbusRTU_Frame *frame);
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#ifdef __cplusplus
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} /*extern "C"*/
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#endif
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#endif |