TrainCamp_fubowen_Modbus/app/inc/hardware.h

#ifndef __HARDWARE_H
#define __HARDWARE_H

#include"modbus_parse.h"

#if (MODBUS_USART_BAUDRATE > 19200U)

/*固定等待1750us，再减去IDLE中断等待的1个字符时间*/
#define MODBUS_IDLE_TO_T35_US \
            ((1750UL * MODBUS_USART_BAUDRATE - 10000000UL + MODBUS_USART_BAUDRATE - 1UL) / MODBUS_USART_BAUDRATE)

#else

/*IDLE中断已经过了1个字符的时间，还需等待2.5个字符*/
#define MODBUS_IDLE_TO_T35_US \
            ((25000000UL + MODBUS_USART_BAUDRATE - 1UL) / MODBUS_USART_BAUDRATE)

#endif


extern uint8_t ModbusRxBuf[MODBUS_RX_BUF_SIZE];
extern uint8_t ModbusTxBuf[MODBUS_TX_BUF_SIZE];


void ModbusHardwareInit(void);


#endif