mb_port.c

/**
  ******************************************************************************
  * @file    mb_port.c
  * @author  Derrick Wang
  * @brief   modebus移植接口
  ******************************************************************************
  * @note
  * 该文件为modbus移植接口的实现，根据不同的MCU平台进行移植
  ******************************************************************************
  */


#include "mb_include.h"
#include "tim.h"
#include "usart.h"
#include "gpio.h"


void mb_port_uartInit(uint32_t baud,uint8_t parity)
{
	/*串口部分初始化*/
	huart1.Instance = USART1;
	huart1.Init.BaudRate = baud;
	huart1.Init.WordLength = UART_WORDLENGTH_8B;
	if(parity==MB_PARITY_ODD)
	{
		huart1.Init.StopBits = UART_STOPBITS_1;
		huart1.Init.Parity = UART_PARITY_ODD;	
	}
	else if(parity==MB_PARITY_EVEN)
	{
		huart1.Init.StopBits = UART_STOPBITS_1;
		huart1.Init.Parity = UART_PARITY_EVEN;
	}
	else
	{
		huart1.Init.StopBits = UART_STOPBITS_2;
		huart1.Init.Parity = UART_PARITY_NONE;	
	}
	huart1.Init.Mode = UART_MODE_TX_RX;
	huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
	huart1.Init.OverSampling = UART_OVERSAMPLING_16;
	if (HAL_UART_Init(&huart1) != HAL_OK)
	{
	Error_Handler();
	}	
}

void mb_port_uartEnable(uint8_t txen,uint8_t rxen)
{
	if(txen)
	{
		__HAL_UART_ENABLE_IT(&huart1,UART_IT_TXE);
	}
	else
	{
		__HAL_UART_DISABLE_IT(&huart1,UART_IT_TXE);
	}
	
	if(rxen)
	{
		__HAL_UART_ENABLE_IT(&huart1,UART_IT_RXNE);
	}
	else
	{
		__HAL_UART_DISABLE_IT(&huart1,UART_IT_RXNE);
	}		
}
void mb_port_putchar(uint8_t ch)
{
	huart1.Instance->DR = ch;  //直接操作寄存器比HAL封装的更高效
}

void mb_port_getchar(uint8_t *ch)
{
	*ch= (uint8_t)(huart1.Instance->DR & (uint8_t)0x00FF);	
}

void mb_port_timerInit(uint32_t baud)
{
	/*定时器部分初始化*/
	htim3.Instance = TIM3;
	htim3.Init.Prescaler = 71;
	htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
	if(baud>19200)   //波特率大于19200固定使用1800作为3.5T
	{
		htim3.Init.Period = 1800;
	}
	else   //其他波特率的需要根据计算
	{
		/*	us=1s/(baud/11)*1000000*3.5
		*			=(11*1000000*3.5)/baud
		*			=38500000/baud
		*/
		htim3.Init.Period = (uint32_t)38500000/baud;
	
	}
	htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
	htim3.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
	if (HAL_TIM_Base_Init(&htim3) != HAL_OK)
	{
	Error_Handler();
	}		
}

void mb_port_timerEnable()
{
	__HAL_TIM_DISABLE(&htim3);
	__HAL_TIM_CLEAR_IT(&htim3,TIM_IT_UPDATE);                //清除中断位
	__HAL_TIM_ENABLE_IT(&htim3,TIM_IT_UPDATE);                //使能中断位
	__HAL_TIM_SET_COUNTER(&htim3,0);                           //设置定时器计数为0
	__HAL_TIM_ENABLE(&htim3);                                 //使能定时器
}

void mb_port_timerDisable()
{
	__HAL_TIM_DISABLE(&htim3);
	__HAL_TIM_SET_COUNTER(&htim3,0); 
	__HAL_TIM_DISABLE_IT(&htim3,TIM_IT_UPDATE);
	__HAL_TIM_CLEAR_IT(&htim3,TIM_IT_UPDATE);
}

//串口中断服务函数
void USART1_IRQHandler()
{
	HAL_NVIC_ClearPendingIRQ(USART1_IRQn);
	if((__HAL_UART_GET_FLAG(&huart1,UART_FLAG_RXNE)!=RESET))
	{
		__HAL_UART_CLEAR_FLAG(&huart1,UART_FLAG_RXNE);
		mbh_uartRxIsr();
	}
	if((__HAL_UART_GET_FLAG(&huart1,UART_FLAG_TXE)!=RESET))
	{
		__HAL_UART_CLEAR_FLAG(&huart1,UART_FLAG_TXE);
		mbh_uartTxIsr();
	}
}

//定时器中断服务函数
void TIM3_IRQHandler()
{
	__HAL_TIM_CLEAR_IT(&htim3,TIM_IT_UPDATE);
	mbh_timer3T5Isr();
}