AirControlValve/User/Basic_uart.c

/* Copyright Statement:
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 * This software/firmware and related documentation ("AutoChips Software") are
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#include <string.h>
#include "ac780x_uart.h"
#include "ac780x_gpio.h"
#include "ac780x_timer.h"

/*
* 本例程通过使用DMA以及UART空闲中断，实现UART DMA收发，并在UART空闲中断中处理接收的数据
*/

#define PERH_BUS_CLK		(24000000U)
#define TIM_CHN2_PRD_1ms	(PERH_BUS_CLK / 1000 - 1)


#define UARTx   UART0
#define UARTx_IRQn  UART0_IRQn

#define RS485CTRL_PORT (GPIOB)
#define RS485CTRL_PIN  (GPIO_PIN3)

#define RS485_TX_EN				do{GPIO_SetPinLevel(RS485CTRL_PORT, RS485CTRL_PIN, GPIO_LEVEL_HIGH);}while(0)
#define RS485_RX_EN			do{GPIO_SetPinLevel(RS485CTRL_PORT, RS485CTRL_PIN, GPIO_LEVEL_LOW);}while(0)

#define RUNLED_PORT			(GPIOA)
#define RUNLED_PIN			(GPIO_PIN2)

/*RUNLED动作定义.*/	
#define RUNLED_ON				do{GPIO_SetPinLevel(RUNLED_PORT, RUNLED_PIN, GPIO_LEVEL_HIGH);}while(0)
#define RUNLED_OFF			do{GPIO_SetPinLevel(RUNLED_PORT, RUNLED_PIN, GPIO_LEVEL_LOW);}while(0)
#define RUNLED_TOGGLE			do{if(GPIO_GetPinLevel(RUNLED_PORT, RUNLED_PIN)){RUNLED_OFF;}else{RUNLED_ON;}}while(0)


#define BaudRate    9600

#define UART_TRANSMIT_DATA_POOL_COUNT 64
#define UART_RECV_DATA_POOL_COUNT     64
///这里DMA mem设置为32bit模式，所以DMA传输的buffer必须4字节对齐
uint32_t dmaRxBuf[UART_RECV_DATA_POOL_COUNT>>2];
uint32_t dmaTxBuf[UART_TRANSMIT_DATA_POOL_COUNT>>2];

uint8_t *rxBuf = (uint8_t *)dmaRxBuf;
uint8_t *txBuf = (uint8_t *)dmaTxBuf;

uint8_t trans_finished = 1;

uint16_t		g_scanKeyTime;		/*扫描按键间隔时间*/
uint16_t	g_blinkLedTime;		/*LED闪烁频率控制时间*/
uint16_t	g_blinkLedTgtTime;	/*LED目标闪烁频率*/



/**
* UARTTX_DMA_EventCallback
*
* @param[in] device: DMA_Type pointer
* @param[in] wpara: DMA Channel Status
* @param[in] lpara: reserve for user's code
* @return    none
*
* @brief   uart transmit event callback
*/
void UartTxDMAEventCallback(void *device, uint32_t wpara, uint32_t lpara)
{
    if (wpara & DMA_CHANNEL_STATUS_FINISH_Msk)    //!<DMA finish
    {
        //RS485_RX_EN; 
			trans_finished = 100;
    }
    else if (wpara & DMA_CHANNEL_STATUS_HALF_FINISH_Msk)  //!<DMA half finish
    {
        
    }
    else if (wpara & DMA_CHANNEL_STATUS_TRANS_ERROR_Msk)  //!<DMA error
    {
        
    }
    else
    {
        //!<never be here
    }
}


/**
* UARTRX_DMA_EventCallback
*
* @param[in] device: DMA_Type pointer
* @param[in] wpara: DMA Channel Status
* @param[in] lpara: reserve for user's code
* @return    none
*
* @brief   uart dma receive handle
*/
static void UartRxDMAEventCallback(void *device, uint32_t wpara, uint32_t lpara)
{
    /* Check if DMA Channel Receive Complete */
    if (wpara & DMA_CHANNEL_STATUS_FINISH_Msk)    //!<DMA finish
    {

    }
    else if (wpara & DMA_CHANNEL_STATUS_HALF_FINISH_Msk)  //!<DMA half finish
    {
        
    }
    else if (wpara & DMA_CHANNEL_STATUS_TRANS_ERROR_Msk)  //!<DMA error
    {
        
    }
    else
    {
        //!<never be here
    }
}
/**
* UARTRX_DMA_EventCallback
*
* @param[in] device: UART_Type pointer
* @param[in] wpara: UART lsr0 register
* @param[in] lpara: UART lsr1 register
* @return    none
*
* @brief   uart dma receive handle
*/
static void UartRxIdleCallBack(void *device, uint32_t wpara, uint32_t lpara)
{
    /* Check if IDLE interrupt happened */
    if (lpara & UART_LSR1_IDLE_Msk)
    {
        uint16_t recLen;
        uint16_t index;
        ///接收不足4字节会在DMA fifo中缓存
        recLen = DMA0_CHANNEL1->DATA_TRANS_NUM + DMA0_CHANNEL1->FIFO_LEFT_NUM;
        ///将DMA fifo数据flush出来，因为mem设置为32bit，所以fifo也是4字节对齐
        ///(即使fifo里只有1个字节也会刷出4字节，需要保证缓存冗余不会溢出)
        DMA_ChannelFlush(DMA0_CHANNEL1);
        for (index=0;index<recLen;index++)
        {
            txBuf[index] = rxBuf[index];
        }
				
				RS485_TX_EN; 
				trans_finished = 1;
        UART_TransmitDMA(UARTx, DMA0_CHANNEL0, txBuf, recLen, UartTxDMAEventCallback); 

        UART_ReceiveDMA(UARTx, DMA0_CHANNEL1, rxBuf, UART_RECV_DATA_POOL_COUNT, UartRxDMAEventCallback); 
    }
}

/*************<prototype>**************/
void TIM_CHN2_Callback(void *device, uint32_t wpara, uint32_t lpara);

/**
* @prototype TIMER_PrdInit(void)
*
* @param[in] void
* @return	 void
*
* @brief  	 初始化定时器通道2.
*/
void TIMER_PrdInit(void)
{
	TIMER_ConfigType tmrConfig;
	
	/*清零变量.*/
	memset(&tmrConfig, 0x00, sizeof(tmrConfig));
	
	/*配置定时器.*/
	tmrConfig.linkModeEn	= DISABLE;
	tmrConfig.interruptEn	= ENABLE;	
	tmrConfig.periodValue	= TIM_CHN2_PRD_1ms;
	tmrConfig.timerEn		= ENABLE;
	tmrConfig.callBack 		= TIM_CHN2_Callback;
	TIMER_Init(TIMER_CHANNEL2, &tmrConfig);
}

/**
* @prototype TIM_CHN2_Callback(void *device, uint32_t wpara, uint32_t lpara)
*
* @param[in] ...
* @return	 void
*
* @brief  	 定时器通道2中断回调函数.
*/
void TIM_CHN2_Callback(void *device, uint32_t wpara, uint32_t lpara)
{
	if (g_scanKeyTime < 0xFFFF)
	{
		g_scanKeyTime++;
	}
	
	if (g_blinkLedTime < 0xFFFF)
	{
		g_blinkLedTime++;
	}
	
	if(trans_finished > 0 ){
		trans_finished++;
	}
	
}

/**
* Basic_uart
*
* @param[in] none
* @return    none
*
* @brief  Basic_uart function
*/
void Basic_uart(void)
{
    uint8_t i = 0;
    UART_ConfigType  uartConfig;
    memset((void *)&uartConfig, 0, sizeof(UART_ConfigType));

    //set pin mux
    GPIO_SetFunc(GPIOA, GPIO_PIN7, GPIO_FUN1);
    GPIO_SetFunc(GPIOA, GPIO_PIN8, GPIO_FUN1);
	
		//GPIO_SetDir(GPIOA, GPIO_PIN7, GPIO_OUT);
		//GPIO_SetPullup(GPIOA, GPIO_PIN7, ENABLE);
		//GPIO_SetDir(GPIOA, GPIO_PIN8, GPIO_IN);
	
		GPIO_SetFunc(RS485CTRL_PORT, RS485CTRL_PIN, GPIO_FUN0);
		GPIO_SetDir(RS485CTRL_PORT, RS485CTRL_PIN, GPIO_OUT);
	
		GPIO_SetFunc(RUNLED_PORT, RUNLED_PIN, GPIO_FUN0);
		GPIO_SetDir(RUNLED_PORT, RUNLED_PIN, GPIO_OUT);
    
    uartConfig.baudrate = BaudRate;
    uartConfig.dataBits = UART_WORD_LEN_8BIT;
    uartConfig.stopBits = UART_STOP_1BIT;
    uartConfig.parity = UART_PARI_NO;
    uartConfig.fifoByteEn = ENABLE; ///<must enable fifoByte when use DMA
    uartConfig.dmaEn = UART_DMA_TXRX_EN;
	
		
    uartConfig.callBack = UartRxIdleCallBack;   ///<uart2 interrupt callback
    UART_Init(UARTx, &uartConfig);
    UARTx->IDLE |= UART_IDLE_IDLEIE_Msk | UART_IDLE_ILEN_Msk;    ///<enable uart idle interrupt
    
    ///Enable UARTx interrupt
    NVIC_SetPriority(UARTx_IRQn, 3);
    NVIC_ClearPendingIRQ(UARTx_IRQn);
    NVIC_EnableIRQ(UARTx_IRQn);
		
		TIMER_PrdInit();
		
    /* Initializing data in the txBuf */
		
    for (i = 0; i < 10; i++)
    {
        txBuf[i] = i + 1;
    }
		
		RS485_TX_EN;
		trans_finished = 1;
    UART_TransmitDMA(UARTx, DMA0_CHANNEL0, txBuf, 10, UartTxDMAEventCallback); 
    
    UART_ReceiveDMA(UARTx, DMA0_CHANNEL1, rxBuf, UART_RECV_DATA_POOL_COUNT, UartRxDMAEventCallback); 

		
    while(1){
				
				if (g_scanKeyTime >= 1000)/*定时周期到,扫描按键动作.*/
				{
						g_scanKeyTime = 0;
					  RUNLED_TOGGLE;
				}
				
				if(trans_finished >= 120){
						trans_finished = 0;
						RS485_RX_EN;
				}
			
			
			/*
			do{
					if(GPIO_GetPinLevel(GPIOA, GPIO_PIN7)){
							GPIO_SetPinLevel(GPIOA, GPIO_PIN7, GPIO_LEVEL_LOW);
					}else{
							GPIO_SetPinLevel(GPIOA, GPIO_PIN7, GPIO_LEVEL_HIGH);
					
					}
			}while(0);
			*/
			
			//RS485_TX_EN;
			//UART_TransmitDMA(UARTx, DMA0_CHANNEL0, txBuf, 10, UartTxDMAEventCallback); 
		}
}