山景BP1048 GPIO通过DMA方式输出

最新推荐文章于 2024-09-26 19:21:57 发布

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CC 4.0 BY-SA版权

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#单片机 #c++ #嵌入式硬件

山景单片机开发专栏收录该内容

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订阅专栏

该代码段展示了如何在嵌入式系统中初始化LED通路资源，使用DMA和定时器进行数据传输。它定义了与GPIO端口、定时器寄存器相关的常量，并设置了一个大型的数据缓冲区用于DMA传输。通过数据转换函数将RGB值转化为适合DMA传输的格式，并通过`data_send`函数处理并发送数据到DMA通道。

数据定义

//音频通路资源初始化
#define LED_BUFFER_LEN		(8*4*3*18)//8*4*3*3 + 800//1024
#define	ADR_GPIO_A_REG_O	(0x40010004+3)
#define	REG_TIMER4_CTRL		(*(volatile unsigned long *) 0x4002C800)
#define	REG_TIMER4_NUM		(*(volatile unsigned long *) 0x4002C80C)
//#define gpio_a20             1<<4
#define RGB_LED_NUM 18//126

uint32_t rgb_buf[3*RGB_LED_NUM];

#ifndef CFG_MORE_GPIO_RGB_CTRL_EN
#define LED_PORT		LED_GPIO1	//1<<4
#define	LED_GPIO1		1<<4

typedef struct{
	uint8_t rgb_pwm_cnt;
	uint8_t buf[32];//
#ifdef CFG_MORE_GPIO_RGB_CTRL_EN
	uint8_t buf1[32];
#endif
//	int8_t buf_bak[RGB_LED_NUM];
}RGB_ST;

 RGB_ST RGB_R;
 RGB_ST RGB_G;
 RGB_ST RGB_B;


uint8_t  DmaTestBuffer[LED_BUFFER_LEN]=
{
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//1
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//2
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//3
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//4
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//5
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//6

	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
 //7
    LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//8
    LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//9
    LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//10
    LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//11
    LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
 //12
    LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//13
    LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//14
    LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//15 
    LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//16

	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
//17
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
	LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,LED_PORT,0,0,0,
};

初始化

/*
*********************************************************
*				IO口和DMA通道初始化
*********************************************************
*/
void Led_Dma_Proc_Init(void)
{
	DMA_CONFIG DMAConfig;
	uint32_t DmaTestLen;
	memset(DmaTestBuffer,0,sizeof(DmaTestBuffer));
	GPIO_RegOneBitClear(GPIO_A_IE, GPIOA28);
	GPIO_RegOneBitSet(GPIO_A_OE, GPIOA28);

	DmaTestLen = LED_BUFFER_LEN;//LED_BUFFER_LEN*4;
	DMAConfig.Dir = DMA_CHANNEL_DIR_MEM2PERI;
	DMAConfig.Mode = DMA_BLOCK_MODE; //DMA_CIRCULAR_MODE;
	DMAConfig.SrcAddress = (uint32_t)DmaTestBuffer;
	DMAConfig.SrcDataWidth = DMA_SRC_DWIDTH_BYTE;
	DMAConfig.SrcAddrIncremental = DMA_SRC_AINCR_SRC_WIDTH;
	DMAConfig.DstAddress = ADR_GPIO_A_REG_O;

	GPIO_RegBitsSet(GPIO_A_DMA_OUT_MASK, (~(GPIO_INDEX28)));

	DMAConfig.DstDataWidth =  DMA_DST_DWIDTH_BYTE;
	DMAConfig.DstAddrIncremental = DMA_DST_AINCR_NO;
	DMAConfig.BufferLen = DmaTestLen;
	DMA_TimerConfig(PERIPHERAL_ID_TIMER4, &DMAConfig);
	DMA_BlockConfig(PERIPHERAL_ID_TIMER4);
	DMA_BlockBufSet(PERIPHERAL_ID_TIMER4,DmaTestBuffer,DmaTestLen);
	//DMA_CircularWritePtrSet(PERIPHERAL_ID_TIMER4, DmaTestLen+16);//将写指针指向buffer外
	DMA_ChannelEnable(PERIPHERAL_ID_TIMER4);
	Timer_Config(TIMER4, 1, 0);
	REG_TIMER4_NUM = 47;//41;//
	Timer_Start(TIMER4);
	REG_TIMER4_CTRL |= (1<<8);
}

数据转换和发送数据接口

/*
///////////////////////////////////////////////////////////////////
//						数据转换函数1							 //
///////////////////////////////////////////////////////////////////
*/
uint32_t rgb_data_change(uint8_t data)	//24 = 3*8
{
	uint32_t data_u32 = 0;
    uint8_t i;
	for(i = 0;i<8;i++){
		// 1 --> 1110   0--> 1000
		if(data & BIT(7)){
			data_u32 = data_u32 | (0x0e);
		}else{
			data_u32 = data_u32 | (0x08);
		}
		data <<= 1;
		if(i < 7){
			data_u32 <<= 4;
		}
	}
	return data_u32;
}

/*
******************************************************
*				将数据传送到DMA通道中
******************************************************
*/
void DmaDataChange1(void)
{
	uint32_t TempData;
	uint16_t i, j;

   for(i=0;i<54;i++)
   {
		for(j=0;j<32;j++)
		{
			TempData = 0;
			if(rgb_buf[i] &  BIT(31-j)){
				TempData = LED_GPIO1;//TempData = LED_PORT;
			}
			DmaTestBuffer[ i*32+j] =(uint8_t) TempData;
		}
  }
}

/*
///////////////////////////////////////////////////////////////////
//						数据转换函数2							 //
///////////////////////////////////////////////////////////////////
*/
void rgb_data_deal(void)
{
	uint32_t g_data_32,r_data_32,b_data_32 = 0;
    uint8_t i;

    g_data_32 = 0;
	r_data_32 = 0;
	b_data_32 = 0;
	for( i = 0;i< RGB_LED_NUM;i++){

        r_data_32 = rgb_data_change(RGB_R.buf[i]);
        g_data_32 = rgb_data_change(RGB_G.buf[i]);
        b_data_32 = rgb_data_change(RGB_B.buf[i]);
        rgb_buf[i*3] = g_data_32;
        rgb_buf[i*3+1] =  r_data_32;
        rgb_buf[i*3+2] = b_data_32;
	}
}


void data_send(unsigned char * pstr, unsigned char nbr)
{
	uint8_t i = 0;
	for(i = 0; i < 18; i++)
	{
		RGB_R.buf[i] = pstr[i * 3 + 0];
		RGB_G.buf[i] = pstr[i * 3 + 1];
		RGB_B.buf[i] = pstr[i * 3 + 2];
	}
	rgb_data_deal();
	DmaDataChange1();

	DMA_InterruptFlagClear(PERIPHERAL_ID_TIMER4,DMA_DONE_INT);
	Timer_InterruptFlagClear(TIMER4,UPDATE_INTERRUPT_SRC);
	Timer_Pause(TIMER4,1);
	DMA_ChannelDisable(PERIPHERAL_ID_TIMER4);
	DMA_BlockBufSet(PERIPHERAL_ID_TIMER4,DmaTestBuffer,LED_BUFFER_LEN);
	DMA_ChannelEnable(PERIPHERAL_ID_TIMER4);
	Timer_Pause(TIMER4,0);
}