Air101_LCD

AIR32F103引脚次序

1: B01

2: B00

3:GND

4: 3.3V

 

AIR101_LCD 引脚次序

1: GND,

2: 3V3

3: SCK  CLK 

4: SDA  MOSI

5: RES  复位

6: DC  0:写命令 1:写数据

7: BL  

 

 

驱动IC: 7735V

 

static void _DMA_Init(void) {
	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

    /* 初始化DMA1通道3 用于SPI1发送 */
    DMA_InitTypeDef DMA_InitStructure;
    DMA_DeInit(DMA1_Channel3);
    DMA_InitStructure.DMA_BufferSize = 0;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) &(SPI1->DR);
    //DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) &_Buffer;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
    DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_Init(DMA1_Channel3, &DMA_InitStructure);
}

static void _SPI_Init(void) {
	GPIO_InitTypeDef GPIO_InitStructure;
	SPI_InitTypeDef  SPI_InitStructure;
	
	RCC_APB2PeriphClockCmd(	RCC_APB2Periph_GPIOA, ENABLE );//PORT时钟使能 
	RCC_APB2PeriphClockCmd(	RCC_APB2Periph_SPI1,  ENABLE );//SPI时钟使能 	

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_7;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出 
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIO

	GPIO_SetBits(GPIOA,GPIO_Pin_5 | GPIO_Pin_7);

	SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx;  //设置SPI单向或者双向的数据模式:SPI设置为双线双向全双工
	SPI_InitStructure.SPI_Mode = SPI_Mode_Master;		//设置SPI工作模式:设置为主SPI
	SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;		//设置SPI的数据大小:SPI发送接收8位帧结构
	SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;		//串行同步时钟的空闲状态为低电平
	SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;	//串行同步时钟的第一个跳变沿（上升或下降）数据被采样
	SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;		//NSS信号由硬件（NSS管脚）还是软件（使用SSI位）管理:内部NSS信号有SSI位控制
	SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;		//定义波特率预分频的值:波特率预分频值为256
	SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;	//指定数据传输从MSB位还是LSB位开始:数据传输从MSB位开始
	SPI_InitStructure.SPI_CRCPolynomial = 0;
	SPI_Init(SPI1, &SPI_InitStructure);  //根据SPI_InitStruct中指定的参数初始化外设SPIx寄存器

	SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE); //使能SPI1的DMA发送
	
	SPI_Cmd(SPI1, ENABLE); //使能SPI外设
}

static void _SPI_DMA_Send(void* buffer, int itemCnt) {
	while (DMA_GetCurrDataCounter(DMA1_Channel3));
	DMA_Cmd(DMA1_Channel3, DISABLE);
	
    DMA_ClearFlag(DMA1_FLAG_TC3);
	DMA1_Channel3->CMAR = (uint32_t)buffer;    
	DMA1_Channel3->CNDTR = itemCnt;
	
    DMA_Cmd(DMA1_Channel3, ENABLE); //开始发送	
	while (DMA_GetCurrDataCounter(DMA1_Channel3));
}