HHMD600单片机初始化spi3驱动
时间: 2023-05-29 08:02:52 浏览: 58
对于STM32的SPI3驱动初始化,在使用之前要进行GPIO的配置,此处以PA4作为NSS引脚,PB3作为SCK引脚,PB4作为MISO引脚,PB5作为MOSI引脚。
```c
//步骤1:开启SPI3时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);
//步骤2:配置GPIO口
GPIO_InitTypeDef GPIO_InitStructure;
//NSS引脚配置
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//SCK引脚、MISO引脚与MOSI引脚配置
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//步骤3:配置SPI3
SPI_InitTypeDef SPI_InitStructure;
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI3, &SPI_InitStructure);
//步骤4:使能SPI3
SPI_Cmd(SPI3, ENABLE);
```
以上就是HHMD600单片机初始化SPI3驱动的步骤。当配置好GPIO口和SPI3后,就可以通过SPI3驱动连接外设了。