【灵动微电子MM32F0121测评】+6_硬件SPI测试
spi和i2c一样重要，基本每款MCU都带有硬件SPI,灵动的这款当然也不例外，我们这个开发板上板载了一个W25Q系统的存储芯片，用的就是SPI通信方式，接下来我们对硬件SPI进行初始化
void SPI_Configure(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
SPI_InitTypeDefSPI_InitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
SPI_StructInit(&SPI_InitStruct);
SPI_InitStruct.SPI_Mode = SPI_Mode_Master;
SPI_InitStruct.SPI_DataSize= SPI_DataSize_8b;
SPI_InitStruct.SPI_DataWidth = 8;
SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStruct.SPI_NSS = SPI_NSS_Soft;
SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
SPI_InitStruct.SPI_FirstBit= SPI_FirstBit_MSB;
SPI_Init(SPI1, &SPI_InitStruct);
SPI_BiDirectionalLineConfig(SPI1, SPI_Enable_RX);
SPI_BiDirectionalLineConfig(SPI1, SPI_Enable_TX);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource4,GPIO_AF_0);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource5,GPIO_AF_0);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource6,GPIO_AF_0);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource7,GPIO_AF_0);
GPIO_StructInit(&GPIO_InitStruct);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_7;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_High;
GPIO_InitStruct.GPIO_Mode= GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_StructInit(&GPIO_InitStruct);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_High;
GPIO_InitStruct.GPIO_Mode= GPIO_Mode_IPU;
GPIO_Init(GPIOA, &GPIO_InitStruct);
SPI_Cmd(SPI1, ENABLE);
}
初始化后就是对w25擦除写入数据
uint8_t i = 0;
uint8_t WriteBuffer = "Hello 21ic, Hello MM32F0121", ReadBuffer;
printf("\r\nTest %s", __FUNCTION__);
SPI_Configure();
SPI_FLASH_ReadDeviceID();
SPI_FLASH_ReadJEDEC_ID();
printf("\r\nSPI FLASH Sector Erase...");
SPI_FLASH_SectorErase(0);
printf("\r\nSPI FLASH Read...");
SPI_FLASH_FastRead(0, ReadBuffer, 100);
for (i = 0; i < 100; i++)
{
if (0 == (i % 10))
{
printf("\r\n");
}
printf("0x%02x ", ReadBuffer);
}
printf("\r\nSPI FLASH Page Program...");
SPI_FLASH_PageProgram(0, WriteBuffer, sizeof(WriteBuffer));
printf("\r\nSPI FLASH Read...");
SPI_FLASH_FastRead(0, ReadBuffer, 100);
printf("%s ", ReadBuffer);下面看看串口输出
硬件SPI很不错的案例
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