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UID366127
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- 2019-11-23
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楼主 |
发表于 2017-10-25 08:29:23
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void Spi_Init(void)
{
SPI_InitTypeDef SPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
GPIO_PinAFConfig(GPIOA, GPIO_Pin_5, GPIO_AF_SPI1);
GPIO_PinAFConfig(GPIOA, GPIO_Pin_6, GPIO_AF_SPI1);
GPIO_PinAFConfig(GPIOA, GPIO_Pin_7, GPIO_AF_SPI1);
/*********************************
PA5:SPI1-SCLK
PA6:SPI1-SDO
PA7:SPI1-SDI
**********************************/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA, GPIO_Pin_5);
/********************************
PC1:SPI1-nCS
**********************************/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_SetBits(GPIOC, GPIO_Pin_1);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, DISABLE);
/*SPI1 Confiure*/
SPI_Cmd(SPI1, DISABLE);
SPI_I2S_DeInit(SPI1);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_Full Duplex;
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_64;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);
SPI_Cmd(SPI1, ENABLE);
SPI1_ReadWriteByte(0xff);
}
这是spi1的配置代码,大家帮忙看看!谢啦 |
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