stm32 spi 的demo 我要用NUC123实现要怎么配啊，弄了好多次.....

只看该作者 · 2017-8-28 15:31

void SPI_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1 | RCC_APB2Periph_AFIO, ENABLE);

/* 初始化SCK、MISO、MOSI引脚 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);

/* 初始化CS引脚 */
GPIO_InitStructure.GPIO_Pin = W5500_SCS;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_Init(W5500_SCS_PORT, &GPIO_InitStructure);
GPIO_SetBits(W5500_SCS_PORT, W5500_SCS);

/* 初始化配置STM32 SPI1 */
SPI_InitStructure.SPI_Direction=SPI_Direction_2Lines_FullDuplex; //SPI设置为双线双向全双工
SPI_InitStructure.SPI_Mode=SPI_Mode_Master; //设置为主SPI
SPI_InitStructure.SPI_DataSize=SPI_DataSize_8b; //SPI发送接收8位帧结构
SPI_InitStructure.SPI_CPOL=SPI_CPOL_Low; //时钟悬空低
SPI_InitStructure.SPI_CPHA=SPI_CPHA_1Edge; //数据捕获于第1个时钟沿
SPI_InitStructure.SPI_NSS=SPI_NSS_Soft; //NSS由外部管脚管理
SPI_InitStructure.SPI_BaudRatePrescaler=SPI_BaudRatePrescaler_2; //波特率预分频值为2
SPI_InitStructure.SPI_FirstBit=SPI_FirstBit_MSB; //数据传输从MSB位开始
SPI_InitStructure.SPI_CRCPolynomial=7; //CRC多项式为7
SPI_Init(SPI1,&SPI_InitStructure); //根据SPI_InitStruct中指定的参数初始化外设SPI1寄存器

SPI_Cmd(SPI1,ENABLE); //STM32使能SPI1
}
############NUC123#################
CLK_SetModuleClock(SPI0_MODULE, CLK_CLKSEL1_SPI0_S_HCLK, MODULE_NoMsk);
CLK_EnableModuleClock(SPI0_MODULE);
SPI_Open(SPI0, SPI_MASTER, SPI_MODE_3, 8, NULL);
SPI_SET_SS0_LOW(SPI0);
SPI_SET_MSB_FIRST(SPI0);
SYS->GPC_MFP = SYS_GPC_MFP_PC0_SPI0_SS0 | SYS_GPC_MFP_PC1_SPI0_CLK | SYS_GPC_MFP_PC2_SPI0_MISO0 | SYS_GPC_MFP_PC3_SPI0_MOSI0;
SYS->ALT_MFP = SYS_ALT_MFP_PC0_SPI0_SS0 | SYS_ALT_MFP_PC1_SPI0_CLK | SYS_ALT_MFP_PC2_SPI0_MISO0 | SYS_ALT_MFP_PC3_SPI0_MOSI0;