关于SPI 时钟线的问题。。。求教时钟线一直都是高电平，没出现方波。

a111204508_c · 发表于 2013-5-20 10:07:21

void SPI_CC1101_Init(void)

{

SPI_InitTypeDef SPI_InitStructure;

GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOC , ENABLE);

/* Enable SPI1 and GPIO clocks */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);

/* Configure SPI1 pins: SCK, MISO and MOSI */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_SCLK | GPIO_Pin_SO | GPIO_Pin_SI | GPIO_Pin_2 | GPIO_Pin_4;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_4;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOA, &GPIO_InitStructure);

/* Configure I/O for Flash Chip select */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_CS;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_Init(GPIO_CS, &GPIO_InitStructure);

/* Configure I/O for PC4,PC5 */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_GD2| GPIO_Pin_GD0;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOC, &GPIO_InitStructure);

/* SPI1 configuration */

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_4;

SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;

SPI_InitStructure.SPI_CRCPolynomial = 7;

SPI_Init(SPI1, &SPI_InitStructure);

/* Enable SPI1 */

SPI_Cmd(SPI1, ENABLE);

}

SPI配置代码

正点原子 · 发表于 2013-5-20 17:31:45

main函数改为：

int main(void)
{
u8 key;
u16 i=0;
// u8 datatemp[SIZE];
SystemInit();
delay_init(72);      //延时初始化
NVIC_Configuration();
uart_init(9600);
LED_Init();
KEY_Init();
LCD_Init();
SPI_CC1101_Init();
// SPI_Flash_Init();   //SPI FLASH 初始化

POINT_COLOR=RED;//设置字体为蓝色
LCD_ShowString(60,50,"Mini STM32");
LCD_ShowString(60,70,"SPI TEST");
LCD_ShowString(60,90,"wu han qing hgong");
LCD_ShowString(60,110,"2013/5/17");
LCD_ShowString(60,130,"W25X16 Ready!");
//显示提示信息
LCD_ShowString(60,150,"KEY0:Read ");

POINT_COLOR=BLUE;//设置字体为蓝色
while(1)
{
halSpiStrobe(0XAA);
}
}

在测试有无波形！