SPI配置主模式 SCL可以输出时钟信号，SDA确没有数据

只看该作者 · 2024-9-29 15:09

程序配置如下，有哪位大佬有时间看下吗？
void SPI_FullDuplex_Init()
{
GPIO_Config_T gpioConfig;
SPI_Config_T spiConfig;

/* Enable related Clock */
RCM_EnableAPB2PeriphClock(RCM_APB2_PERIPH_SPI1);
RCM_EnableAPB2PeriphClock(RCM_APB2_PERIPH_GPIOA);

/* config PIN_6  MISO */
gpioConfig.pin =  GPIO_PIN_6 ;
gpioConfig.mode = GPIO_MODE_AF_PP;
gpioConfig.speed = GPIO_SPEED_50MHz;
GPIO_Config(GPIOA, &gpioConfig);

/* config PIN_5->SCK , PIN_7->MOSI */
gpioConfig.pin = GPIO_PIN_5 | GPIO_PIN_7;
gpioConfig.mode = GPIO_MODE_AF_PP;
gpioConfig.speed = GPIO_SPEED_50MHz;
GPIO_Config(GPIOA, &gpioConfig);

SPI_ConfigStructInit(&spiConfig);

spiConfig.length = SPI_DATA_LENGTH_16B;

spiConfig.baudrateDiv = SPI_BAUDRATE_DIV_32;
/* 2 line full duplex */
spiConfig.direction = SPI_DIRECTION_1LINE_TX;
/* LSB first */
spiConfig.firstBit = SPI_FIRSTBIT_MSB;
/* Slave mode */
spiConfig.mode = SPI_MODE_MASTER;
/* Polarity is low */
spiConfig.polarity = SPI_CLKPOL_LOW;
/*  Software select slave enable  */
spiConfig.nss = SPI_NSS_SOFT;
/* Phase is 1 edge */
spiConfig.phase = SPI_CLKPHA_1EDGE;
/* SPI config */
SPI_Config(SPI1, &spiConfig);

SPI_ConfigDataSize(SPI1, SPI_DATA_LENGTH_16B);

SPI_Enable(SPI1);
}

只看该作者 · 2024-9-29 15:25

如图，1通道是单片机SDA；2通道是单片机SCL；每50ms调用一次函数，对应数据发送一次
void SpiTransmit (void)
{

if(SET == SPI_I2S_ReadStatusFlag(SPI1, SPI_FLAG_TXBE))
{

SPI_I2S_TxData(SPI1, 0xaaaa);
}
}

只看该作者 · 2024-9-29 15:46

好了已解决