hc32f460 SPI读取一直为0

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jys0305|

楼主 | 2022-12-4 18:29 | 只看该作者回帖奖励

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单片机, HC32F4

使用hc32f460，SPI1，发送0x55，测试时钟和MOSI引脚电平，变化正常。miso脚一直是高电平，但是SPI读出来数据一直是0x00,按理说应该是0xff。SPI 配置如下
#define SD_SPI_PERIPH_CLK       FCG1_PERIPH_SPI1
#define SPI_SD                   CM_SPI1
#define SD_SPI_CS_PORT          GPIO_PORT_A
#define SD_SPI_CS_PIN          GPIO_PIN_04

#define SD_SPI_PORT             GPIO_PORT_A
#define SD_SPI_SCK_PIN          GPIO_PIN_05
#define SD_SPI_MISO_PIN       GPIO_PIN_06
#define SD_SPI_MOSI_PIN       GPIO_PIN_07

#define SD_SPI_SCK_PIN_FUNC       (GPIO_FUNC_43)
#define SD_SPI_MOSI_PIN_FUNC       (GPIO_FUNC_40)
#define SD_SPI_MISO_PIN_FUNC          (GPIO_FUNC_41)
static void App_SPIxCfg(void)
{
stc_gpio_init_t stcGpioInit;
stc_spi_init_t stcSpiInit;
stc_spi_delay_t stcSpiDelayCfg;

(void)GPIO_StructInit(&stcGpioInit);
stcGpioInit.u16PinDrv = PIN_HIGH_DRV;
(void)GPIO_Init(SD_SPI_CS_PORT,  SD_SPI_CS_PIN,  &stcGpioInit);
(void)GPIO_Init(SD_SPI_PORT, SD_SPI_SCK_PIN, &stcGpioInit);
(void)GPIO_Init(SD_SPI_PORT, SD_SPI_MOSI_PIN, &stcGpioInit);
stcGpioInit.u16PinDir = PIN_DIR_OUT;
(void)GPIO_Init(SD_SPI_CS_PORT,  SD_SPI_CS_PIN,  &stcGpioInit);

GPIO_SetFunc(SPI_SCK_PORT, SPI_SCK_PIN, SD_SPI_SCK_PIN_FUNC);
GPIO_SetFunc(SPI_MOSI_PORT, SPI_MOSI_PIN, SD_SPI_MOSI_PIN_FUNC);
GPIO_SetFunc(SPI_MISO_PORT, SPI_MISO_PIN, SD_SPI_MISO_PIN_FUNC);

/* Clear initialize structure */
(void)SPI_StructInit(&stcSpiInit);
(void)SPI_DelayStructInit(&stcSpiDelayCfg);

/* Configure peripheral clock */
FCG_Fcg1PeriphClockCmd(SD_SPI_PERIPH_CLK, ENABLE);

/* SPI De-initialize */
SPI_DeInit(SPI_UNIT);
/* Configuration SPI structure */
stcSpiInit.u32WireMode       = SPI_3_WIRE;
stcSpiInit.u32TransMode       = SPI_FULL_DUPLEX;
stcSpiInit.u32MasterSlave    = SPI_MASTER;
stcSpiInit.u32ModeFaultDetect = SPI_MD_FAULT_DETECT_DISABLE;
stcSpiInit.u32Parity          = SPI_PARITY_INVD;
stcSpiInit.u32SpiMode          = SPI_MD_0;
stcSpiInit.u32BaudRatePrescaler = SPI_BR_CLK_DIV4;
stcSpiInit.u32DataBits       = SPI_DATA_SIZE_8BIT;
stcSpiInit.u32FirstBit       = SPI_FIRST_MSB;
(void)SPI_Init(SPI_UNIT, &stcSpiInit);

stcSpiDelayCfg.u32IntervalDelay = SPI_INTERVAL_TIME_8SCK;
stcSpiDelayCfg.u32ReleaseDelay  = SPI_RELEASE_TIME_8SCK;
stcSpiDelayCfg.u32SetupDelay = SPI_SETUP_TIME_1SCK;
(void)SPI_DelayTimeConfig(SPI_UNIT, &stcSpiDelayCfg);
SPI_Cmd(SPI_UNIT, ENABLE);
}

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hc32f460 SPI读取一直为0

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