GD32 spi的半双工通信异常，接收的数据一直有问题

只看该作者 · 2024-3-25 18:26

下面是初始化和发送函数，难道GD的库要在发送和接收时分别切换一次模式，切换发送和接收模式。

#define CURRENT_SPI     SPI1

#define READ_MODE   spi_disable(CURRENT_SPI); \

                    spi_bidirectional_transfer_config(CURRENT_SPI, SPI_BIDIRECTIONAL_RECEIVE); \

                    spi_enable(CURRENT_SPI);

#define WRITE_MODE  spi_disable(CURRENT_SPI); \

                    spi_bidirectional_transfer_config(CURRENT_SPI, SPI_BIDIRECTIONAL_TRANSMIT); \

                    spi_enable(CURRENT_SPI);



void spi_config(void)

{

        

        rcu_periph_clock_enable(RCU_GPIOB);

        //rcu_periph_clock_enable(RCU_AF);

        gpio_init(GPIOB, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_13 | GPIO_PIN_15);//MOSI 和 CLK

 

        //gpio_init(GPIOB, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, GPIO_PIN_6);

 

        gpio_init(GPIOB, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_12);//片选引脚cs

        rcu_periph_clock_enable(RCU_SPI1);



        

        spi_i2s_deinit(CURRENT_SPI);   

        spi_struct_para_init(&spi2);                // 初始化spi_init_struct结构体，设置默认参数        

        spi2.device_mode = SPI_MASTER;

        spi2.trans_mode  = SPI_TRANSMODE_BDTRANSMIT;

        spi2.clock_polarity_phase = SPI_CK_PL_LOW_PH_1EDGE;

        spi2.frame_size = SPI_FRAMESIZE_8BIT;

        spi2.nss = SPI_NSS_SOFT;

        spi2.prescale = SPI_PSC_64;

        spi2.endian = SPI_ENDIAN_MSB;

        spi_init(CURRENT_SPI, &spi2);        // 使用配置好的spi2结构体初始化SPI2

         

    spi_crc_polynomial_set(CURRENT_SPI, 10);

 

    spi_crc_on(CURRENT_SPI);

        spi_enable(CURRENT_SPI);

        //spi_nss_output_enable(CURRENT_SPI);

        

}



void Well_Hal_spi_write_byte(uint8_t btye)

{

//        SPI_I2S_SendData(&hspi2,&btye,1,1000);



        while (spi_i2s_flag_get(CURRENT_SPI, SPI_FLAG_TBE) == RESET);        

        spi_i2s_data_transmit(CURRENT_SPI, btye);

        while(spi_i2s_flag_get(CURRENT_SPI, SPI_FLAG_TRANS));





}