问答

GD32F103C8T6 SPI做从机，中断可以接收数据，但是不能发送数据出去，使用的模式是全双工，有遇到过这种吗？我用另外一个GD32F205的芯片，做SPI从机就是可以同时收发的，这个芯片就是发不出来，我对了一下官方的例程，没有发现代码问题在哪，代码如下 /** * [url=home.php?mod=space&uid=247401]@brief[/url] SPI_FLASH初始化 * @param 无 * @retval 无 */ void BSP_SPI_Init(void) { spi_parameter_struct spi_init_struct; #ifndef SPI_MODE_MASTER /* configure SPI1 NVIC */ nvic_irq_enable(SPI1_IRQn,1,3); #endif /* SPI clock enable */ rcu_periph_clock_enable(RCU_GPIOB); rcu_periph_clock_enable(RCU_SPI1); /* SPI1 GPIO config */ #ifdef SPI_MODE_MASTER //MASTER //CS gpio_init(SPI1_CS_PORT, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, SPI1_CS_PIN); //SCK MOSI gpio_init(SPI1_SCK_PORT, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, SPI1_SCK_PIN); gpio_init(SPI1_MOSI_PORT, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, SPI1_MOSI_PIN); //MISO gpio_init(SPI1_MISO_PORT, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, SPI1_MISO_PIN); #else //SLAVE //CS gpio_init(SPI1_CS_PORT, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, SPI1_CS_PIN); //SCK MOSI gpio_init(SPI1_SCK_PORT, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, SPI1_SCK_PIN); gpio_init(SPI1_MOSI_PORT, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, SPI1_MOSI_PIN); //MISO gpio_init(SPI1_MISO_PORT, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, SPI1_MISO_PIN); #endif /* chip select invalid */ gpio_bit_write(SPI1_CS_PORT, SPI1_CS_PIN, SET); /* deinitilize SPI and the parameters */ spi_i2s_deinit(SPI1); spi_struct_para_init(&spi_init_struct); /* SPI1 parameter config */ spi_init_struct.trans_mode = SPI_TRANSMODE_FULLDUPLEX; #ifdef SPI_MODE_MASTER spi_init_struct.device_mode = SPI_MASTER; spi_init_struct.clock_polarity_phase = SPI_CK_PL_HIGH_PH_2EDGE; #else spi_init_struct.device_mode = SPI_SLAVE; spi_init_struct.clock_polarity_phase = SPI_CK_PL_LOW_PH_1EDGE; #endif spi_init_struct.frame_size = SPI_FRAMESIZE_8BIT; spi_init_struct.nss = SPI_NSS_SOFT; spi_init_struct.prescale = SPI_PSC_64;//1M spi_init_struct.endian = SPI_ENDIAN_MSB; spi_init(SPI1, &spi_init_struct); #ifndef SPI_MODE_MASTER /* SPI int enable */ spi_i2s_interrupt_enable(SPI1, SPI_I2S_INT_RBNE); #endif /* SPI enable */ spi_enable(SPI1); } #ifndef SPI_MODE_MASTER /*! \brief this function handles SPI1 Handler exception \param[in] none \param[out] none \retval none */ void SPI1_IRQHandler(void) { if(RESET != spi_i2s_interrupt_flag_get(SPI1,SPI_I2S_INT_FLAG_RBNE)) { usart_interrupt_flag_clear(SPI1,SPI_FLAG_RBNE); // received data System.com.spi_rx[System.com.spi_rev] = spi_i2s_data_receive(SPI1); //保存数据 System.com.spi_rev++; spi_i2s_data_transmit(SPI1, System.com.spi_tx[System.com.spi_rev]); //? if(System.com.spi_rev > 4) { System.com.spi_tx_len = System.com.spi_rx[3] * 256 + System.com.spi_rx[4] + 5; if(System.com.spi_rev > System.com.spi_tx_len) //if(System.com.spi_rev > 22) { System.com.spi_rev = 0; System.com.spi_flag |= 0x80; spi_i2s_data_transmit(SPI1, PACKET_SYNC); } } } } #endif