#include "Uart.h" #include "fifo.h" uint8_t g_bPrintDebug = 0; void usart0_config(void) { /* enable GPIO clock */ rcu_periph_clock_enable(RCU_GPIOA); /* enable USART clock */ rcu_periph_clock_enable(RCU_USART0); /* connect port to USARTx_Tx */ gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9); /* connect port to USARTx_Rx */ gpio_init(GPIOA, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, GPIO_PIN_10); /* USART configure */ usart_deinit(USART0); usart_word_length_set(USART0, USART_WL_8BIT); usart_stop_bit_set(USART0, USART_STB_1BIT); usart_parity_config(USART0, USART_PM_NONE); usart_baudrate_set(USART0, 115200U); usart_receive_config(USART0, USART_RECEIVE_ENABLE); usart_transmit_config(USART0, USART_TRANSMIT_ENABLE); usart_enable(USART0); } /* retarget the C library printf function to the USART */ int fputc(int ch, FILE *f) { usart_data_transmit(USART0, (uint8_t)ch); while(RESET == usart_flag_get(USART0, USART_FLAG_TC)); return ch; } /*测试串口输出4G接收到的数据*/ void data_dump(const char *name, uint8_t *data, uint16_t length) { int index = 0; if(g_bPrintDebug == 0) return; printf("%s Data Info: \r\n ", name); for(index = 0;index < length;index++) { if((index%4 == 0)&&index) { if((index%16 == 0)&&index) { printf("\r\n "); } else { printf(" "); } } printf("%02x ", *(data + index)); } printf("\r\n"); } void data_dump_00(const char *name, uint8_t *data, uint16_t length) { int index = 0; printf("%s Data Info: \r\n ", name); for(index = 0;index < length;index++) { if((index%4 == 0)&&index) { if((index%16 == 0)&&index) { printf("\r\n "); } else { printf(" "); } } printf("%02x ", *(data + index)); } printf("\r\n"); } /*------------------------------------------485----------------------------------------*/ void USART1_IRQHandler(void) { volatile uint8_t len = 0; if((RESET != usart_interrupt_flag_get(USART1, USART_INT_FLAG_IDLE)) \ && (RESET != usart_flag_get(USART1, USART_FLAG_IDLEF))) { usart_interrupt_flag_clear(USART1, USART_INT_FLAG_IDLE);// usart_flag_clear(USART1, USART_FLAG_IDLEF); dma_channel_disable(DMA0, DMA_CH5); usart_data_receive(USART1); len = USART3_RX_SIZE - dma_transfer_number_get(DMA0,DMA_CH5); if(len>12) fifo_write(&g_rxfifo,usart485RX_Buffer,len); dma_memory_address_config(DMA0, DMA_CH5,(uint32_t)usart485RX_Buffer); dma_transfer_number_config(DMA0, DMA_CH5, USART3_RX_SIZE);/* reset DMA_Channel CNT */ dma_channel_enable(DMA0, DMA_CH5);/* enable USART1_RX DMA_Channel */ g_uart485.bRcv = 1; } else if(RESET != usart_interrupt_flag_get(USART1,USART_INT_FLAG_TC)) { // 发送完成中断 usart_interrupt_flag_clear(USART1, USART_INT_FLAG_TC);// usart_flag_clear(USART1, USART_FLAG_TC); g_uart485.bSdFinish = 1; gpio_bit_reset(GPIOA, GPIO_PIN_4); } } void DMA0_Channel6_IRQHandler(void) { if(dma_interrupt_flag_get(DMA0, DMA_CH6, DMA_INT_FLAG_FTF)){ dma_interrupt_flag_clear(DMA0, DMA_CH6, DMA_INT_FLAG_G); //g_uart485.bSdFinish = 1; //gpio_bit_reset(GPIOC, GPIO_PIN_12); usart_interrupt_enable(USART1, USART_INT_TC); // 全能接收完成中断 } } uint8_t usart485TX_Buffer[USART3_TX_SIZE] = {0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08}; uint8_t usart485RX_Buffer[USART3_RX_SIZE] = {0}; uart485Info_t g_uart485; void dam_init_uart_485(void) { dma_parameter_struct dma_init_Usart1_TX; dma_parameter_struct dma_init_Usart1_RX; rcu_periph_clock_enable(RCU_DMA0); dma_deinit(DMA0, DMA_CH5); // RX dma_deinit(DMA0, DMA_CH6); // TX /* initialize DMA0 channel4(USART1_TX) */ dma_init_Usart1_TX.direction = DMA_MEMORY_TO_PERIPHERAL; dma_init_Usart1_TX.memory_addr = (uint32_t)usart485TX_Buffer; dma_init_Usart1_TX.memory_inc = DMA_MEMORY_INCREASE_ENABLE; dma_init_Usart1_TX.memory_width = DMA_MEMORY_WIDTH_8BIT; dma_init_Usart1_TX.number = (uint32_t)USART3_TX_SIZE; dma_init_Usart1_TX.periph_addr = (uint32_t)(&USART_DATA(USART1)); dma_init_Usart1_TX.periph_inc = DMA_PERIPH_INCREASE_DISABLE; dma_init_Usart1_TX.periph_width = DMA_PERIPHERAL_WIDTH_8BIT; dma_init_Usart1_TX.priority = DMA_PRIORITY_LOW; dma_init(DMA0, DMA_CH6, &dma_init_Usart1_TX); dma_circulation_disable(DMA0, DMA_CH6); /* initialize DMA0 channel2(USART1_RX) */ dma_init_Usart1_RX.direction = DMA_PERIPHERAL_TO_MEMORY; dma_init_Usart1_RX.memory_addr = (uint32_t)usart485RX_Buffer; dma_init_Usart1_RX.memory_inc = DMA_MEMORY_INCREASE_ENABLE; dma_init_Usart1_RX.memory_width = DMA_MEMORY_WIDTH_8BIT; dma_init_Usart1_RX.number = (uint32_t)USART3_RX_SIZE; dma_init_Usart1_RX.periph_addr = (uint32_t)(&USART_DATA(USART1)); dma_init_Usart1_RX.periph_inc = DMA_PERIPH_INCREASE_DISABLE; dma_init_Usart1_RX.periph_width = DMA_PERIPHERAL_WIDTH_8BIT; dma_init_Usart1_RX.priority = DMA_PRIORITY_LOW; dma_init(DMA0, DMA_CH5, &dma_init_Usart1_RX); dma_circulation_disable(DMA0, DMA_CH5);//circulate or not makes no difference dma_memory_to_memory_disable(DMA0,DMA_CH5); dma_memory_to_memory_disable(DMA0,DMA_CH6); /* enable all DMA channels you need */ dma_channel_enable(DMA0,DMA_CH5); dma_channel_disable(DMA0,DMA_CH6); } /*------------------------------------------------------------------------------------ * 485初始化 USART1 * -----------------------------------------------------------------------------------*/ void usart_485_dma_init(void) { rcu_periph_clock_enable(RCU_GPIOA);/* enable GPIO clock */ rcu_periph_clock_enable(RCU_AF); rcu_periph_clock_enable(RCU_USART1);/* enable USART clock */ gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_2);/* connect port to USARTx_Tx */ gpio_init(GPIOA, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, GPIO_PIN_3);/* connect port to USARTx_Rx */ //设置rs485芯片，收发模式控制引脚 PA4，低电平接收，高电平发送，初始化为接收模式 gpio_init(GPIOA, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_4); gpio_bit_reset(GPIOA, GPIO_PIN_4); /* USART configure */ usart_deinit(USART1); usart_word_length_set(USART1, USART_WL_8BIT); usart_stop_bit_set(USART1, USART_STB_1BIT); usart_parity_config(USART1, USART_PM_NONE); usart_baudrate_set(USART1, 115200U); usart_hardware_flow_rts_config(USART1, USART_RTS_DISABLE); usart_hardware_flow_cts_config(USART1, USART_CTS_DISABLE); usart_receive_config(USART1, USART_RECEIVE_ENABLE); usart_transmit_config(USART1, USART_TRANSMIT_ENABLE); usart_enable(USART1); /* config USARTx_TX transmit by DMA */ usart_dma_transmit_config(USART1,USART_DENT_ENABLE); usart_dma_receive_config(USART1,USART_DENR_ENABLE); /* USART1 IRQ set */ nvic_irq_enable(USART1_IRQn, 4, 0); usart_interrupt_enable(USART1, USART_INT_FLAG_IDLE); dma_interrupt_enable(DMA0,DMA_CH6,DMA_INT_FTF); /* 使能DAM发送完成中断 */ dma_channel_enable(DMA0, DMA_CH6); nvic_irq_enable(DMA0_Channel6_IRQn, 4, 1); g_uart485.bSdFinish = 1; g_rxfifo.flag = FALSE; g_rxfifo.front = 0; g_rxfifo.rear = 0; } void usart_tx_dma_send(uint32_t usart_periph,uint8_t* data_buffer,uint8_t length) { volatile uint32_t i = 0; if(usart_periph==USART1) { /* Channel disable */ gpio_bit_set(GPIOA, GPIO_PIN_4); dma_interrupt_flag_clear(DMA0, DMA_CH6, DMA_INT_FLAG_FTF); usart_interrupt_flag_clear(USART1,USART_INT_FLAG_TC); usart_flag_clear(USART1,USART_FLAG_TC); for(i=0;i<0xFF;i++); // if(dma_flag_get(DMA0,DMA_FLAG_FTF)!=RESET){ // } dma_channel_disable(DMA0, DMA_CH6); dma_memory_address_config(DMA0, DMA_CH6,(uint32_t)data_buffer); dma_transfer_number_config(DMA0,DMA_CH6,length); /* enable DMA channel to start send */ dma_channel_enable(DMA0, DMA_CH6); usart_dma_transmit_config(USART1,USART_DENT_ENABLE); g_uart485.bRcv = 0; g_uart485.bSdFinish = 0; } }