359 lines
9.5 KiB
C
359 lines
9.5 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-01-04 iysheng first version
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*/
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#include <gd32f10x.h>
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#include <drv_usart.h>
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#include <board.h>
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#ifdef RT_USING_SERIAL
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#if !defined(BSP_USING_UART0) && !defined(BSP_USING_UART1) && \
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!defined(BSP_USING_UART2) && !defined(BSP_USING_UART3) && \
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!defined(BSP_USING_UART4)
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#error "Please define at least one UARTx"
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#endif
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#include <rtdevice.h>
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static void uart_isr(struct rt_serial_device *serial);
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#if defined(BSP_USING_UART0)
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struct rt_serial_device serial0;
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void USART0_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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uart_isr(&serial0);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif /* BSP_USING_UART0 */
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#if defined(BSP_USING_UART1)
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struct rt_serial_device serial1;
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void USART1_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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uart_isr(&serial1);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif /* BSP_USING_UART1 */
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#if defined(BSP_USING_UART2)
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struct rt_serial_device serial2;
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void USART2_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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uart_isr(&serial2);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif /* BSP_USING_UART2 */
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#if defined(BSP_USING_UART3)
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struct rt_serial_device serial3;
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void UART3_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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uart_isr(&serial3);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif /* BSP_USING_UART3 */
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#if defined(BSP_USING_UART4)
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struct rt_serial_device serial4;
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void UART4_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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uart_isr(&serial4);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif /* BSP_USING_UART4 */
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static const struct gd32_uart uarts[] = {
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#ifdef BSP_USING_UART0
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{
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USART0, /* uart peripheral index */
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USART0_IRQn, /* uart iqrn */
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RCU_USART0, RCU_GPIOA, RCU_GPIOA, /* periph clock, tx gpio clock, rt gpio clock */
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GPIOA, GPIOA, /* tx port, tx alternate, tx pin */
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GPIO_PIN_9, GPIO_PIN_10, /* rx port, rx alternate, rx pin */
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&serial0,
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"uart0",
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},
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#endif
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#ifdef BSP_USING_UART1
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{
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USART1, /* uart peripheral index */
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USART1_IRQn, /* uart iqrn */
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RCU_USART1, RCU_GPIOA, RCU_GPIOA, /* periph clock, tx gpio clock, rt gpio clock */
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GPIOA, GPIOA, /* tx port, tx alternate, tx pin */
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GPIO_PIN_2, GPIO_PIN_3, /* rx port, rx alternate, rx pin */
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&serial1,
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"uart1",
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},
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#endif
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#ifdef BSP_USING_UART2
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{
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USART2, /* uart peripheral index */
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USART2_IRQn, /* uart iqrn */
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RCU_USART2, RCU_GPIOB, RCU_GPIOB, /* periph clock, tx gpio clock, rt gpio clock */
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GPIOB, GPIOB, /* tx port, tx alternate, tx pin */
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GPIO_PIN_10, GPIO_PIN_11, /* rx port, rx alternate, rx pin */
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&serial2,
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"uart2",
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},
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#endif
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#ifdef BSP_USING_UART3
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{
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UART3, /* uart peripheral index */
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UART3_IRQn, /* uart iqrn */
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RCU_UART3, RCU_GPIOC, RCU_GPIOC, /* periph clock, tx gpio clock, rt gpio clock */
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GPIOC, GPIOC, /* tx port, tx alternate, tx pin */
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GPIO_PIN_10, GPIO_PIN_11, /* rx port, rx alternate, rx pin */
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&serial3,
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"uart3",
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},
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#endif
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#ifdef BSP_USING_UART4
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{
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UART4, /* uart peripheral index */
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UART4_IRQn, /* uart iqrn */
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RCU_UART4, RCU_GPIOC, RCU_GPIOD, /* periph clock, tx gpio clock, rt gpio clock */
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GPIOC, GPIOD, /* tx port, tx alternate, tx pin */
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GPIO_PIN_12, GPIO_PIN_2, /* rx port, rx alternate, rx pin */
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&serial4,
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"uart4",
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},
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#endif
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};
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/**
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* @brief UART MSP Initialization
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* This function configures the hardware resources used in this example:
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* - Peripheral's clock enable
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* - Peripheral's GPIO Configuration
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* - NVIC configuration for UART interrupt request enable
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* @param huart: UART handle pointer
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* @retval None
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*/
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void gd32_uart_gpio_init(struct gd32_uart *uart)
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{
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GPIO_TypeDef *GPIOx;
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GPIO_InitPara GPIO_InitStructure = {0};
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/* enable USART clock */
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rcu_periph_clock_enable(uart->tx_gpio_clk);
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rcu_periph_clock_enable(uart->rx_gpio_clk);
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rcu_periph_clock_enable(uart->per_clk);
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GPIOx = (GPIO_TypeDef *)uart->tx_port;
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GPIO_InitStructure.GPIO_Pin = uart->tx_pin;
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GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AF_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_SPEED_10MHZ;
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GPIO_Init(GPIOx, &GPIO_InitStructure);
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/* TODO 初始化 RX */
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GPIOx = (GPIO_TypeDef *)uart->rx_port;
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GPIO_InitStructure.GPIO_Pin = uart->rx_pin;
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GPIO_InitStructure.GPIO_Mode = GPIO_MODE_IN_FLOATING;
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GPIO_InitStructure.GPIO_Speed = GPIO_SPEED_10MHZ;
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GPIO_Init(GPIOx, &GPIO_InitStructure);
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NVIC_SetPriority(uart->irqn, 0);
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NVIC_EnableIRQ(uart->irqn);
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}
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static rt_err_t gd32_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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struct gd32_uart *uart;
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USART_TypeDef *USARTx;
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USART_InitPara USART_InitParaStruct = {0};
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RT_ASSERT(serial != RT_NULL);
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RT_ASSERT(cfg != RT_NULL);
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uart = (struct gd32_uart *)serial->parent.user_data;
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gd32_uart_gpio_init(uart);
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USARTx = (USART_TypeDef *)uart->uart_periph;
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USART_InitParaStruct.USART_BRR = cfg->baud_rate;
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switch (cfg->data_bits) {
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case DATA_BITS_9:
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USART_InitParaStruct.USART_WL = USART_WL_9B;
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break;
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default:
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USART_InitParaStruct.USART_WL = USART_WL_8B;
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break;
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}
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switch (cfg->stop_bits) {
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case STOP_BITS_2:
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USART_InitParaStruct.USART_STBits = USART_STBITS_2;
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break;
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default:
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USART_InitParaStruct.USART_STBits = USART_STBITS_1;
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break;
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}
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switch (cfg->parity) {
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case PARITY_ODD:
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USART_InitParaStruct.USART_Parity = USART_PARITY_SETODD;
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break;
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case PARITY_EVEN:
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USART_InitParaStruct.USART_Parity = USART_PARITY_SETEVEN;
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break;
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default:
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USART_InitParaStruct.USART_Parity = USART_PARITY_RESET;
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break;
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}
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USART_InitParaStruct.USART_HardwareFlowControl = USART_HARDWAREFLOWCONTROL_NONE;
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USART_InitParaStruct.USART_RxorTx = USART_RXORTX_RX | USART_RXORTX_TX;
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USART_Init(USARTx, &USART_InitParaStruct);
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USART_Enable(USARTx, ENABLE);
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return RT_EOK;
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}
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static rt_err_t gd32_control(struct rt_serial_device *serial, int cmd, void *arg)
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{
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struct gd32_uart *uart;
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USART_TypeDef *USARTx;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct gd32_uart *)serial->parent.user_data;
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USARTx = (USART_TypeDef *)uart->uart_periph;
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switch (cmd) {
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case RT_DEVICE_CTRL_CLR_INT:
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/* disable rx irq */
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NVIC_DisableIRQ(uart->irqn);
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/* disable interrupt */
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USART_INT_Set(USARTx, USART_INT_RBNE, DISABLE);
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break;
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case RT_DEVICE_CTRL_SET_INT:
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/* enable rx irq */
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NVIC_EnableIRQ(uart->irqn);
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/* enable interrupt */
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USART_INT_Set(USARTx, USART_INT_RBNE, ENABLE);
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break;
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}
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return RT_EOK;
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}
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static int gd32_putc(struct rt_serial_device *serial, char ch)
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{
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struct gd32_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct gd32_uart *)serial->parent.user_data;
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USART_DataSend((USART_TypeDef *)uart->uart_periph, ch);
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while ((USART_GetBitState(uart->uart_periph, USART_FLAG_TC) == RESET));
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return 1;
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}
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static int gd32_getc(struct rt_serial_device *serial)
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{
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int ch;
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struct gd32_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct gd32_uart *)serial->parent.user_data;
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ch = -1;
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if (USART_GetBitState(uart->uart_periph, USART_FLAG_RBNE) != RESET)
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ch = USART_DataReceive(uart->uart_periph);
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return ch;
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}
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/**
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* Uart common interrupt process. This need add to uart ISR.
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*
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* @param serial serial device
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*/
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static void uart_isr(struct rt_serial_device *serial)
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{
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struct gd32_uart *uart = (struct gd32_uart *) serial->parent.user_data;
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RT_ASSERT(uart != RT_NULL);
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if ((USART_GetIntBitState((USART_TypeDef *)uart->uart_periph, USART_INT_RBNE) != RESET) &&
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(USART_GetBitState((USART_TypeDef *)uart->uart_periph, USART_FLAG_RBNE) != RESET)) {
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rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
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/* Clear RXNE interrupt flag */
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USART_ClearBitState(uart->uart_periph, USART_FLAG_RBNE);
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}
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}
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static const struct rt_uart_ops gd32_uart_ops = {
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gd32_configure,
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gd32_control,
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gd32_putc,
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gd32_getc,
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};
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int gd32_hw_usart_init(void)
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{
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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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int i;
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for (i = 0; i < sizeof(uarts) / sizeof(uarts[0]); i++) {
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uarts[i].serial->ops = &gd32_uart_ops;
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uarts[i].serial->config = config;
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/* register UART device */
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rt_hw_serial_register(uarts[i].serial,
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uarts[i].device_name,
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
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(void *)&uarts[i]);
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}
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return 0;
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}
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INIT_BOARD_EXPORT(gd32_hw_usart_init);
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#endif
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