251 lines
7.2 KiB
C
251 lines
7.2 KiB
C
/*
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* Copyright (c) 2006-2018, 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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* 2019-04-02 henryhuang the first version
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*/
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#include <HAL_device.h>
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#include <rtdevice.h>
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#include "drv_uart.h"
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/* UART1 */
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#define UART1_GPIO_TX GPIO_Pin_9
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#define UART1_GPIO_TX_SOURCE GPIO_PinSource9
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#define UART1_GPIO_RX GPIO_Pin_10
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#define UART1_GPIO_RX_SOURCE GPIO_PinSource10
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#define UART1_GPIO_AF GPIO_AF_1
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#define UART1_GPIO GPIOA
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/* UART2 */
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#define UART2_GPIO_TX GPIO_Pin_2
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#define UART2_GPIO_TX_SOURCE GPIO_PinSource2
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#define UART2_GPIO_RX GPIO_Pin_3
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#define UART2_GPIO_RX_SOURCE GPIO_PinSource3
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#define UART2_GPIO_AF GPIO_AF_1
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#define UART2_GPIO GPIOA
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/* uart driver */
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struct mm32_uart
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{
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UART_TypeDef *uart;
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IRQn_Type irq;
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};
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static rt_err_t mm32_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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struct mm32_uart *uart;
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UART_InitTypeDef UART_InitStructure;
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RT_ASSERT(serial != RT_NULL);
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RT_ASSERT(cfg != RT_NULL);
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uart = (struct mm32_uart *)serial->parent.user_data;
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UART_InitStructure.UART_BaudRate = cfg->baud_rate;
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if (cfg->data_bits == DATA_BITS_8)
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UART_InitStructure.UART_WordLength = UART_WordLength_8b;
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if (cfg->stop_bits == STOP_BITS_1)
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UART_InitStructure.UART_StopBits = UART_StopBits_1;
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else if (cfg->stop_bits == STOP_BITS_2)
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UART_InitStructure.UART_StopBits = UART_StopBits_2;
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UART_InitStructure.UART_Parity = UART_Parity_No;
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UART_InitStructure.UART_HardwareFlowControl = UART_HardwareFlowControl_None;
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UART_InitStructure.UART_Mode = UART_Mode_Rx | UART_Mode_Tx;
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UART_Init(uart->uart, &UART_InitStructure);
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/* Enable UART */
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UART_Cmd(uart->uart, ENABLE);
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return RT_EOK;
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}
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static rt_err_t mm32_uart_control(struct rt_serial_device *serial, int cmd, void *arg)
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{
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struct mm32_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct mm32_uart *)serial->parent.user_data;
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switch (cmd)
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{
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case RT_DEVICE_CTRL_CLR_INT:
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/* disable rx irq */
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NVIC_DisableIRQ(uart->irq);
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UART_ITConfig(uart->uart, UART_IT_RXIEN, 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->irq);
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/* enable interrupt */
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UART_ITConfig(uart->uart, UART_IT_RXIEN, 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 mm32_uart_putc(struct rt_serial_device *serial, char c)
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{
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struct mm32_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct mm32_uart *)serial->parent.user_data;
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while ((uart->uart->CSR & UART_CSR_TXC) == 0);
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uart->uart->TDR = c;
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return 1;
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}
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static int mm32_uart_getc(struct rt_serial_device *serial)
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{
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int ch;
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struct mm32_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct mm32_uart *)serial->parent.user_data;
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ch = -1;
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if (uart->uart->CSR & UART_FLAG_RXAVL)
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{
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ch = uart->uart->RDR & 0xff;
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}
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return ch;
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}
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static const struct rt_uart_ops mm32_uart_ops =
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{
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mm32_uart_configure,
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mm32_uart_control,
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mm32_uart_putc,
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mm32_uart_getc,
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};
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#if defined(BSP_USING_UART1)
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/* UART1 device driver structure */
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static struct mm32_uart uart1;
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struct rt_serial_device serial1;
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void UART1_IRQHandler(void)
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{
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struct mm32_uart *uart;
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uart = &uart1;
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/* enter interrupt */
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rt_interrupt_enter();
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if (UART_GetITStatus(uart->uart, UART_IT_RXIEN) != RESET)
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{
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UART_ClearITPendingBit(uart->uart, UART_IT_RXIEN);
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rt_hw_serial_isr(&serial1, RT_SERIAL_EVENT_RX_IND);
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}
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if (UART_GetITStatus(uart->uart, UART_IT_TXIEN) != RESET)
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{
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/* clear interrupt */
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UART_ClearITPendingBit(uart->uart, UART_IT_TXIEN);
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}
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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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/* UART2 device driver structure */
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static struct mm32_uart uart2;
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struct rt_serial_device serial2;
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void UART2_IRQHandler(void)
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{
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struct mm32_uart *uart;
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uart = &uart2;
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/* enter interrupt */
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rt_interrupt_enter();
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if (UART_GetITStatus(uart->uart, UART_IT_RXIEN) != RESET)
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{
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UART_ClearITPendingBit(uart->uart, UART_IT_RXIEN);
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rt_hw_serial_isr(&serial2, RT_SERIAL_EVENT_RX_IND);
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}
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if (UART_GetITStatus(uart->uart, UART_IT_TXIEN) != RESET)
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{
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/* clear interrupt */
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UART_ClearITPendingBit(uart->uart, UART_IT_TXIEN);
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}
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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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#ifdef BSP_USING_UART1
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static void UART1PINconfigStepA(void)
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{
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/* Enable UART clock */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_UART1, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
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GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);
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}
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static void UART1PINconfigStepB(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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/* Configure USART Rx/tx PIN */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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}
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#endif
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#ifdef BSP_USING_UART2
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static void UART2PINconfigStepA(void)
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{
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/* Enable UART clock */
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART2, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
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GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);
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}
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static void UART2PINconfigStepB(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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/* Configure USART Rx/tx PIN */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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}
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#endif
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int rt_hw_uart_init(void)
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{
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struct mm32_uart *uart;
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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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#ifdef BSP_USING_UART1
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UART1PINconfigStepA();
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uart = &uart1;
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uart->uart = UART1;
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uart->irq = UART1_IRQn;
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config.baud_rate = BAUD_RATE_115200;
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serial1.ops = &mm32_uart_ops;
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serial1.config = config;
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/* register UART1 device */
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rt_hw_serial_register(&serial1, "uart1",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
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uart);
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UART1PINconfigStepB();
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#endif /* BSP_USING_UART1 */
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#ifdef BSP_USING_UART2
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UART2PINconfigStepA();
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uart = &uart2;
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uart->uart = UART2;
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uart->irq = UART2_IRQn;
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config.baud_rate = BAUD_RATE_115200;
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serial2.ops = &mm32_uart_ops;
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serial2.config = config;
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/* register UART2 device */
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rt_hw_serial_register(&serial2, "uart2",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
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uart);
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UART2PINconfigStepB();
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#endif /* BSP_USING_UART2 */
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return 0;
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}
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INIT_BOARD_EXPORT(rt_hw_uart_init);
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