296 lines
7.2 KiB
C
296 lines
7.2 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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* 2021-08-10 charlown first version
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*/
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#include <rtthread.h>
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#include <rtdevice.h>
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#include "board.h"
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#include "drv_uart.h"
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#include "ch32f10x_usart.h"
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#include "ch32f10x_misc.h"
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#ifdef BSP_USING_UART
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#ifndef ITEM_NUM
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#define ITEM_NUM(items) sizeof(items) / sizeof(items[0])
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#endif
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struct usart_device
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{
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struct rt_serial_device parent;
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char *name;
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USART_TypeDef *periph;
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IRQn_Type irqn;
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};
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#ifdef BSP_USING_UART1
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static struct usart_device usart_device1 =
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{
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.name = "uart1",
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.periph = USART1,
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.irqn = USART1_IRQn,
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};
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#endif
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#ifdef BSP_USING_UART2
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static struct usart_device usart_device2 =
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{
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.name = "uart2",
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.periph = USART2,
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.irqn = USART2_IRQn,
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};
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#endif
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#ifdef BSP_USING_UART3
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static struct usart_device usart_device3 =
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{
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.name = "uart3",
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.periph = USART3,
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.irqn = USART3_IRQn,
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};
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#endif
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static rt_err_t ch32f1_usart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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struct usart_device *usart_dev;
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USART_InitTypeDef USART_InitStructure;
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RT_ASSERT(serial != RT_NULL);
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RT_ASSERT(cfg != RT_NULL);
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usart_dev = (struct usart_device *)serial;
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RT_ASSERT(usart_dev != RT_NULL);
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ch32f1_usart_clock_and_io_init(usart_dev->periph);
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USART_StructInit(&USART_InitStructure);
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USART_InitStructure.USART_BaudRate = cfg->baud_rate;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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switch (cfg->data_bits)
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{
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case DATA_BITS_8:
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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break;
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case DATA_BITS_9:
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USART_InitStructure.USART_WordLength = USART_WordLength_9b;
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break;
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default:
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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break;
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}
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switch (cfg->stop_bits)
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{
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case STOP_BITS_1:
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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break;
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case STOP_BITS_2:
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USART_InitStructure.USART_StopBits = USART_StopBits_2;
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break;
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default:
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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break;
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}
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switch (cfg->parity)
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{
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case PARITY_NONE:
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USART_InitStructure.USART_Parity = USART_Parity_No;
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break;
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case PARITY_ODD:
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USART_InitStructure.USART_Parity = USART_Parity_Odd;
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break;
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case PARITY_EVEN:
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USART_InitStructure.USART_Parity = USART_Parity_Even;
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break;
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default:
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USART_InitStructure.USART_Parity = USART_Parity_No;
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break;
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}
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USART_Init(usart_dev->periph, &USART_InitStructure);
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USART_Cmd(usart_dev->periph, ENABLE);
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return RT_EOK;
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}
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static rt_err_t ch32f1_usart_control(struct rt_serial_device *serial, int cmd, void *arg)
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{
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struct usart_device *usart_dev;
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NVIC_InitTypeDef NVIC_InitStruct;
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RT_ASSERT(serial != RT_NULL);
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usart_dev = (struct usart_device *)serial;
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RT_ASSERT(usart_dev != RT_NULL);
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NVIC_InitStruct.NVIC_IRQChannel = usart_dev->irqn;
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NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 2;
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NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1;
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switch (cmd)
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{
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case RT_DEVICE_CTRL_CLR_INT:
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NVIC_InitStruct.NVIC_IRQChannelCmd = DISABLE;
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NVIC_Init(&NVIC_InitStruct);
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USART_ITConfig(usart_dev->periph, USART_IT_RXNE, DISABLE);
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break;
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case RT_DEVICE_CTRL_SET_INT:
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NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStruct);
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USART_ITConfig(usart_dev->periph, USART_IT_RXNE, 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 ch32f1_usart_putc(struct rt_serial_device *serial, char ch)
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{
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struct usart_device *usart_dev;
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RT_ASSERT(serial != RT_NULL);
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usart_dev = (struct usart_device *)serial;
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RT_ASSERT(usart_dev != RT_NULL);
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USART_SendData(usart_dev->periph, (uint8_t)ch);
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while (USART_GetFlagStatus(usart_dev->periph, USART_FLAG_TXE) == RESET)
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;
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return 1;
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}
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static int ch32f1_usart_getc(struct rt_serial_device *serial)
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{
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struct usart_device *usart_dev;
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int ch;
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RT_ASSERT(serial != RT_NULL);
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usart_dev = (struct usart_device *)serial;
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RT_ASSERT(usart_dev != RT_NULL);
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ch = -1;
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if (RESET != USART_GetFlagStatus(usart_dev->periph, USART_FLAG_RXNE))
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{
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ch = USART_ReceiveData(usart_dev->periph) & 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 usart_ops = {
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.configure = ch32f1_usart_configure,
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.control = ch32f1_usart_control,
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.putc = ch32f1_usart_putc,
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.getc = ch32f1_usart_getc,
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.dma_transmit = RT_NULL};
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static void usart_isr(struct usart_device *usart_dev)
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{
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RT_ASSERT(usart_dev != RT_NULL);
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if ((USART_GetITStatus(usart_dev->periph, USART_IT_RXNE) != RESET) && (RESET != USART_GetFlagStatus(usart_dev->periph, USART_FLAG_RXNE)))
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{
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rt_hw_serial_isr(&usart_dev->parent, RT_SERIAL_EVENT_RX_IND);
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USART_ClearITPendingBit(usart_dev->periph, USART_IT_RXNE);
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USART_ClearFlag(usart_dev->periph, USART_FLAG_RXNE);
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}
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else
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{
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if (USART_GetFlagStatus(usart_dev->periph, USART_FLAG_CTS) != RESET)
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{
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USART_ClearFlag(usart_dev->periph, USART_FLAG_CTS);
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}
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if (USART_GetFlagStatus(usart_dev->periph, USART_FLAG_LBD) != RESET)
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{
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USART_ClearFlag(usart_dev->periph, USART_FLAG_LBD);
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}
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if (USART_GetFlagStatus(usart_dev->periph, USART_FLAG_TC) != RESET)
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{
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USART_ClearFlag(usart_dev->periph, USART_FLAG_TC);
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}
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}
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}
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#ifdef BSP_USING_UART1
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void USART1_IRQHandler(void)
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{
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rt_interrupt_enter();
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usart_isr(&usart_device1);
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rt_interrupt_leave();
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}
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#endif
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#ifdef BSP_USING_UART2
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void USART2_IRQHandler(void)
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{
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rt_interrupt_enter();
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usart_isr(&usart_device2);
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rt_interrupt_leave();
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}
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#endif
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#ifdef BSP_USING_UART3
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void USART3_IRQHandler(void)
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{
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rt_interrupt_enter();
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usart_isr(&usart_device3);
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rt_interrupt_leave();
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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 serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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#ifdef BSP_USING_UART1
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usart_device1.parent.ops = &usart_ops;
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usart_device1.parent.config = config;
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rt_hw_serial_register(&usart_device1.parent, usart_device1.name,
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
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RT_NULL);
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#endif
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#ifdef BSP_USING_UART2
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usart_device2.parent.ops = &usart_ops;
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usart_device2.parent.config = config;
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rt_hw_serial_register(&usart_device2.parent, usart_device2.name,
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
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RT_NULL);
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#endif
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#ifdef BSP_USING_UART3
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usart_device3.parent.ops = &usart_ops;
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usart_device3.parent.config = config;
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rt_hw_serial_register(&usart_device3.parent, usart_device3.name,
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
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RT_NULL);
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#endif
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return RT_EOK;
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}
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#endif /* BSP_USING_UART */
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