275 lines
6.7 KiB
C
275 lines
6.7 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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* 2021-08-15 Jonas first version
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*/
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#include <board.h>
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#include "drv_usart.h"
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#ifdef RT_USING_SERIAL
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#if !defined(BSP_USING_UART1) && !defined(BSP_USING_UART2)
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#error "Please define at least one BSP_USING_UARTx"
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/* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
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#endif
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struct hk32_usart
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{
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char *name;
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USART_TypeDef *usartx;
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IRQn_Type irqn;
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struct rt_serial_device serial;
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};
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enum
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{
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#ifdef BSP_USING_UART1
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USART1_INDEX,
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#endif
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#ifdef BSP_USING_UART2
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USART2_INDEX,
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#endif
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};
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static struct hk32_usart usart_config[] =
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{
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#ifdef BSP_USING_UART1
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{
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"uart1",
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USART1,
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USART1_IRQn,
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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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"uart2",
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USART2,
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USART2_IRQn,
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},
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#endif
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};
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static rt_err_t hk32_configure(struct rt_serial_device *serial,
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struct serial_configure *cfg)
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{
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struct hk32_usart *usart_instance = (struct hk32_usart *) serial->parent.user_data;
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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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RT_ASSERT(usart_instance != RT_NULL);
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hk32_msp_usart_init((void *)usart_instance->usartx);
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USART_StructInit(&USART_InitStructure);
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USART_DeInit(usart_instance->usartx);
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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_instance->usartx, &USART_InitStructure);
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USART_Cmd(usart_instance->usartx, ENABLE);
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return RT_EOK;
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}
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static rt_err_t hk32_control(struct rt_serial_device *serial, int cmd,
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void *arg)
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{
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struct hk32_usart *usart;
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NVIC_InitTypeDef NVIC_InitStruct;
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RT_ASSERT(serial != RT_NULL);
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usart = (struct hk32_usart *) serial->parent.user_data;
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RT_ASSERT(usart != RT_NULL);
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NVIC_InitStruct.NVIC_IRQChannel = usart->irqn;
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NVIC_InitStruct.NVIC_IRQChannelPriority = 2;
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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->usartx, 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->usartx, 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 hk32_putc(struct rt_serial_device *serial, char ch)
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{
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struct hk32_usart *usart;
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RT_ASSERT(serial != RT_NULL);
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usart = (struct hk32_usart *) serial->parent.user_data;
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RT_ASSERT(usart != RT_NULL);
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USART_SendData(usart->usartx, (uint8_t) ch);
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while (USART_GetFlagStatus(usart->usartx, USART_FLAG_TXE) == RESET);
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return 1;
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}
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static int hk32_getc(struct rt_serial_device *serial)
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{
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int ch;
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struct hk32_usart *usart;
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RT_ASSERT(serial != RT_NULL);
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usart = (struct hk32_usart *) serial->parent.user_data;
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RT_ASSERT(usart != RT_NULL);
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ch = -1;
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if (RESET != USART_GetFlagStatus(usart->usartx, USART_FLAG_RXNE))
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{
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ch = USART_ReceiveData(usart->usartx) & 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 hk32_usart_ops =
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{
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hk32_configure,
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hk32_control,
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hk32_putc,
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hk32_getc,
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RT_NULL
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};
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static void usart_isr(struct rt_serial_device *serial)
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{
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struct hk32_usart *usart_instance;
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RT_ASSERT(serial != RT_NULL);
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usart_instance = (struct hk32_usart *) serial->parent.user_data;
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RT_ASSERT(usart_instance != RT_NULL);
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if ((USART_GetITStatus(usart_instance->usartx, USART_IT_RXNE) != RESET) \
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&& (RESET != USART_GetFlagStatus(usart_instance->usartx, USART_FLAG_RXNE)))
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{
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rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
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USART_ClearITPendingBit(usart_instance->usartx, USART_IT_RXNE);
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USART_ClearFlag(usart_instance->usartx, USART_FLAG_RXNE);
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}
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else
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{
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if (USART_GetFlagStatus(usart_instance->usartx, USART_FLAG_CTS) != RESET)
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{
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USART_ClearFlag(usart_instance->usartx, USART_FLAG_CTS);
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}
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if (USART_GetFlagStatus(usart_instance->usartx, USART_FLAG_TC) != RESET)
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{
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USART_ClearFlag(usart_instance->usartx, 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_config[USART1_INDEX].serial);
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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_config[USART2_INDEX].serial);
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rt_interrupt_leave();
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}
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#endif
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int rt_hw_usart_init(void)
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{
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rt_size_t obj_num;
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int index;
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obj_num = sizeof(usart_config) / sizeof(struct hk32_usart);
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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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rt_err_t result = 0;
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for (index = 0; index < obj_num; index++)
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{
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usart_config[index].serial.ops = &hk32_usart_ops;
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usart_config[index].serial.config = config;
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/* register UART device */
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result = rt_hw_serial_register(&usart_config[index].serial,
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usart_config[index].name,
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX
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| RT_DEVICE_FLAG_INT_TX, &usart_config[index]);
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RT_ASSERT(result == RT_EOK);
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}
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return result;
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}
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INIT_BOARD_EXPORT(rt_hw_usart_init);
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#endif /* BSP_USING_SERIAL */
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