297 lines
7.0 KiB
C
297 lines
7.0 KiB
C
/*
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* Copyright (c) 2006-2022, 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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* 2020-08-20 Abbcc 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 apm32_usart
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{
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const char *name;
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USART_T *usartx;
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IRQn_Type irq_type;
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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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UART1_INDEX,
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#endif
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#ifdef BSP_USING_UART2
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UART2_INDEX,
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#endif
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};
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static struct apm32_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 _uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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USART_Config_T USART_ConfigStruct;
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RT_ASSERT(serial != RT_NULL);
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RT_ASSERT(cfg != RT_NULL);
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struct apm32_usart *usart_instance = (struct apm32_usart *) serial->parent.user_data;
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apm32_usart_init();
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USART_ConfigStruct.baudRate = cfg->baud_rate;;
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USART_ConfigStruct.hardwareFlow = USART_HARDWARE_FLOW_NONE;
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USART_ConfigStruct.mode = USART_MODE_TX_RX;
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USART_ConfigStruct.parity = USART_PARITY_NONE;
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switch (cfg->data_bits)
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{
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case DATA_BITS_8:
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if (cfg->parity == PARITY_ODD || cfg->parity == PARITY_EVEN)
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USART_ConfigStruct.wordLength = USART_WORD_LEN_9B;
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else
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USART_ConfigStruct.wordLength = USART_WORD_LEN_8B;
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break;
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case DATA_BITS_9:
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USART_ConfigStruct.wordLength = USART_WORD_LEN_9B;
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break;
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default:
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USART_ConfigStruct.wordLength = USART_WORD_LEN_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_ConfigStruct.stopBits = USART_STOP_BIT_1;
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break;
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case STOP_BITS_2:
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USART_ConfigStruct.stopBits = USART_STOP_BIT_2;
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break;
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default:
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USART_ConfigStruct.stopBits = USART_STOP_BIT_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_ConfigStruct.parity = USART_PARITY_NONE;
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break;
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case PARITY_ODD:
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USART_ConfigStruct.parity = USART_PARITY_ODD;
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break;
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case PARITY_EVEN:
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USART_ConfigStruct.parity = USART_PARITY_EVEN;
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break;
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default:
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USART_ConfigStruct.parity = USART_PARITY_NONE;
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break;
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}
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USART_Config(usart_instance->usartx, &USART_ConfigStruct);
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USART_Enable(usart_instance->usartx);
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return RT_EOK;
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}
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static rt_err_t _uart_control(struct rt_serial_device *serial, int cmd, void *arg)
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{
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struct apm32_usart *usart;
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RT_ASSERT(serial != RT_NULL);
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usart = (struct apm32_usart *) serial->parent.user_data;
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RT_ASSERT(usart != RT_NULL);
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switch (cmd)
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{
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/* disable interrupt */
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case RT_DEVICE_CTRL_CLR_INT:
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/* disable rx irq */
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NVIC_DisableIRQRequest(usart->irq_type);
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/* disable interrupt */
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USART_DisableInterrupt(usart->usartx, USART_INT_RXBNE);
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break;
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/* enable interrupt */
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case RT_DEVICE_CTRL_SET_INT:
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/* enable rx irq */
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NVIC_EnableIRQRequest(usart->irq_type, 1, 0);
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/* enable interrupt */
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USART_EnableInterrupt(usart->usartx, USART_INT_RXBNE);
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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 _uart_putc(struct rt_serial_device *serial, char c)
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{
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struct apm32_usart *usart;
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RT_ASSERT(serial != RT_NULL);
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usart = (struct apm32_usart *) serial->parent.user_data;
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RT_ASSERT(usart != RT_NULL);
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USART_TxData(usart->usartx, (uint8_t) c);
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while (USART_ReadStatusFlag(usart->usartx, USART_FLAG_TXC) == RESET);
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return 1;
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}
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static int _uart_getc(struct rt_serial_device *serial)
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{
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int ch;
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struct apm32_usart *usart;
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RT_ASSERT(serial != RT_NULL);
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usart = (struct apm32_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 (USART_ReadStatusFlag(usart->usartx, USART_FLAG_RXBNE) != RESET)
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{
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ch = USART_RxData(usart->usartx);
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}
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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 usart ISR.
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*
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* @param serial serial device
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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 apm32_usart *usart;
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RT_ASSERT(serial != RT_NULL);
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RT_ASSERT(serial != RT_NULL);
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usart = (struct apm32_usart *) serial->parent.user_data;
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RT_ASSERT(usart != RT_NULL);
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/* UART in mode Receiver */
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if ((USART_ReadStatusFlag(usart->usartx, USART_FLAG_RXBNE) != RESET) &&
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(USART_ReadIntFlag(usart->usartx, USART_INT_RXBNE) != RESET))
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{
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rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
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USART_ClearStatusFlag(usart->usartx, USART_FLAG_RXBNE);
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USART_ClearIntFlag(usart->usartx, USART_INT_RXBNE);
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}
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else
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{
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if (USART_ReadStatusFlag(usart->usartx, USART_FLAG_CTS) != RESET)
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{
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USART_ClearStatusFlag(usart->usartx, USART_FLAG_CTS);
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}
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if (USART_ReadStatusFlag(usart->usartx, USART_FLAG_LBD) != RESET)
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{
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USART_ClearStatusFlag(usart->usartx, USART_FLAG_LBD);
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}
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if (USART_ReadStatusFlag(usart->usartx, USART_FLAG_TXBE) != RESET)
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{
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USART_ClearStatusFlag(usart->usartx, USART_FLAG_TXBE);
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}
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}
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}
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#if defined(BSP_USING_UART1)
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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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usart_isr(&(usart_config[UART1_INDEX].serial));
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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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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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usart_isr(&(usart_config[UART2_INDEX].serial));
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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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static const struct rt_uart_ops apm32_usart_ops =
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{
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.configure = _uart_configure,
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.control = _uart_control,
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.putc = _uart_putc,
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.getc = _uart_getc,
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.dma_transmit = RT_NULL
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};
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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 apm32_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 = &apm32_usart_ops;
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usart_config[index].serial.config = config;
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/* register USART 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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#endif /* RT_USING_SERIAL */
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