/* * Copyright (c) 2006-2021, YICHIP Technology Co.,Ltd. * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2021-09-09 WSY first version */ #include #include #include struct yc3121_uart { UART_TypeDef uart; IRQn_Type irq; }; static rt_err_t yc3121_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg) { struct yc3121_uart *uart; UART_InitTypeDef UART_initStruct; RT_ASSERT(serial != RT_NULL); RT_ASSERT(cfg != RT_NULL); uart = (struct yc3121_uart *)serial->parent.user_data; NVIC_DisableIRQ(uart->irq); UART_initStruct.BaudRate = cfg->baud_rate; UART_initStruct.FlowCtrl = FlowCtrl_None ; UART_initStruct.Mode = Mode_duplex; switch (cfg->data_bits) { case DATA_BITS_9: UART_initStruct.DataBits = Databits_9b; break; default: UART_initStruct.DataBits = Databits_8b; break; } switch (cfg->stop_bits) { case STOP_BITS_2: UART_initStruct.StopBits = StopBits_2; break; default: UART_initStruct.StopBits = StopBits_1; break; } switch (cfg->parity) { case PARITY_ODD: UART_initStruct.Parity = Parity_Odd; break; case PARITY_EVEN: UART_initStruct.Parity = Parity_Even; break; default: UART_initStruct.Parity = Parity_None; break; } UART_Init(uart->uart, &UART_initStruct); return RT_EOK; } static rt_err_t yc3121_uart_control(struct rt_serial_device *serial, int cmd, void *arg) { struct yc3121_uart *uart; RT_ASSERT(serial != RT_NULL); uart = (struct yc3121_uart *)serial->parent.user_data; switch (cmd) { case RT_DEVICE_CTRL_CLR_INT: /* disable rx irq */ UART_SetRxITNum(uart->uart, 0); NVIC_DisableIRQ(uart->irq); break; case RT_DEVICE_CTRL_SET_INT: /* enable rx irq */ UART_SetRxITNum(uart->uart, 1); UART_ITConfig(uart->uart, UART_IT_RX, ENABLE); NVIC_EnableIRQ(uart->irq); break; } return RT_EOK; } static int yc3121_uart_putc(struct rt_serial_device *serial, char c) { struct yc3121_uart *uart; RT_ASSERT(serial != RT_NULL); uart = (struct yc3121_uart *)serial->parent.user_data; while (UART_IsUARTBusy(uart->uart)); UART_SendData(uart->uart, c); return 1; } static int yc3121_uart_getc(struct rt_serial_device *serial) { int ch; struct yc3121_uart *uart; RT_ASSERT(serial != RT_NULL); uart = (struct yc3121_uart *)serial->parent.user_data; ch = -1; if (UART_ReceiveDataLen(uart->uart) != 0) { ch = UART_ReceiveData(uart->uart); } return ch; } static const struct rt_uart_ops yc3121_uart_ops = { yc3121_uart_configure, yc3121_uart_control, yc3121_uart_putc, yc3121_uart_getc, }; #if defined(BSP_USING_UART0) /* UART0 device driver structure */ static struct yc3121_uart uart0; static struct rt_serial_device serial0; void UART0_IRQHandler(void) { /* enter interrupt */ rt_interrupt_enter(); /* UART in mode Receiver */ if (UART_GetITIdentity(uart0.uart) == UART_IT_RX) { rt_hw_serial_isr(&serial0, RT_SERIAL_EVENT_RX_IND); } /* leave interrupt */ rt_interrupt_leave(); } #endif /* BSP_USING_UART0 */ #if defined(BSP_USING_UART1) /* UART1 device driver structure */ static struct yc3121_uart uart1; static struct rt_serial_device serial1; void UART1_IRQHandler(void) { /* enter interrupt */ rt_interrupt_enter(); /* UART in mode Receiver */ if (UART_GetITIdentity(uart1.uart) == UART_IT_RX) { rt_hw_serial_isr(&serial1, RT_SERIAL_EVENT_RX_IND); } /* leave interrupt */ rt_interrupt_leave(); } #endif /* BSP_USING_UART1 */ int rt_hw_uart_init(void) { struct yc3121_uart *uart; struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT; #ifdef BSP_USING_UART0 GPIO_CONFIG(1) = UART0_TXD; GPIO_CONFIG(0) = UART0_RXD; uart = &uart0; uart->uart = UART0; uart->irq = UART0_IRQn; serial0.ops = &yc3121_uart_ops; serial0.config = config; /* register UART0 device */ rt_hw_serial_register(&serial0, RT_CONSOLE_DEVICE_NAME, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, uart); #endif /* BSP_USING_UART0 */ #ifdef BSP_USING_UART1 GPIO_CONFIG(1) = UART1_TXD; GPIO_CONFIG(0) = UART1_RXD; uart = &uart1; uart->uart = UART1; uart->irq = UART1_IRQn; serial1.ops = &yc3121_uart_ops; serial1.config = config; /* register UART1 device */ rt_hw_serial_register(&serial1, "uart1", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, uart); #endif /* BSP_USING_UART1 */ return 0; }