/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2022-05-16 shelton first version * 2022-10-15 shelton optimize code */ #include "drv_common.h" #include "drv_usart.h" #ifdef RT_USING_SERIAL #if !defined(BSP_USING_UART1) && !defined(BSP_USING_UART2) && \ !defined(BSP_USING_UART3) && !defined(BSP_USING_UART4) && \ !defined(BSP_USING_UART5) && !defined(BSP_USING_UART6) && \ !defined(BSP_USING_UART7) && !defined(BSP_USING_UART8) #error "Please define at least one BSP_USING_UARTx" #endif struct at32_usart { char *name; usart_type* usart_x; IRQn_Type irqn; struct rt_serial_device serial; }; enum { #ifdef BSP_USING_UART1 UART1_INDEX, #endif #ifdef BSP_USING_UART2 UART2_INDEX, #endif #ifdef BSP_USING_UART3 UART3_INDEX, #endif #ifdef BSP_USING_UART4 UART4_INDEX, #endif #ifdef BSP_USING_UART5 UART5_INDEX, #endif #ifdef BSP_USING_UART6 UART6_INDEX, #endif #ifdef BSP_USING_UART7 UART7_INDEX, #endif #ifdef BSP_USING_UART8 UART8_INDEX, #endif }; static struct at32_usart usart_config[] = { #ifdef BSP_USING_UART1 { "uart1", USART1, USART1_IRQn, }, #endif #ifdef BSP_USING_UART2 { "uart2", USART2, USART2_IRQn, }, #endif #ifdef BSP_USING_UART3 { "uart3", USART3, USART3_IRQn, }, #endif #ifdef BSP_USING_UART4 { "uart4", UART4, UART4_IRQn, }, #endif #ifdef BSP_USING_UART5 { "uart5", UART5, UART5_IRQn, }, #endif #ifdef BSP_USING_UART6 { "uart6", USART6, USART6_IRQn, }, #endif #ifdef BSP_USING_UART7 { "uart7", UART7, UART7_IRQn, }, #endif #ifdef BSP_USING_UART8 { "uart8", UART8, UART8_IRQn, }, #endif }; static rt_err_t at32_configure(struct rt_serial_device *serial, struct serial_configure *cfg) { struct at32_usart *usart_instance = (struct at32_usart *) serial->parent.user_data; usart_data_bit_num_type data_bit; usart_stop_bit_num_type stop_bit; usart_parity_selection_type parity_mode; RT_ASSERT(serial != RT_NULL); RT_ASSERT(cfg != RT_NULL); RT_ASSERT(usart_instance != RT_NULL); at32_msp_usart_init((void *)usart_instance->usart_x); usart_receiver_enable(usart_instance->usart_x, TRUE); usart_transmitter_enable(usart_instance->usart_x, TRUE); usart_hardware_flow_control_set(usart_instance->usart_x, USART_HARDWARE_FLOW_NONE); switch (cfg->data_bits) { case DATA_BITS_8: data_bit = USART_DATA_8BITS; break; case DATA_BITS_9: data_bit = USART_DATA_9BITS; break; default: data_bit = USART_DATA_8BITS; break; } switch (cfg->stop_bits) { case STOP_BITS_1: stop_bit = USART_STOP_1_BIT; break; case STOP_BITS_2: stop_bit = USART_STOP_2_BIT; break; default: stop_bit = USART_STOP_1_BIT; break; } switch (cfg->parity) { case PARITY_NONE: parity_mode = USART_PARITY_NONE; break; case PARITY_ODD: parity_mode = USART_PARITY_ODD; break; case PARITY_EVEN: parity_mode = USART_PARITY_EVEN; break; default: parity_mode = USART_PARITY_NONE; break; } usart_parity_selection_config(usart_instance->usart_x, parity_mode); usart_init(usart_instance->usart_x, cfg->baud_rate, data_bit, stop_bit); usart_enable(usart_instance->usart_x, TRUE); return RT_EOK; } static rt_err_t at32_control(struct rt_serial_device *serial, int cmd, void *arg) { struct at32_usart *usart; RT_ASSERT(serial != RT_NULL); usart = (struct at32_usart *) serial->parent.user_data; RT_ASSERT(usart != RT_NULL); switch (cmd) { case RT_DEVICE_CTRL_CLR_INT: nvic_irq_disable(usart->irqn); usart_interrupt_enable(usart->usart_x, USART_RDBF_INT, FALSE); break; case RT_DEVICE_CTRL_SET_INT: nvic_irq_enable(usart->irqn, 2, 1); usart_interrupt_enable(usart->usart_x, USART_RDBF_INT, TRUE); break; } return RT_EOK; } static int at32_putc(struct rt_serial_device *serial, char ch) { struct at32_usart *usart; RT_ASSERT(serial != RT_NULL); usart = (struct at32_usart *) serial->parent.user_data; RT_ASSERT(usart != RT_NULL); usart_data_transmit(usart->usart_x, (uint8_t)ch); while (usart_flag_get(usart->usart_x, USART_TDC_FLAG) == RESET); return 1; } static int at32_getc(struct rt_serial_device *serial) { int ch; struct at32_usart *usart; RT_ASSERT(serial != RT_NULL); usart = (struct at32_usart *) serial->parent.user_data; RT_ASSERT(usart != RT_NULL); ch = -1; if (usart_flag_get(usart->usart_x, USART_RDBF_FLAG) != RESET) { ch = usart_data_receive(usart->usart_x) & 0xff; } return ch; } static const struct rt_uart_ops at32_usart_ops = { at32_configure, at32_control, at32_putc, at32_getc, RT_NULL }; static void usart_isr(struct rt_serial_device *serial) { struct at32_usart *usart_instance; RT_ASSERT(serial != RT_NULL); usart_instance = (struct at32_usart *) serial->parent.user_data; RT_ASSERT(usart_instance != RT_NULL); if (usart_flag_get(usart_instance->usart_x, USART_RDBF_FLAG) != RESET) { rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND); } else { if (usart_flag_get(usart_instance->usart_x, USART_CTSCF_FLAG) != RESET) { usart_flag_clear(usart_instance->usart_x, USART_CTSCF_FLAG); } if (usart_flag_get(usart_instance->usart_x, USART_BFF_FLAG) != RESET) { usart_flag_clear(usart_instance->usart_x, USART_BFF_FLAG); } if (usart_flag_get(usart_instance->usart_x, USART_TDC_FLAG) != RESET) { usart_flag_clear(usart_instance->usart_x, USART_TDC_FLAG); } } } #ifdef BSP_USING_UART1 void USART1_IRQHandler(void) { rt_interrupt_enter(); usart_isr(&usart_config[UART1_INDEX].serial); rt_interrupt_leave(); } #endif #ifdef BSP_USING_UART2 void USART2_IRQHandler(void) { rt_interrupt_enter(); usart_isr(&usart_config[UART2_INDEX].serial); rt_interrupt_leave(); } #endif #ifdef BSP_USING_UART3 void USART3_IRQHandler(void) { rt_interrupt_enter(); usart_isr(&usart_config[UART3_INDEX].serial); rt_interrupt_leave(); } #endif #ifdef BSP_USING_UART4 void UART4_IRQHandler(void) { rt_interrupt_enter(); usart_isr(&usart_config[UART4_INDEX].serial); rt_interrupt_leave(); } #endif #ifdef BSP_USING_UART5 void UART5_IRQHandler(void) { rt_interrupt_enter(); usart_isr(&usart_config[UART5_INDEX].serial); rt_interrupt_leave(); } #endif #ifdef BSP_USING_UART6 void USART6_IRQHandler(void) { rt_interrupt_enter(); usart_isr(&usart_config[UART6_INDEX].serial); rt_interrupt_leave(); } #endif #ifdef BSP_USING_UART7 void UART7_IRQHandler(void) { rt_interrupt_enter(); usart_isr(&usart_config[UART7_INDEX].serial); rt_interrupt_leave(); } #endif #ifdef BSP_USING_UART8 void UART8_IRQHandler(void) { rt_interrupt_enter(); usart_isr(&usart_config[UART8_INDEX].serial); rt_interrupt_leave(); } #endif int rt_hw_usart_init(void) { rt_size_t obj_num; int index; obj_num = sizeof(usart_config) / sizeof(struct at32_usart); struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT; rt_err_t result = 0; for (index = 0; index < obj_num; index++) { usart_config[index].serial.ops = &at32_usart_ops; usart_config[index].serial.config = config; /* register uart device */ result = rt_hw_serial_register(&usart_config[index].serial, usart_config[index].name, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX, &usart_config[index]); RT_ASSERT(result == RT_EOK); } return result; } #endif /* BSP_USING_SERIAL */