296 lines
7.0 KiB
C
296 lines
7.0 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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* 2022-05-11 shelton 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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!defined(BSP_USING_UART3) && !defined(BSP_USING_UART4) && \
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!defined(BSP_USING_UART5)
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#error "Please define at least one BSP_USING_UARTx"
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#endif
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struct at32_usart {
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char *name;
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usart_type* usart_x;
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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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#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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#ifdef BSP_USING_UART3
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UART3_INDEX,
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#endif
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#ifdef BSP_USING_UART4
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UART4_INDEX,
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#endif
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#ifdef BSP_USING_UART5
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UART5_INDEX,
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#endif
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};
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static struct at32_usart usart_config[] = {
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#ifdef BSP_USING_UART1
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{ "uart1",
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USART1,
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USART1_IRQn, },
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#endif
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#ifdef BSP_USING_UART2
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{ "uart2",
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USART2,
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USART2_IRQn, },
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#endif
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#ifdef BSP_USING_UART3
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{ "uart3",
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USART3,
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USART3_IRQn, },
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#endif
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#ifdef BSP_USING_UART4
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{ "uart4",
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UART4,
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UART4_IRQn, },
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#endif
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#ifdef BSP_USING_UART5
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{ "uart5",
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UART5,
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UART5_IRQn, },
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#endif
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};
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static rt_err_t at32_configure(struct rt_serial_device *serial,
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struct serial_configure *cfg) {
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struct at32_usart *usart_instance = (struct at32_usart *) serial->parent.user_data;
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usart_data_bit_num_type data_bit;
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usart_stop_bit_num_type stop_bit;
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usart_parity_selection_type parity_mode;
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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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at32_msp_usart_init((void *)usart_instance->usart_x);
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usart_receiver_enable(usart_instance->usart_x, TRUE);
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usart_transmitter_enable(usart_instance->usart_x, TRUE);
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usart_hardware_flow_control_set(usart_instance->usart_x, USART_HARDWARE_FLOW_NONE);
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switch (cfg->data_bits) {
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case DATA_BITS_8:
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data_bit = USART_DATA_8BITS;
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break;
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case DATA_BITS_9:
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data_bit = USART_DATA_9BITS;
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break;
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default:
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data_bit = USART_DATA_8BITS;
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break;
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}
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switch (cfg->stop_bits) {
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case STOP_BITS_1:
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stop_bit = USART_STOP_1_BIT;
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break;
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case STOP_BITS_2:
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stop_bit = USART_STOP_2_BIT;
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break;
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default:
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stop_bit = USART_STOP_1_BIT;
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break;
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}
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switch (cfg->parity) {
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case PARITY_NONE:
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parity_mode = USART_PARITY_NONE;
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break;
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case PARITY_ODD:
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parity_mode = USART_PARITY_ODD;
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break;
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case PARITY_EVEN:
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parity_mode = USART_PARITY_EVEN;
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break;
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default:
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parity_mode = USART_PARITY_NONE;
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break;
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}
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usart_parity_selection_config(usart_instance->usart_x, parity_mode);
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usart_init(usart_instance->usart_x, cfg->baud_rate, data_bit, stop_bit);
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usart_enable(usart_instance->usart_x, TRUE);
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return RT_EOK;
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}
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static rt_err_t at32_control(struct rt_serial_device *serial, int cmd, void *arg) {
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struct at32_usart *usart;
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RT_ASSERT(serial != RT_NULL);
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usart = (struct at32_usart *) serial->parent.user_data;
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RT_ASSERT(usart != RT_NULL);
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switch (cmd) {
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case RT_DEVICE_CTRL_CLR_INT:
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nvic_irq_disable(usart->irqn);
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usart_interrupt_enable(usart->usart_x, USART_RDBF_INT, FALSE);
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break;
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case RT_DEVICE_CTRL_SET_INT:
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nvic_irq_enable(usart->irqn, 2, 1);
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usart_interrupt_enable(usart->usart_x, USART_RDBF_INT, TRUE);
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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 at32_putc(struct rt_serial_device *serial, char ch) {
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struct at32_usart *usart;
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RT_ASSERT(serial != RT_NULL);
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usart = (struct at32_usart *) serial->parent.user_data;
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RT_ASSERT(usart != RT_NULL);
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usart_data_transmit(usart->usart_x, (uint8_t)ch);
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while (usart_flag_get(usart->usart_x, USART_TDC_FLAG) == RESET);
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return 1;
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}
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static int at32_getc(struct rt_serial_device *serial) {
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int ch;
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struct at32_usart *usart;
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RT_ASSERT(serial != RT_NULL);
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usart = (struct at32_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_flag_get(usart->usart_x, USART_RDBF_FLAG) != RESET) {
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ch = usart_data_receive(usart->usart_x) & 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 at32_usart_ops = {
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at32_configure,
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at32_control,
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at32_putc,
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at32_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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struct at32_usart *usart_instance;
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RT_ASSERT(serial != RT_NULL);
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usart_instance = (struct at32_usart *) serial->parent.user_data;
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RT_ASSERT(usart_instance != RT_NULL);
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if (usart_flag_get(usart_instance->usart_x, USART_RDBF_FLAG) != RESET) {
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rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
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usart_flag_clear(usart_instance->usart_x, USART_RDBF_FLAG);
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}
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else
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{
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if (usart_flag_get(usart_instance->usart_x, USART_CTSCF_FLAG) != RESET) {
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usart_flag_clear(usart_instance->usart_x, USART_CTSCF_FLAG);
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}
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if (usart_flag_get(usart_instance->usart_x, USART_BFF_FLAG) != RESET) {
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usart_flag_clear(usart_instance->usart_x, USART_BFF_FLAG);
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}
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if (usart_flag_get(usart_instance->usart_x, USART_TDC_FLAG) != RESET) {
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usart_flag_clear(usart_instance->usart_x, USART_TDC_FLAG);
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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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rt_interrupt_enter();
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usart_isr(&usart_config[UART1_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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rt_interrupt_enter();
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usart_isr(&usart_config[UART2_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_UART3
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void USART3_IRQHandler(void) {
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rt_interrupt_enter();
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usart_isr(&usart_config[UART3_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_UART4
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void UART4_IRQHandler(void) {
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rt_interrupt_enter();
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usart_isr(&usart_config[UART4_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_UART5
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void UART5_IRQHandler(void) {
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rt_interrupt_enter();
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usart_isr(&usart_config[UART5_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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rt_size_t obj_num;
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int index;
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obj_num = sizeof(usart_config) / sizeof(struct at32_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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usart_config[index].serial.ops = &at32_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 |
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RT_DEVICE_FLAG_INT_RX |
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RT_DEVICE_FLAG_INT_TX,
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&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 /* BSP_USING_SERIAL */
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