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rt-thread-official/bsp/at32/libraries/rt_drivers/drv_usart.c

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/*
* 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 */
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