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/*
* Copyright (c) 2022-2025, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2025-01-22 chasel first version
*/
#include "board.h"
#include <mm32_device.h>
#include <rtdevice.h>
#include "drv_uart.h"
#include <hal_gpio.h>
#include <hal_uart.h>
#include <hal_rcc.h>
#include <hal_misc.h>
/* uart driver */
struct mm32_uart
{
UART_TypeDef *uart;
IRQn_Type irq;
};
static rt_err_t mm32_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
struct mm32_uart *uart;
UART_InitTypeDef UART_InitStructure;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
uart = (struct mm32_uart *)serial->parent.user_data;
UART_InitStructure.BaudRate = cfg->baud_rate;
if (cfg->data_bits == DATA_BITS_8)
UART_InitStructure.WordLength = UART_WordLength_8b;
if (cfg->stop_bits == STOP_BITS_1)
UART_InitStructure.StopBits = UART_StopBits_1;
else if (cfg->stop_bits == STOP_BITS_2)
UART_InitStructure.StopBits = UART_StopBits_2;
UART_InitStructure.Parity = UART_Parity_No;
UART_InitStructure.HWFlowControl = UART_HWFlowControl_None;
UART_InitStructure.Mode = UART_Mode_Rx | UART_Mode_Tx;
UART_Init(uart->uart, &UART_InitStructure);
/* Enable UART */
UART_Cmd(uart->uart, ENABLE);
return RT_EOK;
}
static rt_err_t mm32_uart_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct mm32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct mm32_uart *)serial->parent.user_data;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
NVIC_DisableIRQ(uart->irq);
UART_ITConfig(uart->uart, UART_IT_RX, DISABLE);
break;
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
NVIC_EnableIRQ(uart->irq);
/* enable interrupt */
UART_ITConfig(uart->uart, UART_IT_RX, ENABLE);
break;
}
return RT_EOK;
}
static int mm32_uart_putc(struct rt_serial_device *serial, char c)
{
struct mm32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct mm32_uart *)serial->parent.user_data;
while ((uart->uart->CSR & UART_CSR_TXC_Msk) == 0)
;
uart->uart->TDR = c;
return 1;
}
static int mm32_uart_getc(struct rt_serial_device *serial)
{
int ch;
struct mm32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct mm32_uart *)serial->parent.user_data;
ch = -1;
if (uart->uart->CSR & UART_FLAG_RXAVL)
{
ch = uart->uart->RDR & 0xff;
}
return ch;
}
static const struct rt_uart_ops mm32_uart_ops =
{
mm32_uart_configure,
mm32_uart_control,
mm32_uart_putc,
mm32_uart_getc,
};
#if defined(BSP_USING_UART1)
/* UART1 device driver structure */
static struct mm32_uart uart1;
struct rt_serial_device serial1;
void UART1_IRQHandler(void)
{
struct mm32_uart *uart;
uart = &uart1;
/* enter interrupt */
rt_interrupt_enter();
if (UART_GetITStatus(uart->uart, UART_IT_RX) != RESET)
{
UART_ClearITPendingBit(uart->uart, UART_IT_RX);
rt_hw_serial_isr(&serial1, RT_SERIAL_EVENT_RX_IND);
}
if (UART_GetITStatus(uart->uart, UART_IT_TX) != RESET)
{
/* clear interrupt */
UART_ClearITPendingBit(uart->uart, UART_IT_TX);
}
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART1 */
#if defined(BSP_USING_UART2)
/* UART2 device driver structure */
static struct mm32_uart uart2;
struct rt_serial_device serial2;
void UART2_IRQHandler(void)
{
struct mm32_uart *uart;
uart = &uart2;
/* enter interrupt */
rt_interrupt_enter();
if (UART_GetITStatus(uart->uart, UART_IT_RX) != RESET)
{
UART_ClearITPendingBit(uart->uart, UART_IT_RX);
rt_hw_serial_isr(&serial2, RT_SERIAL_EVENT_RX_IND);
}
if (UART_GetITStatus(uart->uart, UART_IT_TX) != RESET)
{
/* clear interrupt */
UART_ClearITPendingBit(uart->uart, UART_IT_TX);
}
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART2 */
#if defined(BSP_USING_UART3)
/* UART3 device driver structure */
static struct mm32_uart uart3;
struct rt_serial_device serial3;
void UART3_IRQHandler(void)
{
struct mm32_uart *uart;
uart = &uart3;
/* enter interrupt */
rt_interrupt_enter();
if (UART_GetITStatus(uart->uart, UART_IT_RX) != RESET)
{
UART_ClearITPendingBit(uart->uart, UART_IT_RX);
rt_hw_serial_isr(&serial3, RT_SERIAL_EVENT_RX_IND);
}
if (UART_GetITStatus(uart->uart, UART_IT_TX) != RESET)
{
/* clear interrupt */
UART_ClearITPendingBit(uart->uart, UART_IT_TX);
}
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART3 */
int rt_hw_uart_init(void)
{
struct mm32_uart *uart;
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
#ifdef BSP_USING_UART1
mm32_msp_uart_init((void *)UART1);
uart = &uart1;
uart->uart = UART1;
uart->irq = UART1_IRQn;
config.baud_rate = BAUD_RATE_115200;
serial1.ops = &mm32_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 */
#ifdef BSP_USING_UART2
mm32_msp_uart_init((void *)UART2);
uart = &uart2;
uart->uart = UART2;
uart->irq = UART2_IRQn;
config.baud_rate = BAUD_RATE_115200;
serial2.ops = &mm32_uart_ops;
serial2.config = config;
/* register UART2 device */
rt_hw_serial_register(&serial2, "uart2",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif /* BSP_USING_UART2 */
#ifdef BSP_USING_UART3
mm32_msp_uart_init((void *)UART3);
uart = &uart3;
uart->uart = UART3;
uart->irq = UART3_IRQn;
config.baud_rate = BAUD_RATE_115200;
serial3.ops = &mm32_uart_ops;
serial3.config = config;
/* register UART2 device */
rt_hw_serial_register(&serial3, "uart3",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif /* BSP_USING_UART3 */
return 0;
}
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