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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-08-15 Jonas first version
*/
#include <board.h>
#include "drv_usart.h"
#ifdef RT_USING_SERIAL
#if !defined(BSP_USING_UART1) && !defined(BSP_USING_UART2)
#error "Please define at least one BSP_USING_UARTx"
/* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
#endif
struct hk32_usart
{
char *name;
USART_TypeDef *usartx;
IRQn_Type irqn;
struct rt_serial_device serial;
};
enum
{
#ifdef BSP_USING_UART1
USART1_INDEX,
#endif
#ifdef BSP_USING_UART2
USART2_INDEX,
#endif
};
static struct hk32_usart usart_config[] =
{
#ifdef BSP_USING_UART1
{
"uart1",
USART1,
USART1_IRQn,
},
#endif
#ifdef BSP_USING_UART2
{
"uart2",
USART2,
USART2_IRQn,
},
#endif
};
static rt_err_t hk32_configure(struct rt_serial_device *serial,
struct serial_configure *cfg)
{
struct hk32_usart *usart_instance = (struct hk32_usart *) serial->parent.user_data;
USART_InitTypeDef USART_InitStructure;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
RT_ASSERT(usart_instance != RT_NULL);
hk32_msp_usart_init((void *)usart_instance->usartx);
USART_StructInit(&USART_InitStructure);
USART_DeInit(usart_instance->usartx);
USART_InitStructure.USART_BaudRate = cfg->baud_rate;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
switch (cfg->data_bits)
{
case DATA_BITS_8:
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
break;
case DATA_BITS_9:
USART_InitStructure.USART_WordLength = USART_WordLength_9b;
break;
default:
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
break;
}
switch (cfg->stop_bits)
{
case STOP_BITS_1:
USART_InitStructure.USART_StopBits = USART_StopBits_1;
break;
case STOP_BITS_2:
USART_InitStructure.USART_StopBits = USART_StopBits_2;
break;
default:
USART_InitStructure.USART_StopBits = USART_StopBits_1;
break;
}
switch (cfg->parity)
{
case PARITY_NONE:
USART_InitStructure.USART_Parity = USART_Parity_No;
break;
case PARITY_ODD:
USART_InitStructure.USART_Parity = USART_Parity_Odd;
break;
case PARITY_EVEN:
USART_InitStructure.USART_Parity = USART_Parity_Even;
break;
default:
USART_InitStructure.USART_Parity = USART_Parity_No;
break;
}
USART_Init(usart_instance->usartx, &USART_InitStructure);
USART_Cmd(usart_instance->usartx, ENABLE);
return RT_EOK;
}
static rt_err_t hk32_control(struct rt_serial_device *serial, int cmd,
void *arg)
{
struct hk32_usart *usart;
NVIC_InitTypeDef NVIC_InitStruct;
RT_ASSERT(serial != RT_NULL);
usart = (struct hk32_usart *) serial->parent.user_data;
RT_ASSERT(usart != RT_NULL);
NVIC_InitStruct.NVIC_IRQChannel = usart->irqn;
NVIC_InitStruct.NVIC_IRQChannelPriority = 2;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
NVIC_InitStruct.NVIC_IRQChannelCmd = DISABLE;
NVIC_Init(&NVIC_InitStruct);
USART_ITConfig(usart->usartx, USART_IT_RXNE, DISABLE);
break;
case RT_DEVICE_CTRL_SET_INT:
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);
USART_ITConfig(usart->usartx, USART_IT_RXNE, ENABLE);
break;
}
return RT_EOK;
}
static int hk32_putc(struct rt_serial_device *serial, char ch)
{
struct hk32_usart *usart;
RT_ASSERT(serial != RT_NULL);
usart = (struct hk32_usart *) serial->parent.user_data;
RT_ASSERT(usart != RT_NULL);
USART_SendData(usart->usartx, (uint8_t) ch);
while (USART_GetFlagStatus(usart->usartx, USART_FLAG_TXE) == RESET);
return 1;
}
static int hk32_getc(struct rt_serial_device *serial)
{
int ch;
struct hk32_usart *usart;
RT_ASSERT(serial != RT_NULL);
usart = (struct hk32_usart *) serial->parent.user_data;
RT_ASSERT(usart != RT_NULL);
ch = -1;
if (RESET != USART_GetFlagStatus(usart->usartx, USART_FLAG_RXNE))
{
ch = USART_ReceiveData(usart->usartx) & 0xff;
}
return ch;
}
static const struct rt_uart_ops hk32_usart_ops =
{
hk32_configure,
hk32_control,
hk32_putc,
hk32_getc,
RT_NULL
};
static void usart_isr(struct rt_serial_device *serial)
{
struct hk32_usart *usart_instance;
RT_ASSERT(serial != RT_NULL);
usart_instance = (struct hk32_usart *) serial->parent.user_data;
RT_ASSERT(usart_instance != RT_NULL);
if ((USART_GetITStatus(usart_instance->usartx, USART_IT_RXNE) != RESET) \
&& (RESET != USART_GetFlagStatus(usart_instance->usartx, USART_FLAG_RXNE)))
{
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
USART_ClearITPendingBit(usart_instance->usartx, USART_IT_RXNE);
USART_ClearFlag(usart_instance->usartx, USART_FLAG_RXNE);
}
else
{
if (USART_GetFlagStatus(usart_instance->usartx, USART_FLAG_CTS) != RESET)
{
USART_ClearFlag(usart_instance->usartx, USART_FLAG_CTS);
}
if (USART_GetFlagStatus(usart_instance->usartx, USART_FLAG_TC) != RESET)
{
USART_ClearFlag(usart_instance->usartx, USART_FLAG_TC);
}
}
}
#ifdef BSP_USING_UART1
void USART1_IRQHandler(void)
{
rt_interrupt_enter();
usart_isr(&usart_config[USART1_INDEX].serial);
rt_interrupt_leave();
}
#endif
#ifdef BSP_USING_UART2
void USART2_IRQHandler(void)
{
rt_interrupt_enter();
usart_isr(&usart_config[USART2_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 hk32_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 = &hk32_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;
}
INIT_BOARD_EXPORT(rt_hw_usart_init);
#endif /* BSP_USING_SERIAL */
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