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/*
* Copyright (c) 2006-2021, YICHIP Technology Co.,Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-09-09 WSY first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
struct yc3122_uart
{
UART_TypeDef *uart;
IRQn_Type irq;
};
static rt_err_t yc3122_uart_configure(struct rt_serial_device *serial,
struct serial_configure *cfg)
{
struct yc3122_uart *uart;
UART_InitTypeDef UART_initStruct;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
uart = (struct yc3122_uart *)serial->parent.user_data;
NVIC_DisableIRQ(uart->irq);
UART_initStruct.BaudRate = cfg->baud_rate;
UART_initStruct.FlowCtrl = FLOWCTRL_NONE ;
UART_initStruct.CommMode = MODE_DUPLEX;
UART_initStruct.SmartCard = SMARTCARD_DISABLE;
UART_initStruct.RxMode = MODE_RX_ENABLE;
switch (cfg->data_bits)
{
case DATA_BITS_9:
UART_initStruct.DataBits = DATABITS_9B;
break;
default:
UART_initStruct.DataBits = DATABITS_8B;
break;
}
switch (cfg->stop_bits)
{
case STOP_BITS_2:
UART_initStruct.StopBits = STOPBITS_2;
break;
default:
UART_initStruct.StopBits = STOPBITS_1;
break;
}
switch (cfg->parity)
{
case PARITY_ODD:
UART_initStruct.Parity = YC_PARITY_ODD;
break;
case PARITY_EVEN:
UART_initStruct.Parity = YC_PARITY_EVEN;
break;
default:
UART_initStruct.Parity = YC_PARITY_NONE;
break;
}
UART_Init(uart->uart, &UART_initStruct);
return RT_EOK;
}
static rt_err_t yc3122_uart_control(struct rt_serial_device *serial,
int cmd, void *arg)
{
struct yc3122_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct yc3122_uart *)serial->parent.user_data;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
UART_SetRxITNum(uart->uart, 0);
NVIC_DisableIRQ(uart->irq);
break;
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
UART_ITConfig(uart->uart, UART_IT_RX, ENABLE);
UART_SetRxITNum(uart->uart, 1);
NVIC_EnableIRQ((IRQn_Type)uart->irq);
break;
}
return RT_EOK;
}
static int yc3122_uart_putc(struct rt_serial_device *serial, char c)
{
struct yc3122_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct yc3122_uart *)serial->parent.user_data;
while (UART_IsBusy(uart->uart));
UART_SendData(uart->uart, c);
return 1;
}
static int yc3122_uart_getc(struct rt_serial_device *serial)
{
int ch;
struct yc3122_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct yc3122_uart *)serial->parent.user_data;
ch = -1;
if (UART_ReceiveDataLen(uart->uart) != 0)
{
ch = UART_ReceiveData(uart->uart);
}
return ch;
}
static const struct rt_uart_ops yc3122_uart_ops =
{
yc3122_uart_configure,
yc3122_uart_control,
yc3122_uart_putc,
yc3122_uart_getc,
};
#if defined(BSP_USING_UART0)
/* UART0 device driver structure */
static struct yc3122_uart uart0;
static struct rt_serial_device serial0;
void UART0_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
/* UART in mode Receiver */
if (UART_GetITIdentity(uart0.uart) == UART_IT_RX)
{
rt_hw_serial_isr(&serial0, RT_SERIAL_EVENT_RX_IND);
}
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART0 */
#if defined(BSP_USING_UART1)
/* UART1 device driver structure */
static struct yc3122_uart uart1;
static struct rt_serial_device serial1;
void UART1_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
/* UART in mode Receiver */
if (UART_GetITIdentity(uart1.uart) == UART_IT_RX)
{
rt_hw_serial_isr(&serial1, RT_SERIAL_EVENT_RX_IND);
}
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART1 */
int rt_hw_uart_init(void)
{
struct yc3122_uart *uart;
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
#ifdef BSP_USING_UART0
GPIO_CONFIG(53) = UART0_TXD;
GPIO_CONFIG(54) = UART0_RXD;
uart = &uart0;
uart->uart = MUART0;
uart->irq = UART0_IRQn;
serial0.ops = &yc3122_uart_ops;
serial0.config = config;
/* register UART0 device */
rt_hw_serial_register(&serial0, RT_CONSOLE_DEVICE_NAME,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif /* BSP_USING_UART0 */
#ifdef BSP_USING_UART1
GPIO_CONFIG(53) = UART1_TXD;
GPIO_CONFIG(54) = UART1_RXD;
uart = &uart1;
uart->uart = MUART1;
uart->irq = UART1_IRQn;
serial1.ops = &yc3122_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 */
return 0;
}
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