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/*
* Copyright (c) 2006-2020, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-02-11 supperthomas first version
*
*/
#include "board.h"
#include "uart.h"
#include "rtdevice.h"
#ifdef RT_USING_SERIAL
//#define DRV_DEBUG
//#define LOG_TAG "drv.usart"
//#include <drv_log.h>
#define UART0_CONFIG \
{ \
.name = "uart0", \
.Instance = MXC_UART_GET_UART(0), \
.irq_type = MXC_UART_GET_IRQ(0), \
}
#define UART1_CONFIG \
{ \
.name = "uart1", \
.Instance = MXC_UART_GET_UART(1), \
.irq_type = MXC_UART_GET_IRQ(1), \
}
struct mcu_uart_config
{
const char *name;
mxc_uart_regs_t *Instance;
IRQn_Type irq_type;
};
struct mcu_uart
{
mxc_uart_regs_t *handle;
struct mcu_uart_config *config;
rt_uint16_t uart_dma_flag;
struct rt_serial_device serial;
};
#if !defined(BSP_USING_UART0) && !defined(BSP_USING_UART1)
#error "Please define at least one BSP_USING_UARTx"
/* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
#endif
enum
{
#ifdef BSP_USING_UART0
UART0_INDEX,
#endif
#ifdef BSP_USING_UART1
UART1_INDEX,
#endif
};
static struct mcu_uart_config uart_config[] =
{
#ifdef BSP_USING_UART0
UART0_CONFIG,
#endif
#ifdef BSP_USING_UART1
UART1_CONFIG,
#endif
};
static struct mcu_uart uart_obj[sizeof(uart_config) / sizeof(uart_config[0])] = {0};
#ifdef BSP_USING_UART1
void UART1_IRQHandler(void)
{
rt_interrupt_enter();
rt_hw_serial_isr(&(uart_obj[UART1_INDEX].serial), RT_SERIAL_EVENT_RX_IND);
uint32_t intst = 0;
intst = MXC_UART1->int_fl;
MXC_UART1->int_fl = intst;
rt_interrupt_leave();
}
#endif
#ifdef BSP_USING_UART0
void UART0_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
rt_hw_serial_isr(&(uart_obj[UART0_INDEX].serial), RT_SERIAL_EVENT_RX_IND);
/* clear flags */
uint32_t intst = 0;
intst = MXC_UART0->int_fl;
MXC_UART0->int_fl = intst;
/* leave interrupt */
rt_interrupt_leave();
}
#endif
static rt_err_t mcu_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
int error;
struct mcu_uart *uart;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
const sys_cfg_uart_t sys_uart_cfg =
{
MAP_A,
UART_FLOW_DISABLE,
};
uart = rt_container_of(serial, struct mcu_uart, serial);
uart_cfg_t mcu_cfg;
uart->handle = uart->config->Instance;
mcu_cfg.baud = cfg->baud_rate;
mcu_cfg.stop = UART_STOP_1;
mcu_cfg.parity = UART_PARITY_DISABLE;
mcu_cfg.size = UART_DATA_SIZE_8_BITS;
mcu_cfg.flow = UART_FLOW_CTRL_EN;
mcu_cfg.pol = UART_FLOW_POL_EN;
error = UART_Init(uart->handle, &mcu_cfg, &sys_uart_cfg);
if (error != E_NO_ERROR)
{
rt_kprintf("Error initializing UART %d\n", error);
while (1) {}
}
return RT_EOK;
}
static rt_err_t mcu_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct mcu_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = rt_container_of(serial, struct mcu_uart, serial);
switch (cmd)
{
/* disable interrupt */
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
NVIC_ClearPendingIRQ(uart->config->irq_type);
NVIC_DisableIRQ(uart->config->irq_type);
/* disable interrupt */
break;
/* enable interrupt */
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
NVIC_SetPriority(uart->config->irq_type, 1);
NVIC_EnableIRQ(uart->config->irq_type);
/* enable interrupt */
uart->handle->ctrl |= 0x05 << MXC_F_UART_CTRL_RX_TO_POS;
uart->handle->int_en |= MXC_F_UART_INT_EN_RX_FIFO_THRESH | \
MXC_F_UART_INT_EN_RX_TIMEOUT;
uart->handle->int_en |= MXC_F_UART_INT_EN_RX_FRAME_ERROR | \
MXC_F_UART_INT_EN_RX_PARITY_ERROR | \
MXC_F_UART_INT_EN_RX_OVERRUN ;
uart->handle->thresh_ctrl = MXC_UART_FIFO_DEPTH <<
MXC_F_UART_THRESH_CTRL_RX_FIFO_THRESH_POS;
break;
case RT_DEVICE_CTRL_CLOSE:
UART_Shutdown(uart->handle);
break;
}
return RT_EOK;
}
static int mcu_putc(struct rt_serial_device *serial, char c)
{
struct mcu_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = rt_container_of(serial, struct mcu_uart, serial);
UART_WriteByte(uart->handle, c);
return 1;
}
static int mcu_getc(struct rt_serial_device *serial)
{
int ch;
struct mcu_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = rt_container_of(serial, struct mcu_uart, serial);
ch = -1;
if (UART_NumReadAvail(uart->handle))
{
ch = UART_ReadByte(uart->handle);
}
return ch;
}
static const struct rt_uart_ops mcu_uart_ops =
{
.configure = mcu_configure,
.control = mcu_control,
.putc = mcu_putc,
.getc = mcu_getc,
};
int rt_hw_usart_init(void)
{
rt_size_t obj_num = sizeof(uart_obj) / sizeof(struct mcu_uart);
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
rt_err_t result = 0;
for (int i = 0; i < obj_num; i++)
{
/* init UART object */
uart_obj[i].config = &uart_config[i];
uart_obj[i].serial.ops = &mcu_uart_ops;
uart_obj[i].serial.config = config;
/* register UART device */
result = rt_hw_serial_register(&uart_obj[i].serial, uart_obj[i].config->name,
RT_DEVICE_FLAG_RDWR
| RT_DEVICE_FLAG_INT_RX
| RT_DEVICE_FLAG_INT_TX
, RT_NULL);
RT_ASSERT(result == RT_EOK);
}
return result;
}
//INIT_BOARD_EXPORT(rt_hw_usart_init);
#endif /* RT_USING_SERIAL */
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