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/*
* File : drv_uart.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2008 - 2016, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2018-05-08 zhuangwei the first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <rthw.h>
#include "drv_uart.h"
#include "ls1c_pin.h"
#include "ls1c_uart.h"
/* STM32 uart driver */
struct rt_uart_ls1c
{
ls1c_uart_t UARTx;
rt_uint32_t IRQ;
};
static rt_err_t ls1c_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
struct rt_uart_ls1c *uart_dev = RT_NULL;
ls1c_uart_info_t uart_info = {0};
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
uart_dev = (struct rt_uart_ls1c *)serial->parent.user_data;
// 初始化串口
uart_info.UARTx = uart_dev->UARTx;
uart_info.baudrate = cfg->baud_rate;
uart_info.rx_enable = TRUE;
uart_init(&uart_info);
return RT_EOK;
}
static rt_err_t ls1c_uart_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct rt_uart_ls1c *uart_dev = RT_NULL;
RT_ASSERT(serial != RT_NULL);
uart_dev = (struct rt_uart_ls1c *)serial->parent.user_data;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT: /* disable rx irq */
rt_hw_interrupt_mask(uart_dev->IRQ);
break;
case RT_DEVICE_CTRL_SET_INT: /* enable rx irq */
rt_hw_interrupt_umask(uart_dev->IRQ);
break;
default:
break;
}
return RT_EOK;
}
static int ls1c_uart_putc(struct rt_serial_device *serial, char c)
{
struct rt_uart_ls1c *uart_dev = RT_NULL;
RT_ASSERT(serial != RT_NULL);
uart_dev = (struct rt_uart_ls1c *)serial->parent.user_data;
uart_putc(uart_dev->UARTx, c);
return 1;
}
static int ls1c_uart_getc(struct rt_serial_device *serial)
{
struct rt_uart_ls1c *uart_dev = RT_NULL;
RT_ASSERT(serial != RT_NULL);
uart_dev = (struct rt_uart_ls1c *)serial->parent.user_data;
void *uart_base = uart_get_base(uart_dev->UARTx);
if (LSR_RXRDY & reg_read_8(uart_base + LS1C_UART_LSR_OFFSET))
{
return reg_read_8(uart_base + LS1C_UART_DAT_OFFSET);
}
return -1;
}
/* UART interrupt handler */
static void uart_irq_handler(int vector, void *param)
{
struct rt_serial_device *serial = (struct rt_serial_device *)param;
struct rt_uart_ls1c *uart_dev = RT_NULL;
RT_ASSERT(serial != RT_NULL);
uart_dev = (struct rt_uart_ls1c *)serial->parent.user_data;
void *uart_base = uart_get_base(uart_dev->UARTx);
unsigned char iir = reg_read_8(uart_base + LS1C_UART_IIR_OFFSET);
// 判断是否为接收超时或接收到有效数据
if ((IIR_RXTOUT & iir) || (IIR_RXRDY & iir))
{
rt_interrupt_enter();
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
rt_interrupt_leave();
}
}
static const struct rt_uart_ops stm32_uart_ops =
{
ls1c_uart_configure,
ls1c_uart_control,
ls1c_uart_putc,
ls1c_uart_getc,
};
#if defined(RT_USING_UART2)
struct rt_uart_ls1c uart2 =
{
LS1C_UART2,
LS1C_UART2_IRQ,
};
struct rt_serial_device serial2;
#endif /* RT_USING_UART1 */
void rt_hw_uart_init(void)
{
struct rt_uart_ls1c *uart;
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
#ifdef RT_USING_UART2
uart = &uart2;
serial2.ops = &stm32_uart_ops;
serial2.config = config;
pin_set_purpose(36, PIN_PURPOSE_OTHER);
pin_set_purpose(37, PIN_PURPOSE_OTHER);
pin_set_remap(36, PIN_REMAP_SECOND);
pin_set_remap(37, PIN_REMAP_SECOND);
rt_hw_interrupt_install(uart->IRQ, uart_irq_handler, &serial2, "UART2");
/* register UART1 device */
rt_hw_serial_register(&serial2,
"uart2",
//RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_DMA_RX,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif /* RT_USING_UART1 */
}
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