154 lines
3.6 KiB
C
154 lines
3.6 KiB
C
/*
|
|
* Copyright (c) 2006-2018, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
*/
|
|
#include <rtthread.h>
|
|
#include "board.h"
|
|
|
|
#define LED_DEVICE_CTRL 0x81 /*LED control command*/
|
|
|
|
#define LED_NUM 4
|
|
struct led_ctrl
|
|
{
|
|
uint32_t num;
|
|
LPC_GPIO_TypeDef *port;
|
|
};
|
|
|
|
struct lpc_led
|
|
{
|
|
/* inherit from rt_device */
|
|
struct rt_device parent;
|
|
|
|
struct led_ctrl ctrl[LED_NUM];
|
|
};
|
|
|
|
static struct lpc_led led;
|
|
|
|
static rt_err_t rt_led_init(rt_device_t dev)
|
|
{
|
|
/* led0 : P4.27,led1:P4.15 ,led2:P4.16 ,led3:P4.17*/
|
|
/* set P4.14,P4.15,P4.16,P4.17 as GPIO. */
|
|
LPC_IOCON->P4_27 = 0x00;
|
|
LPC_IOCON->P4_15 = 0x00;
|
|
LPC_IOCON->P4_16 = 0x00;
|
|
LPC_IOCON->P4_17 = 0x00;
|
|
/* set P4.27,P4.15,P4.16,P4.17 output. */
|
|
LPC_GPIO4->DIR |= (0x07 << 15) | (0x01 << 27);
|
|
/* turn off all the led */
|
|
LPC_GPIO4->SET = (0x07 << 15) | (0x01 << 27);
|
|
led.ctrl[3].num = 27;
|
|
led.ctrl[3].port = LPC_GPIO4;
|
|
led.ctrl[2].num = 15;
|
|
led.ctrl[2].port = LPC_GPIO4;
|
|
led.ctrl[1].num = 16;
|
|
led.ctrl[1].port = LPC_GPIO4;
|
|
led.ctrl[0].num = 17;
|
|
led.ctrl[0].port = LPC_GPIO4;
|
|
return RT_EOK;
|
|
}
|
|
|
|
static rt_err_t rt_led_open(rt_device_t dev, rt_uint16_t oflag)
|
|
{
|
|
return RT_EOK;
|
|
}
|
|
|
|
static rt_err_t rt_led_close(rt_device_t dev)
|
|
{
|
|
return RT_EOK;
|
|
}
|
|
|
|
static rt_size_t rt_led_read(rt_device_t dev, rt_off_t pos, void *buffer,
|
|
rt_size_t size)
|
|
{
|
|
rt_ubase_t index = 0;
|
|
rt_ubase_t nr = size;
|
|
rt_uint8_t *value = buffer;
|
|
|
|
RT_ASSERT(dev == &led.parent);
|
|
RT_ASSERT((pos + size) <= LED_NUM);
|
|
|
|
for (index = 0; index < nr; index++)
|
|
{
|
|
if ((led.ctrl[pos + index].port->PIN) & 1 << led.ctrl[pos + index].num)
|
|
{
|
|
*value = 0;
|
|
}
|
|
else
|
|
{
|
|
*value = 1;
|
|
}
|
|
value++;
|
|
}
|
|
return index;
|
|
}
|
|
|
|
static rt_size_t rt_led_write(rt_device_t dev, rt_off_t pos,
|
|
const void *buffer, rt_size_t size)
|
|
{
|
|
rt_ubase_t index = 0;
|
|
rt_ubase_t nw = size;
|
|
const rt_uint8_t *value = buffer;
|
|
|
|
RT_ASSERT(dev == &led.parent);
|
|
RT_ASSERT((pos + size) <= LED_NUM);
|
|
|
|
for (index = 0; index < nw; index++)
|
|
{
|
|
if (*value++)
|
|
{
|
|
led.ctrl[pos + index].port->CLR |= (1 << led.ctrl[pos + index].num);
|
|
}
|
|
else
|
|
{
|
|
led.ctrl[pos + index].port->SET |= (1 << led.ctrl[pos + index].num);
|
|
}
|
|
}
|
|
return index;
|
|
}
|
|
|
|
static rt_err_t rt_led_control(rt_device_t dev, int cmd, void *args)
|
|
{
|
|
RT_ASSERT(dev == &led.parent);
|
|
|
|
if (cmd == LED_DEVICE_CTRL)
|
|
{
|
|
rt_uint32_t *led_num = args;
|
|
*led_num = LED_NUM;
|
|
}
|
|
return RT_EOK;
|
|
}
|
|
|
|
int rt_led_hw_init(void)
|
|
{
|
|
led.parent.type = RT_Device_Class_Char;
|
|
led.parent.rx_indicate = RT_NULL;
|
|
led.parent.tx_complete = RT_NULL;
|
|
led.parent.init = rt_led_init;
|
|
led.parent.open = rt_led_open;
|
|
led.parent.close = rt_led_close;
|
|
led.parent.read = rt_led_read;
|
|
led.parent.write = rt_led_write;
|
|
led.parent.control = rt_led_control;
|
|
led.parent.user_data = RT_NULL;
|
|
|
|
/* register a character device */
|
|
rt_device_register(&led.parent, "led", RT_DEVICE_FLAG_RDWR);
|
|
/* init led device */
|
|
rt_led_init(&led.parent);
|
|
return 0;
|
|
}
|
|
INIT_DEVICE_EXPORT(rt_led_hw_init);
|
|
#ifdef RT_USING_FINSH
|
|
#include <finsh.h>
|
|
void led_test(rt_uint32_t led_num, rt_uint32_t value)
|
|
{
|
|
rt_uint8_t led_value = value;
|
|
rt_led_write(&led.parent, led_num, &led_value, 1);
|
|
}
|
|
FINSH_FUNCTION_EXPORT(led_test, e.g: led_test(0, 100).)
|
|
#endif
|