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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
*/
#include <rtthread.h>
#include "board.h"
#define LED_NUM 3
struct led_ctrl
{
uint32_t num;
uint32_t 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)
{
/*led2 Blue:P0.31 ,led1 Green:P0.30 ,led0 Red:P0_29 P38,P32*/
LPC_SYSCON->AHBCLKCTRLSET[0] = (1UL << 14); /* enable GPIO0 clock*/
LPC_SYSCON->PRESETCTRLSET[0] = (1UL << 14); /* Resets a GPIO0 peripheral */
LPC_SYSCON->PRESETCTRLCLR[0] = (1UL << 14);
/* set P0.31, P0.30, P0.29 output. */
LPC_GPIO->DIR[0] |= 0x07UL << 29;
/* turn off all the led */
LPC_GPIO->SET[0] = 0x07UL << 29;
led.ctrl[0].num = 29;
led.ctrl[0].port = 0;
led.ctrl[1].num = 30;
led.ctrl[1].port = 0;
led.ctrl[2].num = 31;
led.ctrl[2].port = 0;
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_ssize_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 ((LPC_GPIO->B[0][led.ctrl[pos + index].num]))
{
*value = 0;
}
else
{
*value = 1;
}
value++;
}
return index;
}
static rt_ssize_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 > 0)
{
//LPC_GPIO->CLR[led.ctrl[pos + index].port] |= (1 << led.ctrl[pos + index].num);
LPC_GPIO->CLR[0] |= (1 << led.ctrl[pos + index].num);
}
else
{
//LPC_GPIO->SET[led.ctrl[pos + index].port] |= (1 << led.ctrl[pos + index].num);
LPC_GPIO->SET[0] |= (1 << led.ctrl[pos + index].num);
}
}
return index;
}
static rt_err_t rt_led_control(rt_device_t dev, int cmd, void *args)
{
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;
}
void Led_Control(rt_uint32_t Set_led, rt_uint32_t value)
{
if ( Set_led == 0 )
{
/* set led status */
switch (value)
{
case 0:
/* Light off */
LPC_GPIO->B[0][led.ctrl[Set_led].num] = 1UL;
break;
case 1:
/* Lights on */
LPC_GPIO->B[0][led.ctrl[Set_led].num] = 0UL;
break;
default:
break;
}
}
if ( Set_led == 1 )
{
/* set led status */
switch (value)
{
case 0:
/* Light off */
LPC_GPIO->B[0][led.ctrl[Set_led].num] = 1UL;
break;
case 1:
/* Lights on */
LPC_GPIO->B[0][led.ctrl[Set_led].num] = 0UL;
break;
default:
break;
}
}
if ( Set_led == 2 )
{
/* set led status */
switch (value)
{
case 0:
/* Lights off */
LPC_GPIO->B[0][led.ctrl[Set_led].num] = 1UL;
break;
case 1:
/* Lights on */
LPC_GPIO->B[0][led.ctrl[Set_led].num] = 0UL;
break;
default:
break;
}
}
}
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
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