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add examples

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pvvx 2016-12-14 04:21:37 +03:00
parent 265d41b6a3
commit 4128624f93
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73
RTL00_SDKV35a/example_sources/gpio_level_irq/src/main.c Normal file
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/*
* Routines to access hardware
*
* Copyright (c) 2015 Realtek Semiconductor Corp.
*
* This module is a confidential and proprietary property of RealTek and
* possession or use of this module requires written permission of RealTek.
*/
#include "device.h"
#include "gpio_irq_api.h" // mbed
#include "gpio_irq_ex_api.h"
#include "diag.h"
#include "main.h"
#define GPIO_IRQ_LEVEL_PIN PC_4
#define GPIO_SIGNAL_SOURCE PC_5
gpio_irq_t gpio_level;
int current_level = IRQ_LOW;
void gpio_level_irq_handler (uint32_t id, gpio_irq_event event)
{
uint32_t *level = (uint32_t *) id;
// Disable level irq because the irq will keep triggered when it keeps in same level.
gpio_irq_disable(&gpio_level);
// make some software de-bounce here if the signal source is not stable.
if (*level == IRQ_LOW )
{
printf("low level event\r\n");
// Change to listen to high level event
*level = IRQ_HIGH;
gpio_irq_set(&gpio_level, IRQ_HIGH, 1);
gpio_irq_enable(&gpio_level);
}
else if (*level == IRQ_HIGH)
{
printf("high level event\r\n");
// Change to listen to low level event
*level = IRQ_LOW;
gpio_irq_set(&gpio_level, IRQ_LOW, 1);
gpio_irq_enable(&gpio_level);
}
}
void main(void)
{
int i;
// configure level trigger handler
gpio_irq_init(&gpio_level, GPIO_IRQ_LEVEL_PIN, gpio_level_irq_handler, (uint32_t)(&current_level));
gpio_irq_set(&gpio_level, IRQ_LOW, 1);
gpio_irq_enable(&gpio_level);
// configure gpio as signal source for high/low level trigger
gpio_t gpio_src;
gpio_init(&gpio_src, GPIO_SIGNAL_SOURCE);
gpio_dir(&gpio_src, PIN_OUTPUT); // Direction: Output
gpio_mode(&gpio_src, PullNone);
while(1) {
gpio_write(&gpio_src, 1);
for (i=0; i<20000000; i++) asm("nop");
gpio_write(&gpio_src, 0);
for (i=0; i<20000000; i++) asm("nop");
}
}