A33's GPIO operation
1. First, set the corresponding GPIO sys_config.fex in the configuration file. And then re-packaged mirror.
[Gpio_para]
gpio_used =1
gpio_pin_1 =port:PH07<1><default><default><0>
;gpio_pin_2 =port:PH09<0><default><default><default>
gpio_pin_2 =port:PH04<1><default><default><1> ;work led
gpio_pin_3 =port:PH05<1><default><default><1> ;485 en
Brackets content: output function is assigned to an input 0 Reference
Internal resistance state 0 by default: disabled 1: 2 pull: pull-down
01 default drive capability, 2, 3, four
Output level state only 0 and 1, take effect only when the PIN configured to output.
2. Test procedures bsp_led.c
#define LED_MODULE
#include"bsp_led.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include<pthread.h>
static unsigned char ledrun;
#define LED_FILEPATH "/sys/class/gpio_sw/PH4/data" //LED
int Bsp_Led_UpData(unsigned charpin_value)
{
FILE*fp;
if((fp= fopen(LED_FILEPATH, "rb+")) == NULL)
{
printf("Cannotopen value file!\n");
exit(1);
}
if(pin_value== 0)
fprintf(fp, "0");
else
fprintf(fp, "1");
fclose(fp);
return0;
}
void *Led_pthread(void *arg)
{
while(ledrun)
{
usleep(500000);
Bsp_Led_UpData(0);
usleep(500000);
Bsp_Led_UpData(1);
}
returnNULL;
}
int Led_thread_create(void)
{
ledrun= TRUE;
returnpthread_create(&pth_led, NULL, Led_pthread, NULL);
}
int Led_thread_destroy(void)
{
ledrun = FALSE;
pthread_join(pth_led,NULL);
return0;
}
3. Bsp_led.h
#ifndef __BSP_LED_H__
#define __BSP_LED_H__
#ifndef LED_MODULE
#define LED_EXT extern
#else
#define LED_EXT
#endif//LED_MODULE
LED_EXT int Led_thread_create(void);
LED_EXT int Led_thread_destroy(void);
#endif//__BSP_LED_H__
4. main.c
#include"bsp_led.h"
int main(int argc, char **argv)
{
Led_thread_create();
while(1)
{
}
Led_thread_destroy();
return 0;
}
5. Test, a breathing A33 become light.