[beagleboard] I wanna 8bit gpio control
/sys/class/gpio/export this driver file i have used.
but this control only one bit. so, i try to 8bit control like this
#include bb_gpio.h
#include stdio.h
#include sys/time.h
//#include string.h
void main(void)
{
gpio_export(p9_11); gpio_export(p9_12);
gpio_export(p9_13); gpio_export(p9_14);
gpio_export(p9_15); gpio_export(p9_16);
gpio_export(p9_17); gpio_export(p9_18);
gpio_direction(p9_11,out); gpio_direction(p9_12,out);
gpio_direction(p9_13,out); gpio_direction(p9_14,out);
gpio_direction(p9_15,out); gpio_direction(p9_16,out);
gpio_direction(p9_17,out); gpio_direction(p9_18,out);
while(1){
pin_write(p9_11,1); pin_write(p9_12,1);
pin_write(p9_13,1); pin_write(p9_14,1);
pin_write(p9_15,1); pin_write(p9_16,1);
pin_write(p9_17,1); pin_write(p9_18,1);
sleep(1);
pin_write(p9_11,0); pin_wirte(p9_12,0);
pin_write(p9_13,0); pin_wirte(p9_14,0);
pin_write(p9_15,0); pin_wirte(p9_16,0);
pin_write(p9_17,0); pin_wirte(p9_18,0);
sleep(1);
};
}
#include bb_gpio.h
#ifndef BB_GPIO_H_
#define BB_GPIO_H_
#include stdio.h
#include string.h
/
* BB_GPIO headerfile
* This file only used to gpio control
* other feature using device-tree-overlay
* when using GPIO, the pin work to MODE7
*=formula==
* GPIO N1[N2]
* gpio_number = (32 x N1) + N2
*==
*/
#define out 1
#define in 0
#define export_PATH /sys/class/gpio/export
#define value_PATH /sys/class/gpio/gpio%d/value
#define direction_PATH /sys/class/gpio/gpio%d/direction
#define unexport_PATH /sys/class/gpio/unexport
//*P9***
#define p9_11 30
#define p9_12 60
#define p9_13 31
#define p9_14 50
#define p9_15 48
#define p9_16 51
#define p9_17 5
#define p9_18 4
//#define p9_19 13
//#define p9_20 12
#define p9_21 3
#define P9_22 2
#define p9_23 49
#define p9_24 15
#define p9_25 117
#define p9_26 14
#define p9_27 115
//#define p9_28 113
//#define p9_29 111
#define p9_30 112
//#define p9_31 110
#define p9_41 20
//#define p9_41 116
//#define p9_42 114
#define p9_42 7
//*
//*P8***
//*
//**function*
int gpio_export(int);
int gpio_unexport(int);
int gpio_direction(int, int);
int pin_write(int, int);
int pin_read(int);
//***
#endif /*BB_GPIO_*/
int gpio_export(int gpio_number)
{
FILE* fp=0;
if((fp = fopen(export_PATH,w))==NULL){
printf(Cannot open export file(%s).\n, export_PATH);
return -1;
}
fprintf(fp,%d,gpio_number);
fclose(fp);
}
int gpio_unexport(int gpio_number)
{
FILE* fp;
if((fp = fopen(unexport_PATH,w))==NULL){
printf(Cannot open unexport file(%s).\n, unexport_PATH);
return -1;
}
fprintf(fp,%d,gpio_number);
fclose(fp);
}
int gpio_direction(int gpio_number,int direction)
{
FILE* fp;
char set_value[4]={0};
char dir_path[50]={0};
sprintf(dir_path, direction_PATH, gpio_number);
if((fp = fopen(dir_path,w))==NULL){
printf(Cannot open direction file(%s).\n,dir_path);
return -1;
}
rewind(fp);
if(direction == out){
strcpy(set_value,out);
fwrite(set_value,sizeof(char),3,fp);
fclose(fp);
} else if(direction == in){
strcpy(set_value,in);
fwrite(set_value,sizeof(char),2,fp);
fclose(fp);
} else{
printf(invalue pin mode(%d)\n,direction);
return -1;
}
fclose(fp);
return 1;
}
int pin_write(int gpio_number,int value)
{
FILE* fp;
char val_path[50]={0};
char set_value[2]={0};
sprintf(val_path, value_PATH, gpio_number);
if((fp = fopen(val_path,w))==NULL){
printf(Cannot open value file(%s).\n,val_path);
return -1;
}
rewind(fp);
if(value == 1){
strcpy(set_value,1);
}
else if(value == 0){
strcpy(set_value,0);
}
else {
printf(invalid value pin(%d)(%d)\n, gpio_number, value);
return -1;
}
fwrite(set_value, sizeof(char), 1, fp);
fclose(fp);
return 0;
}
int pin_read(int gpio_number)
{
FILE* fp;
int value=0;
char val_path[50]={0};
sprintf(val_path, value_PATH, gpio_number);
if((fp = fopen(val_path,r))==NULL){
printf(Cannot open value file(%s).\n,val_path);
return -1;
}
rewind(fp);
value = fgetc(fp) - '0';
fclose(fp);
return value;
}
but compile error...
root@beaglebone:/home/debian/workspace/sources/gpio_control# \
gcc -o led_blink led_blink.c
/tmp/ccfrwmlk.o: In function `main':
led_blink.c:(.text+0x5c8): undefined reference to `pin_wirte'
led_blink.c:(.text+0x5e0): undefined reference to `pin_wirte'
led_blink.c:(.text+0x5f8): undefined reference to `pin_wirte'
led_blink.c:(.text+0x610): undefined reference to `pin_wirte'
collect2: ld returned 1 exit status
root@beaglebone:/home/debian/workspace/sources/gpio_control#
i don't know why .. help please
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[beagleboard] i wanna 8bit gpio control
/sys/class/gpio/export this driver file i have used.
but this control only one bit. so, i try to 8bit control like this
#include bb_gpio.h
#include stdio.h
#include sys/time.h
//#include string.h
void main(void)
{
gpio_export(p9_11); gpio_export(p9_12);
gpio_export(p9_13); gpio_export(p9_14);
gpio_export(p9_15); gpio_export(p9_16);
gpio_export(p9_17); gpio_export(p9_18);
gpio_direction(p9_11,out); gpio_direction(p9_12,out);
gpio_direction(p9_13,out); gpio_direction(p9_14,out);
gpio_direction(p9_15,out); gpio_direction(p9_16,out);
gpio_direction(p9_17,out); gpio_direction(p9_18,out);
while(1){
pin_write(p9_11,1); pin_write(p9_12,1);
pin_write(p9_13,1); pin_write(p9_14,1);
pin_write(p9_15,1); pin_write(p9_16,1);
pin_write(p9_17,1); pin_write(p9_18,1);
sleep(1);
pin_write(p9_11,0); pin_wirte(p9_12,0);
pin_write(p9_13,0); pin_wirte(p9_14,0);
pin_write(p9_15,0); pin_wirte(p9_16,0);
pin_write(p9_17,0); pin_wirte(p9_18,0);
sleep(1);
};
}
#include bb_gpio.h
#ifndef BB_GPIO_H_
#define BB_GPIO_H_
#include stdio.h
#include string.h
/
* BB_GPIO headerfile
* This file only used to gpio control
* other feature using device-tree-overlay
* when using GPIO, the pin work to MODE7
*=formula==
* GPIO N1[N2]
* gpio_number = (32 x N1) + N2
*==
*/
#define out 1
#define in 0
#define export_PATH /sys/class/gpio/export
#define value_PATH /sys/class/gpio/gpio%d/value
#define direction_PATH /sys/class/gpio/gpio%d/direction
#define unexport_PATH /sys/class/gpio/unexport
//*P9***
#define p9_11 30
#define p9_12 60
#define p9_13 31
#define p9_14 50
#define p9_15 48
#define p9_16 51
#define p9_17 5
#define p9_18 4
//#define p9_19 13
//#define p9_20 12
#define p9_21 3
#define P9_22 2
#define p9_23 49
#define p9_24 15
#define p9_25 117
#define p9_26 14
#define p9_27 115
//#define p9_28 113
//#define p9_29 111
#define p9_30 112
//#define p9_31 110
#define p9_41 20
//#define p9_41 116
//#define p9_42 114
#define p9_42 7
//*
//*P8***
//*
//**function*
int gpio_export(int);
int gpio_unexport(int);
int gpio_direction(int, int);
int pin_write(int, int);
int pin_read(int);
//***
#endif /*BB_GPIO_*/
int gpio_export(int gpio_number)
{
FILE* fp=0;
if((fp = fopen(export_PATH,w))==NULL){
printf(Cannot open export file(%s).\n, export_PATH);
return -1;
}
fprintf(fp,%d,gpio_number);
fclose(fp);
}
int gpio_unexport(int gpio_number)
{
FILE* fp;
if((fp = fopen(unexport_PATH,w))==NULL){
printf(Cannot open unexport file(%s).\n, unexport_PATH);
return -1;
}
fprintf(fp,%d,gpio_number);
fclose(fp);
}
int gpio_direction(int gpio_number,int direction)
{
FILE* fp;
char set_value[4]={0};
char dir_path[50]={0};
sprintf(dir_path, direction_PATH, gpio_number);
if((fp = fopen(dir_path,w))==NULL){
printf(Cannot open direction file(%s).\n,dir_path);
return -1;
}
rewind(fp);
if(direction == out){
strcpy(set_value,out);
fwrite(set_value,sizeof(char),3,fp);
fclose(fp);
} else if(direction == in){
strcpy(set_value,in);
fwrite(set_value,sizeof(char),2,fp);
fclose(fp);
} else{
printf(invalue pin mode(%d)\n,direction);
return -1;
}
fclose(fp);
return 1;
}
int pin_write(int gpio_number,int value)
{
FILE* fp;
char val_path[50]={0};
char set_value[2]={0};
sprintf(val_path, value_PATH, gpio_number);
if((fp = fopen(val_path,w))==NULL){
printf(Cannot open value file(%s).\n,val_path);
return -1;
}
rewind(fp);
if(value == 1){
strcpy(set_value,1);
}
else if(value == 0){
strcpy(set_value,0);
}
else {
printf(invalid value pin(%d)(%d)\n, gpio_number, value);
return -1;
}
fwrite(set_value, sizeof(char), 1, fp);
fclose(fp);
return 0;
}
int pin_read(int gpio_number)
{
FILE* fp;
int value=0;
char val_path[50]={0};
sprintf(val_path, value_PATH, gpio_number);
if((fp = fopen(val_path,r))==NULL){
printf(Cannot open value file(%s).\n,val_path);
return -1;
}
rewind(fp);
value = fgetc(fp) - '0';
fclose(fp);
return value;
}
but compile error...
root@beaglebone:/home/debian/workspace/sources/gpio_control# \
gcc -o led_blink led_blink.c
/tmp/ccfrwmlk.o: In function `main':
led_blink.c:(.text+0x5c8): undefined reference to `pin_wirte'
led_blink.c:(.text+0x5e0): undefined reference to `pin_wirte'
led_blink.c:(.text+0x5f8): undefined reference to `pin_wirte'
led_blink.c:(.text+0x610): undefined reference to `pin_wirte'
collect2: ld returned 1 exit status
root@beaglebone:/home/debian/workspace/sources/gpio_control#
i don't know why .. help please
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Re: [beagleboard] i wanna 8bit gpio control
If you look closely at the error text you'll see you misspelt write as
wirte.
On 27 Jul 2014 04:10, kthabc2...@gmail.com wrote:
/sys/class/gpio/export this driver file i have used.
but this control only one bit. so, i try to 8bit control like this
#include bb_gpio.h
#include stdio.h
#include sys/time.h
//#include string.h
void main(void)
{
gpio_export(p9_11); gpio_export(p9_12);
gpio_export(p9_13); gpio_export(p9_14);
gpio_export(p9_15); gpio_export(p9_16);
gpio_export(p9_17); gpio_export(p9_18);
gpio_direction(p9_11,out); gpio_direction(p9_12,out);
gpio_direction(p9_13,out); gpio_direction(p9_14,out);
gpio_direction(p9_15,out); gpio_direction(p9_16,out);
gpio_direction(p9_17,out); gpio_direction(p9_18,out);
while(1){
pin_write(p9_11,1); pin_write(p9_12,1);
pin_write(p9_13,1); pin_write(p9_14,1);
pin_write(p9_15,1); pin_write(p9_16,1);
pin_write(p9_17,1); pin_write(p9_18,1);
sleep(1);
pin_write(p9_11,0); pin_wirte(p9_12,0);
pin_write(p9_13,0); pin_wirte(p9_14,0);
pin_write(p9_15,0); pin_wirte(p9_16,0);
pin_write(p9_17,0); pin_wirte(p9_18,0);
sleep(1);
};
}
#include bb_gpio.h
#ifndef BB_GPIO_H_
#define BB_GPIO_H_
#include stdio.h
#include string.h
/
* BB_GPIO headerfile
* This file only used to gpio control
* other feature using device-tree-overlay
* when using GPIO, the pin work to MODE7
*=formula==
* GPIO N1[N2]
* gpio_number = (32 x N1) + N2
*==
*/
#define out 1
#define in 0
#define export_PATH /sys/class/gpio/export
#define value_PATH /sys/class/gpio/gpio%d/value
#define direction_PATH /sys/class/gpio/gpio%d/direction
#define unexport_PATH /sys/class/gpio/unexport
//*P9***
#define p9_11 30
#define p9_12 60
#define p9_13 31
#define p9_14 50
#define p9_15 48
#define p9_16 51
#define p9_17 5
#define p9_18 4
//#define p9_19 13
//#define p9_20 12
#define p9_21 3
#define P9_22 2
#define p9_23 49
#define p9_24 15
#define p9_25 117
#define p9_26 14
#define p9_27 115
//#define p9_28 113
//#define p9_29 111
#define p9_30 112
//#define p9_31 110
#define p9_41 20
//#define p9_41 116
//#define p9_42 114
#define p9_42 7
//*
//*P8***
//*
//**function*
int gpio_export(int);
int gpio_unexport(int);
int gpio_direction(int, int);
int pin_write(int, int);
int pin_read(int);
//***
#endif /*BB_GPIO_*/
int gpio_export(int gpio_number)
{
FILE* fp=0;
if((fp = fopen(export_PATH,w))==NULL){
printf(Cannot open export file(%s).\n, export_PATH);
return -1;
}
fprintf(fp,%d,gpio_number);
fclose(fp);
}
int gpio_unexport(int gpio_number)
{
FILE* fp;
if((fp = fopen(unexport_PATH,w))==NULL){
printf(Cannot open unexport file(%s).\n, unexport_PATH);
return -1;
}
fprintf(fp,%d,gpio_number);
fclose(fp);
}
int gpio_direction(int gpio_number,int direction)
{
FILE* fp;
char set_value[4]={0};
char dir_path[50]={0};
sprintf(dir_path, direction_PATH, gpio_number);
if((fp = fopen(dir_path,w))==NULL){
printf(Cannot open direction file(%s).\n,dir_path);
return -1;
}
rewind(fp);
if(direction == out){
strcpy(set_value,out);
fwrite(set_value,sizeof(char),3,fp);
fclose(fp);
} else if(direction == in){
strcpy(set_value,in);
fwrite(set_value,sizeof(char),2,fp);
fclose(fp);
} else{
printf(invalue pin mode(%d)\n,direction);
return -1;
}
fclose(fp);
return 1;
}
int pin_write(int gpio_number,int value)
{
FILE* fp;
char val_path[50]={0};
char set_value[2]={0};
sprintf(val_path, value_PATH, gpio_number);
if((fp = fopen(val_path,w))==NULL){
printf(Cannot open value file(%s).\n,val_path);
return -1;
}
rewind(fp);
if(value == 1){
strcpy(set_value,1);
}
else if(value == 0){
strcpy(set_value,0);
}
else {
printf(invalid value pin(%d)(%d)\n, gpio_number, value);
return -1;
}
fwrite(set_value, sizeof(char), 1, fp);
fclose(fp);
return 0;
}
int pin_read(int gpio_number)
{
FILE* fp;
int value=0;
char val_path[50]={0};
sprintf(val_path, value_PATH, gpio_number);
if((fp = fopen(val_path,r))==NULL){
printf(Cannot open value file(%s).\n,val_path);
return -1;
}
rewind(fp);
value = fgetc(fp) - '0';
fclose(fp);
return value;
}
but compile error...
root@beaglebone:/home/debian/workspace/sources/gpio_control# \
gcc -o led_blink led_blink.c
/tmp/ccfrwmlk.o: In function `main':
led_blink.c:(.text+0x5c8): undefined reference to `pin_wirte'
led_blink.c:(.text+0x5e0): undefined reference to `pin_wirte'
led_blink.c:(.text+0x5f8): undefined reference to `pin_wirte'
led_blink.c:(.text+0x610): undefined reference to `pin_wirte'
collect2: ld
