1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108
|
#include "gpioPin.hpp"
#include <iostream>
#include <gpiod.h>
using namespace std;
// gpiod
struct gpiod_chip *gpiochip;
struct gpiod_line *gpioline[PIN_MAX];
bool init_gpiod() {
gpiochip = gpiod_chip_open_by_name ("gpiochip4");
if (gpiochip == NULL)
gpiochip = gpiod_chip_open_by_name ("gpiochip0");
if (gpiochip == NULL) {
printf ("unable to open GPIO\n");
return false;
}
for (int loop=0; loop<PIN_MAX; loop++)
gpioline[loop]=NULL;
return true;
}
bool pinMode (int pin,int mode) {
bool flag=false;
if (pin<0) return false;
if (pin>=PIN_MAX) return false;
if (gpiochip==NULL)
init_gpiod();
if (gpiochip==NULL)
return false;
// Pin initialise
if (gpioline[pin]!=NULL)
gpiod_line_release (gpioline[pin]);
gpioline[pin] = gpiod_chip_get_line (gpiochip,pin);
if (gpioline[pin] == NULL)
return false;
switch (mode) {
case OUTPUT:
flag=gpiod_line_request_output (gpioline[pin],"ardEmul",0) ==0;
break;
case INPUT:
flag=gpiod_line_request_input (gpioline[pin],"ardEmul") ==0;
break;
case INPUT_PULLUP:
flag=gpiod_line_request_input_flags (gpioline[pin],"ardEmul",
GPIOD_LINE_REQUEST_FLAG_BIAS_PULL_UP) ==0;
break;
case INPUT_PULLDOWN:
flag=gpiod_line_request_input_flags (gpioline[pin],"ardEmul",
GPIOD_LINE_REQUEST_FLAG_BIAS_PULL_DOWN) ==0;
break;
case OPENDRAIN_PULLUP:
flag=gpiod_line_request_output_flags (gpioline[pin],"ardEmul",
GPIOD_LINE_REQUEST_FLAG_OPEN_DRAIN|GPIOD_LINE_REQUEST_FLAG_BIAS_PULL_UP,1) ==0;
}
return flag;
// besoin de configurer la broche
}
void release_gpiod (void) {
if (gpiochip!=NULL) {
for (int loop=0; loop<PIN_MAX; loop++)
if (gpioline[loop]!=NULL) {
gpiod_line_release (gpioline[loop]);
gpioline[loop]=NULL;
}
gpiod_chip_close (gpiochip);
gpiochip=NULL;
}
}
void digitalWrite (int pin,int output) {
if (pin >= PIN_MAX)
return;
if (gpioline[pin]==NULL)
pinMode (pin,OUTPUT);
gpiod_line_set_value (gpioline[pin],output);
}
int digitalRead (int pin) {
if (pin >= PIN_MAX)
return -1;
if (gpioline[pin]==NULL)
pinMode (pin,INPUT_PULLUP);
return gpiod_line_get_value (gpioline[pin]);
} |
Partager