#include "beagle_gpio.h"
/**
* @brief Writes a value to a particular GPIO, logic-HIGH or logic-LOW.
* @param GPIONUMBER The GPIO number (e.g. 38 for gpio1[6])
* @param value The logic value we want to write to the GPIO (0 or 1)
**/
void write_GPIO_value(int GPIONUMBER, int value)
{
char export_filename[50];
FILE *f = NULL;
sprintf(export_filename, "/sys/class/gpio/gpio%d/value",GPIONUMBER);
f = fopen(export_filename,"w");
assert(f!=NULL);
fprintf(f , "%d",value);
pclose(f);
}
/**
* @brief Tells the OS that we are done with using GPIOs
* @param selected_GPIOs[] initialized array of gpioID.
* @param selectedPins[] Array with the user specified pins
* @param nbr_selectedPins Number of pins that were specified by the user
**/
void cleanup_GPIO(struct gpioID selected_GPIOs[],int selectedPins[], int nbr_selectedPins)
{
FILE *f = NULL;
int i;
for (i=0; i<nbr_selectedPins;i++)
{
//unexport the pin
f = fopen("/sys/class/gpio/unexport","w");
assert(f!=NULL);
fprintf(f, "%d",selected_GPIOs[i].GPIONUMBER);
pclose(f);
}
}
/**
* @brief Initializes all the user specified pins
* @param selected_GPIOs[] Un-initialized array of gpioID. At the end of this
* function, the selected_GPIOs[] array will be initialized.
* @param selectedPins[] Array with the user specified pins
* @param nbr_selectedPins Number of pins that were specified by the user
**/
void initialize_each_enabled_gpio(struct gpioID selected_GPIOs[],int selectedPins[], int nbr_selectedPins)
{
int i;
//this variable will contain the location of the file that we need to
//set to mode 7
char export_filename[50];
FILE *f = NULL;
//You are not allowed to use more than 32 active pins. This is not a
//beagleboard limitation, but a limitation of this code.
assert (nbr_selectedPins<=32);
//cycles every userdefined pin, and inializes its contents in the
//selected_GPIOs[] array.
for (i=0; i<nbr_selectedPins;i++)
{
switch (selectedPins[i])
{
case P9_12:
strcpy(selected_GPIOs[i].PINNAME, "P9_12");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[28]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_be1n");
selected_GPIOs[i].GPIONUMBER=60;
break;
case P9_13:
strcpy(selected_GPIOs[i].PINNAME, "P9_13");
strcpy(selected_GPIOs[i].GPIOID, "gpio0[31]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_wpn");
selected_GPIOs[i].GPIONUMBER=31;
break;
case P9_15:
strcpy(selected_GPIOs[i].PINNAME, "P9_15");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[16]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_a0");
selected_GPIOs[i].GPIONUMBER=48;
break;
case P8_11:
strcpy(selected_GPIOs[i].PINNAME, "P8_11");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[13]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_ad13");
selected_GPIOs[i].GPIONUMBER=45;
break;
case P8_12:
strcpy(selected_GPIOs[i].PINNAME, "P8_12");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[12]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_ad12");
selected_GPIOs[i].GPIONUMBER=44;
break;
case P8_14:
strcpy(selected_GPIOs[i].PINNAME, "P8_14");
strcpy(selected_GPIOs[i].GPIOID, "gpio0[26]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_ad10");
selected_GPIOs[i].GPIONUMBER=26;
break;
case P8_15:
strcpy(selected_GPIOs[i].PINNAME, "P8_15");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[15]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_ad15");
selected_GPIOs[i].GPIONUMBER=47;
break;
case P8_16:
strcpy(selected_GPIOs[i].PINNAME, "P8_16");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[14]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_ad14");
selected_GPIOs[i].GPIONUMBER=46;
break;
case P8_17:
strcpy(selected_GPIOs[i].PINNAME, "P8_17");
strcpy(selected_GPIOs[i].GPIOID, "gpio0[27]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_ad11");
selected_GPIOs[i].GPIONUMBER=27;
break;
case P8_20:
strcpy(selected_GPIOs[i].PINNAME, "P8_20");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[31]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_csn2");
selected_GPIOs[i].GPIONUMBER=63;
break;
case P8_21:
strcpy(selected_GPIOs[i].PINNAME, "P8_21");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[30]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_csn1");
selected_GPIOs[i].GPIONUMBER=62;
break;
default:
//This statement should never be reached... since
//the program won't even compile if the user
//specified a bad pin specification.
break;
}
}
//set the each mux pin to mode 7
for (i=0; i<nbr_selectedPins;i++)
{
/*
//set mux to mode 7
sprintf(export_filename, "/sys/kernel/debug/pinctrl/44e10800.pinmux/pins/%s", selected_GPIOs[i].GPIOMUX);
f = fopen(export_filename,"w");
if (f == NULL)
{
printf( "\nERROR: There was a problem opening /sys/kernel/debug/omap_mux/%s\n", selected_GPIOs[i].GPIOMUX);
printf("\n%s\t%s\t%s\t%d\n\n", selected_GPIOs[i].PINNAME, selected_GPIOs[i].GPIOID, selected_GPIOs[i].GPIOMUX, selected_GPIOs[i].GPIONUMBER);
assert(f!=NULL);
}
fprintf(f, "7");
pclose(f);
//export the pin
f = fopen("/sys/class/gpio/export","w");
if (f == NULL)
{
printf( "\nERROR: There was a problem opening /sys/kernel/debug/omap_mux/%s\n", selected_GPIOs[i].GPIOMUX);
printf("\n%s\t%s\t%s\t%d\n\n", selected_GPIOs[i].PINNAME,selected_GPIOs[i].GPIOID,selected_GPIOs[i].GPIOMUX,selected_GPIOs[i].GPIONUMBER);
assert(f!=NULL);
}
fprintf(f, "%d",selected_GPIOs[i].GPIONUMBER);
pclose(f);
*/
//set the appropriate io direction (out)
sprintf(export_filename, "/sys/class/gpio/gpio%d/direction", selected_GPIOs[i].GPIONUMBER);
f = fopen(export_filename,"w");
if (f == NULL)
{
printf( "\nERROR: There was a problem opening /sys/class/gpio/gpio%d/direction\n", selected_GPIOs[i].GPIONUMBER);
printf("\n%s\t%s\t%s\t%d\n\n",selected_GPIOs[i].PINNAME,selected_GPIOs[i].GPIOID,selected_GPIOs[i].GPIOMUX,selected_GPIOs[i].GPIONUMBER);
assert(f!=NULL);
}
fprintf(f , "out" );
pclose(f);
write_GPIO_value(selected_GPIOs[i].GPIONUMBER,0);
}
}
/**
* @brief Displays all information for each of the user specified pins.
* This function has no purpose besides live debugging.
* @param selected_GPIOs[] An valid (initialized) array of gpioID
* @param nbr_selectedPins Number of pins that were specified by the user
* @param pinDescription[] A constant array containing the description of each pin
**/
void display_each_enabled_gpio(struct gpioID selected_GPIOs[],int nbr_selectedPins,const char *pinDescription[])
{
int i;
printf("\n");
printf("PINNAME\tGPIOID\t\tGPIOMUX\t\tGPIONBR\tDESCRIPTION\n");
printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");
for (i=0; i< nbr_selectedPins; i++)
{
printf("%s\t%s\t%s\t%d\t%s\n",selected_GPIOs[i].PINNAME,selected_GPIOs[i].GPIOID,selected_GPIOs[i].GPIOMUX,selected_GPIOs[i].GPIONUMBER,pinDescription[i]);
}
printf("\n");
}
/**
* @brief Cycles through the entire array of selected_GPIOs[] and turns ON/OFF
* each associated GPIO.
* @param selected_GPIOs[] An valid (initialized) array of gpioID
* @param data_to_write An unsigned integer (32 bits), where each bit contains the
* information regarding the status of each pin: 1=turn pin ON, 0=turn pin OFF
* @param nbr_selectedPins Number of pins that were specified by the user
* @param print_to_screen This specifies if some extra information is to be displayed in the
* user screen. It has no other purpose than debugging your code. If print_to_screen == 1, data will
* be displayed on the terminal window; otherwise it will not.
* @param pinDescription[] A constant array containing the description of each pin
**/
void turn_ON_OFF_pins(struct gpioID selected_GPIOs[],unsigned int data_to_write,int nbr_selectedPins, int print_to_screen, const char *pinDescription[])
{
int i;
for (i=0;i<nbr_selectedPins;i++)
{
//code that turns ON/OFF a pin
write_GPIO_value(selected_GPIOs[i].GPIONUMBER,bitRead(data_to_write,i));
//this is just for debugging purposes
if (print_to_screen)
{
if (bitRead(data_to_write,i) == 1) printf("turning ON");
else printf("turning OFF");
printf( "\t%s (%s %d %s) - %s\n",selected_GPIOs[i].PINNAME,selected_GPIOs[i].GPIOID,selected_GPIOs[i].GPIONUMBER,selected_GPIOs[i].GPIOMUX,pinDescription[i]);
}
}
if (print_to_screen) printf("\n");
}
/**
* @brief Writes a bit into a particular location in an unsigned int variable (32 bits)
* @param groupOfBits Some data resides in these 32 bits
* @param bitVal The bitVal is wither a 1 or a 0
* @param bitLoc Where in the groupOfBits, the value of bitVal will be written.
* Keep in mind that the bitLoc values ranges 0 to 31
* @return Returns the updated groupOfBits
**/
unsigned int bitWrite(unsigned int groupOfBits, int bitVal, int bitLoc)
{
if (bitVal==1) groupOfBits |= 1 << bitLoc;
else groupOfBits &= ~(1 << bitLoc);
return(groupOfBits);
}
/**
* @brief Returns the bit value of a particular location in an unsigned int variable (32 bits)
* @param groupOfBits Some data resides in these 32 bits
* @param bitLoc Where in the groupOfBits, the value of bitVal will be written
* @return Retuns an integer with the bit value (1 or 0) that resides in bitLoc
**/
int bitRead(unsigned int groupOfBits, int bitLoc)
{
unsigned int bit = groupOfBits & (1 << bitLoc);
if (bit!=0) bit=1;
return(bit);
}
/**
* @brief Pulses a particular bit (goes HIGH then LOW) with a specify delay
* @param selected_GPIOs[] An valid (initialized) array of gpioID
* @param data_to_write An unsigned integer (32 bits), where each bit contains the
* information regarding the status of each pin: 1=turn pin ON, 0=turn pin OFF
* @param nbr_selectedPins Number of pins that were specified by the user
* @param print_to_screen This specifies if some extra information is to be displayed in the
* user screen. It has no other purpose than debugging your code. If print_to_screen == 1, data will
* be displayed on the terminal window; otherwise it will not.
* @param pinDescription[] A constant array containing the description of each pin
* @param pinID ID of pin we want to pulse
* @param delay Delay in seconds that will define the interval between signal states
**/
void pulsePin(struct gpioID enabled_gpio[],unsigned int data_to_write,int nbr_selectedPins, int print_to_screen, const char *pinDescription[], int pinID, int delay)
{
if (print_to_screen) printf("========== START: PULSING PIN %d ==========\n",pinID);
data_to_write=bitWrite(data_to_write,1,pinID);
turn_ON_OFF_pins(enabled_gpio,data_to_write,nbr_selectedPins,print_to_screen,pinDescription);
sleep(delay);
data_to_write=bitWrite(data_to_write,0,pinID);
turn_ON_OFF_pins(enabled_gpio,data_to_write,nbr_selectedPins,print_to_screen,pinDescription);
sleep(delay);
if (print_to_screen) printf("========== END: PULSING PIN %d ==========\n",pinID);
}
/**
* @brief Writes a value to a particular GPIO, logic-HIGH or logic-LOW.
* @param GPIONUMBER The GPIO number (e.g. 38 for gpio1[6])
* @param value The logic value we want to write to the GPIO (0 or 1)
**/
void write_GPIO_value(int GPIONUMBER, int value)
{
char export_filename[50];
FILE *f = NULL;
sprintf(export_filename, "/sys/class/gpio/gpio%d/value",GPIONUMBER);
f = fopen(export_filename,"w");
assert(f!=NULL);
fprintf(f , "%d",value);
pclose(f);
}
/**
* @brief Tells the OS that we are done with using GPIOs
* @param selected_GPIOs[] initialized array of gpioID.
* @param selectedPins[] Array with the user specified pins
* @param nbr_selectedPins Number of pins that were specified by the user
**/
void cleanup_GPIO(struct gpioID selected_GPIOs[],int selectedPins[], int nbr_selectedPins)
{
FILE *f = NULL;
int i;
for (i=0; i<nbr_selectedPins;i++)
{
//unexport the pin
f = fopen("/sys/class/gpio/unexport","w");
assert(f!=NULL);
fprintf(f, "%d",selected_GPIOs[i].GPIONUMBER);
pclose(f);
}
}
/**
* @brief Initializes all the user specified pins
* @param selected_GPIOs[] Un-initialized array of gpioID. At the end of this
* function, the selected_GPIOs[] array will be initialized.
* @param selectedPins[] Array with the user specified pins
* @param nbr_selectedPins Number of pins that were specified by the user
**/
void initialize_each_enabled_gpio(struct gpioID selected_GPIOs[],int selectedPins[], int nbr_selectedPins)
{
int i;
//this variable will contain the location of the file that we need to
//set to mode 7
char export_filename[50];
FILE *f = NULL;
//You are not allowed to use more than 32 active pins. This is not a
//beagleboard limitation, but a limitation of this code.
assert (nbr_selectedPins<=32);
//cycles every userdefined pin, and inializes its contents in the
//selected_GPIOs[] array.
for (i=0; i<nbr_selectedPins;i++)
{
switch (selectedPins[i])
{
case P9_12:
strcpy(selected_GPIOs[i].PINNAME, "P9_12");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[28]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_be1n");
selected_GPIOs[i].GPIONUMBER=60;
break;
case P9_13:
strcpy(selected_GPIOs[i].PINNAME, "P9_13");
strcpy(selected_GPIOs[i].GPIOID, "gpio0[31]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_wpn");
selected_GPIOs[i].GPIONUMBER=31;
break;
case P9_15:
strcpy(selected_GPIOs[i].PINNAME, "P9_15");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[16]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_a0");
selected_GPIOs[i].GPIONUMBER=48;
break;
case P8_11:
strcpy(selected_GPIOs[i].PINNAME, "P8_11");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[13]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_ad13");
selected_GPIOs[i].GPIONUMBER=45;
break;
case P8_12:
strcpy(selected_GPIOs[i].PINNAME, "P8_12");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[12]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_ad12");
selected_GPIOs[i].GPIONUMBER=44;
break;
case P8_14:
strcpy(selected_GPIOs[i].PINNAME, "P8_14");
strcpy(selected_GPIOs[i].GPIOID, "gpio0[26]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_ad10");
selected_GPIOs[i].GPIONUMBER=26;
break;
case P8_15:
strcpy(selected_GPIOs[i].PINNAME, "P8_15");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[15]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_ad15");
selected_GPIOs[i].GPIONUMBER=47;
break;
case P8_16:
strcpy(selected_GPIOs[i].PINNAME, "P8_16");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[14]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_ad14");
selected_GPIOs[i].GPIONUMBER=46;
break;
case P8_17:
strcpy(selected_GPIOs[i].PINNAME, "P8_17");
strcpy(selected_GPIOs[i].GPIOID, "gpio0[27]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_ad11");
selected_GPIOs[i].GPIONUMBER=27;
break;
case P8_20:
strcpy(selected_GPIOs[i].PINNAME, "P8_20");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[31]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_csn2");
selected_GPIOs[i].GPIONUMBER=63;
break;
case P8_21:
strcpy(selected_GPIOs[i].PINNAME, "P8_21");
strcpy(selected_GPIOs[i].GPIOID, "gpio1[30]");
strcpy(selected_GPIOs[i].GPIOMUX, "gpmc_csn1");
selected_GPIOs[i].GPIONUMBER=62;
break;
default:
//This statement should never be reached... since
//the program won't even compile if the user
//specified a bad pin specification.
break;
}
}
//set the each mux pin to mode 7
for (i=0; i<nbr_selectedPins;i++)
{
/*
//set mux to mode 7
sprintf(export_filename, "/sys/kernel/debug/pinctrl/44e10800.pinmux/pins/%s", selected_GPIOs[i].GPIOMUX);
f = fopen(export_filename,"w");
if (f == NULL)
{
printf( "\nERROR: There was a problem opening /sys/kernel/debug/omap_mux/%s\n", selected_GPIOs[i].GPIOMUX);
printf("\n%s\t%s\t%s\t%d\n\n", selected_GPIOs[i].PINNAME, selected_GPIOs[i].GPIOID, selected_GPIOs[i].GPIOMUX, selected_GPIOs[i].GPIONUMBER);
assert(f!=NULL);
}
fprintf(f, "7");
pclose(f);
//export the pin
f = fopen("/sys/class/gpio/export","w");
if (f == NULL)
{
printf( "\nERROR: There was a problem opening /sys/kernel/debug/omap_mux/%s\n", selected_GPIOs[i].GPIOMUX);
printf("\n%s\t%s\t%s\t%d\n\n", selected_GPIOs[i].PINNAME,selected_GPIOs[i].GPIOID,selected_GPIOs[i].GPIOMUX,selected_GPIOs[i].GPIONUMBER);
assert(f!=NULL);
}
fprintf(f, "%d",selected_GPIOs[i].GPIONUMBER);
pclose(f);
*/
//set the appropriate io direction (out)
sprintf(export_filename, "/sys/class/gpio/gpio%d/direction", selected_GPIOs[i].GPIONUMBER);
f = fopen(export_filename,"w");
if (f == NULL)
{
printf( "\nERROR: There was a problem opening /sys/class/gpio/gpio%d/direction\n", selected_GPIOs[i].GPIONUMBER);
printf("\n%s\t%s\t%s\t%d\n\n",selected_GPIOs[i].PINNAME,selected_GPIOs[i].GPIOID,selected_GPIOs[i].GPIOMUX,selected_GPIOs[i].GPIONUMBER);
assert(f!=NULL);
}
fprintf(f , "out" );
pclose(f);
write_GPIO_value(selected_GPIOs[i].GPIONUMBER,0);
}
}
/**
* @brief Displays all information for each of the user specified pins.
* This function has no purpose besides live debugging.
* @param selected_GPIOs[] An valid (initialized) array of gpioID
* @param nbr_selectedPins Number of pins that were specified by the user
* @param pinDescription[] A constant array containing the description of each pin
**/
void display_each_enabled_gpio(struct gpioID selected_GPIOs[],int nbr_selectedPins,const char *pinDescription[])
{
int i;
printf("\n");
printf("PINNAME\tGPIOID\t\tGPIOMUX\t\tGPIONBR\tDESCRIPTION\n");
printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");
for (i=0; i< nbr_selectedPins; i++)
{
printf("%s\t%s\t%s\t%d\t%s\n",selected_GPIOs[i].PINNAME,selected_GPIOs[i].GPIOID,selected_GPIOs[i].GPIOMUX,selected_GPIOs[i].GPIONUMBER,pinDescription[i]);
}
printf("\n");
}
/**
* @brief Cycles through the entire array of selected_GPIOs[] and turns ON/OFF
* each associated GPIO.
* @param selected_GPIOs[] An valid (initialized) array of gpioID
* @param data_to_write An unsigned integer (32 bits), where each bit contains the
* information regarding the status of each pin: 1=turn pin ON, 0=turn pin OFF
* @param nbr_selectedPins Number of pins that were specified by the user
* @param print_to_screen This specifies if some extra information is to be displayed in the
* user screen. It has no other purpose than debugging your code. If print_to_screen == 1, data will
* be displayed on the terminal window; otherwise it will not.
* @param pinDescription[] A constant array containing the description of each pin
**/
void turn_ON_OFF_pins(struct gpioID selected_GPIOs[],unsigned int data_to_write,int nbr_selectedPins, int print_to_screen, const char *pinDescription[])
{
int i;
for (i=0;i<nbr_selectedPins;i++)
{
//code that turns ON/OFF a pin
write_GPIO_value(selected_GPIOs[i].GPIONUMBER,bitRead(data_to_write,i));
//this is just for debugging purposes
if (print_to_screen)
{
if (bitRead(data_to_write,i) == 1) printf("turning ON");
else printf("turning OFF");
printf( "\t%s (%s %d %s) - %s\n",selected_GPIOs[i].PINNAME,selected_GPIOs[i].GPIOID,selected_GPIOs[i].GPIONUMBER,selected_GPIOs[i].GPIOMUX,pinDescription[i]);
}
}
if (print_to_screen) printf("\n");
}
/**
* @brief Writes a bit into a particular location in an unsigned int variable (32 bits)
* @param groupOfBits Some data resides in these 32 bits
* @param bitVal The bitVal is wither a 1 or a 0
* @param bitLoc Where in the groupOfBits, the value of bitVal will be written.
* Keep in mind that the bitLoc values ranges 0 to 31
* @return Returns the updated groupOfBits
**/
unsigned int bitWrite(unsigned int groupOfBits, int bitVal, int bitLoc)
{
if (bitVal==1) groupOfBits |= 1 << bitLoc;
else groupOfBits &= ~(1 << bitLoc);
return(groupOfBits);
}
/**
* @brief Returns the bit value of a particular location in an unsigned int variable (32 bits)
* @param groupOfBits Some data resides in these 32 bits
* @param bitLoc Where in the groupOfBits, the value of bitVal will be written
* @return Retuns an integer with the bit value (1 or 0) that resides in bitLoc
**/
int bitRead(unsigned int groupOfBits, int bitLoc)
{
unsigned int bit = groupOfBits & (1 << bitLoc);
if (bit!=0) bit=1;
return(bit);
}
/**
* @brief Pulses a particular bit (goes HIGH then LOW) with a specify delay
* @param selected_GPIOs[] An valid (initialized) array of gpioID
* @param data_to_write An unsigned integer (32 bits), where each bit contains the
* information regarding the status of each pin: 1=turn pin ON, 0=turn pin OFF
* @param nbr_selectedPins Number of pins that were specified by the user
* @param print_to_screen This specifies if some extra information is to be displayed in the
* user screen. It has no other purpose than debugging your code. If print_to_screen == 1, data will
* be displayed on the terminal window; otherwise it will not.
* @param pinDescription[] A constant array containing the description of each pin
* @param pinID ID of pin we want to pulse
* @param delay Delay in seconds that will define the interval between signal states
**/
void pulsePin(struct gpioID enabled_gpio[],unsigned int data_to_write,int nbr_selectedPins, int print_to_screen, const char *pinDescription[], int pinID, int delay)
{
if (print_to_screen) printf("========== START: PULSING PIN %d ==========\n",pinID);
data_to_write=bitWrite(data_to_write,1,pinID);
turn_ON_OFF_pins(enabled_gpio,data_to_write,nbr_selectedPins,print_to_screen,pinDescription);
sleep(delay);
data_to_write=bitWrite(data_to_write,0,pinID);
turn_ON_OFF_pins(enabled_gpio,data_to_write,nbr_selectedPins,print_to_screen,pinDescription);
sleep(delay);
if (print_to_screen) printf("========== END: PULSING PIN %d ==========\n",pinID);
}
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