Hi Mangus,
As per datasheet, you can configure 17 PIN as INPUT/OUTPUT/Tristate using USB
serial configuration utility tool.
after configuring input or output you can read and write to the Pin please check GPIO.c attached with this thread.
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <getopt.h>
#include <string.h>
#include <signal.h>
#include <stdbool.h>
#include <unistd.h>
#include <sys/time.h>
#include <pthread.h>
#include <ctype.h>
#include <stdlib.h>
#include "../../common/header/CyUSBSerial.h"
#define MFG_INTERFACE 2
unsigned int getNumberOfDevices(void)
{
unsigned int num = 255;
CyGetListofDevices(&num);
return num;
} /* This function is used to find Cypress device */
bool isCypressDevice(int deviceNum)
{
CY_HANDLE handle;
unsigned char signature[6];
CY_RETURN_STATUS rStatus;
rStatus = CyOpen (deviceNum, MFG_INTERFACE, &handle);
if (rStatus != CY_SUCCESS)
{
return false;
}
rStatus = CyGetSignature (handle, signature);
if (rStatus == CY_SUCCESS)
{
CyClose (handle);
return 1;
}
else
{
return 0;
}
}
int findCypressDevice()
{
unsigned int num_devices = getNumberOfDevices();
for (unsigned int curdev = 0; curdev < num_devices; curdev++)
{
if (isCypressDevice(curdev))
return curdev;
}
return -1;
}
int main(int argc, char *argv[])
{
CY_HANDLE handle;
unsigned int device;
CY_RETURN_STATUS rStatus;
CY_DEVICE_INFO deviceInfo;
UINT8 value = 0;
UINT8 Gpio_Num = 10;
printf("Infineon USB Serail GPIO Read Toggle Utility\n");
if( argc == 2 )
{
Gpio_Num = atoi(argv[1]);
printf("Selected GPIO %d\n", Gpio_Num);
}
else
{
printf("Only One argument expected, [./CySerailGpio 10] \n");
}
rStatus = CyLibraryInit (); //Initates Cypress Library
if (rStatus != CY_SUCCESS)
{
printf ("CY:Error in Doing library init Error NO:<%d> \n", rStatus);
return rStatus;
}
device = findCypressDevice(); //This function is used to detect Cypress device connected to USB bus.
printf("device : %d\n",device);
if (device < 0)
{
printf ("CY:Error in Find Cypress USB Serail Device Error NO:<%d> \n", rStatus);
return 0;
}
rStatus = CyGetDeviceInfo(device, &deviceInfo); //This API is used to get information(VID,PID) about detected Cypress device.
if (rStatus != CY_SUCCESS)
{
printf ("CY:Error in Get device Info Error NO:<%d> \n", rStatus);
return 0;
}
rStatus = CyOpen(device, MFG_INTERFACE, &handle); //This API is used to open Cypress device (Gets handle of device)
if (rStatus != CY_SUCCESS)
{
printf ("CY:Error in Open Device Error NO:<%d> \n", rStatus);
return 0;
}
rStatus=CyGetGpioValue(handle,Gpio_Num,&value); //This API is used to retrieve value of GPIO1.
if (rStatus == CY_SUCCESS)
{
printf("GPIO Status retrieved %d\n",value);
}
else
{
printf("GPIO Status Read Error\n");
}
if(value == 1)
{
value = 0;
}
else
{
value = 1;
}
rStatus=CySetGpioValue(handle,Gpio_Num,value); //This API is used to set value of GPIO.
if (rStatus == CY_SUCCESS)
{
printf("Value changed to %d\n",value);
}
else
{
printf("Not changed \n");
}
rStatus= CyClose(handle); //This API is used to close the Cypress device.
if (rStatus == CY_SUCCESS)
{
printf("Device closed\n");
}
else
{
printf("Not closed\n");
}
CyLibraryExit (); //This API is used to exit library.
} /* This function is used to get number of connected Cypress Devices */
Thank you
Varun Narolkar
