====== Portwell NANO-6050 ======
  * Product Page: https://portwell.com/products/detail.php?CUSTCHAR1=NANO-6050
  * Manual: [[http://drivers.portwell.com/IPC_Manual/NANO/NANO-6050/Manual_NANO-6050_R1_1.2_20161107.pdf|Manual_NANO-6050_R1_1.2_20161107.pdf]] ({{ ::manual_nano-6050_r1_1.2_20161107.pdf |}})

===== Portwell Engineering Tool =====
{{ ::20210825_unified_pet_4.4.27.zip |}}

===== GPIO Use Examples =====
{{::nano-6050_gpio_map.png?nolink&200|}}

==== LED Blink ====
Connect LEDs (though resistors!) to GPIO 1 & 2

<code c blink.c>
#include "stdafx.h"
#include "User_Api.h"
#include "PET_Type.h"
#include "time.h"

void delay(int sec)
{
    int ms = 1000 * sec;
    clock_t start_time = clock();
    while (clock() < start_time + ms);
}

int main()
{
	int i;

	// init portwell API
	PET_API_Init();


	// set GPIO 1 and 2 to outputs
	PET_GPIO_SetPinDirection (1, 1, 0);
	PET_GPIO_SetPinDirection (1, 2, 0);

	// blink!
	for (i = 1; i < 100; i++)
	{
		PET_GPIO_WritePin(1, 1, 1);
		PET_GPIO_WritePin(1, 2, 0);
		delay(75);
		PET_GPIO_WritePin(1, 1, 0);
		PET_GPIO_WritePin(1, 2, 1);
		delay(75);
	}

	// turn both LEDs off
	PET_GPIO_WritePin(1, 1, 0);
	PET_GPIO_WritePin(1, 2, 0);


	// close portwell API
	PET_API_Uninit ();

}
</code>

Build: 

''gcc blink.c -o blink libapi_x64.a -lm''

==== Input Test ====
Connect GPIOs 3 & 4 to ground through buttons

<code c inputTest.c>
#include "stdafx.h"
#include "User_Api.h"
#include "PET_Type.h"
#include "time.h"

void delay(int sec)
{
    int ms = 1000 * sec;
    clock_t start_time = clock();
    while (clock() < start_time + ms);
}

int main()
{
	int i;

	// start portwell API
	PET_API_Init();

	// set pin 3 & 4 as an input
	PET_GPIO_SetPinDirection (1, 3, 1);
	PET_GPIO_SetPinDirection (1, 4, 1);

	unsigned char greenvalue = 0;
	unsigned char redvalue = 0;

	for (i = 1; i < 20; i++)
	{
		// read pins, print values
		PET_GPIO_ReadPin(1, 4, &greenvalue);
		printf("\n Green is: %d", greenvalue);
		PET_GPIO_ReadPin(1, 3, &redvalue);
		printf("\n   Red is: %d\n", redvalue);
		delay(200);
	}

	printf("\n");

	// close API
	PET_API_Uninit ();


}
</code>

Build: 

''gcc inputTest.c -o inputTest libapi_x64.a -lm''

==== Button LED ====
Lights LEDs when buttons are pressed.

<code c buttonLED.c>
#include "stdafx.h"
#include "signal.h"
#include "User_Api.h"
#include "PET_Type.h"
#include "time.h"

static volatile sig_atomic_t keep_running = 1;

static void sig_handler(int _)
{
    (void)_;
    keep_running = 0;
}

int main(void)
{

	signal(SIGINT, sig_handler);

	// start portwell API
	PET_API_Init();

	// set pin 3 & 4 as inputs
	PET_GPIO_SetPinDirection (1, 3, 1);
	PET_GPIO_SetPinDirection (1, 4, 1);

	// set pin 1 & 2 as outputs
	PET_GPIO_SetPinDirection (1, 1, 0);
	PET_GPIO_SetPinDirection (1, 2, 0);

	// pull 1 & 2 low
	PET_GPIO_WritePin(1, 1, 0);
	PET_GPIO_WritePin(1, 2, 0);

	unsigned char greenvalue = 0;
	unsigned char redvalue = 0;

	while (keep_running)
	{
		// read pins, print values
		PET_GPIO_ReadPin(1, 4, &greenvalue);
		PET_GPIO_ReadPin(1, 3, &redvalue);

		// check for button presses (0)
		// bring pin high if pressed, low when released

		// green
		if (greenvalue == 0) {
			PET_GPIO_WritePin(1, 2, 1);
			} else {
		if (greenvalue == 1) {
			PET_GPIO_WritePin(1, 2, 0);
		}

		//red
		if (redvalue == 0) {
			PET_GPIO_WritePin(1, 1, 1);
			} else {
		if (redvalue == 1) {
			PET_GPIO_WritePin(1, 1, 0);
			}
		}
	}


	}
	// close API
	PET_API_Uninit ();

    return EXIT_SUCCESS;
}
</code>

==== Heartbeat ====
<code c heartbeat.c>
#include "stdafx.h"
#include "signal.h"
#include "User_Api.h"
#include "PET_Type.h"
#include "time.h"
#include "stdio.h"

static volatile sig_atomic_t keep_running = 1;

static void sig_handler(int _)
{
    (void)_;
    keep_running = 0;
}

void delay(int sec)
{
    int ms = 1000 * sec;
    clock_t start_time = clock();
    while (clock() < start_time + ms);
}

int main(void)
{

	signal(SIGINT, sig_handler);


	// init portwell API
	PET_API_Init();


	// set GPIO 1 and 2 to outputs
	PET_GPIO_SetPinDirection (1, 2, 0);

	// blink!
	while (keep_running)
	{
		PET_GPIO_WritePin(1, 2, 1);
		delay(75);
		PET_GPIO_WritePin(1, 2, 0);
		delay(100);
		PET_GPIO_WritePin(1, 2, 1);
		delay(75);
		PET_GPIO_WritePin(1, 2, 0);
		//delay(500);
		sleep(2);
	}

	// turn both LEDs off
	PET_GPIO_WritePin(1, 2, 0);

	// close portwell API
	PET_API_Uninit ();

	return EXIT_SUCCESS;

}
</code>