#include "FreeRTOS.h"
#include "FreeRTOSConfig.h"
#include "gd32f107c_eval.h"
#include "gd32f10x_gpio.h"
#include "stdio.h"
#define BUTTON_USER GPIO_PIN_14
#define LED_USER GPIO_PIN_0
char ButtonState = 0;
int stdout_putchar (int ch);
int stdin_getchar (void);
void DelayMS(unsigned char ms);
int stdout_putchar (int ch)
{
	usart_data_transmit(EVAL_COM1, (uint16_t)ch);	
	DelayMS(1);
	return ch;
}
int stdin_getchar (void)
{	
	return usart_data_receive(EVAL_COM1);
}
void DelayMS(unsigned char ms)
{
unsigned long us = 1000*ms;

while (us--)
  {
  __NOP();
  }
}

{
while (1)
	{
			ButtonState = !gpio_input_bit_get(GPIOB, BUTTON_USER);
			if (ButtonState)
			{
				printf("Hello world\n");
				DelayMS(250);
				DelayMS(250);
			}
	}
}	
int main(void)
{
	
	SystemInit();
	//gd_eval_led_init(LED2);
	//gd_eval_led_on(LED2);
	rcu_periph_clock_enable(RCU_GPIOC);
	gpio_init(GPIOC, GPIO_MODE_OUT_PP, GPIO_OSPEED_2MHZ, LED_USER);		
	gpio_bit_set(GPIOC, LED_USER);
	gd_eval_com_init(EVAL_COM1);
	rcu_periph_clock_enable(RCU_GPIOB);
	gpio_init(GPIOB, GPIO_MODE_IPU, GPIO_OSPEED_2MHZ, BUTTON_USER);
	
	
	xPortStartScheduler();
	while(1);
}