#include "project.h"
#define DEBOUNCE	10
#define DIAL_BLACKOUT	90 /*	(10pps)*/

static int hs_poll;
int hook;
static int dial_poll;
static int dial_pulse_blackout;
static int pulse_count;



static int fake_hook;

static void exti5_isr(void) 
{
exti_reset_request(EXTI5);
dial_poll=DEBOUNCE;
}

static void exti7_isr(void) 
{
exti_reset_request(EXTI7);
if (dial_pulse_blackout)  return;
dial_pulse_blackout=DIAL_BLACKOUT;
pulse_count++;
}


static void exti14_isr(void) 
{
exti_reset_request(EXTI14);
hs_poll=DEBOUNCE;
}



void exti9_5_isr(void)
{
if (exti_get_flag_status(EXTI5)) exti5_isr();
if (exti_get_flag_status(EXTI7)) exti7_isr();
}
void exti15_10_isr(void)
{
if (exti_get_flag_status(EXTI14)) exti14_isr();
}



static void hs_tick(void)
{
int h;


if (!hs_poll) return;
hs_poll--;


if (hs_poll) return;

h=!gpio_get(GPIOC,GPIO14);

h^=fake_hook;

if (hook==h) return;

hook=h;

printf("Hook is now %d\r\n",hook);

if (!hook) {
	if (ringing) {
	ring_off();
	answer_call();
	}
}

if (hook) {
	ring_off();
	terminate_call();
}



}
static void dial_tick(void) {
int m;

if (dial_pulse_blackout) dial_pulse_blackout--;
if (!dial_poll) return;
dial_poll--;
if (dial_poll) return;

m=!!gpio_get(GPIOA,GPIO5);


if (m) return;
if (!pulse_count) return;

dialstr_digit((pulse_count == 10) ? 0:pulse_count);
pulse_count=0;

}



void toggle_fake_hook(void)
{
fake_hook^=1;
hs_poll=DEBOUNCE;
}

void gpio_tick(void)
{
hs_tick();
dial_tick();

}





void gpio_init(void)
{
  /*GSM module reset pin*/
  gpio_set_mode (GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
                 GPIO_CNF_OUTPUT_PUSHPULL, GPIO1);
  gpio_set(GPIOA,GPIO1);


  /* Dial mute */
  gpio_set_mode (GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO4);
  gpio_set(GPIOA,GPIO4);

  gpio_set_mode (GPIOA, GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, GPIO5);
  gpio_clear(GPIOA,GPIO5);


  exti_select_source(EXTI5, GPIOA);
  exti_set_trigger(EXTI5, EXTI_TRIGGER_BOTH);
  exti_enable_request(EXTI5);

  /*Dial contacts */

  gpio_set_mode (GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO6);
  gpio_set(GPIOA,GPIO6);

  gpio_set_mode (GPIOA, GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, GPIO7);
  gpio_clear(GPIOA,GPIO7);


  exti_select_source(EXTI7, GPIOA);
  exti_set_trigger(EXTI7, EXTI_TRIGGER_RISING);
  exti_enable_request(EXTI7);


  nvic_enable_irq(NVIC_EXTI9_5_IRQ);


  /*hookswitch*/
  gpio_set_mode (GPIOC, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO15);
  gpio_set(GPIOC,GPIO15);

  gpio_set_mode (GPIOC, GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, GPIO14);
  gpio_clear(GPIOC,GPIO14);


  exti_select_source(EXTI14, GPIOC);
  exti_set_trigger(EXTI14, EXTI_TRIGGER_BOTH);
  exti_enable_request(EXTI14);

  nvic_enable_irq(NVIC_EXTI15_10_IRQ);

}