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#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);
}
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