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#include "project.h"
static uint32_t target = 25000;
static uint32_t value = ~0U;
#define SHORT 200
#define LONG 1200
#define REPEAT 400
#define HYST 75UL
static void
show_temp (char t, uint32_t v, int y)
{
char buf[16];
uint32_t i, f;
i = v / 1000;
f = v / 100 - (i * 10);
if (v == ~0U)
{
sprintf (buf, "%c:error ", t);
}
else
{
sprintf (buf, "%c:%2d.%1d%cC", t, (int) i, (int) f, 0xdf);
}
lcd_write (buf, 0, y);
}
void
control_update (void)
{
show_temp ('P', value, 0);
show_temp ('T', target, 1);
if (value == ~0U)
relay_off ();
else if (value < (target - HYST))
relay_on ();
else if (value > (target + HYST))
relay_off ();
}
void
control_tick (void)
{
static int down, up, update;
if (!gpio_get (GPIOB, GPIO4))
down++;
else
down = 0;
if (!gpio_get (GPIOB, GPIO6))
up++;
else
up = 0;
if ((down == SHORT) || (down == LONG))
{
if (target > 100)
target -= 100;
if (down == LONG)
down = LONG - REPEAT;
control_update ();
}
if ((up == SHORT) || (up == LONG))
{
if (target < 99900)
target += 100;
if (up == LONG)
up = LONG - REPEAT;
control_update ();
}
update++;
if (update == 1000)
{
control_update ();
update = 0;
}
}
void
control_report (uint32_t v)
{
value = v;
control_update ();
}
void
control_init (void)
{
gpio_set_mode (GPIOB, GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN,
GPIO4 | GPIO6);
gpio_set_mode (GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL,
GPIO5);
gpio_set (GPIOB, GPIO4 | GPIO6);
gpio_clear (GPIOB, GPIO5);
}
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