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#include "project.h"
#define OT_THM_OUT GPIO9
#define OT_THM_OUT_PORT GPIOB
#define OT_BLR_OUT GPIO8
#define OT_BLR_OUT_PORT GPIOB
typedef struct tx_phy {
int busy;
unsigned half_bit;
uint8_t data[4];
} TX_Phy;
static TX_Phy p_thm, p_blr;
#if 0
static uint32_t
cycle_diff (uint32_t a, uint32_t b)
{
return b - a;
}
#endif
static int ot_phy_tx_worker (TX_Phy *p)
{
int ret = p->half_bit & 1;
unsigned bit;
if (p->half_bit < 2)
ret ^= 1;
else if (p->half_bit < 66) {
bit = (p->half_bit >> 1) - 1;
if (p->data[bit >> 3] & (0x80 >> (bit & 7)))
ret ^= 1;
} else if (p->half_bit < 68)
ret ^= 1;
p->half_bit++;
if (p->half_bit == 68) {
p->half_bit = 0;
p->busy = 0;
}
return ret;
}
void ot_phy_tx_tick (void)
{
int v;
if (p_thm.busy) {
v = ot_phy_tx_worker (&p_thm);
if (v)
CLEAR (OT_THM_OUT);
else
SET (OT_THM_OUT);
}
if (p_blr.busy) {
v = ot_phy_tx_worker (&p_blr);
if (v)
CLEAR (OT_BLR_OUT);
else
SET (OT_BLR_OUT);
}
}
int ot_tx_thm (uint8_t *data)
{
if (p_thm.busy) return -1;
if (!data) return 0;
led_blink();
memcpy (p_thm.data, data, sizeof (p_thm.data));
p_thm.busy = 1;
return 0;
}
int ot_tx_blr (uint8_t *data)
{
if (p_blr.busy) return -1;
if (!data) return 0;
led_blink();
memcpy (p_blr.data, data, sizeof (p_blr.data));
p_blr.busy = 1;
return 0;
}
void ot_phy_tx_init (void)
{
MAP_OUTPUT_PP (OT_THM_OUT);
MAP_OUTPUT_PP (OT_BLR_OUT);
}
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