void entry(void)
{
int8_t tag_angle;
/* set advertisment packet */
radio_advertise(&g_beacon_pkt, sizeof(g_beacon_pkt));
/* run advertisement in background every 995ms */
radio_interval_ms(995);
/* infinite foreground loop */
while(TRUE)
{
/* get tag angle from 3D accelerometer */
acc_magnitude(&tag_angle);
/* only tx while beacon is worn (facing forward +/-45 degree) */
radio_enable(abs(tag_angle)<45);
/* blink once every three seconds */
timer_wait_ms(3000);
pin_set(CONFIG_LED_PIN);
timer_wait_ms(1);
pin_clear(CONFIG_LED_PIN);
}
}
void main_entry(void)
{
uint8_t blink;
uint32_t tag_id;
/* enabled LED output */
nrf_gpio_cfg_output(CONFIG_LED_PIN);
nrf_gpio_pin_set(CONFIG_LED_PIN);
/* enabled input pin */
nrf_gpio_cfg_input(CONFIG_SWITCH_PIN, NRF_GPIO_PIN_NOPULL);
/* initialize UART */
uart_init();
/* start timer */
timer_init();
/* initialize flash */
if(flash_init())
halt(2);
/* initialize accelerometer */
if(acc_init())
halt(3);
/* calculate tag ID from NRF_FICR->DEVICEID */
tag_id = crc32(&NRF_FICR->DEVICEID, sizeof(NRF_FICR->DEVICEID));
#ifdef MARKER_TAG
tag_id |= MARKER_TAG_BIT;
#else /*MARKER_TAG*/
tag_id &= MARKER_TAG_BIT-1;
#endif/*MARKER_TAG*/
/* start radio */
debug_printf("\n\rInitializing Tag[%08X] v" PROGRAM_VERSION " @24%02iMHz ...\n\r",
tag_id,
CONFIG_TRACKER_CHANNEL);
radio_init(tag_id);
/* enter main loop */
blink = 0;
nrf_gpio_pin_clear(CONFIG_LED_PIN);
while(TRUE)
{
/* get tag angle once per second */
acc_magnitude(&g_tag_angle);
timer_wait(MILLISECONDS(1000));
/* blink every 5 seconds */
if(blink<5)
blink++;
else
{
blink = 0;
nrf_gpio_pin_set(CONFIG_LED_PIN);
timer_wait(MILLISECONDS(1));
nrf_gpio_pin_clear(CONFIG_LED_PIN);
}
}
}
