void
thread_init()
{
#ifdef USE_OV
try_ov = ov_init();
#endif
#ifdef USE_MT
try_mt = mt_init();
#endif
}
/**
* \brief Initialize PIO capture and the OV7740 image sensor.
*
* \return 0 on success, 1 otherwise.
*/
static uint32_t capture_init(void)
{
twi_options_t opt;
/* Init Vsync handler */
init_vsync_interrupts();
/* Init PIO capture */
pio_capture_init(OV_DATA_BUS_PIO, OV_DATA_BUS_ID);
/* Turn on OV7740 image sensor using power pin */
ov_power(true, OV_POWER_PIO, OV_POWER_MASK);
/* Init PCK0 at 24 Mhz */
PMC->PMC_PCK[0] = (PMC_PCK_PRES_CLK_4 | PMC_PCK_CSS_PLLA_CLK);
PMC->PMC_SCER = PMC_SCER_PCK0;
while (!(PMC->PMC_SCSR & PMC_SCSR_PCK0)) {
}
/* Enable TWI peripheral */
pmc_enable_periph_clk(ID_BOARD_TWI);
/* Init TWI peripheral */
opt.master_clk = sysclk_get_cpu_hz();
opt.speed = TWI_CLK;
twi_master_init(BOARD_TWI, &opt);
/* Configure TWI interrupts */
NVIC_DisableIRQ(BOARD_TWI_IRQn);
NVIC_ClearPendingIRQ(BOARD_TWI_IRQn);
NVIC_SetPriority(BOARD_TWI_IRQn, 0);
NVIC_EnableIRQ(BOARD_TWI_IRQn);
/* OV7740 initialization*/
delay_ms(1000);
if (ov_init(BOARD_TWI) == 0) {
/* OV7740 configuration */
ov_configure(BOARD_TWI, TEST_PATTERN);
/* Wait 3 seconds to let the image sensor to adapt to the
* environment */
delay_ms(3000);
return 0;
} else {
return 1;
}
}
