void imx233_timrot_setup(unsigned timer_nr, bool reload, unsigned count,
unsigned src, unsigned prescale, bool polarity, imx233_timer_fn_t fn)
{
int oldstatus = disable_interrupt_save(IRQ_FIQ_STATUS);
/* only enable interrupt if function is set */
bool irq = fn != NULL;
timer_fns[timer_nr] = fn;
/* make sure we start from stop state */
HW_TIMROT_TIMCTRLn(timer_nr) = BF_OR2(TIMROT_TIMCTRLn,
SELECT(BV_TIMROT_TIMCTRLn_SELECT__NEVER_TICK), UPDATE(1));
/* write count and take effect immediately with UPDATE
* manual says count-1 for reload timers */
HW_TIMROT_TIMCOUNTn(timer_nr) = reload ? count - 1 : count;
/* start timer */
HW_TIMROT_TIMCTRLn(timer_nr) = BF_OR6(TIMROT_TIMCTRLn, SELECT(src),
PRESCALE(prescale), POLARITY(polarity), RELOAD(reload), IRQ(irq),
IRQ_EN(irq));
imx233_icoll_enable_interrupt(INT_SRC_TIMER(timer_nr), irq);
restore_interrupt(oldstatus);
}
#if defined(BOARD_UI_LED_PWM_DRIVE_ACTIVE_LOW)
# define UI_POLARITY(c) ACTIVE_LOW(c)
# define UI_DRIVE_TYPE(p) ((p)|GPIO_OPENDRAIN)
#else
# define UI_POLARITY(c) ACTIVE_HIGH((c))
# define UI_DRIVE_TYPE(p) (p)
#endif
__EXPORT const struct timer_io_channels_t led_pwm_channels[MAX_TIMER_LED_CHANNELS] = {
{
.gpio_out = DRIVE_TYPE(LED_TIM3_CH4OUT),
.gpio_in = 0,
.timer_index = 0,
.timer_channel = 4,
.masks = POLARITY(4),
},
{
.gpio_out = DRIVE_TYPE(LED_TIM3_CH1OUT),
.gpio_in = 0,
.timer_index = 0,
.timer_channel = 1,
.masks = POLARITY(1),
},
{
.gpio_out = DRIVE_TYPE(LED_TIM3_CH2OUT),
.gpio_in = 0,
.timer_index = 0,
.timer_channel = 2,
.masks = POLARITY(2),
},
