static int test_timer(unsigned num)
{
int set = 0;
/* reset state */
sw_count = 0;
fired = 0;
for (unsigned i = 0; i < MAX_CHANNELS; i++) {
timeouts[i] = 0;
}
/* initialize and halt timer */
if (timer_init(TIMER_DEV(num), TIM_SPEED, cb) < 0) {
printf("TIMER_%u: ERROR on initialization - skipping\n\n", num);
return 0;
}
else {
printf("TIMER_%u: initialization successful\n", num);
}
timer_stop(TIMER_DEV(num));
printf("TIMER_%u: stopped\n", num);
/* set each available channel */
for (unsigned i = 0; i < MAX_CHANNELS; i++) {
unsigned timeout = ((i + 1) * CHAN_OFFSET);
if (timer_set(TIMER_DEV(num), i, timeout) < 0) {
break;
}
else {
++set;
printf("TIMER_%u: set channel %u to %u\n", num, i, timeout);
}
}
if (set == 0) {
printf("TIMER_%u: ERROR setting any channel\n\n", num);
return 0;
}
/* start the timer */
printf("TIMER_%u: starting\n", num);
timer_start(TIMER_DEV(num));
/* wait for all channels to fire */
do {
++sw_count;
} while (fired != set);
/* collect results */
for (int i = 0; i < fired; i++) {
printf("TIMER_%u: channel %i fired at SW count %8u",
num, i, (unsigned)timeouts[i]);
if (i == 0) {
printf(" - init: %8u\n", (unsigned)timeouts[i]);
}
else {
printf(" - diff: %8u\n", (unsigned)(timeouts[i] - timeouts[i - 1]));
}
}
return 1;
}
/**
* @brief Find device index in the pit_config array
*/
static inline unsigned int _pit_index(tim_t dev) {
return ((unsigned int)dev) - TIMER_DEV(0);
}
/**
* @brief Find device index in the lptmr_config array
*/
static inline unsigned int _lptmr_index(tim_t dev) {
return ((unsigned int)dev) - TIMER_DEV(0) - PIT_NUMOF;
}
/**
* @brief Get TIMER_x enum value from LPTMR device index
*/
static inline tim_t _lptmr_tim_t(uint8_t dev) {
return (tim_t)(((unsigned int)TIMER_DEV(0)) + PIT_NUMOF + dev);
}
/**
* @brief Get TIMER_x enum value from PIT device index
*/
static inline tim_t _pit_tim_t(uint8_t dev) {
return (tim_t)(((unsigned int)TIMER_DEV(0)) + dev);
}