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counter-alarm

Open a counter, set an alarm for N ticks in the future, fire a callback. The minimal demo for <alp/counter.h>.

Source: examples/counter-alarm/.

board.yaml​

schema_version: 2

som:
  sku: E1M-AEN701

carrier:
  name: E1M-EVK

cores:
  m55_hp:
    os: zephyr
    app: ./src
    peripherals: [counter]

diagnostics:
  log_level: info

Source (abbreviated)​

#include <alp/counter.h>
#include <alp/e1m_pinout.h>

static void on_alarm(alp_counter_t *c, void *user) {
    printk("[counter] alarm fired\n");
}

int main(void) {
    alp_counter_t *cnt = alp_counter_open(&(alp_counter_config_t){
        .channel_id = E1M_COUNTER0,
        .clock_hz   = 1000000,
    });
    if (cnt == NULL) return -1;

    alp_counter_start(cnt);
    alp_counter_set_alarm(cnt, /* ticks_from_now */ 1000000u, on_alarm, NULL);

    k_msleep(2000);
    alp_counter_close(cnt);
    return 0;
}

See also​

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