/*
 * Copyright (c) 2023 HPMicro
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 */

#include <stdio.h>
#include "board.h"
#include "hpm_sysctl_drv.h"
#include "hpm_gptmr_drv.h"
#include "hpm_debug_console.h"

#define APP_BOARD_GPTMR               BOARD_GPTMR_PWM
#define APP_BOARD_GPTMR_CH            BOARD_GPTMR_PWM_CHANNEL
#define APP_BOARD_GPTMR_IRQ           BOARD_GPTMR_PWM_IRQ
#define APP_BOARD_GPTMR_CLOCK         BOARD_GPTMR_PWM_CLK_NAME
#define APP_BOARD_GPTMR_CMP           (0)
#define APP_BOARD_GPTMR_CMPINIT       (0)         /*it's mean compare output start state, now is low*/
#define APP_BOARD_RELOAD_MS           (1000)
#define APP_BOARD_CMP_MS              (300)

static void output_compare_config(void);

volatile bool time_is_up;
volatile uint32_t count;

void isr_gptmr(void)
{
    if (gptmr_check_status(APP_BOARD_GPTMR, GPTMR_CH_CMP_STAT_MASK(APP_BOARD_GPTMR_CH, APP_BOARD_GPTMR_CMP))) {
        gptmr_clear_status(APP_BOARD_GPTMR, GPTMR_CH_CMP_STAT_MASK(APP_BOARD_GPTMR_CH, APP_BOARD_GPTMR_CMP));
        time_is_up = true;
        count = gptmr_channel_get_counter(APP_BOARD_GPTMR, APP_BOARD_GPTMR_CH, gptmr_counter_type_normal);
    }
}
SDK_DECLARE_EXT_ISR_M(APP_BOARD_GPTMR_IRQ, isr_gptmr)

int main(void)
{
    time_is_up = false;
    board_init();
    init_gptmr_pins(APP_BOARD_GPTMR);
    printf("gptmr output compare test\n");
    output_compare_config();
    while (1) {
        while (!time_is_up) {
            __asm("nop");
        }
        time_is_up = false;
        printf("compare time is up: %d\n", count);
    }
    return 0;
}

static void output_compare_config(void)
{
    gptmr_channel_config_t config;
    uint32_t gptmr_freq;
    gptmr_channel_get_default_config(APP_BOARD_GPTMR, &config);
    gptmr_freq = clock_get_frequency(APP_BOARD_GPTMR_CLOCK);
    config.reload = gptmr_freq / 1000 * APP_BOARD_RELOAD_MS;
    config.cmp[APP_BOARD_GPTMR_CMP] = gptmr_freq / 1000 * APP_BOARD_CMP_MS;
    config.cmp_initial_polarity_high = APP_BOARD_GPTMR_CMPINIT;

    gptmr_enable_irq(APP_BOARD_GPTMR, GPTMR_CH_CMP_IRQ_MASK(APP_BOARD_GPTMR_CH, APP_BOARD_GPTMR_CMP));
    gptmr_channel_config(APP_BOARD_GPTMR, APP_BOARD_GPTMR_CH, &config, false);
    gptmr_channel_reset_count(APP_BOARD_GPTMR, APP_BOARD_GPTMR_CH);
    gptmr_start_counter(APP_BOARD_GPTMR, APP_BOARD_GPTMR_CH);
    intc_m_enable_irq_with_priority(APP_BOARD_GPTMR_IRQ, 1);
}