/* 
 * (c) danielinux 2019
 * GPLv.2
 *
 * See LICENSE for details
 */
#include <string.h>
#include <stdio.h>
#include "system.h"
#include "led.h"
#include "display.h"
#include "spi_flash.h"
#include "uart.h"
#include "systick.h"
#include "ui.h"
#include "button.h"
#include "adc.h"
extern uint32_t cpu_freq;

#define BLINK_INTERVAL 500

static int sdcard_detected = 0;


static void bootlevel_0(void)
{
    clock_pll_on();
    uart2_setup(115200, 8, 0, 1);
    systick_enable();
    WFI();
    printf("Console on USART2 Enabled.\r\n");
    printf("\r\n=====================\r\n");
    printf("Entering bootlevel 0.\r\n");
    //led_setup(LED);
    //led_on(LED);
    printf("System clock started.\r\n");
    button_init();
    //pin_exti_init();
    printf("Buttons initialized.\r\n");
}

extern void timer_init(void);

static void bootlevel_1(void)
{
    uint16_t spiflash_vendor;
    int sdcard_present;
    printf("=====================\r\n");
    printf("Entering bootlevel 1.\r\n");

    printf("Initializing ADC...\r\n");
    adc_init();

    printf("Activating I2C bus...\r\n");
    i2c_display_init();
    printf("Display initialized.\r\n");
    printf("Displaying splash screen...\r\n");
    ui_init();
    printf("UI initialized.\r\n");
    timer_init();

    printf("System up and running.\r\n\n\n");
}

static void (*process_input_callback)(uint8_t press, int hold) = NULL;
static void (*keepalive_callback)(void) = NULL;

void set_input_callback(void (*cb)(uint8_t press, int hold))
{
    process_input_callback = cb;
}

void clear_input_callback(void)
{
    process_input_callback = NULL;
}

void set_keepalive(void (*cb)(void))
{
    keepalive_callback = cb;
}

void clear_keepalive(void)
{
    keepalive_callback = NULL;
}

void process_button(uint8_t press, int hold)
{
    if (process_input_callback)
        process_input_callback(press, hold);
    else
        ui_button_press(press, hold);
}

extern void gettime(uint32_t *s, uint32_t *us);
int main(void) {
    int hb = 1;
    int fs_on = 0;
    int ret;
    volatile uint32_t poll_time = 0;
    uint32_t bstatus = 0;

    const uint32_t hb_len = 400;
    const uint32_t hb_pulse = 5;

    bootlevel_0();
    bootlevel_1();
    //pin_exti_start_read();

    while(1) {
        hb = 1;
        //led_on(LED);
        poll_time = jiffies;

        if (!keepalive_callback)
            ui_keepalive(hb_len);
        else
            keepalive_callback();

        do {
            WFI();
            ret = button_poll(process_button);
            if (jiffies - poll_time > hb_pulse) {
                if (hb) {
                    uint32_t s, us;
                    hb = 0;
                    //led_off(LED);
//                    gettime(&s, &us);
//                    printf("TIME: %u.%05u\r\n", s, us);
                }
            }
        } while ((jiffies - poll_time) < hb_len);
    }
    return 0;
}