prototroller

#include "pico/stdlib.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "bsp/board.h"
#include "tusb.h"

#include "../libraries/SPIMaster.h"
#include "usb_descriptors.h"

//--------------------------------------------------------------------+
// MACRO CONSTANT TYPEDEF PROTYPES
//--------------------------------------------------------------------+

/* Blink pattern
 * - 250 ms  : device not mounted
 * - 1000 ms : device mounted
 * - 2500 ms : device is suspended
 */
enum  {
  BLINK_NOT_MOUNTED = 250,
  BLINK_MOUNTED = 1000,
  BLINK_SUSPENDED = 2500,
};

static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED;

void led_blinking_task(void);
void hid_task(void);


void printbuf(uint8_t buf[], size_t len) {
    int i;
    for (i = 0; i < len; ++i) {
        if (i % 16 == 15)
            printf("%02x\n", buf[i]);
        else
            printf("%02x ", buf[i]);
    }

    // append trailing newline if there isn't one
    if (i % 16) {
        putchar('\n');
    }
}

int main() {
    // stdio_init_all();

    // /* TINYUSB INIT */
    board_init();
    tusb_init();

    // printf("SPI Master\n");

    // SPIMaster master(0x4);
    // master.InitComponent(DEFAULT_SPI, SPI_TX_PIN, SPI_RX_PIN, SPI_SCK_PIN, SPI_CSN_PIN, 1000*1000);
    
    // gpio_init(14);
    // gpio_set_dir(14, true);
    // gpio_set_pulls(14, false, false);
    // gpio_put(14, 1);

    // gpio_init(15);
    // gpio_set_dir(15, true);
    // gpio_set_pulls(15, false, false);
    // gpio_put(15, 1);
    
    // const float conversion_factor = 3.3f / (1 << 12);
    while(true) {
    //     gpio_put(14, 0);
    //     master.masterRead();
    //     gpio_put(14, 1);
    //     printbuf(master.inBuf, 1);

    //     //sleep_ms(500);

        
    //     gpio_put(15, 0);
    //     master.masterRead();
    //     gpio_put(15, 1);

    //     uint16_t x = (master.inBuf[1] << 8) | master.inBuf[0];
    //     uint16_t y = (master.inBuf[3] << 8) | master.inBuf[2];
    printf("hello world!");
    //     printf("X Raw value: 0x%04x, voltage: %f V\n", x, x * conversion_factor);
    //     printf("Y Raw value: 0x%04x, voltage: %f V\n\n", y, y * conversion_factor);

    //     /* TINYUSB TASKS */
        tud_task();
        led_blinking_task();
        hid_task();
        
    //     sleep_ms(500);
    }
}

//--------------------------------------------------------------------+
// Device callbacks
//--------------------------------------------------------------------+

// Invoked when device is mounted
void tud_mount_cb(void)
{
  blink_interval_ms = BLINK_MOUNTED;
}

// Invoked when device is unmounted
void tud_umount_cb(void)
{
  blink_interval_ms = BLINK_NOT_MOUNTED;
}

// Invoked when usb bus is suspended
// remote_wakeup_en : if host allow us  to perform remote wakeup
// Within 7ms, device must draw an average of current less than 2.5 mA from bus
void tud_suspend_cb(bool remote_wakeup_en)
{
  (void) remote_wakeup_en;
  blink_interval_ms = BLINK_SUSPENDED;
}

// Invoked when usb bus is resumed
void tud_resume_cb(void)
{
  blink_interval_ms = BLINK_MOUNTED;
}

//--------------------------------------------------------------------+
// USB HID
//--------------------------------------------------------------------+

static void send_hid_report(uint8_t report_id, uint32_t btn)
{
  // skip if hid is not ready yet
  if ( !tud_hid_ready() ) return;

  switch(report_id)
  {
    case REPORT_ID_KEYBOARD:
    {
      // use to avoid send multiple consecutive zero report for keyboard
      static bool has_keyboard_key = false;

      if ( btn )
      {
        uint8_t keycode[6] = { 0 };
        keycode[0] = HID_KEY_A;

        tud_hid_keyboard_report(REPORT_ID_KEYBOARD, 0, keycode);
        has_keyboard_key = true;
      }else
      {
        // send empty key report if previously has key pressed
        if (has_keyboard_key) tud_hid_keyboard_report(REPORT_ID_KEYBOARD, 0, NULL);
        has_keyboard_key = false;
      }
    }
    break;

    case REPORT_ID_MOUSE:
    {
      int8_t const delta = 5;

      // no button, right + down, no scroll, no pan
      tud_hid_mouse_report(REPORT_ID_MOUSE, 0x00, delta, delta, 0, 0);
    }
    break;

    case REPORT_ID_CONSUMER_CONTROL:
    {
      // use to avoid send multiple consecutive zero report
      static bool has_consumer_key = false;

      if ( btn )
      {
        // volume down
        uint16_t volume_down = HID_USAGE_CONSUMER_VOLUME_DECREMENT;
        tud_hid_report(REPORT_ID_CONSUMER_CONTROL, &volume_down, 2);
        has_consumer_key = true;
      }else
      {
        // send empty key report (release key) if previously has key pressed
        uint16_t empty_key = 0;
        if (has_consumer_key) tud_hid_report(REPORT_ID_CONSUMER_CONTROL, &empty_key, 2);
        has_consumer_key = false;
      }
    }
    break;

    case REPORT_ID_GAMEPAD:
    {
      // use to avoid send multiple consecutive zero report for keyboard
      static bool has_gamepad_key = false;

      hid_gamepad_report_t report =
      {
        .x   = 0, .y = 0, .z = 0, .rz = 0, .rx = 0, .ry = 0,
        .hat = 0, .buttons = 0
      };

      if ( btn )
      {
        report.hat = GAMEPAD_HAT_UP;
        report.buttons = GAMEPAD_BUTTON_A;
        tud_hid_report(REPORT_ID_GAMEPAD, &report, sizeof(report));

        has_gamepad_key = true;
      }else
      {
        report.hat = GAMEPAD_HAT_CENTERED;
        report.buttons = 0;
        if (has_gamepad_key) tud_hid_report(REPORT_ID_GAMEPAD, &report, sizeof(report));
        has_gamepad_key = false;
      }
    }
    break;

    default: break;
  }
}

// Every 10ms, we will sent 1 report for each HID profile (keyboard, mouse etc ..)
// tud_hid_report_complete_cb() is used to send the next report after previous one is complete
void hid_task(void)
{
  // Poll every 10ms
  const uint32_t interval_ms = 10;
  static uint32_t start_ms = 0;

  if ( board_millis() - start_ms < interval_ms) return; // not enough time
  start_ms += interval_ms;

  uint32_t const btn = board_button_read();

  // Remote wakeup
  if ( tud_suspended() && btn )
  {
    // Wake up host if we are in suspend mode
    // and REMOTE_WAKEUP feature is enabled by host
    tud_remote_wakeup();
  }else
  {
    // Send the 1st of report chain, the rest will be sent by tud_hid_report_complete_cb()
    send_hid_report(REPORT_ID_MOUSE, btn);
  }
}

// Invoked when sent REPORT successfully to host
// Application can use this to send the next report
// Note: For composite reports, report[0] is report ID
void tud_hid_report_complete_cb(uint8_t instance, uint8_t const* report, uint8_t len)
{
  (void) instance;
  (void) len;

  uint8_t next_report_id = report[0] + 1;

  if (next_report_id < REPORT_ID_COUNT)
  {
    send_hid_report(next_report_id, board_button_read());
  }
}

// Invoked when received GET_REPORT control request
// Application must fill buffer report's content and return its length.
// Return zero will cause the stack to STALL request
uint16_t tud_hid_get_report_cb(uint8_t instance, uint8_t report_id, hid_report_type_t report_type, uint8_t* buffer, uint16_t reqlen)
{
  // TODO not Implemented
  (void) instance;
  (void) report_id;
  (void) report_type;
  (void) buffer;
  (void) reqlen;

  return 0;
}

// Invoked when received SET_REPORT control request or
// received data on OUT endpoint ( Report ID = 0, Type = 0 )
void tud_hid_set_report_cb(uint8_t instance, uint8_t report_id, hid_report_type_t report_type, uint8_t const* buffer, uint16_t bufsize)
{
  (void) instance;

  if (report_type == HID_REPORT_TYPE_OUTPUT)
  {
    // Set keyboard LED e.g Capslock, Numlock etc...
    if (report_id == REPORT_ID_KEYBOARD)
    {
      // bufsize should be (at least) 1
      if ( bufsize < 1 ) return;

      uint8_t const kbd_leds = buffer[0];

      if (kbd_leds & KEYBOARD_LED_CAPSLOCK)
      {
        // Capslock On: disable blink, turn led on
        blink_interval_ms = 0;
        board_led_write(true);
      }else
      {
        // Caplocks Off: back to normal blink
        board_led_write(false);
        blink_interval_ms = BLINK_MOUNTED;
      }
    }
  }
}

//--------------------------------------------------------------------+
// BLINKING TASK
//--------------------------------------------------------------------+
void led_blinking_task(void)
{
  static uint32_t start_ms = 0;
  static bool led_state = false;

  // blink is disabled
  if (!blink_interval_ms) return;

  // Blink every interval ms
  if ( board_millis() - start_ms < blink_interval_ms) return; // not enough time
  start_ms += blink_interval_ms;

  board_led_write(led_state);
  led_state = 1 - led_state; // toggle
}