QMK/keyboards/betalupi_ergodox/features/beta_rawhid.c

#include "betalupi_ergodox.h"
#include "extra_mappings.h"

#include "features/beta_rawhid.h"
#include "features/rawhid_commands.h"


extern uint8_t layer_layouts[];

#ifdef ENABLE_HID_SPELLCHECK
#include "features/hid_spellcheck.h"
#endif

// See features/beta_rawhid.h for prococol documentation
void raw_hid_receive(uint8_t *data, uint8_t length) {
	uint8_t cmd = data[0];

	switch (cmd) {
		case CMD_HELLO:
			ergodox_right_led_1_on();
			_delay_ms(50);
			ergodox_right_led_1_off();

			hid_send_state();
			break;

		#ifdef ENABLE_RGB_MATRIX_FFT_ANIM
		case CMD_ANIM_DATA:
			cmd_animation(data, length);
			break;
		#endif

		#ifdef ENABLE_HID_SPELLCHECK
		case CMD_SPELLCHECK_WORD:
			if (data[1]) {
				ergodox_right_led_1_on();
				_delay_ms(50);
				ergodox_right_led_1_off();
			}
			break;
		#endif

		default:
			break;
	}

}

uint8_t nth_byte(size_t n, uint32_t data) {
	return (data >> (8 * n)) & 0xFF;
}


// state: layer state.
// If this is 0, we'll use global layer_state instead.
void _hid_send_state(_hid_send_state_args args) {

	uint32_t state = args.state ? args.state : layer_state;

	uint8_t packet[RAW_EPSIZE] = {
		CMD_SEND_STATE,

		// Animation state, set later
		0x00,

		// Layer state
		nth_byte(0, state),
		nth_byte(1, state),
		nth_byte(2, state),
		nth_byte(3, state),

		// Keymap for active layer
		layer_layouts[biton32(state)]
	};


	// Set second byte
	if (rgb_matrix_get_flags() != LED_FLAG_ALL) {
		// RGB matrix is disabled
		packet[1] = 0x00;
	} else {
		uint8_t mode = rgb_matrix_get_mode();
		switch (mode) {

			#ifdef ENABLE_RGB_MATRIX_FFT_ANIM
			case RGB_MATRIX_CUSTOM_FFT_ANIM:
				// FFT Animation is active
				packet[1] = 0x02;
				break;
			#endif

			default:
				// Normal animation is active
				packet[1] = 0x01;
				break;
		}
	}

	// Note that all sent packets MUST be
	// RAW_EPSIZE long.
	raw_hid_send(packet, RAW_EPSIZE);
}


void hid_send_special_char(uint16_t char_id) {
	uint8_t packet[RAW_EPSIZE] = {
		CMD_SPECIAL_CHAR,
		(char_id >> 0) & 0xFF,
		(char_id >> 8) & 0xFF
	};

	raw_hid_send(packet, RAW_EPSIZE);
}


#ifdef ENABLE_HID_SPELLCHECK
void hid_send_word() {
	uint8_t packet[RAW_EPSIZE] = {
		CMD_SPELLCHECK_WORD,
		spellcheck_buffer_size
	};

	for (int i = 0; i < 2 + spellcheck_buffer_size; i++) {
		packet[i + 2] = spellcheck_buffer[i];
	}

	raw_hid_send(packet, RAW_EPSIZE);
}
#endif


#ifdef ENABLE_RGB_MATRIX_FFT_ANIM
#define FFT_PER_KEY 50
void cmd_animation(uint8_t *data, uint8_t length) {
	switch (data[1]) {
		case CMD_ANIM_DATA_fft:
			// Only read data if animation is in fft mode
			if (rgb_matrix_get_mode() == RGB_MATRIX_CUSTOM_FFT_ANIM) {
				// Data should be a pointer to 10 uint8_ts, each representing
				// the height of a bar on the display.

				for (uint8_t bin = 0; bin < 10; bin++) {
					// Scale data values
					uint8_t d = data[bin + 2];


					for (uint8_t i = 0; i < 5; i++) {
						// Ignore negative indices.
						// See fft_col_to_array definition.
						if (fft_col_to_array[bin][i] < 0) {
							if (d >= FFT_PER_KEY) {
								d -= FFT_PER_KEY;
							} else {
								d = 0;
							}
							continue;
						}

						uint8_t row = fft_col_to_array[bin][i] % MATRIX_ROWS;
						uint8_t col = fft_col_to_array[bin][i] / MATRIX_ROWS;

						if (d >= FFT_PER_KEY) {
							g_rgb_frame_buffer[row][col] = 0xFF;
							d -= FFT_PER_KEY;
						} else if (d > 0) {
							g_rgb_frame_buffer[row][col] = ((double) d / FFT_PER_KEY) * 0xFF;
							d = 0;
						} else {
							g_rgb_frame_buffer[row][col] = 0;
						}

							/*
							rgb_matrix_set_color(
								fft_col_to_array[bin][i],
								last_brightness, 0x00, last_brightness
							);
							*/
					}
				}
			} else {
				// If not in fft mode and we receive fft data, send a state packet so host stops sending data.
				hid_send_state();
			}
			break;
	}
}
#endif