circuitpython/ports/litex/boards/fomu/board.c

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "supervisor/board.h"

#include "mpconfigboard.h"
#include "csr.h"

// ICE40 LED Driver hard macro.
// See http://www.latticesemi.com/-/media/LatticeSemi/Documents/ApplicationNotes/IK/ICE40LEDDriverUsageGuide.ashx?document_id=50668
enum led_registers {
    LEDDCR0 = 8,
    LEDDBR = 9,
    LEDDONR = 10,
    LEDDOFR = 11,
    LEDDBCRR = 5,
    LEDDBCFR = 6,
    LEDDPWRR = 1,
    LEDDPWRG = 2,
    LEDDPWRB = 3,
};

#define BREATHE_ENABLE (1 << 7)
#define BREATHE_EDGE_ON (0 << 6)
#define BREATHE_EDGE_BOTH (1 << 6)
#define BREATHE_MODE_MODULATE (1 << 5)
#define BREATHE_RATE(x) ((x & 7) << 0)

// Write a value into the LEDDA_IP register.
static void ledda_write(uint8_t value, uint8_t addr) {
    rgb_addr_write(addr);
    rgb_dat_write(value);
}

void board_init(void) {
    uint8_t onrate = 15;
    uint8_t offrate = 1;

    ledda_write(BREATHE_ENABLE | BREATHE_MODE_MODULATE | BREATHE_RATE(onrate), LEDDBCRR);
    ledda_write(BREATHE_ENABLE | BREATHE_MODE_MODULATE | BREATHE_RATE(offrate), LEDDBCFR);

    ledda_write(123, LEDDPWRR); // Red
    ledda_write(3, LEDDPWRG);   // Green
    ledda_write(98, LEDDPWRB);  // Blue
}

bool board_requests_safe_mode(void) {
    return false;
}

void reset_board(void) {

}

void board_deinit(void) {
}