spi.h

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2013, 2014 Damien P. George
 * Copyright (c) 2021, 2022 Renesas Electronics Corporation
 *
 * 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.
 */

#ifndef MICROPY_INCLUDED_RA_SPI_H
#define MICROPY_INCLUDED_RA_SPI_H

// A transfer of "len" bytes should take len*8*1000/baudrate milliseconds.
// To simplify the calculation we assume the baudrate is never less than 8kHz
// and use that value for the baudrate in the formula, plus a small constant.
#define SPI_TRANSFER_TIMEOUT(len) ((len) + 100)

void spi_init0(void);
void spi_init(uint32_t ch);
void spi_deinit(uint32_t ch);
int spi_find_index(mp_obj_t id);
void spi_set_params(uint32_t ch, int32_t baudrate,
    int32_t polarity, int32_t phase, int32_t bits, int32_t firstbit);
void spi_transfer(uint32_t ch, uint32_t bits, size_t len, const uint8_t *src, uint8_t *dest, uint32_t timeout);

#endif // MICROPY_INCLUDED_RA_SPI_H