1 /* 2 * Common SPI abstractions. 3 * 4 * Copyright (C) 2023 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #pragma once 23 24 #ifdef __cplusplus 25 26 #include <stdint.h> 27 28 /* SPI channel abstractions. */ 29 30 class Spi_channel_base 31 { 32 public: 33 virtual uint32_t send(uint32_t bytes, const uint8_t data[]) = 0; 34 35 virtual uint32_t send_dc(uint32_t bytes, const uint8_t data[], 36 const int dc[]) = 0; 37 38 virtual uint32_t send_units(uint32_t bytes, const uint8_t data[], 39 uint8_t unit_size, uint8_t char_size) = 0; 40 }; 41 42 class Spi_control_base 43 { 44 public: 45 virtual void acquire_control(bool asserted) = 0; 46 47 virtual void release_control() = 0; 48 }; 49 50 #endif /* __cplusplus */