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- /**
- * Marlin 3D Printer Firmware
- * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
- /**
- * HAL/HAL_SPI.h
- * Core Marlin definitions for SPI, implemented in the HALs
- */
-
- #ifndef _HAL_SPI_H_
- #define _HAL_SPI_H_
-
- #include <stdint.h>
-
- /**
- * SPI speed where 0 <= index <= 6
- *
- * Approximate rates :
- *
- * 0 : 8 - 10 MHz
- * 1 : 4 - 5 MHz
- * 2 : 2 - 2.5 MHz
- * 3 : 1 - 1.25 MHz
- * 4 : 500 - 625 kHz
- * 5 : 250 - 312 kHz
- * 6 : 125 - 156 kHz
- *
- * On AVR, actual speed is F_CPU/2^(1 + index).
- * On other platforms, speed should be in range given above where possible.
- */
-
- #define SPI_FULL_SPEED 0 // Set SCK to max rate
- #define SPI_HALF_SPEED 1 // Set SCK rate to half of max rate
- #define SPI_QUARTER_SPEED 2 // Set SCK rate to quarter of max rate
- #define SPI_EIGHTH_SPEED 3 // Set SCK rate to 1/8 of max rate
- #define SPI_SIXTEENTH_SPEED 4 // Set SCK rate to 1/16 of max rate
- #define SPI_SPEED_5 5 // Set SCK rate to 1/32 of max rate
- #define SPI_SPEED_6 6 // Set SCK rate to 1/64 of max rate
-
- #define SPI_LSBFIRST 0
- #define SPI_MSBFIRST 1
-
- #define SPI_DATAMODE_0 0x00
- #define SPI_DATAMODE_1 0x04
- #define SPI_DATAMODE_2 0x08
- #define SPI_DATAMODE_3 0x0C
-
- // Standard SPI functions
- /** Initialise SPI bus */
- void spiBegin(void);
- /** Configure SPI for specified SPI speed */
- void spiInit(uint8_t spiRate);
- /** Write single byte to SPI */
- void spiSend(uint8_t b);
- /** Read single byte from SPI */
- uint8_t spiRec(void);
- /** Read from SPI into buffer */
- void spiRead(uint8_t* buf, uint16_t nbyte);
- /** Write token and then write from 512 byte buffer to SPI (for SD card) */
- void spiSendBlock(uint8_t token, const uint8_t* buf);
- /** Begin SPI transaction, set clock, bit order, data mode */
- void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode);
-
- #endif // _HAL_SPI_H_
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