95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/* **************************************************************************
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Marlin 3D Printer Firmware
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Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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****************************************************************************/
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/**
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* Description: HAL wrapper
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*
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* Supports platforms :
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* ARDUINO_ARCH_SAM : For Arduino Due and other boards based on Atmel SAM3X8E
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* ARDUINO_ARCH_AVR : For all Atmel AVR boards
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*/
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#ifndef _HAL_H
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#define _HAL_H
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#include <stdint.h>
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/**
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* SPI speed where 0 <= index <= 6
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*
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* Approximate rates :
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*
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* 0 : 8 - 10 MHz
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* 1 : 4 - 5 MHz
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* 2 : 2 - 2.5 MHz
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* 3 : 1 - 1.25 MHz
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* 4 : 500 - 625 kHz
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* 5 : 250 - 312 kHz
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* 6 : 125 - 156 kHz
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*
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* On AVR, actual speed is F_CPU/2^(1 + index).
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* On other platforms, speed should be in range given above where possible.
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*/
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/** Set SCK to max rate */
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uint8_t const SPI_FULL_SPEED = 0;
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/** Set SCK rate to half max rate. */
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uint8_t const SPI_HALF_SPEED = 1;
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/** Set SCK rate to quarter max rate. */
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uint8_t const SPI_QUARTER_SPEED = 2;
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/** Set SCK rate to 1/8 max rate. */
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uint8_t const SPI_EIGHTH_SPEED = 3;
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/** Set SCK rate to 1/16 of max rate. */
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uint8_t const SPI_SIXTEENTH_SPEED = 4;
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/** Set SCK rate to 1/32 of max rate. */
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uint8_t const SPI_SPEED_5 = 5;
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/** Set SCK rate to 1/64 of max rate. */
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uint8_t const SPI_SPEED_6 = 6;
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// Standard SPI functions
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/** Initialise SPI bus */
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void spiBegin(void);
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/** Configure SPI for specified SPI speed */
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void spiInit(uint8_t spiRate);
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/** Write single byte to SPI */
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void spiSend(uint8_t b);
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/** Read single byte from SPI */
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uint8_t spiRec(void);
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/** Read from SPI into buffer */
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void spiRead(uint8_t* buf, uint16_t nbyte);
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/** Write token and then write from 512 byte buffer to SPI (for SD card) */
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void spiSendBlock(uint8_t token, const uint8_t* buf);
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#ifdef ARDUINO_ARCH_AVR
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#include "HAL_AVR/HAL_AVR.h"
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#elif defined(ARDUINO_ARCH_SAM)
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#define CPU_32_BIT
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#include "HAL_DUE/HAL_Due.h"
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#include "math_32bit.h"
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#elif defined(__MK64FX512__) || defined(__MK66FX1M0__)
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#define CPU_32_BIT
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#include "HAL_TEENSY35_36/HAL_Teensy.h"
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#include "math_32bit.h"
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#else
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#error Unsupported Platform!
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#endif
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#endif /* HAL_H_ */
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