51 lines
1.8 KiB
C
51 lines
1.8 KiB
C
/**
|
|
* 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/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef _SOFTWARE_SPI_H_
|
|
#define _SOFTWARE_SPI_H_
|
|
|
|
#include "pinmapping.h"
|
|
|
|
// --------------------------------------------------------------------------
|
|
// Software SPI
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* This software SPI runs at multiple rates. The SD software provides an index
|
|
* (spiRate) of 0-6. The mapping is:
|
|
* 0 - about 5 MHz peak (6 MHz on LPC1769)
|
|
* 1-2 - about 2 MHz peak
|
|
* 3 - about 1 MHz peak
|
|
* 4 - about 500 kHz peak
|
|
* 5 - about 250 kHz peak
|
|
* 6 - about 125 kHz peak
|
|
*/
|
|
|
|
void swSpiBegin(const pin_t sck_pin, const pin_t miso_pin, const pin_t mosi_pin);
|
|
|
|
// Returns the spi_speed value to be passed to swSpiTransfer
|
|
uint8_t swSpiInit(const uint8_t spiRate, const pin_t sck_pin, const pin_t mosi_pin);
|
|
|
|
uint8_t swSpiTransfer(uint8_t b, const uint8_t spi_speed, const pin_t sck_pin, const pin_t miso_pin, const pin_t mosi_pin);
|
|
|
|
#endif // _SOFTWARE_SPI_H_
|