165 lines
4.4 KiB
C++
165 lines
4.4 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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*
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* Based on Sprinter and grbl.
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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* Copyright (C) 2017 Victor Perez
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*
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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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*
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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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*
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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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/**
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* Software SPI functions originally from Arduino Sd2Card Library
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* Copyright (C) 2009 by William Greiman
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*/
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/**
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* Adapted to the STM32F4 HAL
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*/
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#ifdef STM32F4
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// --------------------------------------------------------------------------
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// Includes
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// --------------------------------------------------------------------------
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#include "HAL.h"
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#include "../HAL_SPI.h"
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#include "pins_arduino.h"
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#include "spi_pins.h"
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#include "../../core/macros.h"
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#include <SPI.h>
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// --------------------------------------------------------------------------
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// Public Variables
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// --------------------------------------------------------------------------
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static SPISettings spiConfig;
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// --------------------------------------------------------------------------
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// Public functions
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// --------------------------------------------------------------------------
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#if ENABLED(SOFTWARE_SPI)
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// --------------------------------------------------------------------------
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// Software SPI
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// --------------------------------------------------------------------------
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#error "Software SPI not supported for STM32F4. Use hardware SPI."
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#else
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// --------------------------------------------------------------------------
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// Hardware SPI
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// --------------------------------------------------------------------------
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/**
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* VGPV SPI speed start and F_CPU/2, by default 72/2 = 36Mhz
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*/
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/**
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* @brief Begin SPI port setup
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*
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* @return Nothing
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*
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* @details Only configures SS pin since libmaple creates and initialize the SPI object
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*/
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void spiBegin(void) {
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#if !PIN_EXISTS(SS)
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#error SS_PIN not defined!
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#endif
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SET_OUTPUT(SS_PIN);
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WRITE(SS_PIN, HIGH);
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}
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/** Configure SPI for specified SPI speed */
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void spiInit(uint8_t spiRate) {
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// Use datarates Marlin uses
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uint32_t clock;
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switch (spiRate) {
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case SPI_FULL_SPEED: clock = 20000000; break; // 13.9mhz=20000000 6.75mhz=10000000 3.38mhz=5000000 .833mhz=1000000
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case SPI_HALF_SPEED: clock = 5000000; break;
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case SPI_QUARTER_SPEED: clock = 2500000; break;
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case SPI_EIGHTH_SPEED: clock = 1250000; break;
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case SPI_SPEED_5: clock = 625000; break;
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case SPI_SPEED_6: clock = 300000; break;
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default:
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clock = 4000000; // Default from the SPI libarary
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}
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spiConfig = SPISettings(clock, MSBFIRST, SPI_MODE0);
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SPI.begin();
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}
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/**
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* @brief Receives a single byte from the SPI port.
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*
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* @return Byte received
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*
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* @details
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*/
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uint8_t spiRec(void) {
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SPI.beginTransaction(spiConfig);
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uint8_t returnByte = SPI.transfer(0xFF);
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SPI.endTransaction();
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return returnByte;
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}
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/**
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* @brief Receives a number of bytes from the SPI port to a buffer
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*
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* @param buf Pointer to starting address of buffer to write to.
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* @param nbyte Number of bytes to receive.
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* @return Nothing
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*
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* @details Uses DMA
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*/
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void spiRead(uint8_t* buf, uint16_t nbyte) {
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SPI.beginTransaction(spiConfig);
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SPI.dmaTransfer(0, const_cast<uint8_t*>(buf), nbyte);
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SPI.endTransaction();
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}
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/**
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* @brief Sends a single byte on SPI port
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*
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* @param b Byte to send
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*
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* @details
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*/
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void spiSend(uint8_t b) {
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SPI.beginTransaction(spiConfig);
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SPI.transfer(b);
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SPI.endTransaction();
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}
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/**
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* @brief Write token and then write from 512 byte buffer to SPI (for SD card)
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*
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* @param buf Pointer with buffer start address
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* @return Nothing
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*
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* @details Use DMA
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*/
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void spiSendBlock(uint8_t token, const uint8_t* buf) {
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SPI.beginTransaction(spiConfig);
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SPI.transfer(token);
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SPI.dmaSend(const_cast<uint8_t*>(buf), 512);
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SPI.endTransaction();
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}
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#endif // SOFTWARE_SPI
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#endif // STM32F4
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