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- /**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- * Copyright (c) 2017 Victor Perez
- *
- * 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/>.
- *
- */
-
- /**
- * Software SPI functions originally from Arduino Sd2Card Library
- * Copyright (c) 2009 by William Greiman
- */
-
- /**
- * Adapted to the Marlin STM32F4/7 HAL
- */
-
- #if defined(STM32GENERIC) && (defined(STM32F4) || defined(STM32F7))
-
- #include "../../inc/MarlinConfig.h"
-
- #include <SPI.h>
- #include <pins_arduino.h>
- #include "../shared/HAL_SPI.h"
- #include "spi_pins.h"
-
- // ------------------------
- // Public Variables
- // ------------------------
-
- static SPISettings spiConfig;
-
- // ------------------------
- // Public functions
- // ------------------------
-
- #if ENABLED(SOFTWARE_SPI)
- // ------------------------
- // Software SPI
- // ------------------------
- #error "Software SPI not supported for STM32F4/7. Use Hardware SPI."
- #else
-
- // ------------------------
- // Hardware SPI
- // ------------------------
-
- /**
- * VGPV SPI speed start and F_CPU/2, by default 72/2 = 36Mhz
- */
-
- /**
- * @brief Begin SPI port setup
- *
- * @return Nothing
- *
- * @details Only configures SS pin since libmaple creates and initialize the SPI object
- */
- void spiBegin() {
- #if !defined(SS_PIN) || SS_PIN < 0
- #error SS_PIN not defined!
- #endif
-
- OUT_WRITE(SS_PIN, HIGH);
- }
-
- /** Configure SPI for specified SPI speed */
- void spiInit(uint8_t spiRate) {
- // Use datarates Marlin uses
- uint32_t clock;
- switch (spiRate) {
- case SPI_FULL_SPEED: clock = 20000000; break; // 13.9mhz=20000000 6.75mhz=10000000 3.38mhz=5000000 .833mhz=1000000
- case SPI_HALF_SPEED: clock = 5000000; break;
- case SPI_QUARTER_SPEED: clock = 2500000; break;
- case SPI_EIGHTH_SPEED: clock = 1250000; break;
- case SPI_SPEED_5: clock = 625000; break;
- case SPI_SPEED_6: clock = 300000; break;
- default: clock = 4000000; // Default from the SPI libarary
- }
- spiConfig = SPISettings(clock, MSBFIRST, SPI_MODE0);
- SPI.begin();
- }
-
- /**
- * @brief Receives a single byte from the SPI port.
- *
- * @return Byte received
- *
- * @details
- */
- uint8_t spiRec() {
- SPI.beginTransaction(spiConfig);
- uint8_t returnByte = SPI.transfer(0xFF);
- SPI.endTransaction();
- return returnByte;
- }
-
- /**
- * @brief Receives a number of bytes from the SPI port to a buffer
- *
- * @param buf Pointer to starting address of buffer to write to.
- * @param nbyte Number of bytes to receive.
- * @return Nothing
- *
- * @details Uses DMA
- */
- void spiRead(uint8_t* buf, uint16_t nbyte) {
- SPI.beginTransaction(spiConfig);
- #ifdef STM32GENERIC
- SPI.dmaTransfer(0, const_cast<uint8_t*>(buf), nbyte);
- #else
- SPI.transfer((uint8_t*)buf, nbyte);
- #endif
- SPI.endTransaction();
- }
-
- /**
- * @brief Sends a single byte on SPI port
- *
- * @param b Byte to send
- *
- * @details
- */
- void spiSend(uint8_t b) {
- SPI.beginTransaction(spiConfig);
- SPI.transfer(b);
- SPI.endTransaction();
- }
-
- /**
- * @brief Write token and then write from 512 byte buffer to SPI (for SD card)
- *
- * @param buf Pointer with buffer start address
- * @return Nothing
- *
- * @details Use DMA
- */
- void spiSendBlock(uint8_t token, const uint8_t* buf) {
- SPI.beginTransaction(spiConfig);
- SPI.transfer(token);
- #ifdef STM32GENERIC
- SPI.dmaSend(const_cast<uint8_t*>(buf), 512);
- #else
- SPI.transfer((uint8_t*)buf, nullptr, 512);
- #endif
- SPI.endTransaction();
- }
-
- #endif // SOFTWARE_SPI
- #endif // STM32GENERIC && (STM32F4 || STM32F7)
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