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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
- * 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 STM32F1 HAL
- */
-
- #ifdef __STM32F1__
-
- // --------------------------------------------------------------------------
- // Includes
- // --------------------------------------------------------------------------
-
- #include "../HAL.h"
- #include "../HAL_SPI.h"
- #include "pins_arduino.h"
- #include "spi_pins.h"
- #include "../../core/macros.h"
-
- // --------------------------------------------------------------------------
- // Public Variables
- // --------------------------------------------------------------------------
-
- static SPISettings spiConfig;
-
- // --------------------------------------------------------------------------
- // Public functions
- // --------------------------------------------------------------------------
-
- #if ENABLED(SOFTWARE_SPI)
- // --------------------------------------------------------------------------
- // Software SPI
- // --------------------------------------------------------------------------
- #error "Software SPI not supported for STM32F1. 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 !PIN_EXISTS(SS)
- #error "SS_PIN not defined!"
- #endif
- WRITE(SS_PIN, HIGH);
- SET_OUTPUT(SS_PIN);
- }
-
- /**
- * @brief Initializes SPI port to required speed rate and transfer mode (MSB, SPI MODE 0)
- *
- * @param spiRate Rate as declared in HAL.h (speed do not match AVR)
- * @return Nothing
- *
- * @details
- */
- void spiInit(uint8_t spiRate) {
- uint8_t clock;
- switch (spiRate) {
- case SPI_FULL_SPEED: clock = SPI_CLOCK_DIV2 ; break;
- case SPI_HALF_SPEED: clock = SPI_CLOCK_DIV4 ; break;
- case SPI_QUARTER_SPEED: clock = SPI_CLOCK_DIV8 ; break;
- case SPI_EIGHTH_SPEED: clock = SPI_CLOCK_DIV16; break;
- case SPI_SPEED_5: clock = SPI_CLOCK_DIV32; break;
- case SPI_SPEED_6: clock = SPI_CLOCK_DIV64; break;
- default:
- clock = SPI_CLOCK_DIV2; // Default from the SPI library
- }
- spiConfig = SPISettings(clock, MSBFIRST, SPI_MODE0);
- SPI.begin();
- }
-
- /**
- * @brief Receives a single byte from the SPI port.
- *
- * @return Byte received
- *
- * @details
- */
- uint8_t spiRec(void) {
- 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);
- SPI.dmaTransfer(0, const_cast<uint8*>(buf), nbyte);
- 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.send(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.send(token);
- SPI.dmaSend(const_cast<uint8*>(buf), 512);
- SPI.endTransaction();
- }
-
- /** Begin SPI transaction, set clock, bit order, data mode */
- void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) {
- spiConfig = SPISettings(spiClock, bitOrder, dataMode);
-
- SPI.beginTransaction(spiConfig);
- }
-
- #endif // SOFTWARE_SPI
-
- #endif // __STM32F1__
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