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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 <https://www.gnu.org/licenses/>.
- *
- */
- #ifdef ARDUINO_ARCH_ESP32
-
- #include "../../inc/MarlinConfig.h"
-
- #include "../shared/HAL_SPI.h"
-
- #include <pins_arduino.h>
- #include <SPI.h>
-
- // ------------------------
- // Public Variables
- // ------------------------
-
- static SPISettings spiConfig;
-
- // ------------------------
- // Public functions
- // ------------------------
-
- #if ENABLED(SOFTWARE_SPI)
-
- // ------------------------
- // Software SPI
- // ------------------------
- #error "Software SPI not supported for ESP32. Use Hardware SPI."
-
- #else
-
- // ------------------------
- // Hardware SPI
- // ------------------------
-
- void spiBegin() {
- #if !PIN_EXISTS(SS)
- #error "SS_PIN not defined!"
- #endif
-
- OUT_WRITE(SS_PIN, HIGH);
- }
-
- void spiInit(uint8_t spiRate) {
- uint32_t clock;
-
- switch (spiRate) {
- case SPI_FULL_SPEED: clock = 16000000; break;
- case SPI_HALF_SPEED: clock = 8000000; break;
- case SPI_QUARTER_SPEED: clock = 4000000; break;
- case SPI_EIGHTH_SPEED: clock = 2000000; break;
- case SPI_SIXTEENTH_SPEED: clock = 1000000; break;
- case SPI_SPEED_5: clock = 500000; break;
- case SPI_SPEED_6: clock = 250000; break;
- default: clock = 1000000; // Default from the SPI library
- }
-
- spiConfig = SPISettings(clock, MSBFIRST, SPI_MODE0);
- SPI.begin();
- }
-
- uint8_t spiRec() {
- SPI.beginTransaction(spiConfig);
- uint8_t returnByte = SPI.transfer(0xFF);
- SPI.endTransaction();
- return returnByte;
- }
-
- void spiRead(uint8_t* buf, uint16_t nbyte) {
- SPI.beginTransaction(spiConfig);
- SPI.transferBytes(0, buf, nbyte);
- SPI.endTransaction();
- }
-
- void spiSend(uint8_t b) {
- SPI.beginTransaction(spiConfig);
- SPI.transfer(b);
- SPI.endTransaction();
- }
-
- void spiSendBlock(uint8_t token, const uint8_t* buf) {
- SPI.beginTransaction(spiConfig);
- SPI.transfer(token);
- SPI.writeBytes(const_cast<uint8_t*>(buf), 512);
- SPI.endTransaction();
- }
-
- void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) {
- spiConfig = SPISettings(spiClock, bitOrder, dataMode);
-
- SPI.beginTransaction(spiConfig);
- }
-
- #endif // !SOFTWARE_SPI
-
- #endif // ARDUINO_ARCH_ESP32
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