mirror of
https://github.com/MarlinFirmware/Marlin.git
synced 2024-12-14 06:21:44 +00:00
131 lines
3.6 KiB
C++
131 lines
3.6 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 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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*
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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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#ifdef __MK20DX256__
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#include "HAL.h"
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#include <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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static SPISettings spiConfig;
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/**
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* Standard SPI functions
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*/
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// Initialize SPI bus
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void spiBegin() {
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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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OUT_WRITE(SS_PIN, HIGH);
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SET_OUTPUT(SCK_PIN);
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SET_INPUT(MISO_PIN);
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SET_OUTPUT(MOSI_PIN);
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#if 0 && DISABLED(SOFTWARE_SPI)
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// set SS high - may be chip select for another SPI device
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#if SET_SPI_SS_HIGH
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WRITE(SS_PIN, HIGH);
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#endif
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// set a default rate
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spiInit(SPI_HALF_SPEED); // 1
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#endif
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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 data rates Marlin uses
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uint32_t clock;
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switch (spiRate) {
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case SPI_FULL_SPEED: clock = 10000000; break;
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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 = 312500; break;
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default: 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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// SPI receive a byte
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uint8_t spiRec() {
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SPI.beginTransaction(spiConfig);
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const uint8_t returnByte = SPI.transfer(0xFF);
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SPI.endTransaction();
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return returnByte;
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//SPDR = 0xFF;
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//while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
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//return SPDR;
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}
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// SPI read data
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void spiRead(uint8_t* buf, uint16_t nbyte) {
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SPI.beginTransaction(spiConfig);
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SPI.transfer(buf, nbyte);
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SPI.endTransaction();
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//if (nbyte-- == 0) return;
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// SPDR = 0xFF;
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//for (uint16_t i = 0; i < nbyte; i++) {
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// while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
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// buf[i] = SPDR;
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// SPDR = 0xFF;
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//}
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//while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
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//buf[nbyte] = SPDR;
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}
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// SPI send a byte
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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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//SPDR = b;
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//while (!TEST(SPSR, SPIF)) { /* nada */ }
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}
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// SPI send block
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void spiSendBlock(uint8_t token, const uint8_t* buf) {
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SPI.beginTransaction(spiConfig);
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SPDR = token;
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for (uint16_t i = 0; i < 512; i += 2) {
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while (!TEST(SPSR, SPIF)) { /* nada */ };
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SPDR = buf[i];
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while (!TEST(SPSR, SPIF)) { /* nada */ };
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SPDR = buf[i + 1];
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}
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while (!TEST(SPSR, SPIF)) { /* nada */ };
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SPI.endTransaction();
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}
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// Begin SPI transaction, set clock, bit order, data mode
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void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) {
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spiConfig = SPISettings(spiClock, bitOrder, dataMode);
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SPI.beginTransaction(spiConfig);
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}
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#endif // __MK20DX256__
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