123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130 |
- /**
- * 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
- *
- * 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 __MK20DX256__
-
- #include "../../inc/MarlinConfig.h"
- #include "HAL.h"
-
- #include <SPI.h>
- #include <pins_arduino.h>
- #include "spi_pins.h"
-
- static SPISettings spiConfig;
-
- /**
- * Standard SPI functions
- */
-
- // Initialize SPI bus
- void spiBegin() {
- #if PIN_EXISTS(SD_SS)
- OUT_WRITE(SD_SS_PIN, HIGH);
- #endif
- SET_OUTPUT(SD_SCK_PIN);
- SET_INPUT(SD_MISO_PIN);
- SET_OUTPUT(SD_MOSI_PIN);
-
- #if 0 && DISABLED(SOFTWARE_SPI)
- // set SS high - may be chip select for another SPI device
- #if SET_SPI_SS_HIGH
- WRITE(SD_SS_PIN, HIGH);
- #endif
- // set a default rate
- spiInit(SPI_HALF_SPEED); // 1
- #endif
- }
-
- // Configure SPI for specified SPI speed
- void spiInit(uint8_t spiRate) {
- // Use data rates Marlin uses
- uint32_t clock;
- switch (spiRate) {
- case SPI_FULL_SPEED: clock = 10000000; break;
- 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 = 312500; break;
- default: clock = 4000000; // Default from the SPI library
- }
- spiConfig = SPISettings(clock, MSBFIRST, SPI_MODE0);
- SPI.begin();
- }
-
- // SPI receive a byte
- uint8_t spiRec() {
- SPI.beginTransaction(spiConfig);
- const uint8_t returnByte = SPI.transfer(0xFF);
- SPI.endTransaction();
- return returnByte;
- //SPDR = 0xFF;
- //while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
- //return SPDR;
- }
-
- // SPI read data
- void spiRead(uint8_t *buf, uint16_t nbyte) {
- SPI.beginTransaction(spiConfig);
- SPI.transfer(buf, nbyte);
- SPI.endTransaction();
- //if (nbyte-- == 0) return;
- // SPDR = 0xFF;
- //for (uint16_t i = 0; i < nbyte; i++) {
- // while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
- // buf[i] = SPDR;
- // SPDR = 0xFF;
- //}
- //while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
- //buf[nbyte] = SPDR;
- }
-
- // SPI send a byte
- void spiSend(uint8_t b) {
- SPI.beginTransaction(spiConfig);
- SPI.transfer(b);
- SPI.endTransaction();
- //SPDR = b;
- //while (!TEST(SPSR, SPIF)) { /* nada */ }
- }
-
- // SPI send block
- void spiSendBlock(uint8_t token, const uint8_t *buf) {
- SPI.beginTransaction(spiConfig);
- SPDR = token;
- for (uint16_t i = 0; i < 512; i += 2) {
- while (!TEST(SPSR, SPIF)) { /* nada */ };
- SPDR = buf[i];
- while (!TEST(SPSR, SPIF)) { /* nada */ };
- SPDR = buf[i + 1];
- }
- while (!TEST(SPSR, SPIF)) { /* nada */ };
- 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 // __MK20DX256__
|