131 lines
3.6 KiB
C++
131 lines
3.6 KiB
C++
/**
|
|
* 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 "HAL.h"
|
|
#include <SPI.h>
|
|
#include <pins_arduino.h>
|
|
#include "spi_pins.h"
|
|
#include "../../core/macros.h"
|
|
|
|
static SPISettings spiConfig;
|
|
|
|
/**
|
|
* Standard SPI functions
|
|
*/
|
|
|
|
// Initialize SPI bus
|
|
void spiBegin() {
|
|
#if !PIN_EXISTS(SS)
|
|
#error "SS_PIN not defined!"
|
|
#endif
|
|
OUT_WRITE(SS_PIN, HIGH);
|
|
SET_OUTPUT(SCK_PIN);
|
|
SET_INPUT(MISO_PIN);
|
|
SET_OUTPUT(MOSI_PIN);
|
|
|
|
#if 0 && DISABLED(SOFTWARE_SPI)
|
|
// set SS high - may be chip select for another SPI device
|
|
#if SET_SPI_SS_HIGH
|
|
WRITE(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 libarary
|
|
}
|
|
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__
|