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⏪️ Revert MAX31865 recent changes (#22660)

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This commit is contained in:
ellensp
2021-08-31 15:40:49 +12:00
committed by Scott Lahteine
parent b21d62543f
commit 19353fc98c
4 changed files with 29 additions and 22 deletions
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38
Marlin/src/libs/MAX31865.cpp
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@ -44,12 +44,11 @@
//#define MAX31865_DEBUG
//#define MAX31865_DEBUG_SPI
#include <SoftwareSPI.h>
#include "../inc/MarlinConfig.h"
#if HAS_MAX31865 && !LIB_USR_MAX31865
#if HAS_MAX31865 && !USE_ADAFRUIT_MAX31865
//#include <SoftwareSPI.h> // TODO: switch to SPIclass/SoftSPI
#include "MAX31865.h"
// The maximum speed the MAX31865 can do is 5 MHz
@ -62,7 +61,7 @@ SPISettings MAX31865::spiConfig = SPISettings(
500000
#endif
, MSBFIRST
, SPI_MODE1 // CPOL0 CPHA1
, SPI_MODE_1 // CPOL0 CPHA1
);
#ifndef LARGE_PINMAP
@ -153,15 +152,17 @@ void MAX31865::begin(max31865_numwires_t wires, float zero, float ref) {
OUT_WRITE(_cs, HIGH);
if (_sclk != TERN(LARGE_PINMAP, -1UL, -1)) {
// define pin modes for Software SPI
// Define pin modes for Software SPI
#ifdef MAX31865_DEBUG
SERIAL_ECHOLN("Initializing MAX31865 Software SPI");
#endif
swSpiBegin(_sclk, _miso, _mosi);
} else {
// start and configure hardware SPI
OUT_WRITE(_sclk, LOW);
SET_OUTPUT(_mosi);
SET_INPUT(_miso);
}
else {
// Start and configure hardware SPI
#ifdef MAX31865_DEBUG
SERIAL_ECHOLN("Initializing MAX31865 Hardware SPI");
#endif
@ -169,9 +170,6 @@ void MAX31865::begin(max31865_numwires_t wires, float zero, float ref) {
SPI.begin();
}
// SPI Begin must be called first, then init
_spi_speed = swSpiInit(SPI_QUARTER_SPEED, _sclk, _mosi);
setWires(wires);
enableBias(false);
autoConvert(false);
@ -486,7 +484,17 @@ uint8_t MAX31865::spixfer(uint8_t x) {
if (_sclk == TERN(LARGE_PINMAP, -1UL, -1))
return SPI.transfer(x);
return swSpiTransfer(x, _spi_speed, _sclk, _miso, _mosi);
uint8_t reply = 0;
for (int i = 7; i >= 0; i--) {
reply <<= 1;
WRITE(_sclk, HIGH);
WRITE(_mosi, x & (1 << i));
WRITE(_sclk, LOW);
if (READ(_miso))
reply |= 1;
}
return reply;
}
#endif // HAS_MAX31865 && !LIB_USR_MAX31865
#endif // HAS_MAX31865 && !USE_ADAFRUIT_MAX31865

1
Marlin/src/libs/MAX31865.h
View File

@ -90,7 +90,6 @@ private:
static SPISettings spiConfig;
TERN(LARGE_PINMAP, uint32_t, uint8_t) _sclk, _miso, _mosi, _cs;
uint8_t _spi_speed;
float Rzero, Rref;
void setConfig(uint8_t config, bool enable);