mirror of
https://github.com/RobTillaart/Arduino.git
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92 lines
2.0 KiB
C++
92 lines
2.0 KiB
C++
//
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// FILE: max31855_sw_SPI.ino
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// AUTHOR: Rob Tillaart
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// VERSION: 0.4.1
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// PURPOSE: thermocouple lib demo application
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// DATE: 2021-08-11
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// URL: https://github.com/RobTillaart/MAX31855_RT
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//
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#include "MAX31855.h"
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// read() timing UNO timing ESP32 |
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//---------------------------------------------
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// HWSPI 16000000 ~68 us ~16 us
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// HWSPI 4000000 ~72 us ~23 us
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// HWSPI 1000000 ~100 us ~51 us
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// HWSPI 500000 ~128 us ~89 us
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// SWSPI bitbang ~500 us ~17 us
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// | HW SPI | UNO | ESP32 | ESP32 |
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// | | | VSPI | HSPI |
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// |:---------|:-----:|:-------:|:-------:|
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// | CLOCKPIN | 13 | 18 | 14 |
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// | MISO | 12 | 19 | 12 |
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// | MOSI | 11 | 23 | 13 | * not used...
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// | SELECT | eg. 4 | 5 | 15 | * can be others too.
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const int csPin = 15;
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const int clkPin = 14;
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const int dataPin = 12;
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uint32_t start, stop;
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MAX31855 tc;
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void setup()
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{
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Serial.begin(115200);
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Serial.println(__FILE__);
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Serial.print("Start max31855_demo0: ");
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Serial.println(MAX31855_VERSION);
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Serial.println();
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tc.begin(clkPin, csPin, dataPin); // sw SPI
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tc.setSWSPIdelay(4); // add 4 us per bit to improve signal.
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}
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void loop()
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{
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start = micros();
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int status = tc.read();
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stop = micros();
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Serial.println();
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Serial.print("time:\t\t");
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Serial.println(stop - start);
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Serial.print("stat:\t\t");
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Serial.println(status);
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uint32_t raw = tc.getRawData();
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Serial.print("raw:\t\t");
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uint32_t mask = 0x80000000;
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for (int i = 0; i < 32; i++)
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{
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if ((i > 0) && (i % 4 == 0)) Serial.print(" ");
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Serial.print((raw & mask) ? 1 : 0);
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mask >>= 1;
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}
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Serial.println();
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float internal = tc.getInternal();
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Serial.print("internal:\t");
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Serial.println(internal, 3);
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float temp = tc.getTemperature();
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Serial.print("temperature:\t");
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Serial.println(temp, 3);
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delay(1000);
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}
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// -- END OF FILE --
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