Revert "latest :)"

This reverts commit 288a1ccd09.
2024-01-20 15:04:46 +01:00
parent 4b9e47433f
commit 8f2516faff
4218 changed files with 1345255 additions and 209 deletions
@@ -0,0 +1,73 @@
+// this library is public domain. enjoy!
+// www.ladyada.net/learn/sensors/thermocouple
+
+#include <avr/pgmspace.h>
+#include <util/delay.h>
+#include <stdlib.h>
+#include "max6675_local.h"
+
+MAX6675::MAX6675(int8_t SCLK, int8_t CS, int8_t MISO)
+{
+  sclk = SCLK;
+  cs = CS;
+  miso = MISO;
+
+  //define pin modes
+  pinMode(cs, OUTPUT);
+  pinMode(sclk, OUTPUT);
+  pinMode(miso, INPUT);
+
+  digitalWrite(cs, HIGH);
+}
+double MAX6675::readCelsius(void)
+{
+
+  uint16_t v;
+
+  digitalWrite(cs, LOW);
+  _delay_ms(1);
+
+  v = spiread();
+  v <<= 8;
+  v |= spiread();
+
+  digitalWrite(cs, HIGH);
+
+  if (v & 0x4)
+  {
+    // uh oh, no thermocouple attached!
+    return NAN;
+    //return -100;
+  }
+
+  v >>= 3;
+
+  return v * 0.25;
+}
+
+double MAX6675::readFarenheit(void)
+{
+  return readCelsius() * 9.0 / 5.0 + 32;
+}
+
+byte MAX6675::spiread(void)
+{
+  int i;
+  byte d = 0;
+
+  for (i = 7; i >= 0; i--)
+  {
+    digitalWrite(sclk, LOW);
+    _delay_ms(1);
+    if (digitalRead(miso))
+    {
+      //set the bit to 0 no matter what
+      d |= (1 << i);
+    }
+
+    digitalWrite(sclk, HIGH);
+    _delay_ms(1);
+  }
+
+  return d;
+}