when'd i last commit this pos?

2026-02-09 14:40:34 -06:00
parent fc43fbe4b0
commit 23f6331ba2
94 changed files with 14427 additions and 12178 deletions
@@ -0,0 +1,71 @@
+#!/opt/srasenv/bin/python3
+"""
+Test temperature scaling calculations.
+"""
+
+import math
+
+# Constants
+ADC_TO_VOLTS = 0.000244140625
+STEINHART_A = 0.0011279
+STEINHART_B = 0.00023429
+STEINHART_C = 8.7298e-8
+
+def test_main_temp_calculation(raw_adc):
+    """Test main temperature calculation with different circuit assumptions."""
+
+    print(f"\n{'='*60}")
+    print(f"Testing Main Temperature with RAW ADC = {raw_adc}")
+    print(f"{'='*60}")
+
+    v_thermistor = raw_adc * ADC_TO_VOLTS
+    print(f"V_thermistor = {v_thermistor:.6f} V")
+
+    # Try different circuit configurations
+    configs = [
+        (10000, 5.0, "10kΩ series, 5V ref"),
+        (10000, 3.3, "10kΩ series, 3.3V ref"),
+        (100000, 5.0, "100kΩ series, 5V ref"),
+        (10000, 2.5, "10kΩ series, 2.5V ref"),
+    ]
+
+    for r_series, vref, desc in configs:
+        print(f"\n{desc}:")
+        print(f"  R_series = {r_series} Ω, Vref = {vref} V")
+
+        if v_thermistor >= vref:
+            print(f"  ERROR: V_thermistor >= Vref")
+            continue
+
+        r_thermistor = r_series * v_thermistor / (vref - v_thermistor)
+        print(f"  R_thermistor = {r_thermistor:.2f} Ω")
+
+        if r_thermistor <= 0:
+            print(f"  ERROR: Invalid resistance")
+            continue
+
+        # Steinhart-Hart
+        ln_r = math.log(r_thermistor)
+        inv_t = STEINHART_A + STEINHART_B * ln_r + STEINHART_C * (ln_r ** 3)
+        temp_k = 1.0 / inv_t
+        temp_c = temp_k - 273.15
+
+        print(f"  ln(R) = {ln_r:.6f}")
+        print(f"  Temperature = {temp_c:.2f} °C")
+
+def test_current_scaling(raw_adc):
+    """Test current scaling."""
+    print(f"\n{'='*60}")
+    print(f"Testing Current Scaling with RAW ADC = {raw_adc}")
+    print(f"{'='*60}")
+
+    current = raw_adc * 12.0 * ADC_TO_VOLTS
+    print(f"Current = {current:.6f} A")
+
+if __name__ == '__main__':
+    # Test with the reported raw values
+    test_main_temp_calculation(2)
+    test_main_temp_calculation(3)
+    test_current_scaling(0)
+    test_current_scaling(100)
+    test_current_scaling(4095)