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Importing Miniware's alg for tip temperature for the MHP

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Love to @g3gg0
This commit is contained in:
Ben V. Brown
2021-05-02 14:34:36 +10:00
parent 5fac16a14a
commit 018b984665
2 changed files with 22 additions and 58 deletions
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57
source/Core/BSP/MHP30/ThermoModel.cpp
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@@ -4,54 +4,19 @@
* Created on: 1 May 2021
* Author: Ralim
*/
#include "Setup.h"
#include "TipThermoModel.h"
#include "Utils.h"
#include "configuration.h"
#ifdef TEMP_uV_LOOKUP_MHP30
const uint16_t uVtoDegC[] = {
//
//
0, 0, //
397, 10, //
798, 20, ///
1203, 30, //
1612, 40, //
2023, 50, //
2436, 60, //
3225, 79, //
4013, 98, //
4756, 116, //
5491, 134, //
5694, 139, //
6339, 155, //
7021, 172, //
7859, 193, //
8619, 212, //
9383, 231, //
10153, 250, //
10930, 269, //
11712, 288, //
12499, 307, //
13290, 326, //
14084, 345, //
14881, 364, //
15680, 383, //
16482, 402, //
17285, 421, //
18091, 440, //
18898, 459, //
};
#endif
const int uVtoDegCItems = sizeof(uVtoDegC) / (2 * sizeof(uint16_t));
extern uint16_t tipSenseResistancex10Ohms;
uint32_t TipThermoModel::convertuVToDegC(uint32_t tipuVDelta) {
// For the MHP30, we are mimicing the original code and using the resistor fitted to the base of the heater head
// As such, we need to use the ADC and some pin toggling to measure this resistor
// We want to cache the value as it takes time to measure, but we also need to re-measure when the tip is inserted / removed
// We can detect the tip being inserted / removed by using the reading of that channel, as if its reporting max (0xFFFF) then the heater is not connected
return Utils::InterpolateLookupTable(uVtoDegC, uVtoDegCItems, tipuVDelta);
// For the MHP30, we are mimicing the original code and using the resistor fitted to the base of the heater head, this is measured in the isTipDisconnected() function
if (tipSenseResistancex10Ohms > 900 && tipSenseResistancex10Ohms <= 1100) {
int32_t a = ((tipSenseResistancex10Ohms / 10) + 300) * (3300000 - tipuVDelta);
int32_t b = a / 1000000;
int32_t c = tipuVDelta - b;
int32_t d = c * 243 / 1000;
return d / 10;
}
return 0xFFFF;
}

5
source/Core/Inc/configuration.h
View File

@@ -170,12 +170,11 @@
#ifdef MODEL_MHP30
#define VOLTAGE_DIV 355 // Default for MHP30
#define PID_POWER_LIMIT 65 // Sets the max pwm power limit
#define CALIBRATION_OFFSET 700 // the adc offset in uV
#define CALIBRATION_OFFSET 0 // the adc offset in uV - MHP compensates automagically
#define POWER_LIMIT 65 // 65 watts default power limit
#define MAX_POWER_LIMIT 65 //
#define POWER_LIMIT_STEPS 2 //
#define OP_AMP_GAIN_STAGE OP_AMP_GAIN_STAGE_MHP30 //
#define TEMP_uV_LOOKUP_MHP30 //
#define USB_PD_VMAX 20 // Maximum voltage for PD to negotiate
#endif
@@ -200,6 +199,6 @@ const uint8_t tipResistance = 45; // x10 ohms, 4.5 typical for ts80 tips
#endif
#ifdef MODEL_MHP30
const uint32_t tipMass = 100; // TODO
const uint32_t tipMass = 45; // TODO
const uint8_t tipResistance = 75; // x10 ohms, ~6 typical
#endif