From 25ed1bd135ef18a162b2c4cc933479ebe70dfed6 Mon Sep 17 00:00:00 2001
From: openshwprojects <85486843+openshwprojects@users.noreply.github.com>
Date: Thu, 19 Jun 2025 00:55:08 +0200
Subject: [PATCH] merge old Max31855 driver (#1403)

* MAX31855

* tabl

* fx

* fx

* test

* try

* fx

* statics

* defines

* aa

* dd

* fx

* fixces

* Update obk_config.h
---
 sdk/OpenW600              |  2 +-
 src/driver/drv_local.h    |  3 ++
 src/driver/drv_main.c     |  7 +++
 src/driver/drv_max31855.c | 98 +++++++++++++++++++++++++++++++++++++++
 src/driver/drv_max6675.c  |  8 ++--
 src/obk_config.h          |  2 +
 6 files changed, 115 insertions(+), 5 deletions(-)
 create mode 100644 src/driver/drv_max31855.c

diff --git a/sdk/OpenW600 b/sdk/OpenW600
index 8111457a6..ad8f51d06 160000
--- a/sdk/OpenW600
+++ b/sdk/OpenW600
@@ -1 +1 @@
-Subproject commit 8111457a6f988e80a9801772d244d1c586590292
+Subproject commit ad8f51d064a78465ec1845287cf19c3a24c655b8
diff --git a/src/driver/drv_local.h b/src/driver/drv_local.h
index 4bbcf4666..aa17c2c6a 100644
--- a/src/driver/drv_local.h
+++ b/src/driver/drv_local.h
@@ -168,6 +168,9 @@ void RN8029_RunEverySecond(void);
 void MAX6675_Init(void);
 void MAX6675_RunEverySecond(void);
 
+void MAX31855_Init();
+void MAX31855_RunEverySecond();
+
 void PWMG_Init();
 
 void Freeze_Init();
diff --git a/src/driver/drv_main.c b/src/driver/drv_main.c
index b5184a7b7..23e5c6145 100644
--- a/src/driver/drv_main.c
+++ b/src/driver/drv_main.c
@@ -222,6 +222,13 @@ static driver_t g_drivers[] = {
 	//drvdetail:"requires":""}
 	{ "MAX6675",	MAX6675_Init,		MAX6675_RunEverySecond,			NULL, NULL, NULL, NULL, NULL, false },
 #endif
+#if ENABLE_DRIVER_MAX31855
+	//drvdetail:{"name":"MAX31855",
+	//drvdetail:"title":"TODO",
+	//drvdetail:"descr":"T",
+	//drvdetail:"requires":""}
+	{ "MAX31855",	MAX31855_Init,		MAX31855_RunEverySecond,			NULL, NULL, NULL, NULL, false },
+#endif
 #if ENABLE_DRIVER_PT6523
 	//drvdetail:{"name":"PT6523",
 	//drvdetail:"title":"TODO",
diff --git a/src/driver/drv_max31855.c b/src/driver/drv_max31855.c
new file mode 100644
index 000000000..1c4c52735
--- /dev/null
+++ b/src/driver/drv_max31855.c
@@ -0,0 +1,98 @@
+// NOTE: based on https://github.com/adafruit/MAX31855-library/blob/master/MAX31855.cpp public domain
+#include "../new_common.h"
+#include "../new_pins.h"
+#include "../new_cfg.h"
+// Commands register, execution API and cmd tokenizer
+#include "../cmnds/cmd_public.h"
+#include "../mqtt/new_mqtt.h"
+#include "../logging/logging.h"
+#include "drv_local.h"
+#include "../hal/hal_pins.h"
+
+static int port_cs = 24;
+static int sclk = 26;
+static int miso = 6;
+static int targetChannel = -1;
+
+#define MAX31855_THERMOCOUPLE_RESOLUTION    0.25   //in °C per dac step
+#define MAX31855_COLD_JUNCTION_RESOLUTION   0.0625 //in °C per dac step
+
+static int stage = 0;
+int MAX31855_ReadRaw(void) {
+	int i;
+	int d = 0;
+
+	//	delay_ms(100);
+	HAL_PIN_SetOutputValue(port_cs, 0);
+	usleep(10);
+	for (i = 31; i >= 0; i--) {
+		HAL_PIN_SetOutputValue(sclk, 1);
+		usleep(10);
+		if (HAL_PIN_ReadDigitalInput(miso)) {
+			d |= (1 << i);
+		}
+		HAL_PIN_SetOutputValue(sclk, 0);
+		usleep(10);
+	}
+	HAL_PIN_SetOutputValue(port_cs, 1);
+
+	return d;
+}
+
+#define bitRead(value, bit) (((value) >> (bit)) & 0x01)
+
+void MAX31855_ReadTemperature() {
+	int raw;
+
+	stage = !stage;
+
+	// request data
+	if (stage) {
+		HAL_PIN_SetOutputValue(port_cs, 0);
+		usleep(10);
+		HAL_PIN_SetOutputValue(port_cs, 1);
+		return;
+	}
+	// read data
+	raw = MAX31855_ReadRaw();
+
+	// print it like 0xFFAABBCC
+	//addLogAdv(LOG_INFO, LOG_FEATURE_MAIN, "0x%08X", raw);
+
+	if (raw == 0) {
+		addLogAdv(LOG_INFO, LOG_FEATURE_MAIN, "MAX31855 read fail");
+		return;
+	}
+
+	if (bitRead(raw, 17) == 0 && bitRead(raw, 3) == 0) {
+
+	}
+	else {
+		addLogAdv(LOG_INFO, LOG_FEATURE_MAIN, "MAX31855 bad ID");
+		return;
+	}
+
+	// clear D17..D0 bits
+	float temp = (float)(raw >> 18) * MAX31855_THERMOCOUPLE_RESOLUTION;
+	float cjTemp = (float)((raw & 0x0000FFFF) >> 4) * MAX31855_COLD_JUNCTION_RESOLUTION;
+
+	addLogAdv(LOG_INFO, LOG_FEATURE_MAIN, "T %f, cjT %f", temp, cjTemp);
+}
+void MAX31855_RunEverySecond() {
+	MAX31855_ReadTemperature();
+}
+// startDriver MAX31855 24 26 6 1
+void MAX31855_Init() {
+	port_cs = Tokenizer_GetArgIntegerDefault(1, port_cs);
+	sclk = Tokenizer_GetArgIntegerDefault(2, sclk);
+	miso = Tokenizer_GetArgIntegerDefault(3, miso);
+	targetChannel = Tokenizer_GetArgIntegerDefault(4, targetChannel);
+
+	// define pin modes
+	HAL_PIN_Setup_Output(port_cs);
+	HAL_PIN_Setup_Output(sclk);
+	HAL_PIN_Setup_Input(miso);
+
+	HAL_PIN_SetOutputValue(port_cs, 1);
+}
+
diff --git a/src/driver/drv_max6675.c b/src/driver/drv_max6675.c
index cdbf5680c..93b0ca72b 100644
--- a/src/driver/drv_max6675.c
+++ b/src/driver/drv_max6675.c
@@ -9,10 +9,10 @@
 #include "drv_local.h"
 #include "../hal/hal_pins.h"
 
-int port_cs = 24;
-int sclk = 26;
-int miso = 6;
-int targetChannel = -1;
+static int port_cs = 24;
+static int sclk = 26;
+static int miso = 6;
+static int targetChannel = -1;
 
 byte MAX6675_ReadByte(void) {
 	int i;
diff --git a/src/obk_config.h b/src/obk_config.h
index f69b5ce70..482d4b10d 100644
--- a/src/obk_config.h
+++ b/src/obk_config.h
@@ -243,6 +243,8 @@
 //#define ENABLE_I2C_MCP23017		1
 //#define ENABLE_I2C_LCD_PCF8574	1
 
+
+
 #elif PLATFORM_LN882H