Added option to display the Pi's CPU temperature.

options.txt

@@ -128,3 +128,7 @@ GraphIEC = 1
 //    Please see dmRotary.h for full implementation details.
 //
 //RotaryEncoderEnable = 1
+
+// This option will display the temperature of the Pi's CPU.
+// It should be about 52°C anything above 65°C is bad and there is something wrong with your hardware
+//DisplayTemperature = 1

src/FileBrowser.cpp

@@ -1383,7 +1383,11 @@ void FileBrowser::DisplayStatusBar()
 	u32 y = screenMain->ScaleY(STATUS_BAR_POSITION_Y);
 
 	char bufferOut[128];
+	if (options.DisplayTemperature())
+		snprintf(bufferOut, 128, "LED 0 Motor 0 Track 18.0 ATN 0 DAT 0 CLK 0 00%cC", 248);
+	else
 		snprintf(bufferOut, 128, "LED 0 Motor 0 Track 18.0 ATN 0 DAT 0 CLK 0");
+
 	screenMain->PrintText(false, x, y, bufferOut, RGBA(0, 0, 0, 0xff), RGBA(0xff, 0xff, 0xff, 0xff));
 #endif
 }

src/main.cpp

@@ -32,6 +32,7 @@ extern "C"
 #include "rpi-mailbox-interface.h"
 #include "interrupt.h"
 #include <uspi.h>
+#include "rpi-mailbox.h"
 }
 #include "InputMappings.h"
 #include "options.h"
@@ -175,6 +176,24 @@ extern "C"
 		return result == 0x80;
 	}
 
+	int GetTemperature(unsigned& value)
+	{
+		rpi_mailbox_property_t* mp;
+
+		RPI_PropertyInit();
+		RPI_PropertyAddTag(TAG_GET_TEMPERATURE);
+		RPI_PropertyProcess();
+
+		value = 0;
+		if ((mp = RPI_PropertyGet(TAG_GET_TEMPERATURE)))
+		{
+			value = mp->data.buffer_32[1];
+			return 1;
+		}
+
+		return 0;
+	}
+
 	void usDelay(unsigned nMicroSeconds)
 	{
 		unsigned before;
@@ -342,6 +361,7 @@ void UpdateScreen()
 	u32 oldTrack = 0;
 	u32 textColour = COLOUR_BLACK;
 	u32 bgColour = COLOUR_WHITE;
+	u32 oldTemp = 0;
 
 	RGBA atnColour = COLOUR_YELLOW;
 	RGBA dataColour = COLOUR_GREEN;
@@ -499,6 +519,22 @@ void UpdateScreen()
 		if (options.GraphIEC())
 			screen.DrawLineV(graphX, top3, bottom, COLOUR_BLACK);
 
+		if (options.DisplayTemperature())
+		{
+			unsigned temp;
+			if (GetTemperature(temp))
+			{
+				temp /= 1000;
+				if (temp != oldTemp)
+				{
+					oldTemp = temp;
+					//DEBUG_LOG("%0x %d %d\r\n", temp, temp, temp / 1000);
+					snprintf(tempBuffer, tempBufferSize, "%02d", temp);
+					screen.PrintText(false, 43 * 8, y, tempBuffer, textColour, bgColour);
+				}
+			}
+		}
+
 		u32 track;
 		if (emulating == EMULATING_1541)
 		{

src/options.cpp

@@ -139,6 +139,7 @@ Options::Options(void)
 	, splitIECLines(0)
 	, ignoreReset(0)
 	, autoBootFB128(0)
+	, displayTemperature(0)
 	, lowercaseBrowseModeFilenames(0)
 	, screenWidth(1024)
 	, screenHeight(768)
@@ -229,6 +230,7 @@ void Options::Process(char* buffer)
 		ELSE_CHECK_DECIMAL_OPTION(ignoreReset)
 		ELSE_CHECK_DECIMAL_OPTION(lowercaseBrowseModeFilenames)
 		ELSE_CHECK_DECIMAL_OPTION(autoBootFB128)
+		ELSE_CHECK_DECIMAL_OPTION(displayTemperature)
 		ELSE_CHECK_DECIMAL_OPTION(screenWidth)
 		ELSE_CHECK_DECIMAL_OPTION(screenHeight)
 		ELSE_CHECK_DECIMAL_OPTION(i2cBusMaster)

src/options.h

@@ -78,6 +78,8 @@ public:
 	inline unsigned int AutoBootFB128() const { return autoBootFB128; }
 	inline const char* Get128BootSectorName() const { return C128BootSectorName; }
 
+	inline unsigned int DisplayTemperature() const { return displayTemperature; }
+
 	inline unsigned int LowercaseBrowseModeFilenames() const { return lowercaseBrowseModeFilenames; }
 	DiskImage::DiskType GetNewDiskType() const;
 
@@ -138,6 +140,8 @@ private:
 	unsigned int ignoreReset;
 	unsigned int autoBootFB128;
 
+	unsigned int displayTemperature;
+
 	unsigned int lowercaseBrowseModeFilenames;
 
 	unsigned int screenWidth;

src/rpi-mailbox-interface.c

@@ -5,12 +5,13 @@
 #include "rpiHardware.h"
 #include "rpi-mailbox.h"
 #include "rpi-mailbox-interface.h"
+#include "cache.h"
 
 /* Make sure the property tag buffer is aligned to a 16-byte boundary because
    we only have 28-bits available in the property interface protocol to pass
    the address of the buffer to the VC. */
-static int pt[PROP_BUFFER_SIZE] __attribute__((aligned(16)));
-static int pt_index = 0;
+static int *pt = (int *)UNCACHED_MEM_BASE;
+static int pt_index ;
 
 //#define PRINT_PROP_DEBUG 1