Moved remotely

git-svn-id: file:///srv/dev-disk-by-uuid-17e88007-4d0c-45e0-8757-cacfcc458630/repositories/svn/Diplomarbeit@111 9fe90eed-be63-e94b-8204-d34ff4c2ff93
2009-01-12 08:38:04 +00:00
parent a0ccd623c6
commit 6880a47b46
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+/* ---------------------------------------------------------------------------
+ * appImage.c - v0.1                                (c) 2008 Micro-key bv
+ * ---------------------------------------------------------------------------
+ * Micro-key bv
+ * Industrieweg 28, 9804 TG Noordhorn
+ * Postbus 92, 9800 AB Zuidhorn
+ * The Netherlands
+ * Tel: +31 594 503020
+ * Fax: +31 594 505825
+ * Email: support@microkey.nl  
+ * Web: www.microkey.nl
+ * ---------------------------------------------------------------------------
+ * Description: 
+ * ---------------------------------------------------------------------------
+ * Version(s):  0.1, Feb 12, 2008, FSc
+ *                   Creation.
+ * ---------------------------------------------------------------------------
+ */
+
+/* ---------------------------------------------------------------------------
+ * System include files
+ * ---------------------------------------------------------------------------
+ */
+
+/* ---------------------------------------------------------------------------
+ * Application include files
+ * ---------------------------------------------------------------------------
+ */
+#include "types.h"
+#include "appImage.h"
+#include "LPC23xx.h"
+#include "crc.h"
+#include "IspProtocol.h"
+#include "bootloader.h"
+
+/* ---------------------------------------------------------------------------
+ * Local constant and macro definitions
+ * ---------------------------------------------------------------------------
+ */
+typedef void (*t_application_startup)(void);
+
+#define APPI_FLASH_START_ADDR    0x5000
+#define APPI_FLASH_END_ADDR      0x7E000
+#define APPI_C_ENTRY_OFFS        0x0020    
+#define APPI_IMAGE_LENGTH_OFFS   0x0008
+#define APPI_IMAGE_CRC_OFFS      0x000C
+
+/* ---------------------------------------------------------------------------
+ * Global variable definitions
+ * ---------------------------------------------------------------------------
+ */
+
+/* ---------------------------------------------------------------------------
+ * Local variable definitions
+ * ---------------------------------------------------------------------------
+ */
+
+/* ---------------------------------------------------------------------------
+ * Local function definitions
+ * ---------------------------------------------------------------------------
+ */
+void appiCalculateCrc( UINT32 imageLength, UINT16 *crc );
+
+
+/** \brief Checks if the Application image requests a Image update
+ * 
+ * When the application image wants to start an image update, it sets
+ * a pattern on a known RAM-location and resets the CPU. Now the bootloader
+ * can verify this pattern.
+ * 
+ * \retval TRUE Application did request an update
+ * \retval FALSE Application did not request an update
+ */ 
+BOOLEAN appiApplicationRequestsUpdate()
+{
+	if (blGetBootmode() == STAY_IN_BOOTLOADER)
+	{
+		return TRUE;
+	}
+	else
+	{
+		return FALSE;
+	}
+}
+
+
+ /** \brief Checks if a valid Application image.
+  * 
+  * \retval TRUE Flash contains a valid Application image
+  * \retval FALSE Flash doesn't contain a valid Application image
+  */
+BOOLEAN appiValidAppImageAvail()
+{
+	static UINT32 imageSize = 0;
+	static UINT16 recordedCrc = 0;
+	UINT8 index;
+	static UINT16 calculatedCrc;
+	
+	index = APPI_IMAGE_LENGTH_OFFS;
+	imageSize = ispGet32bit((UINT8 *)APPI_FLASH_START_ADDR, &index); 
+	recordedCrc = ispGet16bit((UINT8 *)APPI_FLASH_START_ADDR, &index);
+ 
+	if (    (imageSize >= 100) 
+		 && (imageSize <= (APPI_FLASH_START_ADDR - APPI_FLASH_END_ADDR))
+	   )
+	{
+		appiCalculateCrc(imageSize, &calculatedCrc);
+	
+		if (recordedCrc != calculatedCrc)
+		{
+			return FALSE;
+		}
+		else
+		{
+			return TRUE;
+		}
+	}
+	else
+	{
+		if (imageSize == 0)
+		{
+			// escape for debugging
+			return TRUE;
+		}
+		else
+		{
+			return FALSE;
+		}
+			
+	}
+}
+
+/** \brief Jumps to the Application image. Function won't return.
+ */   
+void appiJumpToAppImage()
+{
+	unsigned int application_start_addr = APPI_FLASH_START_ADDR + APPI_C_ENTRY_OFFS;
+	
+	blResetBootmode(); 
+
+    DISABLE_INTERRUPTS();
+	
+    ((t_application_startup)application_start_addr)();
+}
+
+void appiCalculateCrc( UINT32 imageLength, UINT16 *crc )
+{
+	UINT8 *image = (UINT8 *)(APPI_FLASH_START_ADDR);
+	*crc = 0;
+
+	// Calculate Crc over part before Length & CRC
+	*crc = crcCalc(image, APPI_IMAGE_LENGTH_OFFS, *crc);
+
+	// Calculate Crc over part after Length & CRC
+	image = (UINT8 *)(APPI_FLASH_START_ADDR + APPI_IMAGE_CRC_OFFS + 4);
+	*crc = crcCalc(image, imageLength - (APPI_IMAGE_CRC_OFFS + 4), *crc);
+}
+