introduce new feature: BOOTLOADER_HIDDENEXITCOMMAND

[pub/USBaspLoader.git] / firmware / bootloaderconfig.h

diff --git a/firmware/bootloaderconfig.h b/firmware/bootloaderconfig.h
index 9072a09..7d173d5 100644 (file)
--- a/firmware/bootloaderconfig.h
+++ b/firmware/bootloaderconfig.h
@@ -3,11 +3,10 @@
  * Author: Christian Starkjohann
  * Author: Stephan Baerwolf
  * Creation Date: 2007-12-08
  * Author: Christian Starkjohann
  * Author: Stephan Baerwolf
  * Creation Date: 2007-12-08

- * Modification Date: 2012-11-10
+ * Modification Date: 2013-03-31

  * Tabsize: 4
  * Copyright: (c) 2007 by OBJECTIVE DEVELOPMENT Software GmbH
  * License: GNU GPL v2 (see License.txt)
  * Tabsize: 4
  * Copyright: (c) 2007 by OBJECTIVE DEVELOPMENT Software GmbH
  * License: GNU GPL v2 (see License.txt)

- * This Revision: $Id: bootloaderconfig.h 729 2009-03-20 09:03:58Z cs $

  */
 
 #ifndef __bootloaderconfig_h_included__
  */
 
 #ifndef __bootloaderconfig_h_included__


@@ -57,14 +56,28 @@ these macros are defined, the boot loader usees them.
 /* This is the port where the USB bus is connected. When you configure it to
  * "B", the registers PORTB, PINB and DDRB will be used.
  */
 /* This is the port where the USB bus is connected. When you configure it to
  * "B", the registers PORTB, PINB and DDRB will be used.
  */

+#ifndef USB_CFG_INTPORT_BIT
+  #if (defined(__AVR_ATmega640__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2560__) || defined(__AVR_ATmega2561__))
+    #define USB_CFG_INTPORT_BIT 0
+  #else
+    #define USB_CFG_INTPORT_BIT 2
+  #endif
+#endif
+/* Not all devices have their INT0 on PD2.
+ * Since "INT0" and "USB_CFG_DPLUS_BIT" should get the same signals,
+ * map them to be ideally the same:
+ * So abstract "USB_CFG_DPLUS_BIT" to this one here.
+ */
+

 #ifndef USB_CFG_DMINUS_BIT
 #ifndef USB_CFG_DMINUS_BIT

-  #define USB_CFG_DMINUS_BIT      6    /* old value was 4 */
+  /* This is Revision 3 and later (where PD6 and PD7 were swapped */
+  #define USB_CFG_DMINUS_BIT      7    /* Rev.2 and previous was 6 */

 #endif
 /* This is the bit number in USB_CFG_IOPORT where the USB D- line is connected.
  * This may be any bit in the port.
  */
 #ifndef USB_CFG_DPLUS_BIT
 #endif
 /* This is the bit number in USB_CFG_IOPORT where the USB D- line is connected.
  * This may be any bit in the port.
  */
 #ifndef USB_CFG_DPLUS_BIT

-  #define USB_CFG_DPLUS_BIT       2
+  #define USB_CFG_DPLUS_BIT       USB_CFG_INTPORT_BIT

 #endif
 /* This is the bit number in USB_CFG_IOPORT where the USB D+ line is connected.
  * This may be any bit in the port. Please note that D+ must also be connected
 #endif
 /* This is the bit number in USB_CFG_IOPORT where the USB D+ line is connected.
  * This may be any bit in the port. Please note that D+ must also be connected


@@ -77,7 +90,8 @@ these macros are defined, the boot loader usees them.
  * jumper is connected to this port
  */
 #ifndef JUMPER_BIT
  * jumper is connected to this port
  */
 #ifndef JUMPER_BIT

-  #define JUMPER_BIT           7       /* old value was 0 */
+  /* This is Revision 3 and later (where PD6 and PD7 were swapped */
+  #define JUMPER_BIT           6       /* Rev.2 and previous was 7 */

 #endif
 /* 
  * jumper is connected to this bit in port "JUMPER_PORT", active low
 #endif
 /* 
  * jumper is connected to this bit in port "JUMPER_PORT", active low


@@ -187,14 +201,23 @@ these macros are defined, the boot loader usees them.
  * WITH REQUESTING A MAGIC YOU AGREE TO PUBLISHED YOUR DATA SEND WITHIN THE REQUEST 
  */
 
  * WITH REQUESTING A MAGIC YOU AGREE TO PUBLISHED YOUR DATA SEND WITHIN THE REQUEST 
  */
 

-#define HAVE_EEPROM_PAGED_ACCESS    1
+#ifndef CONFIG_NO__EEPROM_PAGED_ACCESS
+#      define HAVE_EEPROM_PAGED_ACCESS    1
+#else
+#      define HAVE_EEPROM_PAGED_ACCESS    0
+#endif

 /* If HAVE_EEPROM_PAGED_ACCESS is defined to 1, page mode access to EEPROM is
  * compiled in. Whether page mode or byte mode access is used by AVRDUDE
  * depends on the target device. Page mode is only used if the device supports
  * it, e.g. for the ATMega88, 168 etc. You can save quite a bit of memory by
  * disabling page mode EEPROM access. Costs ~ 138 bytes.
  */
 /* If HAVE_EEPROM_PAGED_ACCESS is defined to 1, page mode access to EEPROM is
  * compiled in. Whether page mode or byte mode access is used by AVRDUDE
  * depends on the target device. Page mode is only used if the device supports
  * it, e.g. for the ATMega88, 168 etc. You can save quite a bit of memory by
  * disabling page mode EEPROM access. Costs ~ 138 bytes.
  */

-#define HAVE_EEPROM_BYTE_ACCESS     1
+
+#ifndef CONFIG_NO__EEPROM_BYTE_ACCESS
+#      define HAVE_EEPROM_BYTE_ACCESS     1
+#else
+#      define HAVE_EEPROM_BYTE_ACCESS     0
+#endif

 /* If HAVE_EEPROM_BYTE_ACCESS is defined to 1, byte mode access to EEPROM is
  * compiled in. Byte mode is only used if the device (as identified by its
  * signature) does not support page mode for EEPROM. It is required for
 /* If HAVE_EEPROM_BYTE_ACCESS is defined to 1, byte mode access to EEPROM is
  * compiled in. Byte mode is only used if the device (as identified by its
  * signature) does not support page mode for EEPROM. It is required for


@@ -202,23 +225,39 @@ these macros are defined, the boot loader usees them.
  */
 
 #ifndef CONFIG_NO__BOOTLOADER_CAN_EXIT
  */
 
 #ifndef CONFIG_NO__BOOTLOADER_CAN_EXIT

-  #define BOOTLOADER_CAN_EXIT         1
+#      define BOOTLOADER_CAN_EXIT         1

 #else
 #else

-  #define BOOTLOADER_CAN_EXIT         0
+#      define BOOTLOADER_CAN_EXIT         0

 #endif
 /* If this macro is defined to 1, the boot loader will exit shortly after the
  * programmer closes the connection to the device. Costs extra bytes.
  */
 
 #endif
 /* If this macro is defined to 1, the boot loader will exit shortly after the
  * programmer closes the connection to the device. Costs extra bytes.
  */
 

-#define HAVE_CHIP_ERASE             0
+#ifndef CONFIG_NO__CHIP_ERASE
+#      define HAVE_CHIP_ERASE             1
+#else
+#      define HAVE_CHIP_ERASE             0
+#endif

 /* If this macro is defined to 1, the boot loader implements the Chip Erase
  * ISP command. Otherwise pages are erased on demand before they are written.
  */
 /* If this macro is defined to 1, the boot loader implements the Chip Erase
  * ISP command. Otherwise pages are erased on demand before they are written.
  */

+#ifndef CONFIG_NO__ONDEMAND_PAGEERASE
+#      define HAVE_ONDEMAND_PAGEERASE            1
+#else
+#      define HAVE_ONDEMAND_PAGEERASE            0
+#endif
+/* Even if "HAVE_CHIP_ERASE" is avtivated - enabling the "HAVE_ONDEMAND_PAGEERASE"-
+ * feature the bootloader will erase pages on demand short before writing new data
+ * to it.
+ * If pages are not erase before reprogram (for example because user call avrdude -D)
+ * then data may become inconsistent since writing only allow to unset bits in the flash.
+ * This feature may prevent this...
+ */

 
 #ifndef CONFIG_NO__NEED_WATCHDOG
 
 #ifndef CONFIG_NO__NEED_WATCHDOG

-  #define NEED_WATCHDOG                1
+#      define NEED_WATCHDOG            1

 #else
 #else

-  #define NEED_WATCHDOG                0
+#      define NEED_WATCHDOG            0

 #endif
 /* ATTANTION: This macro MUST BE 1, if the MCU has reset enabled watchdog (WDTON is 0).
  * If this macro is defined to 1, the bootloader implements an additional "wdt_disable()"
 #endif
 /* ATTANTION: This macro MUST BE 1, if the MCU has reset enabled watchdog (WDTON is 0).
  * If this macro is defined to 1, the bootloader implements an additional "wdt_disable()"


@@ -228,9 +267,9 @@ these macros are defined, the boot loader usees them.
  */
 
 #ifndef CONFIG_NO__PRECISESLEEP
  */
 
 #ifndef CONFIG_NO__PRECISESLEEP

-  #define HAVE_UNPRECISEWAIT   0
+#      define HAVE_UNPRECISEWAIT       0

 #else
 #else

-  #define HAVE_UNPRECISEWAIT   1
+#      define HAVE_UNPRECISEWAIT       1

 #endif
 /* This macro enables hand-optimized assembler code
  * instead to use _sleep_ms for delaying USB enumeration.
 #endif
 /* This macro enables hand-optimized assembler code
  * instead to use _sleep_ms for delaying USB enumeration.


@@ -239,13 +278,62 @@ these macros are defined, the boot loader usees them.
  * Therefore it is very small, which saves some PROGMEM bytes!
  */
 
  * Therefore it is very small, which saves some PROGMEM bytes!
  */
 

-#define HAVE_FLASH_BYTE_READACCESS     1
+#ifndef CONFIG_NO__FLASH_BYTE_READACCESS
+#      define HAVE_FLASH_BYTE_READACCESS       1
+#else
+#      define HAVE_FLASH_BYTE_READACCESS       0
+#endif

 /* If HAVE_FLASH_BYTE_READACCESS is defined to 1, byte mode access to FLASH is
  * compiled in. Byte mode sometimes might be used by some programming softwares
  * (avrdude in terminal mode). Without this feature the device would return "0"
  * instead the right content of the flash memory.
  */
 
 /* If HAVE_FLASH_BYTE_READACCESS is defined to 1, byte mode access to FLASH is
  * compiled in. Byte mode sometimes might be used by some programming softwares
  * (avrdude in terminal mode). Without this feature the device would return "0"
  * instead the right content of the flash memory.
  */
 

+#ifdef CONFIG_USE__EXCESSIVE_ASSEMBLER
+#      define USE_EXCESSIVE_ASSEMBLER          1
+#else
+#      define USE_EXCESSIVE_ASSEMBLER          0
+#endif
+/* This macro enables large codeareas of hand-optimized assembler code.
+ * WARNING:
+ * It will only work properly on devices with <64k of flash memory and SRAM.
+ * Some configuration macros (when changed) may not be applied correctly
+ * (since their behaviour is raced within asm)!
+ * Nevertheless this feature saves lots of memory.
+ */
+
+#ifdef CONFIG_USE__BOOTUP_CLEARRAM
+#      define USE_BOOTUP_CLEARRAM              1
+#else
+#      define USE_BOOTUP_CLEARRAM              0
+#endif
+/* This macro enables some (init3) code, executed at bootup.
+ * This codefragment will safely overwrite the whole SRAM with "0"
+ * (except registers and IO), since RESET will NOT clear old RAM content.
+ */
+
+#ifdef CONFIG_NO__BOOTLOADERENTRY_FROMSOFTWARE
+#      define HAVE_BOOTLOADERENTRY_FROMSOFTWARE 0
+#else
+#      define HAVE_BOOTLOADERENTRY_FROMSOFTWARE 1
+#endif
+/* 
+ * Enable firmware to boot the bootloader without
+ * user intervention
+ */
+
+#ifdef CONFIG_NO__BOOTLOADER_HIDDENEXITCOMMAND
+#      define HAVE_BOOTLOADER_HIDDENEXITCOMMAND 0
+#else
+#      define HAVE_BOOTLOADER_HIDDENEXITCOMMAND 0xff
+#endif
+/* 
+ * When enabling "BOOTLOADER_HIDDENEXITCOMMAND", then
+ * sending the RAW-ISP command "0xff 0xXX 0xXX 0xXX"
+ * will cause the bootloader to start the firmware
+ * as soon as the programming software disconnects.
+ */
+

 //#define SIGNATURE_BYTES             0x1e, 0x93, 0x07, 0     /* ATMega8 */
 /* This macro defines the signature bytes returned by the emulated USBasp to
  * the programmer software. They should match the actual device at least in
 //#define SIGNATURE_BYTES             0x1e, 0x93, 0x07, 0     /* ATMega8 */
 /* This macro defines the signature bytes returned by the emulated USBasp to
  * the programmer software. They should match the actual device at least in


@@ -270,6 +358,10 @@ these macros are defined, the boot loader usees them.
 #   define MCUCSR   MCUSR
 #endif
 
 #   define MCUCSR   MCUSR
 #endif
 

+/* WARNING:
+ * following commands and macros may not be evaluated properly when 'USE_EXCESSIVE_ASSEMBLER"
+ */
+

 static inline void  bootLoaderInit(void)
 {
     PIN_DDR(JUMPER_PORT)  = 0;
 static inline void  bootLoaderInit(void)
 {
     PIN_DDR(JUMPER_PORT)  = 0;


@@ -278,8 +370,6 @@ static inline void  bootLoaderInit(void)
 //     deactivated by Stephan - reset after each avrdude op is annoing!
 //     if(!(MCUCSR & (1 << EXTRF)))    /* If this was not an external reset, ignore */
 //         leaveBootloader();
 //     deactivated by Stephan - reset after each avrdude op is annoing!
 //     if(!(MCUCSR & (1 << EXTRF)))    /* If this was not an external reset, ignore */
 //         leaveBootloader();

-
-    MCUCSR = 0;                     /* clear all reset flags for next time */

 }
 
 static inline void  bootLoaderExit(void)
 }
 
 static inline void  bootLoaderExit(void)


@@ -287,7 +377,42 @@ static inline void  bootLoaderExit(void)
     PIN_PORT(JUMPER_PORT) = 0;         /* undo bootLoaderInit() changes */
 }
 
     PIN_PORT(JUMPER_PORT) = 0;         /* undo bootLoaderInit() changes */
 }
 

-#define bootLoaderCondition()          ((PIN_PIN(JUMPER_PORT) & (1 << PIN(JUMPER_PORT, JUMPER_BIT))) == 0)
+
+#define bootLoaderConditionSimple()    ((PIN_PIN(JUMPER_PORT) & (1 << PIN(JUMPER_PORT, JUMPER_BIT))) == 0)
+
+#if (HAVE_BOOTLOADERENTRY_FROMSOFTWARE)
+/*
+ * How it works: The idea
+ * 
+ * During normal C initialization, the stackpointer (SP) always is pointed to
+ * SRAMs end, where it grows towards RAMSTART.
+ * 
+ * Check if last possible pushed address in stack is bootloaders address. 
+ * Store investigation result into "__BOOTLOADERENTRY_FROMSOFTWARE__bootup_RAMEND_doesmatch"
+ * Result will be "0xff" in case of mismatch.
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#define __BOOTLOADERENTRY_FROMSOFTWARE__EXPECTEDADDRESS        (BOOTLOADER_ADDRESS>>1)
+static volatile uint8_t __BOOTLOADERENTRY_FROMSOFTWARE__bootup_RAMEND_doesmatch __attribute__ ((section(".noinit")));
+static volatile uint8_t __BOOTLOADERENTRY_FROMSOFTWARE__bootup_MCUCSR __attribute__ ((section(".noinit")));
+
+static inline bool bootLoaderCondition(void)
+{
+  if (__BOOTLOADERENTRY_FROMSOFTWARE__bootup_MCUCSR & (~(_BV(WDRF)))) {
+  } else {
+    if (__BOOTLOADERENTRY_FROMSOFTWARE__bootup_RAMEND_doesmatch == (__BOOTLOADERENTRY_FROMSOFTWARE__EXPECTEDADDRESS & 0xff)) {
+      // anything else: match - the firmware is calling the bootloader
+      return true;
+    }
+  }
+  return bootLoaderConditionSimple();
+}
+#else
+#define bootLoaderCondition            bootLoaderConditionSimple
+#endif

 
 #endif /* __ASSEMBLER__ */
 
 
 #endif /* __ASSEMBLER__ */