X-Git-Url: http://git.linex4red.de/pub/USBaspLoader.git/blobdiff_plain/fa0b51823454caae26a476ec1e156a73377b4546..5b0272d9af73a164da192d796fc33ec736b93f0a:/updater/updater.c

diff --git a/updater/updater.c b/updater/updater.c
new file mode 100644
index 0000000..6b9cde3
--- /dev/null
+++ b/updater/updater.c
@@ -0,0 +1,317 @@
+#ifndef F_CPU
+  #define F_CPU 1000000UL /* 1 Mhz-Takt; hier richtigen Wert eintragen */
+#endif
+
+// 1) Test the "changed"     - feature by debugging a LED-PIN to high (PB0?)
+// 2) Test the "needs_erase" - feature by debugging a LED-PIN to high (PB1?)
+// #define mypgmdebug 1
+
+#include "../firmware/spminterface.h"
+#include "firmware.h"
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <avr/wdt.h>
+
+#include <avr/pgmspace.h>
+
+#include <stdint.h>
+
+#include <util/delay.h>
+#include <string.h>
+
+
+
+// helpful definitions and makros ////
+
+#ifndef NEW_BOOTLOADER_ADDRESS
+  #error "where should the new bootloader be positioned?"
+#endif
+
+
+
+#if (NEW_BOOTLOADER_ADDRESS != (funcaddr___bootloader__do_spm-(funcaddr___bootloader__do_spm % SPM_PAGESIZE)))
+  #warning the new bootloader seems to be located elsewhere, than the current one!
+#endif
+
+#ifndef NEW_SPM_ADDRESS
+  #warning I do not know where new "bootloader__do_spm" is located - assuming "NEW_BOOTLOADER_ADDRESS+(funcaddr___bootloader__do_spm % SPM_PAGESIZE)"
+  #define NEW_SPM_ADDRESS (NEW_BOOTLOADER_ADDRESS+(funcaddr___bootloader__do_spm % SPM_PAGESIZE))
+#endif
+
+// TEMP_SPM supports up to 4 pages for "bootloader__do_spm"...
+#define TEMP_SPM_NUMPAGE 4
+#define TEMP_SPM_BLKSIZE (TEMP_SPM_NUMPAGE*SPM_PAGESIZE)
+#ifndef TEMP_SPM_PAGEADR
+  #warning "TEMP_SPM_PAGEADR" is not defined explicitly - will choose END OF FLASH !
+  #define TEMP_SPM_PAGEADR ((FLASHEND+1) - TEMP_SPM_BLKSIZE)
+#endif
+#define TEMP_SPM_ADDRESS ((TEMP_SPM_PAGEADR) + (funcaddr___bootloader__do_spm % SPM_PAGESIZE))
+
+
+#if (NEW_SPM_ADDRESS == funcaddr___bootloader__do_spm)
+  #define new_do_spm	do_spm
+#else
+void new_do_spm(const uint32_t flash_byteaddress, const uint8_t spmcrval, const uint16_t dataword) {
+    __do_spm_Ex(flash_byteaddress, spmcrval, dataword, NEW_SPM_ADDRESS >> 1);
+}
+#endif
+
+void temp_do_spm(const uint32_t flash_byteaddress, const uint8_t spmcrval, const uint16_t dataword) {
+    __do_spm_Ex(flash_byteaddress, spmcrval, dataword, TEMP_SPM_ADDRESS >> 1);
+}
+
+
+
+// some important consistency checks ////
+
+//check if "NEW_BOOTLOADER_ADDRESS" is page-aligned
+#if (NEW_BOOTLOADER_ADDRESS % SPM_PAGESIZE != 0) 
+  #error "NEW_BOOTLOADER_ADDRESS" is not aligned to pages!
+#endif
+
+//check, if NEW_SPM_ADDRESS is an even address
+#if ((NEW_SPM_ADDRESS % 2) != 0)
+  #error NEW_SPM_ADDRESS must be an even address, since it contains executable code!
+#endif
+
+
+
+//check, if TEMP_SPM somehow overlaps with old SPM
+#if (((TEMP_SPM_ADDRESS + TEMP_SPM_BLKSIZE + SPM_PAGESIZE) >= funcaddr___bootloader__do_spm) && (TEMP_SPM_ADDRESS <= (funcaddr___bootloader__do_spm + TEMP_SPM_BLKSIZE + SPM_PAGESIZE)))
+  #error TEMP_SPM_ADDRESS overlaps "funcaddr___bootloader__do_spm"!
+#endif
+
+//check, if TEMP_SPM somehow overlaps with new SPM
+#if (((TEMP_SPM_ADDRESS + TEMP_SPM_BLKSIZE + SPM_PAGESIZE) >= NEW_SPM_ADDRESS) && (TEMP_SPM_ADDRESS <= (NEW_SPM_ADDRESS + TEMP_SPM_BLKSIZE + SPM_PAGESIZE)))
+  #error TEMP_SPM_ADDRESS overlaps "NEW_SPM_ADDRESS"!
+#endif
+
+//check, if TEMP_SPM_ADDRESS is an even address
+#if ((TEMP_SPM_ADDRESS % 2) != 0)
+  #error TEMP_SPM_ADDRESS must be an even address, since it contains executable code!
+#endif
+
+//check, if TEMP_SPM_ADDRESS fits into flash
+#if ((TEMP_SPM_PAGEADR + TEMP_SPM_BLKSIZE) > (FLASHEND+1))
+  #error TEMP_SPM_ADDRESS exceeds flashend!
+#endif
+
+//check if size too low
+#if (SIZEOF_new_firmware <= (TEMP_SPM_BLKSIZE + (NEW_SPM_ADDRESS - NEW_BOOTLOADER_ADDRESS)))
+  #error empty firmware!
+#endif
+
+//check if size too high
+#if (SIZEOF_new_firmware > ((FLASHEND+1)-NEW_BOOTLOADER_ADDRESS))
+  #error firmware too big! firmware does not fit into flash memory!
+#endif
+
+// main code ////
+
+/*
+ * in this case a near address
+ */
+typedef uint32_t mypgm_addr_t;
+typedef void (*mypgm_spminterface)(const uint32_t flash_byteaddress, const uint8_t spmcrval, const uint16_t dataword);
+
+
+#if 0
+size_t mypgm_readpage(const mypgm_addr_t byteaddress,const void* buffer, const size_t bufferbytesize) {
+  size_t	result		= (bufferbytesize < SPM_PAGESIZE)?bufferbytesize:SPM_PAGESIZE;
+  size_t	pagesize	= result >> 1;
+  uint16_t	*pagedata	= (void*)buffer;
+  mypgm_addr_t	pageaddr	= byteaddress - (byteaddress % SPM_PAGESIZE);
+  size_t	i;
+  
+  for (i=0;i<pagesize;i+=1) {
+    pagedata[i]=pgm_read_word(pageaddr);
+    pageaddr+=2;
+  }
+  
+  return result;
+}
+#else
+// replace it somehow with "memcpy_PF" in order to save some ops...
+size_t mypgm_readpage(const mypgm_addr_t byteaddress,const void* buffer, const size_t bufferbytesize) {
+  size_t	result		= (bufferbytesize < SPM_PAGESIZE)?bufferbytesize:SPM_PAGESIZE;
+  mypgm_addr_t	pageaddr	= byteaddress - (byteaddress % SPM_PAGESIZE);
+  
+  memcpy_PF((void*)buffer, (uint_farptr_t)pageaddr, result);
+  
+  return result;
+}
+#endif
+
+size_t mypgm_WRITEpage(const mypgm_addr_t byteaddress,const void* buffer, const size_t bufferbytesize, mypgm_spminterface spmfunc) {
+  size_t	result		= (bufferbytesize < SPM_PAGESIZE)?bufferbytesize:SPM_PAGESIZE;
+  size_t	pagesize	= result >> 1;
+  uint16_t	*pagedata	= (void*)buffer;
+  mypgm_addr_t	pageaddr_bakup	= byteaddress - (byteaddress % SPM_PAGESIZE);
+  mypgm_addr_t	pageaddr	= pageaddr_bakup;
+  
+  uint8_t	changed=0, needs_erase=0;
+  uint16_t	deeword;
+  size_t	i;
+  
+  // just check, if page needs a rewrite or an erase...
+  for (i=0;i<pagesize;i+=1) {
+    deeword=pgm_read_word(pageaddr);
+
+    if (deeword != pagedata[i]) changed=1;
+
+    /*
+     *  deeword = x
+     *  buffer  = y
+     * 
+     *  1 ? 1 ==> 1
+     *  1 ? 0 ==> 1
+     *  0 ? 1 ==> 0
+     *  0 ? 0 ==> 1
+     * 
+     * ==> /(/x * y) ==> x + /y
+     */
+    deeword |= ~pagedata[i];
+    if ((~deeword) != 0) needs_erase=1;
+      
+    pageaddr+=2;
+  }
+
+  if (changed) {
+#ifdef mypgmdebug
+    DDRB  |= (1<<PB0);
+    PORTB |= (1<<PB0);
+#endif
+    
+    if (needs_erase) {
+      //do a page-erase, ATTANTION: flash only can be erased a limited number of times !
+      spmfunc(pageaddr_bakup, 0x3, 0);
+#ifndef mypgmdebug
+    }
+#else 
+    } else {
+      DDRB  |= (1<<PB1);
+      PORTB |= (1<<PB1);
+    }
+#endif
+
+    
+    // from now on, the page is assumed empty !! (hopefully our code is located somewhere else!)
+    // now, fill the tempoary buffer
+    // ATTANTION: see comment on "do_spm" !
+    pageaddr	= pageaddr_bakup;
+    for (i=0;i<pagesize;i+=1) {
+      spmfunc(pageaddr, 0x1, pagedata[i]);
+      pageaddr+=2;
+    }
+    
+    // so, now finally write the page to the FLASH
+    spmfunc(pageaddr_bakup, 0x5, 0);
+  } else {
+    // no change - no write...
+    result = 0;
+  }
+  
+  
+  return result;
+}
+
+// #pragma GCC diagnostic ignored "-Wno-pointer-to-int-cast"
+int main(void)
+{
+    size_t  i;
+    uint8_t buffer[SPM_PAGESIZE];
+    
+    wdt_disable();
+    cli();
+
+#ifdef mypgmdebug
+    DDRD  |= (1<<PD3);
+    DDRD  |= (1<<PD5);
+    PORTD |= (1<<PD3);
+    PORTD |= (1<<PD5);
+#endif
+
+
+
+    // check if firmware would change...
+    buffer[0]=0;
+    for (i=0;i<SIZEOF_new_firmware;i+=2) {
+      uint16_t a, b;
+      a=pgm_read_word((void*)&new_firmware[i]);
+      b=pgm_read_word(NEW_BOOTLOADER_ADDRESS+i);
+      if (a!=b) {
+	buffer[0]=1;
+	break;
+      }
+    }
+
+
+
+    // need to change the firmware...
+    if (buffer[0]) {
+
+
+      // A
+      // copy the current "bootloader__do_spm" to tempoary position via std. "bootloader__do_spm"
+      for (i=0;i<TEMP_SPM_BLKSIZE;i+=SPM_PAGESIZE) {
+	mypgm_WRITEpage(TEMP_SPM_PAGEADR+i, buffer, mypgm_readpage(funcaddr___bootloader__do_spm+i, buffer, sizeof(buffer)), do_spm);
+  #ifdef mypgmdebug
+	PORTD ^= (1<<PD3);
+	_delay_ms(500);
+	PORTD ^= (1<<PD3);
+	_delay_ms(500);
+  #endif
+      }
+
+      // B
+      // start updating the firmware to "NEW_BOOTLOADER_ADDRESS" until at least "TEMP_SPM_BLKSIZE"-bytes after "NEW_SPM_ADDRESS" were written
+      // therefore use the tempoary "bootloader__do_spm" (since we most probably will overwrite the default do_spm)
+      for (i=0;;i+=SPM_PAGESIZE) {
+	memset((void*)buffer, 0xff, sizeof(buffer));
+	memcpy_PF((void*)buffer, (uint_farptr_t)((void*)&new_firmware[i]), ((SIZEOF_new_firmware-i)>sizeof(buffer))?sizeof(buffer):(SIZEOF_new_firmware-i));
+	
+	mypgm_WRITEpage(NEW_BOOTLOADER_ADDRESS+i, buffer, sizeof(buffer), temp_do_spm);
+	
+  #ifdef mypgmdebug
+	PORTD ^= (1<<PD3);
+	_delay_ms(500);
+	PORTD ^= (1<<PD3);
+	_delay_ms(500);
+  #endif
+
+	if ((NEW_BOOTLOADER_ADDRESS+i) > (NEW_SPM_ADDRESS+TEMP_SPM_BLKSIZE)) break;
+      }
+
+      // C
+      // continue writeing the new_firmware after "NEW_SPM_ADDRESS+TEMP_SPM_BLKSIZE" this time use the "new_do_spm"
+      for (;i<SIZEOF_new_firmware;i+=SPM_PAGESIZE) {
+	memset((void*)buffer, 0xff, sizeof(buffer));
+	memcpy_PF((void*)buffer, (uint_farptr_t)((void*)&new_firmware[i]), ((SIZEOF_new_firmware-i)>sizeof(buffer))?sizeof(buffer):(SIZEOF_new_firmware-i));
+
+	mypgm_WRITEpage(NEW_BOOTLOADER_ADDRESS+i, buffer, sizeof(buffer), new_do_spm);
+	
+  #ifdef mypgmdebug
+	PORTD ^= (1<<PD3);
+	_delay_ms(500);
+	PORTD ^= (1<<PD3);
+	_delay_ms(500);
+  #endif
+      }
+
+
+
+    }
+
+#ifdef mypgmdebug
+    PORTD |= (1<<PD3);
+#endif
+    while(1)
+    {
+#ifdef mypgmdebug
+      PORTD ^= (1<<PD5);
+      _delay_ms(100);
+#endif
+    }
+
+}