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Various fixes for Xmega devices. 

* avrdude.conf.in: Correctly declare EEPROM page sizes for
all Xmega devices (0x20 instead of 0x100).
* avr.c: If a memory region has a page size declared, try
using the paged IO routines regardless of the target memory
name.  Xmega EEPROM requires to be written in paged mode.
Correctly use a long (rather than unsigned long) variable to
evaluate the success status of the paged mode write attempt.
* stk500v2.c: Don't apply TIF space offsets twice (bug #27995:
AVRDUDE 5.8svn fails to program and read XMEGA); use
stk500v2_loadaddr() prior to paged mode (EEPROM and flash) writes,
otherwise programming of flash areas will fail; while being there,
check the return value of stk500v2_loadaddr() everywhere; use the
correct write/erase mode bits (same as AVR Studio does).



git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@907 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
joerg_wunsch 2010-01-12 15:42:40 +00:00
parent d5023fbd6d
commit 814ff25d79
4 changed files with 92 additions and 88 deletions
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17
ChangeLog
View File

@ -1,3 +1,20 @@
2010-01-12 Joerg Wunsch <j.gnu@uriah.heep.sax.de>
Various fixes for Xmega devices.
* avrdude.conf.in: Correctly declare EEPROM page sizes for
all Xmega devices (0x20 instead of 0x100).
* avr.c: If a memory region has a page size declared, try
using the paged IO routines regardless of the target memory
name. Xmega EEPROM requires to be written in paged mode.
Correctly use a long (rather than unsigned long) variable to
evaluate the success status of the paged mode write attempt.
* stk500v2.c: Don't apply TIF space offsets twice (bug #27995:
AVRDUDE 5.8svn fails to program and read XMEGA); use
stk500v2_loadaddr() prior to paged mode (EEPROM and flash) writes,
otherwise programming of flash areas will fail; while being there,
check the return value of stk500v2_loadaddr() everywhere; use the
correct write/erase mode bits (same as AVR Studio does).
2010-01-12 Michal Ludvig <mludvig@logix.net.nz> 2010-01-12 Michal Ludvig <mludvig@logix.net.nz>
* buspirate.c: Initialise firmware version to v0.0 * buspirate.c: Initialise firmware version to v0.0

17
avr.c
View File

@ -171,13 +171,6 @@ int avr_read(PROGRAMMER * pgm, AVRPART * p, char * memtype, int size,
*/ */
memset(buf, 0xff, size); memset(buf, 0xff, size);
if ((strcmp(mem->desc, "eeprom")==0) ||
(strcmp(mem->desc, "flash")==0) ||
(strcmp(mem->desc, "application")==0) ||
(strcmp(mem->desc, "apptable")==0) ||
(strcmp(mem->desc, "boot")==0) ||
(strcmp(mem->desc, "usersig")==0) ||
(strcmp(mem->desc, "prodsig")==0)) {
if (pgm->paged_load != NULL && mem->page_size != 0) { if (pgm->paged_load != NULL && mem->page_size != 0) {
/* /*
* the programmer supports a paged mode read, perhaps more * the programmer supports a paged mode read, perhaps more
@ -192,7 +185,6 @@ int avr_read(PROGRAMMER * pgm, AVRPART * p, char * memtype, int size,
return rc; return rc;
} }
} }
}
if (strcmp(mem->desc, "signature") == 0) { if (strcmp(mem->desc, "signature") == 0) {
if (pgm->read_sig_bytes) { if (pgm->read_sig_bytes) {
@ -545,7 +537,7 @@ int avr_write(PROGRAMMER * pgm, AVRPART * p, char * memtype, int size,
{ {
int rc; int rc;
int wsize; int wsize;
unsigned long i; long i;
unsigned char data; unsigned char data;
int werror; int werror;
AVRMEM * m; AVRMEM * m;
@ -574,12 +566,6 @@ int avr_write(PROGRAMMER * pgm, AVRPART * p, char * memtype, int size,
progbuf, wsize); progbuf, wsize);
} }
if ((strcmp(m->desc, "application")==0) ||
(strcmp(m->desc, "apptable")==0) ||
(strcmp(m->desc, "boot")==0) ||
(strcmp(m->desc, "flash")==0) ||
(strcmp(m->desc, "prodsig")==0) ||
(strcmp(m->desc, "usersig")==0)) {
if (pgm->paged_write != NULL && m->page_size != 0) { if (pgm->paged_write != NULL && m->page_size != 0) {
/* /*
* the programmer supports a paged mode write, perhaps more * the programmer supports a paged mode write, perhaps more
@ -589,7 +575,6 @@ int avr_write(PROGRAMMER * pgm, AVRPART * p, char * memtype, int size,
if ((i = pgm->paged_write(pgm, p, m, m->page_size, size)) >= 0) if ((i = pgm->paged_write(pgm, p, m, m->page_size, size)) >= 0)
return i; return i;
} }
}
if (pgm->write_setup) { if (pgm->write_setup) {
pgm->write_setup(pgm, p, m); pgm->write_setup(pgm, p, m);

28
avrdude.conf.in
View File

@ -13737,7 +13737,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x0800; size = 0x0800;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;
@ -13834,7 +13834,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x0800; size = 0x0800;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;
@ -13931,7 +13931,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x0800; size = 0x0800;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;
@ -14028,7 +14028,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x0800; size = 0x0800;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;
@ -14125,7 +14125,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x1000; size = 0x1000;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;
@ -14222,7 +14222,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x0800; size = 0x0800;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;
@ -14319,7 +14319,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x0800; size = 0x0800;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;
@ -14416,7 +14416,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x0800; size = 0x0800;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;
@ -14513,7 +14513,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x1000; size = 0x1000;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;
@ -14610,7 +14610,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x1000; size = 0x1000;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;
@ -14707,7 +14707,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x0400; size = 0x0400;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;
@ -14804,7 +14804,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x0400; size = 0x0400;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;
@ -14901,7 +14901,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x0800; size = 0x0800;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;
@ -14998,7 +14998,7 @@ part
memory "eeprom" memory "eeprom"
size = 0x0800; size = 0x0800;
offset = 0x08c0000; offset = 0x08c0000;
page_size = 0x100; page_size = 0x20;
readsize = 0x100; readsize = 0x100;
; ;

78
stk500v2.c
View File

@ -1456,7 +1456,8 @@ static int stk500hv_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
buf[2] = pagesize & 0xff; buf[2] = pagesize & 0xff;
/* flash and EEPROM reads require the load address command */ /* flash and EEPROM reads require the load address command */
stk500v2_loadaddr(pgm, use_ext_addr | (paddr >> addrshift)); if (stk500v2_loadaddr(pgm, use_ext_addr | (paddr >> addrshift)) < 0)
return -1;
} else { } else {
buf[1] = addr; buf[1] = addr;
} }
@ -1612,7 +1613,8 @@ static int stk500hv_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
memcpy(buf + 5, cache_ptr, pagesize); memcpy(buf + 5, cache_ptr, pagesize);
/* flash and EEPROM reads require the load address command */ /* flash and EEPROM reads require the load address command */
stk500v2_loadaddr(pgm, use_ext_addr | (paddr >> addrshift)); if (stk500v2_loadaddr(pgm, use_ext_addr | (paddr >> addrshift)) < 0)
return -1;
} else { } else {
buf[1] = addr; buf[1] = addr;
buf[2] = data; buf[2] = data;
@ -1781,7 +1783,8 @@ static int stk500v2_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
buf[2] = block_size & 0xff; buf[2] = block_size & 0xff;
if((last_addr==UINT_MAX)||(last_addr+block_size != addr)){ if((last_addr==UINT_MAX)||(last_addr+block_size != addr)){
stk500v2_loadaddr(pgm, use_ext_addr | (addr >> addrshift)); if (stk500v2_loadaddr(pgm, use_ext_addr | (addr >> addrshift)) < 0)
return -1;
} }
last_addr=addr; last_addr=addr;
@ -1877,7 +1880,8 @@ static int stk500hv_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
buf[2] = page_size & 0xff; buf[2] = page_size & 0xff;
if ((last_addr == UINT_MAX) || (last_addr + block_size != addr)) { if ((last_addr == UINT_MAX) || (last_addr + block_size != addr)) {
stk500v2_loadaddr(pgm, use_ext_addr | (addr >> addrshift)); if (stk500v2_loadaddr(pgm, use_ext_addr | (addr >> addrshift)) < 0)
return -1;
} }
last_addr=addr; last_addr=addr;
@ -1996,7 +2000,8 @@ static int stk500v2_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
// when crossing a 64 KB boundary in flash. // when crossing a 64 KB boundary in flash.
if (hiaddr != (addr & ~0xFFFF)) { if (hiaddr != (addr & ~0xFFFF)) {
hiaddr = addr & ~0xFFFF; hiaddr = addr & ~0xFFFF;
stk500v2_loadaddr(pgm, use_ext_addr | (addr >> addrshift)); if (stk500v2_loadaddr(pgm, use_ext_addr | (addr >> addrshift)) < 0)
return -1;
} }
result = stk500v2_command(pgm,buf,4,sizeof(buf)); result = stk500v2_command(pgm,buf,4,sizeof(buf));
@ -2075,7 +2080,8 @@ static int stk500hv_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
// when crossing a 64 KB boundary in flash. // when crossing a 64 KB boundary in flash.
if (hiaddr != (addr & ~0xFFFF)) { if (hiaddr != (addr & ~0xFFFF)) {
hiaddr = addr & ~0xFFFF; hiaddr = addr & ~0xFFFF;
stk500v2_loadaddr(pgm, use_ext_addr | (addr >> addrshift)); if (stk500v2_loadaddr(pgm, use_ext_addr | (addr >> addrshift)) < 0)
return -1;
} }
result = stk500v2_command(pgm, buf, 3, sizeof(buf)); result = stk500v2_command(pgm, buf, 3, sizeof(buf));
@ -3085,29 +3091,18 @@ static int stk600_xprog_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
{ {
unsigned char b[10]; unsigned char b[10];
/*
* Fancy offsets everywhere.
* This is probably what AVR079 means when writing about the
* "TIF address space".
*/
if (strcmp(mem->desc, "flash") == 0) { if (strcmp(mem->desc, "flash") == 0) {
b[1] = XPRG_MEM_TYPE_APPL; b[1] = XPRG_MEM_TYPE_APPL;
addr += 0x00800000;
} else if (strcmp(mem->desc, "boot") == 0) { } else if (strcmp(mem->desc, "boot") == 0) {
b[1] = XPRG_MEM_TYPE_BOOT; b[1] = XPRG_MEM_TYPE_BOOT;
addr += 0x00800000;
} else if (strcmp(mem->desc, "eeprom") == 0) { } else if (strcmp(mem->desc, "eeprom") == 0) {
b[1] = XPRG_MEM_TYPE_EEPROM; b[1] = XPRG_MEM_TYPE_EEPROM;
addr += 0x008c0000;
} else if (strcmp(mem->desc, "lockbits") == 0) { } else if (strcmp(mem->desc, "lockbits") == 0) {
b[1] = XPRG_MEM_TYPE_LOCKBITS; b[1] = XPRG_MEM_TYPE_LOCKBITS;
addr += 0x008f0000;
} else if (strncmp(mem->desc, "fuse", strlen("fuse")) == 0) { } else if (strncmp(mem->desc, "fuse", strlen("fuse")) == 0) {
b[1] = XPRG_MEM_TYPE_FUSE; b[1] = XPRG_MEM_TYPE_FUSE;
addr += 0x008f0000;
} else if (strcmp(mem->desc, "usersig") == 0) { } else if (strcmp(mem->desc, "usersig") == 0) {
b[1] = XPRG_MEM_TYPE_USERSIG; b[1] = XPRG_MEM_TYPE_USERSIG;
addr += 0x008e0000;
} else { } else {
fprintf(stderr, fprintf(stderr,
"%s: stk600_xprog_write_byte(): unknown memory \"%s\"\n", "%s: stk600_xprog_write_byte(): unknown memory \"%s\"\n",
@ -3140,35 +3135,22 @@ static int stk600_xprog_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
{ {
unsigned char b[8]; unsigned char b[8];
/*
* Fancy offsets everywhere.
* This is probably what AVR079 means when writing about the
* "TIF address space".
*/
if (strcmp(mem->desc, "flash") == 0) { if (strcmp(mem->desc, "flash") == 0) {
b[1] = XPRG_MEM_TYPE_APPL; b[1] = XPRG_MEM_TYPE_APPL;
addr += 0x00800000;
} else if (strcmp(mem->desc, "boot") == 0) { } else if (strcmp(mem->desc, "boot") == 0) {
b[1] = XPRG_MEM_TYPE_BOOT; b[1] = XPRG_MEM_TYPE_BOOT;
addr += 0x00800000;
} else if (strcmp(mem->desc, "eeprom") == 0) { } else if (strcmp(mem->desc, "eeprom") == 0) {
b[1] = XPRG_MEM_TYPE_EEPROM; b[1] = XPRG_MEM_TYPE_EEPROM;
addr += 0x008c0000;
} else if (strcmp(mem->desc, "signature") == 0) { } else if (strcmp(mem->desc, "signature") == 0) {
b[1] = XPRG_MEM_TYPE_APPL; b[1] = XPRG_MEM_TYPE_APPL;
addr += 0x01000000;
} else if (strncmp(mem->desc, "fuse", strlen("fuse")) == 0) { } else if (strncmp(mem->desc, "fuse", strlen("fuse")) == 0) {
b[1] = XPRG_MEM_TYPE_FUSE; b[1] = XPRG_MEM_TYPE_FUSE;
addr += 0x008f0000;
} else if (strcmp(mem->desc, "lockbits") == 0) { } else if (strcmp(mem->desc, "lockbits") == 0) {
b[1] = XPRG_MEM_TYPE_LOCKBITS; b[1] = XPRG_MEM_TYPE_LOCKBITS;
addr += 0x008f0000;
} else if (strcmp(mem->desc, "calibration") == 0) { } else if (strcmp(mem->desc, "calibration") == 0) {
b[1] = XPRG_MEM_TYPE_FACTORY_CALIBRATION; b[1] = XPRG_MEM_TYPE_FACTORY_CALIBRATION;
addr += 0x008e0000;
} else if (strcmp(mem->desc, "usersig") == 0) { } else if (strcmp(mem->desc, "usersig") == 0) {
b[1] = XPRG_MEM_TYPE_USERSIG; b[1] = XPRG_MEM_TYPE_USERSIG;
addr += 0x008e0000;
} else { } else {
fprintf(stderr, fprintf(stderr,
"%s: stk600_xprog_read_byte(): unknown memory \"%s\"\n", "%s: stk600_xprog_read_byte(): unknown memory \"%s\"\n",
@ -3203,6 +3185,7 @@ static int stk600_xprog_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
unsigned int offset; unsigned int offset;
unsigned char memtype; unsigned char memtype;
int n_bytes_orig = n_bytes; int n_bytes_orig = n_bytes;
unsigned long use_ext_addr = 0;
/* /*
* The XPROG read command supports at most 256 bytes in one * The XPROG read command supports at most 256 bytes in one
@ -3218,19 +3201,23 @@ static int stk600_xprog_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
*/ */
if (strcmp(mem->desc, "flash") == 0) { if (strcmp(mem->desc, "flash") == 0) {
memtype = XPRG_MEM_TYPE_APPL; memtype = XPRG_MEM_TYPE_APPL;
addr = 0x00800000; if (mem->size > 64 * 1024)
use_ext_addr = (1UL << 31);
} else if (strcmp(mem->desc, "boot") == 0) { } else if (strcmp(mem->desc, "boot") == 0) {
memtype = XPRG_MEM_TYPE_BOOT; memtype = XPRG_MEM_TYPE_BOOT;
addr = 0x00800000; // Do we have to consider the total amount of flash
// instead to decide whether to use extended addressing?
if (mem->size > 64 * 1024)
use_ext_addr = (1UL << 31);
} else if (strcmp(mem->desc, "eeprom") == 0) { } else if (strcmp(mem->desc, "eeprom") == 0) {
memtype = XPRG_MEM_TYPE_EEPROM; memtype = XPRG_MEM_TYPE_EEPROM;
addr = 0x008c0000;
} else { } else {
fprintf(stderr, fprintf(stderr,
"%s: stk600_xprog_paged_load(): unknown paged memory \"%s\"\n", "%s: stk600_xprog_paged_load(): unknown paged memory \"%s\"\n",
progname, mem->desc); progname, mem->desc);
return -1; return -1;
} }
addr = mem->offset;
if ((b = malloc(page_size + 2)) == NULL) { if ((b = malloc(page_size + 2)) == NULL) {
fprintf(stderr, fprintf(stderr,
@ -3239,6 +3226,9 @@ static int stk600_xprog_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
return -1; return -1;
} }
if (stk500v2_loadaddr(pgm, use_ext_addr) < 0)
return -1;
offset = 0; offset = 0;
while (n_bytes != 0) { while (n_bytes != 0) {
report_progress(offset, n_bytes_orig, NULL); report_progress(offset, n_bytes_orig, NULL);
@ -3278,6 +3268,8 @@ static int stk600_xprog_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
unsigned char memtype; unsigned char memtype;
int n_bytes_orig = n_bytes; int n_bytes_orig = n_bytes;
size_t writesize; size_t writesize;
unsigned long use_ext_addr = 0;
unsigned char writemode;
/* /*
* The XPROG read command supports at most 256 bytes in one * The XPROG read command supports at most 256 bytes in one
@ -3297,19 +3289,26 @@ static int stk600_xprog_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
*/ */
if (strcmp(mem->desc, "flash") == 0) { if (strcmp(mem->desc, "flash") == 0) {
memtype = XPRG_MEM_TYPE_APPL; memtype = XPRG_MEM_TYPE_APPL;
addr = 0x00800000; writemode = (1 << XPRG_MEM_WRITE_WRITE);
if (mem->size > 64 * 1024)
use_ext_addr = (1UL << 31);
} else if (strcmp(mem->desc, "boot") == 0) { } else if (strcmp(mem->desc, "boot") == 0) {
memtype = XPRG_MEM_TYPE_BOOT; memtype = XPRG_MEM_TYPE_BOOT;
addr = 0x00800000; writemode = (1 << XPRG_MEM_WRITE_WRITE);
// Do we have to consider the total amount of flash
// instead to decide whether to use extended addressing?
if (mem->size > 64 * 1024)
use_ext_addr = (1UL << 31);
} else if (strcmp(mem->desc, "eeprom") == 0) { } else if (strcmp(mem->desc, "eeprom") == 0) {
memtype = XPRG_MEM_TYPE_EEPROM; memtype = XPRG_MEM_TYPE_EEPROM;
addr = 0x008c0000; writemode = (1 << XPRG_MEM_WRITE_WRITE) | (1 << XPRG_MEM_WRITE_ERASE);
} else { } else {
fprintf(stderr, fprintf(stderr,
"%s: stk600_xprog_paged_write(): unknown paged memory \"%s\"\n", "%s: stk600_xprog_paged_write(): unknown paged memory \"%s\"\n",
progname, mem->desc); progname, mem->desc);
return -1; return -1;
} }
addr = mem->offset;
if ((b = malloc(page_size + 9)) == NULL) { if ((b = malloc(page_size + 9)) == NULL) {
fprintf(stderr, fprintf(stderr,
@ -3318,6 +3317,9 @@ static int stk600_xprog_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
return -1; return -1;
} }
if (stk500v2_loadaddr(pgm, use_ext_addr) < 0)
return -1;
offset = 0; offset = 0;
while (n_bytes != 0) { while (n_bytes != 0) {
report_progress(offset, n_bytes_orig, NULL); report_progress(offset, n_bytes_orig, NULL);
@ -3349,7 +3351,7 @@ static int stk600_xprog_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
b[0] = XPRG_CMD_WRITE_MEM; b[0] = XPRG_CMD_WRITE_MEM;
b[1] = memtype; b[1] = memtype;
if (chunk + 256 == page_size) { if (chunk + 256 == page_size) {
b[2] = 3; /* last chunk: erase page | write page */ b[2] = writemode; /* last chunk */
} else { } else {
b[2] = 0; /* initial/intermediate chunk: just download */ b[2] = 0; /* initial/intermediate chunk: just download */
} }
@ -3386,7 +3388,7 @@ static int stk600_xprog_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
} }
b[0] = XPRG_CMD_WRITE_MEM; b[0] = XPRG_CMD_WRITE_MEM;
b[1] = memtype; b[1] = memtype;
b[2] = 3; /* erase page | write page */ b[2] = writemode;
b[3] = addr >> 24; b[3] = addr >> 24;
b[4] = addr >> 16; b[4] = addr >> 16;
b[5] = addr >> 8; b[5] = addr >> 8;