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Fix (again, hopefully) page addressing for the ATMega parts.

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Rename the poorly chosen name "bank" to "page" for page addressing.
Atmel calls it "page" in their documentation.


git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@91 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
Brian S. Dean
2001-10-16 23:32:30 +00:00
parent b1b4ac48d4
commit 90d4f82fc9
6 changed files with 145 additions and 131 deletions
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66
avr.c
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@@ -295,34 +295,32 @@ int avr_read(int fd, AVRPART * p, int memtype)
/*
* write a byte of data to the indicated memory region
*/
int avr_write_bank(int fd, AVRPART * p, int memtype,
unsigned short bank)
int avr_write_page(int fd, AVRPART * p, int memtype,
unsigned short page)
{
unsigned char cmd[4];
unsigned char res[4];
unsigned int shift;
LED_ON(fd, pgm->pinno[PIN_LED_PGM]);
LED_OFF(fd, pgm->pinno[PIN_LED_ERR]);
/*
* 'bank' indicates which bank is being programmed: 0 for the first
* bank_size block, 1 for the second, up to num_banks-1 for the
* 'page' indicates which page is being programmed: 0 for the first
* page_size block, 1 for the second, up to num_pages-1 for the
* last. The MCU actually wants the high-order bits of what would
* be the actual address instead, shifted left to the upper most
* bits of a 16 bit word. For a 128K flash, the actual address is a
* 17 bits. To get the right value to send to the MCU, we want to
* shift 'bank' left by 16 - the number of bits in the bank
* shift 'page' left by 16 - the number of bits in the page
* address.
*/
shift = 16 - p->mem[memtype].bankaddrbits;
bank = bank << shift;
page = page << p->mem[memtype].pageaddr_shift;
fprintf(stderr, "bank address=%u\n", bank);
fprintf(stderr, "page address=%u\n", page);
cmd[0] = 0x4c;
cmd[1] = bank >> 8; /* high order bits of address */
cmd[2] = bank & 0x0ff; /* low order bits of address */
cmd[1] = page >> 8; /* high order bits of address */
cmd[2] = page & 0x0ff; /* low order bits of address */
cmd[3] = 0; /* these bits are ignored */
avr_cmd(fd, cmd, res);
@@ -355,11 +353,11 @@ int avr_write_byte(int fd, AVRPART * p, int memtype,
/* order here is very important, AVR_M_EEPROM, AVR_M_FLASH, AVR_M_FLASH+1 */
static unsigned char cmdbyte[3] = { 0xc0, 0x40, 0x48 };
if (!p->mem[memtype].banked) {
if (!p->mem[memtype].paged) {
/*
* check to see if the write is necessary by reading the existing
* value and only write if we are changing the value; we can't
* use this optimization for banked addressing.
* use this optimization for paged addressing.
*/
b = avr_read_byte(fd, p, memtype, addr);
if (b == data) {
@@ -367,7 +365,7 @@ int avr_write_byte(int fd, AVRPART * p, int memtype,
}
}
else {
addr = addr % p->mem[memtype].bank_size;
addr = addr % p->mem[memtype].page_size;
}
LED_ON(fd, pgm->pinno[PIN_LED_PGM]);
@@ -388,11 +386,11 @@ int avr_write_byte(int fd, AVRPART * p, int memtype,
avr_cmd(fd, cmd, res);
if (p->mem[memtype].banked) {
if (p->mem[memtype].paged) {
/*
* in banked addressing, single bytes to written to the memory
* in paged addressing, single bytes to written to the memory
* page complete immediately, we only need to delay when we commit
* the whole page via the avr_write_bank() routine.
* the whole page via the avr_write_page() routine.
*/
LED_OFF(fd, pgm->pinno[PIN_LED_PGM]);
return 0;
@@ -483,15 +481,15 @@ int avr_write(int fd, AVRPART * p, int memtype, int size)
werror = 1;
}
if (p->mem[memtype].banked) {
if (((i % p->mem[memtype].bank_size) == p->mem[memtype].bank_size-1) ||
if (p->mem[memtype].paged) {
if (((i % p->mem[memtype].page_size) == p->mem[memtype].page_size-1) ||
(i == wsize-1)) {
rc = avr_write_bank(fd, p, memtype, i/p->mem[memtype].bank_size);
rc = avr_write_page(fd, p, memtype, i/p->mem[memtype].page_size);
if (rc) {
fprintf(stderr,
" *** bank %ld (addresses 0x%04lx - 0x%04lx) failed to write\n",
i % p->mem[memtype].bank_size,
i-p->mem[memtype].bank_size+1, i);
" *** page %ld (addresses 0x%04lx - 0x%04lx) failed to write\n",
i % p->mem[memtype].page_size,
i-p->mem[memtype].page_size+1, i);
fprintf(stderr, "\n");
LED_ON(fd, pgm->pinno[PIN_LED_ERR]);
werror = 1;
@@ -717,18 +715,24 @@ void avr_mem_display(char * prefix, FILE * f, AVRMEM * m, int type)
{
if (m == NULL) {
fprintf(f,
"%sMem Bank Polled\n"
"%sType Banked Size Size #Banks MinW MaxW ReadBack\n"
"%s------ ------ ------ ---- ------ ----- ----- ---------\n",
"%sMem Page Page Polled\n"
"%sType Paged Size Size Shift #Pages MinW MaxW ReadBack\n"
"%s------ ------ ------ ---- ----- ------ ----- ----- ---------\n",
prefix, prefix, prefix);
}
else {
fprintf(f,
"%s%-6s %-6s %6d %4d %6d %5d %5d 0x%02x 0x%02x\n",
prefix, avr_memtstr(type), m->banked ? "yes" : "no",
m->size, m->bank_size, m->num_banks,
m->min_write_delay, m->max_write_delay,
m->readback[0], m->readback[1]);
"%s%-6s %-6s %6d %4d %5d %6d %5d %5d 0x%02x 0x%02x\n",
prefix, avr_memtstr(type),
m->paged ? "yes" : "no",
m->size,
m->page_size,
m->pageaddr_shift,
m->num_pages,
m->min_write_delay,
m->max_write_delay,
m->readback[0],
m->readback[1]);
}
}