* avr910.c: Refactor to allow probing for auto addr increment. If auto
incr supported by programmer hw, don't send addr for every byte. git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@304 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
Theodore A. Roth
parent
0992123e64
commit
abc3e76bf8
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@ -1,3 +1,8 @@
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2003-04-05 Theodore A. Roth <troth@openavr.org>
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* avr910.c: Refactor to allow probing for auto addr increment. If auto
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incr supported by programmer hw, don't send addr for every byte.
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2003-04-03 Eric B. Weddington <eric@umginc.net>
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* confwin.c: Fix bug that allows garbage for non-existent user
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config filename on Windows.
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191
avr910.c
191
avr910.c
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@ -39,6 +39,8 @@
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extern char * progname;
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extern int do_cycles;
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static char has_auto_incr_addr;
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/* These two defines are only for debugging. Will remove them once it starts
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working. */
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@ -227,8 +229,15 @@ static int avr910_initialize(PROGRAMMER * pgm, AVRPART * p)
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avr910_recv(pgm, &type, 1);
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fprintf(stderr, "Found programmer: Id = \"%s\"; type = %c\n", id, type);
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fprintf(stderr, " Software Version = %c.%c; "
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"Hardware Version = %c.%c\n", sw[0], sw[1], hw[0], hw[1]);
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fprintf(stderr, " Software Version = %c.%c; ", sw[0], sw[1]);
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fprintf(stderr, "Hardware Version = %c.%c\n", hw[0], hw[1]);
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/* See if programmer supports autoincrement of address. */
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avr910_send(pgm, "a", 1);
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avr910_recv(pgm, &has_auto_incr_addr, 1);
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if (has_auto_incr_addr == 'Y')
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fprintf(stderr, "Programmer supports auto addr increment.\n");
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/* Get list of devices that the programmer supports. */
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@ -372,116 +381,119 @@ static void avr910_set_addr(PROGRAMMER * pgm, unsigned long addr)
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}
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/*
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* For some reason, if we don't do this when writing to flash, the first byte
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* of flash is not programmed. I susect that the board got out of sync after
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* the erase and sending another command gets us back in sync. -TRoth
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*/
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static void avr910_write_setup(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m)
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static int avr910_paged_write_flash(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
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int page_size, int n_bytes)
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{
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if (strcmp(m->desc, "flash") == 0) {
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avr910_send(pgm, "y", 1);
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avr910_vfy_cmd_sent(pgm, "clear LED");
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unsigned char cmd[] = {'c', 'C'};
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unsigned char buf[2];
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unsigned int addr = 0;
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unsigned int max_addr = n_bytes;
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/*
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* For some reason, if we don't do this when writing to flash, the first
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* byte of flash is not programmed. I susect that the board got out of sync
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* after the erase and sending another command gets us back in sync. -TRoth
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*/
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avr910_send(pgm, "y", 1);
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avr910_vfy_cmd_sent(pgm, "clear LED");
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avr910_set_addr(pgm, addr>>1);
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while (addr < max_addr) {
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buf[0] = cmd[addr & 0x01];
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buf[1] = m->buf[addr];
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avr910_send(pgm, buf, sizeof(buf));
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avr910_vfy_cmd_sent(pgm, "write byte");
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addr++;
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if ((has_auto_incr_addr != 'Y') && ((addr & 0x01) == 0)) {
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avr910_set_addr(pgm, addr>>1);
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}
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}
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return addr;
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}
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static int avr910_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
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unsigned long addr, unsigned char value)
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static int avr910_paged_write_eeprom(PROGRAMMER * pgm, AVRPART * p,
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AVRMEM * m, int page_size, int n_bytes)
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{
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unsigned char cmd[2];
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unsigned int addr = 0;
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unsigned int max_addr = n_bytes;
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no_show_func_info();
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avr910_set_addr(pgm, addr);
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cmd[0] = 'D';
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while (addr < max_addr) {
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cmd[1] = m->buf[addr];
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avr910_send(pgm, cmd, sizeof(cmd));
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avr910_vfy_cmd_sent(pgm, "write byte");
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addr++;
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if (has_auto_incr_addr != 'Y') {
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avr910_set_addr(pgm, addr);
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}
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}
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return addr;
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}
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static int avr910_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
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int page_size, int n_bytes)
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{
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if (strcmp(m->desc, "flash") == 0) {
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if (addr & 0x01) {
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cmd[0] = 'C'; /* Write Program Mem high byte */
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}
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else {
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cmd[0] = 'c';
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}
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addr >>= 1;
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return avr910_paged_write_flash(pgm, p, m, page_size, n_bytes);
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}
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else if (strcmp(m->desc, "eeprom") == 0) {
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cmd[0] = 'D';
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return avr910_paged_write_eeprom(pgm, p, m, page_size, n_bytes);
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}
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else {
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return -1;
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return -2;
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}
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cmd[1] = value;
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avr910_set_addr(pgm, addr);
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avr910_send(pgm, cmd, sizeof(cmd));
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avr910_vfy_cmd_sent(pgm, "write byte");
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return 0;
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}
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static int avr910_read_byte_flash(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
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unsigned long addr, unsigned char * value)
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static int avr910_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
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int page_size, int n_bytes)
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{
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static int cached = 0;
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static unsigned char cvalue;
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static unsigned long caddr;
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if (cached && ((caddr + 1) == addr)) {
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*value = cvalue;
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cached = 0;
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}
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else {
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unsigned char buf[2];
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avr910_set_addr(pgm, addr >> 1);
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avr910_send(pgm, "R", 1);
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/* Read back the program mem word (MSB first) */
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avr910_recv(pgm, buf, sizeof(buf));
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if ((addr & 0x01) == 0) {
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*value = buf[1];
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cached = 1;
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cvalue = buf[0];
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caddr = addr;
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}
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else {
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*value = buf[0];
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}
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}
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return 0;
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}
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static int avr910_read_byte_eeprom(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
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unsigned long addr, unsigned char * value)
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{
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avr910_set_addr(pgm, addr);
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avr910_send(pgm, "d", 1);
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avr910_recv(pgm, value, 1);
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return 0;
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}
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static int avr910_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
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unsigned long addr, unsigned char * value)
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{
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no_show_func_info();
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unsigned char cmd;
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int rd_size;
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unsigned int addr = 0;
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unsigned int max_addr;
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if (strcmp(m->desc, "flash") == 0) {
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return avr910_read_byte_flash(pgm, p, m, addr, value);
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cmd = 'R';
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rd_size = 2; /* read two bytes per addr */
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}
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else if (strcmp(m->desc, "eeprom") == 0) {
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cmd = 'd';
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rd_size = 1;
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}
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else {
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return -2;
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}
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if (strcmp(m->desc, "eeprom") == 0) {
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return avr910_read_byte_eeprom(pgm, p, m, addr, value);
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max_addr = n_bytes/rd_size;
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avr910_set_addr(pgm, addr);
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while (addr < max_addr) {
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avr910_send(pgm, &cmd, 1);
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avr910_recv(pgm, &m->buf[addr], rd_size);
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addr++;
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if (has_auto_incr_addr != 'Y') {
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avr910_set_addr(pgm, addr);
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}
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}
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return -1;
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return addr * rd_size;
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}
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/* Signature byte reads are always 3 bytes. */
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@ -533,8 +545,7 @@ void avr910_initpgm(PROGRAMMER * pgm)
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* optional functions
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*/
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pgm->write_setup = avr910_write_setup;
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pgm->write_byte = avr910_write_byte;
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pgm->read_byte = avr910_read_byte;
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pgm->paged_write = avr910_paged_write;
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pgm->paged_load = avr910_paged_load;
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pgm->read_sig_bytes = avr910_read_sig_bytes;
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}
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