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/*
* Copyright © 2008 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "ccdbg.h"
/*
* Read and write arbitrary memory through the debug port
*/
#define MOV_dptr_data16 0x90
static uint8_t memory_init[] = {
3, MOV_dptr_data16, 0, 0,
#define HIGH_START 2
#define LOW_START 3
0,
};
#define MOV_a_data 0x74
#define MOVX_atdptr_a 0xf0
#define MOVX_a_atdptr 0xe0
#define INC_dptr 0xa3
static uint8_t write8[] = {
2, MOV_a_data, 0,
#define DATA_BYTE 2
1, MOVX_atdptr_a,
1, INC_dptr,
0
};
static uint8_t read8[] = {
1, MOVX_a_atdptr,
1, INC_dptr,
0,
};
uint8_t
ccdbg_write_memory(struct ccdbg *dbg, uint16_t addr, uint8_t *bytes, int nbytes)
{
memory_init[HIGH_START] = addr >> 8;
memory_init[LOW_START] = addr;
(void) ccdbg_execute(dbg, memory_init);
while (nbytes-- > 0) {
write8[DATA_BYTE] = *bytes++;
ccdbg_execute(dbg, write8);
}
return 0;
}
uint8_t
ccdbg_read_memory(struct ccdbg *dbg, uint16_t addr, uint8_t *bytes, int nbytes)
{
memory_init[HIGH_START] = addr >> 8;
memory_init[LOW_START] = addr;
(void) ccdbg_execute(dbg, memory_init);
while (nbytes-- > 0)
*bytes++ = ccdbg_execute(dbg, read8);
return 0;
}
uint8_t
ccdbg_write_hex(struct ccdbg *dbg, struct hex_file *hex)
{
int i;
struct hex_record *record;
for (i = 0; i < hex->nrecord; i++) {
record = hex->records[i];
if (record->type == HEX_RECORD_EOF)
break;
printf("Write %d bytes at 0x%04x\n",
record->length, record->address);
ccdbg_write_memory(dbg, record->address,
record->data, record->length);
}
return 0;
}
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