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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"
void
ccdbg_debug_mode(struct ccdbg *dbg)
{
/* force two rising clocks while holding RESET_N low */
ccdbg_debug(CC_DEBUG_COMMAND, "#\n");
ccdbg_debug(CC_DEBUG_COMMAND, "# Debug mode\n");
ccdbg_debug(CC_DEBUG_COMMAND, "#\n");
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_DATA );
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_DATA );
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_DATA|CC_RESET_N);
}
void
ccdbg_reset(struct ccdbg *dbg)
{
ccdbg_debug(CC_DEBUG_COMMAND, "#\n");
ccdbg_debug(CC_DEBUG_COMMAND, "# Reset\n");
ccdbg_debug(CC_DEBUG_COMMAND, "#\n");
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
}
uint8_t
ccdbg_chip_erase(struct ccdbg *dbg)
{
return ccdbg_cmd_write_read8(dbg, CC_CHIP_ERASE, NULL, 0);
}
uint8_t
ccdbg_wr_config(struct ccdbg *dbg, uint8_t config)
{
return ccdbg_cmd_write_read8(dbg, CC_WR_CONFIG, &config, 1);
}
uint8_t
ccdbg_rd_config(struct ccdbg *dbg)
{
return ccdbg_cmd_write_read8(dbg, CC_RD_CONFIG, NULL, 0);
}
uint8_t
ccdbg_get_pc(struct ccdbg *dbg)
{
return ccdbg_cmd_write_read16(dbg, CC_GET_PC, NULL, 0);
}
uint8_t
ccdbg_read_status(struct ccdbg *dbg)
{
return ccdbg_cmd_write_read8(dbg, CC_READ_STATUS, NULL, 0);
}
uint8_t
ccdbg_set_hw_brkpnt(struct ccdbg *dbg, uint8_t number, uint8_t enable, uint16_t addr)
{
uint8_t data[3];
data[0] = (number << 3) | (enable << 2);
data[1] = (addr >> 8);
data[2] = addr;
return ccdbg_cmd_write_read8(dbg, CC_SET_HW_BRKPNT, data, 3);
}
uint8_t
ccdbg_halt(struct ccdbg *dbg)
{
return ccdbg_cmd_write_read8(dbg, CC_HALT, NULL, 0);
}
uint8_t
ccdbg_resume(struct ccdbg *dbg)
{
return ccdbg_cmd_write_read8(dbg, CC_RESUME, NULL, 0);
}
uint8_t
ccdbg_debug_instr(struct ccdbg *dbg, uint8_t *instr, int nbytes)
{
return ccdbg_cmd_write_read8(dbg, CC_DEBUG_INSTR(nbytes), instr, nbytes);
}
uint8_t
ccdbg_step_instr(struct ccdbg *dbg)
{
return ccdbg_cmd_write_read8(dbg, CC_STEP_INSTR, NULL, 0);
}
uint8_t
ccdbg_step_replace(struct ccdbg *dbg, uint8_t *instr, int nbytes)
{
return ccdbg_cmd_write_read8(dbg, CC_STEP_REPLACE(nbytes), instr, nbytes);
}
uint16_t
ccdbg_get_chip_id(struct ccdbg *dbg)
{
return ccdbg_cmd_write_read16(dbg, CC_GET_CHIP_ID, NULL, 0);
}
/*
* Execute a sequence of instructions
*/
uint8_t
ccdbg_execute(struct ccdbg *dbg, uint8_t *inst)
{
uint8_t status = 0;
while(inst[0] != 0) {
uint8_t len = inst[0];
int i;
ccdbg_debug(CC_DEBUG_INSTRUCTIONS, "\t%02x", inst[1]);
for (i = 0; i < len - 1; i++)
ccdbg_debug(CC_DEBUG_INSTRUCTIONS, " %02x", inst[i+2]);
status = ccdbg_debug_instr(dbg, inst+1, len);
for (; i < 3; i++)
ccdbg_debug(CC_DEBUG_INSTRUCTIONS, " ");
ccdbg_debug(CC_DEBUG_INSTRUCTIONS, " -> %02x\n", status);
inst += len + 1;
}
return status;
}
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