diff options
Diffstat (limited to 'lib/ccdbg-command.c')
| -rw-r--r-- | lib/ccdbg-command.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/lib/ccdbg-command.c b/lib/ccdbg-command.c new file mode 100644 index 00000000..38c006cb --- /dev/null +++ b/lib/ccdbg-command.c @@ -0,0 +1,182 @@ +/* + * 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); +} + +uint16_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; +} + +static uint8_t jump_mem[] = { + 3, LJMP, 0xf0, 0x00, +#define PC_HIGH 2 +#define PC_LOW 3 + 0 +}; + +uint8_t +ccdbg_set_pc(struct ccdbg *dbg, uint16_t pc) +{ + jump_mem[PC_HIGH] = pc >> 8; + jump_mem[PC_LOW] = pc & 0xff; + return ccdbg_execute(dbg, jump_mem); +} + +uint8_t +ccdbg_execute_hex_image(struct ccdbg *dbg, struct hex_image *image) +{ + uint16_t pc; + uint8_t status; + + if (image->address < 0xf000) { + fprintf(stderr, "Cannot execute program starting at 0x%04x\n", image->address); + return -1; + } + ccdbg_write_hex_image(dbg, image, 0); + ccdbg_set_pc(dbg, image->address); + pc = ccdbg_get_pc(dbg); + printf ("pc starts at 0x%04x\n", pc); + status = ccdbg_resume(dbg); + printf ("resume status: 0x%02x\n", status); + return 0; +} + |