+++ /dev/null
-/*
- * Copyright © 2009 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; version 2 of the License.
- *
- * 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 "ao.h"
-
-#define DBG_CLOCK (1 << 3)
-#define DBG_DATA (1 << 4)
-#define DBG_RESET_N (1 << 5)
-
-#define DBG_CLOCK_PIN (P0_3)
-#define DBG_DATA_PIN (P0_4)
-#define DBG_RESET_N_PIN (P0_5)
-
-static void
-ao_dbg_send_bits(uint8_t msk, uint8_t val)
-{
- P0 = (P0 & ~msk) | (val & msk);
- _asm
- nop
- nop
- _endasm;
-}
-
-void
-ao_dbg_send_byte(uint8_t byte)
-{
- __xdata uint8_t b, d;
-
- P0 |= DBG_DATA;
- P0DIR |= DBG_DATA;
- for (b = 0; b < 8; b++) {
- d = 0;
- if (byte & 0x80)
- d = DBG_DATA;
- byte <<= 1;
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA, DBG_CLOCK|d);
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA, 0 |d);
- }
- P0DIR &= ~DBG_DATA;
-}
-
-uint8_t
-ao_dbg_recv_byte(void)
-{
- __xdata uint8_t byte, b;
-
- byte = 0;
- for (b = 0; b < 8; b++) {
- byte = byte << 1;
- ao_dbg_send_bits(DBG_CLOCK, DBG_CLOCK);
- if (DBG_DATA_PIN)
- byte |= 1;
- ao_dbg_send_bits(DBG_CLOCK, 0);
- }
- return byte;
-}
-
-/* 8051 instructions
- */
-#define NOP 0x00
-#define MOV_direct_data 0x75
-#define LJMP 0x02
-#define MOV_Rn_data(n) (0x78 | (n))
-#define DJNZ_Rn_rel(n) (0xd8 | (n))
-#define MOV_A_direct 0xe5
-#define MOV_direct1_direct2 0x85
-#define MOV_direct_A 0xf5
-#define MOV_DPTR_data16 0x90
-#define MOV_A_data 0x74
-#define MOVX_atDPTR_A 0xf0
-#define MOVX_A_atDPTR 0xe0
-#define INC_DPTR 0xa3
-#define TRAP 0xa5
-#define SJMP 0x80
-#define JB 0x20
-
-#define DEBUG_INSTR(l) (0x54 | (l))
-
-#define SFR_PSW 0xD0
-#define SFR_DPL0 0x82
-#define SFR_DPH0 0x83
-#define SFR_DPL1 0x84
-#define SFR_DPH1 0x85
-
-__xdata uint8_t save_acc;
-__xdata uint8_t save_psw;
-__xdata uint8_t save_dpl0;
-__xdata uint8_t save_dph0;
-__xdata uint8_t save_dpl1;
-__xdata uint8_t save_dph1;
-
-static uint8_t
-ao_dbg_inst1(uint8_t a) __reentrant
-{
- ao_dbg_send_byte(DEBUG_INSTR(1));
- ao_dbg_send_byte(a);
- return ao_dbg_recv_byte();
-}
-
-static uint8_t
-ao_dbg_inst2(uint8_t a, uint8_t b) __reentrant
-{
- ao_dbg_send_byte(DEBUG_INSTR(2));
- ao_dbg_send_byte(a);
- ao_dbg_send_byte(b);
- return ao_dbg_recv_byte();
-}
-
-static uint8_t
-ao_dbg_inst3(uint8_t a, uint8_t b, uint8_t c) __reentrant
-{
- ao_dbg_send_byte(DEBUG_INSTR(3));
- ao_dbg_send_byte(a);
- ao_dbg_send_byte(b);
- ao_dbg_send_byte(c);
- return ao_dbg_recv_byte();
-}
-
-void
-ao_dbg_start_transfer(uint16_t addr)
-{
- save_acc = ao_dbg_inst1(NOP);
- save_psw = ao_dbg_inst2(MOV_A_direct, SFR_PSW);
- save_dpl0 = ao_dbg_inst2(MOV_A_direct, SFR_DPL0);
- save_dph0 = ao_dbg_inst2(MOV_A_direct, SFR_DPH0);
- save_dpl1 = ao_dbg_inst2(MOV_A_direct, SFR_DPL1);
- save_dph1 = ao_dbg_inst2(MOV_A_direct, SFR_DPH1);
- ao_dbg_inst3(MOV_DPTR_data16, addr >> 8, addr);
-}
-
-void
-ao_dbg_end_transfer(void)
-{
- ao_dbg_inst3(MOV_direct_data, SFR_DPL0, save_dpl0);
- ao_dbg_inst3(MOV_direct_data, SFR_DPH0, save_dph0);
- ao_dbg_inst3(MOV_direct_data, SFR_DPL1, save_dpl1);
- ao_dbg_inst3(MOV_direct_data, SFR_DPH1, save_dph1);
- ao_dbg_inst3(MOV_direct_data, SFR_PSW, save_psw);
- ao_dbg_inst2(MOV_A_data, save_acc);
-}
-
-void
-ao_dbg_write_byte(uint8_t byte)
-{
- ao_dbg_inst2(MOV_A_data, byte);
- ao_dbg_inst1(MOVX_atDPTR_A);
- ao_dbg_inst1(INC_DPTR);
-}
-
-uint8_t
-ao_dbg_read_byte(void)
-{
- ao_dbg_inst1(MOVX_A_atDPTR);
- return ao_dbg_inst1(INC_DPTR);
-}
-
-static void
-ao_dbg_set_pins(void)
-{
- /* Disable peripheral use of P0 */
- ADCCFG = 0;
- P0SEL = 0;
-
-
- /* make P0_4 tri-state */
- P0INP = DBG_DATA;
- P2INP &= ~(P2INP_PDUP0_PULL_DOWN);
-
- /* Raise RESET_N and CLOCK */
- P0 = DBG_RESET_N | DBG_CLOCK;
-
- /* RESET_N and CLOCK are outputs now */
- P0DIR = DBG_RESET_N | DBG_CLOCK;
-}
-
-static void
-ao_dbg_long_delay(void)
-{
- uint8_t n;
-
- for (n = 0; n < 20; n++)
- _asm nop _endasm;
-}
-
-void
-ao_dbg_debug_mode(void)
-{
- ao_dbg_set_pins();
- ao_dbg_long_delay();
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA|DBG_RESET_N, DBG_CLOCK|DBG_DATA|DBG_RESET_N);
- ao_dbg_long_delay();
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA|DBG_RESET_N, 0 |DBG_DATA| 0 );
- ao_dbg_long_delay();
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA|DBG_RESET_N, DBG_CLOCK|DBG_DATA| 0 );
- ao_dbg_long_delay();
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA|DBG_RESET_N, 0 |DBG_DATA| 0 );
- ao_dbg_long_delay();
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA|DBG_RESET_N, DBG_CLOCK|DBG_DATA| 0 );
- ao_dbg_long_delay();
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA|DBG_RESET_N, 0 |DBG_DATA|DBG_RESET_N);
- ao_dbg_long_delay();
-}
-
-void
-ao_dbg_reset(void)
-{
- ao_dbg_set_pins();
- ao_dbg_long_delay();
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA|DBG_RESET_N, DBG_CLOCK|DBG_DATA|DBG_RESET_N);
- ao_dbg_long_delay();
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA|DBG_RESET_N, DBG_CLOCK|DBG_DATA| 0 );
- ao_dbg_long_delay();
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA|DBG_RESET_N, DBG_CLOCK|DBG_DATA| 0 );
- ao_dbg_long_delay();
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA|DBG_RESET_N, DBG_CLOCK|DBG_DATA| 0 );
- ao_dbg_long_delay();
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA|DBG_RESET_N, DBG_CLOCK|DBG_DATA| 0 );
- ao_dbg_long_delay();
- ao_dbg_send_bits(DBG_CLOCK|DBG_DATA|DBG_RESET_N, DBG_CLOCK|DBG_DATA|DBG_RESET_N);
- ao_dbg_long_delay();
-}
-
-static void
-debug_enable(void)
-{
- ao_dbg_debug_mode();
-}
-
-static void
-debug_reset(void)
-{
- ao_dbg_reset();
-}
-
-static void
-debug_put(void)
-{
- for (;;) {
- ao_cmd_white ();
- if (ao_cmd_lex_c == '\n')
- break;
- ao_cmd_hex();
- if (ao_cmd_status != ao_cmd_success)
- break;
- ao_dbg_send_byte(ao_cmd_lex_i);
- }
-}
-
-static void
-debug_get(void)
-{
- __xdata uint16_t count;
- __xdata uint16_t i;
- __xdata uint8_t byte;
- ao_cmd_hex();
- if (ao_cmd_status != ao_cmd_success)
- return;
- count = ao_cmd_lex_i;
- if (count > 256) {
- ao_cmd_status = ao_cmd_syntax_error;
- return;
- }
- for (i = 0; i < count; i++) {
- if (i && (i & 7) == 0)
- putchar('\n');
- byte = ao_dbg_recv_byte();
- ao_cmd_put8(byte);
- putchar(' ');
- }
- putchar('\n');
-}
-
-static uint8_t
-getnibble(void)
-{
- __xdata char c;
-
- c = getchar();
- if ('0' <= c && c <= '9')
- return c - '0';
- if ('a' <= c && c <= 'f')
- return c - ('a' - 10);
- if ('A' <= c && c <= 'F')
- return c - ('A' - 10);
- ao_cmd_status = ao_cmd_lex_error;
- return 0;
-}
-
-static void
-debug_input(void)
-{
- __xdata uint16_t count;
- __xdata uint16_t addr;
- __xdata uint8_t b;
- __xdata uint8_t i;
-
- ao_cmd_hex();
- count = ao_cmd_lex_i;
- ao_cmd_hex();
- addr = ao_cmd_lex_i;
- if (ao_cmd_status != ao_cmd_success)
- return;
- ao_dbg_start_transfer(addr);
- i = 0;
- while (count--) {
- if (!(i++ & 7))
- putchar('\n');
- b = ao_dbg_read_byte();
- ao_cmd_put8(b);
- }
- ao_dbg_end_transfer();
- putchar('\n');
-}
-
-static void
-debug_output(void)
-{
- __xdata uint16_t count;
- __xdata uint16_t addr;
- __xdata uint8_t b;
-
- ao_cmd_hex();
- count = ao_cmd_lex_i;
- ao_cmd_hex();
- addr = ao_cmd_lex_i;
- if (ao_cmd_status != ao_cmd_success)
- return;
- ao_dbg_start_transfer(addr);
- while (count--) {
- b = getnibble() << 4;
- b |= getnibble();
- if (ao_cmd_status != ao_cmd_success)
- return;
- ao_dbg_write_byte(b);
- }
- ao_dbg_end_transfer();
-}
-
-__code struct ao_cmds ao_dbg_cmds[7] = {
- { 'D', debug_enable, "D Enable debug mode" },
- { 'G', debug_get, "G <count> Get data from debug port" },
- { 'I', debug_input, "I <count> <addr> Input <count> bytes to target at <addr>" },
- { 'O', debug_output, "O <count> <addr> Output <count> bytes to target at <addr>" },
- { 'P', debug_put, "P <byte> ... Put data to debug port" },
- { 'R', debug_reset, "R Reset target" },
- { 0, debug_reset, 0 },
-};
-
-void
-ao_dbg_init(void)
-{
- ao_cmd_register(&ao_dbg_cmds[0]);
-}
projects / fw / altos / blobdiff