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Allow to specificy if SRST is asserted and when it is released. 

E.g. for STM32L0 and F7, IDCODE register can not be read while device is
under Reset.
This commit is contained in:
Uwe Bonnes 2018-06-13 12:13:16 +02:00
parent 66e357d517
commit 44fc24e0e7
1 changed files with 29 additions and 13 deletions
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42
src/command.c
View File

@ -43,6 +43,12 @@ struct command_s {
const char *help;
};
enum assert_srst_t{
ASSERT_NEVER = 0,
ASSERT_UNTIL_SCAN,
ASSERT_UNTIL_ATTACH
};
static bool cmd_version(void);
static bool cmd_help(target *t);
@ -50,7 +56,7 @@ static bool cmd_jtag_scan(target *t, int argc, char **argv);
static bool cmd_swdp_scan(void);
static bool cmd_targets(void);
static bool cmd_morse(void);
static bool cmd_connect_srst(target *t, int argc, const char **argv);
static bool cmd_assert_srst(target *t, int argc, const char **argv);
static bool cmd_hard_srst(void);
#ifdef PLATFORM_HAS_POWER_SWITCH
static bool cmd_target_power(target *t, int argc, const char **argv);
@ -69,7 +75,7 @@ const struct command_s cmd_list[] = {
{"swdp_scan", (cmd_handler)cmd_swdp_scan, "Scan SW-DP for devices" },
{"targets", (cmd_handler)cmd_targets, "Display list of available targets" },
{"morse", (cmd_handler)cmd_morse, "Display morse error message" },
{"connect_srst", (cmd_handler)cmd_connect_srst, "Configure connect under SRST: (enable|disable)" },
{"assert_srst", (cmd_handler)cmd_assert_srst, "Assert SRST until:(never(default)| scan | attach)" },
{"hard_srst", (cmd_handler)cmd_hard_srst, "Force a pulse on the hard SRST line - disconnects target" },
#ifdef PLATFORM_HAS_POWER_SWITCH
{"tpwr", (cmd_handler)cmd_target_power, "Supplies power to the target: (enable|disable)"},
@ -83,7 +89,7 @@ const struct command_s cmd_list[] = {
{NULL, NULL, NULL}
};
static bool connect_assert_srst;
static enum assert_srst_t assert_srst;
#ifdef PLATFORM_HAS_DEBUG
bool debug_bmp;
#endif
@ -159,8 +165,10 @@ static bool cmd_jtag_scan(target *t, int argc, char **argv)
irlens[argc-1] = 0;
}
if(connect_assert_srst)
platform_srst_set_val(true); /* will be deasserted after attach */
if(assert_srst != ASSERT_NEVER)
platform_srst_set_val(true);
if(assert_srst == ASSERT_UNTIL_SCAN)
platform_srst_set_val(false);
int devs = -1;
volatile struct exception e;
@ -190,8 +198,10 @@ bool cmd_swdp_scan(void)
{
gdb_outf("Target voltage: %s\n", platform_target_voltage());
if(connect_assert_srst)
platform_srst_set_val(true); /* will be deasserted after attach */
if(assert_srst != ASSERT_NEVER)
platform_srst_set_val(true);
if(assert_srst == ASSERT_UNTIL_SCAN)
platform_srst_set_val(false);
int devs = -1;
volatile struct exception e;
@ -244,14 +254,20 @@ bool cmd_morse(void)
return true;
}
static bool cmd_connect_srst(target *t, int argc, const char **argv)
static bool cmd_assert_srst(target *t, int argc, const char **argv)
{
(void)t;
if (argc == 1)
gdb_outf("Assert SRST during connect: %s\n",
connect_assert_srst ? "enabled" : "disabled");
else
connect_assert_srst = !strcmp(argv[1], "enable");
if (argc > 1) {
if (!strcmp(argv[1], "attach"))
assert_srst = ASSERT_UNTIL_ATTACH;
else if (!strcmp(argv[1], "scan"))
assert_srst = ASSERT_UNTIL_SCAN;
else
assert_srst = ASSERT_NEVER;
}
gdb_outf("Assert SRST %s\n",
(assert_srst == ASSERT_UNTIL_ATTACH) ? "until attach" :
(assert_srst == ASSERT_UNTIL_SCAN) ? "until scan" : "never");
return true;
}