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arm_tpiu_swo: fix autodetection of SWO pin frequency 

While the documentation reports that SWO pin frequency can be
omitted to let the adapter autodetect the value, the code wrongly
drops an error when pin frequency is not specified.

Don't require the pin frequency to be set at "enable", but verify
that the adapter has properly changes it to a valid value.

Change-Id: I3dfbe3256e8887ef4f03512769b06381cdc9db0d
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reported-by: Karl Palsson <karlp@tweak.net.au>
Fixes: 184724d14e ("arm_tpiu_swo: add support for independent TPIU and SWO")
Reviewed-on: https://review.openocd.org/c/openocd/+/6310
Tested-by: jenkins
Reviewed-by: zapb <dev@zapb.de>
This commit is contained in:
Antonio Borneo 2021-06-09 11:27:57 +02:00
parent 1b716b9d0d
commit 00d4699d0b
1 changed files with 13 additions and 4 deletions
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17
src/target/arm_tpiu_swo.c
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@ -625,10 +625,8 @@ static int jim_arm_tpiu_swo_enable(Jim_Interp *interp, int argc, Jim_Obj *const
}
if (obj->pin_protocol == TPIU_SPPR_PROTOCOL_MANCHESTER || obj->pin_protocol == TPIU_SPPR_PROTOCOL_UART)
if (!obj->swo_pin_freq) {
LOG_ERROR("SWO pin frequency not set");
return JIM_ERR;
}
if (!obj->swo_pin_freq)
LOG_DEBUG("SWO pin frequency not set, will be autodetected by the adapter");
struct target *target = get_current_target(cmd_ctx);
@ -731,6 +729,17 @@ static int jim_arm_tpiu_swo_enable(Jim_Interp *interp, int argc, Jim_Obj *const
return JIM_ERR;
}
if (obj->pin_protocol == TPIU_SPPR_PROTOCOL_MANCHESTER || obj->pin_protocol == TPIU_SPPR_PROTOCOL_UART)
if (!swo_pin_freq) {
if (obj->swo_pin_freq)
LOG_ERROR("Adapter rejected SWO pin frequency %d Hz", obj->swo_pin_freq);
else
LOG_ERROR("Adapter does not support auto-detection of SWO pin frequency nor a default value");
arm_tpiu_swo_close_output(obj);
return JIM_ERR;
}
if (obj->swo_pin_freq != swo_pin_freq)
LOG_INFO("SWO pin data rate adjusted by adapter to %d Hz", swo_pin_freq);
obj->swo_pin_freq = swo_pin_freq;