Segger RTT drivers
Note
Segger drivers works only with J-Link debug probes. Sometimes it’s possible to replace vendor-specific debug interface with J-Link OB firmware. For details look at Segger website
Supported Segger drivers:
Serial over RTT -
CONFIG_SERIAL_RTTx
,Console over RTT -
CONFIG_SERIAL_RTT_CONSOLE_CHANNEL
Segger SystemView -
CONFIG_SEGGER_SYSVIEW
Note RTT -
CONFIG_NOTE_RTT
Segger SystemView
Steps to enable SystemView support:
Make sure your architecture supports a high-performance counter. In most cases it will be:
In that case, the the architecture logic must initialize the perf counter with
up_perf_init()
.Enable instrumentation support:
Configure instrumentation support. Available options for SystemView are:
Make sure that
CONFIG_TASK_NAME_SIZE > 0
, otherwise task/thread names will not be displayed correctlyEnable Note Driver support and disable Note RAM driver:
Enable Note RTT and Segger SystemView support:
Configure RTT channel and RTT buffer size for SystemView:
In case SystemView returns buffer overflow errors, you should increase
CONFIG_NOTE_RTT_BUFFER_SIZE_UP
.