Fix TPIU initialization in platformio.ini to comply with the newer Op…

…enOCD syntax

README.md

@@ -27,7 +27,7 @@ swo_trace_clkin_freq = 64000000
 and 
 
 ```py
-  -c "tpiu config internal - uart off 64000000"
+  -c "nucleo_f103rb.tpiu configure -traceclk 64000000"
 ```
 
 clock values. This **must** be the HCLK frequency / CPU frequency that the microcontroller is setup to run with in the firmware.

platformio.ini

@@ -21,12 +21,22 @@ swo_trace_clkin_freq = 64000000
 ; if you want to see SWO outputs during debugging, a custom
 ; debug server invocation must be used.
 ; adapt interface and target accordingly.
+; this entails changing the traceclk parameter to match
+; the swo_trace_clkin_freq above.
+; the SWO pin frequency param is irrelevant, since we are forwarding to
+; tcl_trace, but OpenOCD will otherwise fail to enable the TPIU.
 ; this is used when starting debugging, not in the SWO Viewer task.
 ; after debugging starts, one must manually start the swo_viewer.py with
 ; python swo_parser.py --dont-run
 debug_server = $PLATFORMIO_CORE_DIR/packages/tool-openocd/bin/openocd
   -f $PLATFORMIO_CORE_DIR/packages/tool-openocd/scripts/interface/stlink.cfg
   -f $PLATFORMIO_CORE_DIR/packages/tool-openocd/scripts/target/stm32f1x.cfg
-  -c "tpiu config internal - uart off 64000000"
+  -c "tpiu create nucleo_f103rb.tpiu -dap nucleo_f103rb.dap -ap-num 0"
+  -c "nucleo_f103rb.tpiu configure -protocol uart"
+  -c "nucleo_f103rb.tpiu configure -output -"
+  -c "nucleo_f103rb.tpiu configure -traceclk 64000000"
+  -c "nucleo_f103rb.tpiu configure -pin-freq 2000000"
+  -c "nucleo_f103rb.tpiu configure -formatter 0"
   -c "itm ports on"
+  -c "nucleo_f103rb.tpiu enable"
   -c "tcl_port 6666"