View source for How to debug with Serial Wire Viewer tracing on STM32MP15

This article provides some setup information for STM32MP15 serie, debugging Cortex-M in ''Production Mode''. It does not intend to cover all STM32CubeIDE Serial Wire Viewer (SWV) capabilities; complete information is available in  ([[STM32MP15 resources#UM2609|UM2609]]), chapter 4. 
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In that mode, the available console on the board (UART4) is used by Cortex-A Linux. The clock tree is managed by Linux and 'Trace clock' needed to setup SWO is available from Linux console with command:  <br>
'''''awk '/ck_trace/{print $5}' /sys/kernel/debug/clk/clk_summary'''''
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In order to test, let's modify main.c file from a generated project with a looping variable 'i', as depicted hereafter.
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[[File:Swv-traceclk-linux-main.png|frame|center|''Trace clock from Linux console'']]
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Then, setup debug configuration, enabling SWV and setting the clock: 133.25MHz here.
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[[File:Swv-dbg-cfg.png|frame|center|''Debug Configuration with SWV enabled]]
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Stopping Debug session, open Serial Wire Views:  ''Window > Show View > Other... > SWV > SWV Trace Log & SWV Data Trace''. <br>
In ''SWV Trace Log > Configure Trace'' menu, setup ''Comparator 0'' in order to spy variable 'i'. 
[[File:SWVConfigureTraceButton.png|none|frameless]]
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[[File:Swv-settings.png|frame|center|''SWV Setting'']]

Then start the trace [[File:SWVStartTraceButton.png|none|frameless]]
Resuming debug session gives inside ''SWV Data Trace'' view the corresponding graphic.  
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[[File:Swv-data-trace.png|frame|center|''SWV Data Trace Output'']]



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[[Category:STM32CubeIDE|51]]
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