Ouss4 commented on a change in pull request #3470:
URL: https://github.com/apache/incubator-nuttx/pull/3470#discussion_r609012023
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File path: Documentation/platforms/xtensa/esp32/boards/esp32-devkitc/index.rst
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@@ -44,7 +113,31 @@ Configurations
nsh
---
-Basic NuttShell configuration (console enabled in UART0, exposed via USB
connection, at 115200 bps).
+Basic NuttShell configuration (console enabled in UART0, exposed via
+USB connection, at 115200 bps). Note the following:
+
+1. Uses the CP2102 USB/Serial converter for the serial console.
+
+2. I have only tested this in IRAM with UART reconfiguration disabled.
+ See "Sample Debug Steps". In that case, NuttX is started via GDB.
+ It has, however, been reported to me that this configuration also
+ runs when written to address 0x1000 of FLASH with the esptool.py
+ (as described above). Then NuttX is started via the second level
+ bootloader. I cannot vouch for that since I have never tried it.
+
+3. There are open clocking issues. Currently clock configuration
+ logic is disabled because I don't have the technical information
+ to provide that logic -- hopefully that is coming. As a
+ consequence, whatever clock setup was left when NuttX started is
+ used. For the case of execution out of IRAM with GDB, the
+ settings in boards/xtensa/esp32/esp32-devkitc/include/board.h work.
+ To check the timing, I use a stop watch and::
+
+ nsh> sleep 60
+
+ If the timing is correct in the board.h header file, the value
+ timed with the stop watch should be about 60 seconds. If not,
+ change the frequency in the board.h header file.
Review comment:
Both 2 and 3.
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