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-rw-r--r--nuttx/configs/c5471evm/README.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/nuttx/configs/c5471evm/README.txt b/nuttx/configs/c5471evm/README.txt
index 0c479a89c..f984a6a90 100644
--- a/nuttx/configs/c5471evm/README.txt
+++ b/nuttx/configs/c5471evm/README.txt
@@ -81,6 +81,13 @@ ARM/C5471-specific Configuration Options
CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
+ CONFIG_ARCH_CALIBRATION - Enables some build in instrumentation that
+ cause a 100 second delay during boot-up. This 100 second delay
+ serves no purpose other than it allows you to calibratre
+ CONFIG_ARCH_LOOPSPERMSEC. You simply use a stop watch to measure
+ the 100 second delay then adjust CONFIG_ARCH_LOOPSPERMSEC until
+ the delay actually is 100 seconds.
+
C5471 specific device driver settings
CONFIG_SERIAL_IRDA_CONSOLE - selects the IRDA UART for the