User’s Manual of Board Microcontroller “ET-ARM STAMP STM32 (Cortex-M3)
after user has already tested program completely, it will be error as mentioned above. We recommend user
to initially solve mistake as follows;
problem and decrease the
Don’t set Baud Rate
for downloading and using
with different parameter values; it is the best if setting them with the same value.
If user tests the operation of the written program that does not use any RS232, user must remove RS232 Cable from board instantly to reduce data that is junk or garbage in Buffer of RS232 after download code completely.
If Code Command in program of MCU runs as printing data through Port RS232 all the time, user must reset MCU to stop transmitting data to Port RS232 before opening Program Flash Loader to download new Code. In this case, user resets it to run in Boot Loader first and then open Program Flash Loader.
If it is Converter that converts Port USB/RS232, user must remove USB Cable before opening Program Flash Loader to clear data in Buffer first, re-plug USB cable and wait for awhile and
finally, user can without any problem.
If your computer has Port RS232 more than 1; we recommend user to separate Port RS2232 for download and use independently.