« on: June 16, 2016, 08:54:19 am »
This topic has been moved to ARM Cortex.
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ERROR! cannot write to info.plist, there are permission problems, or you are on a read-only volume. This cannot run from within a read-only dmg file
When downloading the firmware to KEIL's MCB1800 evaluation board via USART0, you have to set the jumpers J4A - J4D to select boot mode and also jumpers J13 / J16 to select Rx / Tx of USART0 (default position is USART3).
The download into the flash banks by Flash Magic works fine.
When resetting the device, it runs at first sight, but it gets stuck sporadically in the Hard Fault Handler.
You have to set the jumpers J13 / J16 back to USART3 position to avoid sporadic adressing errors on A12 / A13.
I use the TSSOP types on my boards, so it is not possible to program them in the MCB900, and then move it to the target board.
In 2 cases I had the problem that it would only program 1. Time.
Solution problem 1: I had a RS485 chip on the RxT TxT line on the target board, and with no external power on the target board, the RxT line was overloaded. I simply put a 100K resistor in serial with the input on the 485 chip, and it worked fine.
Solution problem 2: To be safe I had placed a 100uF capasitor on the VDD of the LPC, and it is too much, it kills the rise time of the VDD from the programmer. 22uF works.