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Trying to program TC233 via ft232rl usb serial using memtool and have no luck to do that , no communication , mcu responds to custom bootloader , maybe any hints / tips about my problem ?
check the UART VCOM ports of your board that is connected to PC via USB. The you will get the data in the serial Monitor. Or if you are transmitting any data for example "Hello World!" then you should connect and oscilloscope to Tx pin to check if your board is transmitting or not.
I would add to NeerajSDI comments to observe both the Rx (P15.3) and Tx (P15.2) pins of the TC233. The problem could be on either the PC side or device side or both.
To ensure you are entering the BSL mode correctly on the TC233. Bring up the TC233 in BSL mode and send a binary zero byte to the TC233 (8-N-1, baudrate between 28K...250K). If the TC233 is truly in BSL mode it will send an acknowledge byte (value 0xD5) indicating it is ready (trying to match the baudrate at which you sent the zero byte).
