Problems caused by two letters

A period of time to help customers do a case, the details do not say, anyway, is a block board, the function has, today customers call said serial port can not be used, let me see, I looked for a long, finally found that the original is a serial port configuration program error, because it was formulated into BOARD_UART_TX, but I wrote BOARD_EB_UART_TX, the result because no error, so this problem wasted half of my time, but also check the hardware, but also check the software ...

Must have a long memory, to be careful, to add good comments ... But when the case is urgent, it really will cause this problem because of worry, especially the problem that will not be error ... Hey, no solution.

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Problems caused by two letters