The LPSCI question of KL36

小勇邹 — Tue, 18 Oct 2016 07:37:04 GMT

Hi,

I am using the LPSCI of KL36.I use the example ...\examples\frdmkl46z\driver_examples\lpsci\lpsci_blocking.

1) The SCI is OK when configuring SCI as fellow shown.The data that is sent to the software in my computer is correct.

    lpsci_user_config_t lpsciConfig = {
#if defined(KL02Z4_SERIES)
        .clockSource     = kClockLpsciSrcFll,
#else
        .clockSource     = kClockLpsciSrcPllFllSel,
#endif
        .bitCountPerChar = kLpsci8BitsPerChar,
        .parityMode      = kLpsciParityDisabled,
        .stopBitCount    = kLpsciOneStopBit,
        .baudRate        = BOARD_DEBUG_UART_BAUD
    };

2) But it is not OK when I change ".parityMode = kLpsciParityDisabled," to ".parityMode =kLpsciParityEven".

The data that is sent to the software in my computer is not correct. The software in my computer is also configured as "ParityEven".

Re: The LPSCI question of KL36

kerryzhou — Wed, 19 Oct 2016 05:59:22 GMT

Hi Robin,

Please bitCountPerChar to kLpsci9BitsPerChar, the configuration code should like this:

    // Fill in lpsci config data
    lpsci_user_config_t lpsciConfig = {
#if defined(KL02Z4_SERIES)
        .clockSource     = kClockLpsciSrcFll,
#else
        .clockSource     = kClockLpsciSrcPllFllSel,
#endif
        .bitCountPerChar = kLpsci9BitsPerChar,//kLpsci8BitsPerChar,
        .parityMode      = kLpsciParityEven,//kLpsciParityDisabled,
        .stopBitCount    = kLpsciOneStopBit,
        .baudRate        = BOARD_DEBUG_UART_BAUD
    };
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Then test it again, your PC will receive the correct data.

Reason: if you enable the parity mode, and still select 8-bit Mode, because the parity still one bit, then the data in the uart wave will be 7 bit data+1 bit parity.

Anyway, when you want to use the parity mode, please select 9 bits mode.

Wish it helps you!

Have a great day,
Kerry

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