ASSERT ERROR fsl_lpuart.c line 831

[z_zhou]

Hi NXP

I'm doing a real-time transmission with a lot of data by using I.MXRT1060 board. When I started to send data, the assert error came out in a while. 

Then the data tramnsmission stoped. 

Could you help me figurt out this pls?

Thanks

[victorjimenez]

Hello Zhou Zhou,

The problem you are having it's in the assert of the following function. 

/*!
 * param base LPUART peripheral base address.
 * param data Start address of the data to write.
 * param length Size of the data to write.
 */
void LPUART_WriteBlocking(LPUART_Type *base, const uint8_t *data, size_t length)
{
    assert(data);

    /* This API can only ensure that the data is written into the data buffer but can't
    ensure all data in the data buffer are sent into the transmit shift buffer. */
    while (length--)
    {
        while (!(base->STAT & LPUART_STAT_TDRE_MASK))
        {
        }
        base->DATA = *(data++);
    }
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

The behavior you are facing is due to problems with the parameter "data" of the function. I have some questions: How are you calling this function in your application? Are you sending const data? Are you passing start address of the data you want to write?

Have a great day,
TIC

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