[参考译文] PROCESSOR-SDK-AM64X：UART 轮询读取中存在错误

static uint32_t UART_fifoRead(UARTLLD_Handle hUart, uint8_t *buffer,
                              uint32_t readSizeRemaining)
{
    uint32_t tempReadSizeRemaining = readSizeRemaining;
    uint32_t size    = tempReadSizeRemaining;
    Bool isRxReady = FALSE;
    uint8_t *tempBuffer = buffer;

    isRxReady = UART_statusIsDataReady(hUart);

    while (((Bool)TRUE == isRxReady) && (0U != readSizeRemaining))
    {
        /* once the H/w is ready  reading from the H/w                        */
        *tempBuffer = (UInt8) UART_readByte(hUart);
        tempBuffer++;
        --tempReadSizeRemaining;

        isRxReady = UART_statusIsDataReady(hUart);
    }

    return (size - tempReadSizeRemaining);
}