Under Component Inspector window, I had lpuart1 configured with 9 bits data, and parity mode disabled. The 9th bit is utilized as address wake up. I was unable to set the 9th bit to high for the first byte in my data packet. The API LPUART_DRV_SendData() only allows me to send 8-bits data byte. I was trying to use LPUART_BWR_CTRL_R9T8() to set T8 bit to "1" but it didn't work, the 9th bit is still read as "0". How do I set the initial byte's 9th bit to "1" and clear it to "0" for the subsequent bytes? The following is the start of my transmission and obviously it doesn't work.
LPUART_BWR_CTRL_R9T8(base, 1); // set 9th bit to 1, that's my intention
LPUART_DRV_SendData(FSL_LPUARTCOM1, &txBuff1, 1U); // Send first byte
lpuartState->isTxBusy = true;
// Tx interrupt enabled
LPUART_HAL_SetIntMode(base, kLpuartIntTxDataRegEmpty, true);
LPUART_HAL_SetIntMode(base, kLpuartTxComplete, true);