Hi, I am using the LIN stack contained in the S32 SDK for s32k118 and i need to know how the LIN driver works internally. I´m trying to understand how the driver manages to send/TX multiple bytes inside the same Interrupt handler (LIN_LPUART1_RxTx_IRQHandler)
From my understanding, a LIN response can contain multiple data bytes, so if the interrupt is triggered because the driver have received 1 byte, the driver should be able to respond with multiple data bytes as described in the Figure 2.3. However, inspecting the code
if (LPUART_GetStatusFlag(base, LPUART_RX_DATA_REG_FULL))
{
/* Get data from Data Register & Clear LPUART_RX_DATA_REG_FULL flag */
LPUART_Getchar(base, &tmpByte);
/* Process data in Data Register while receive, send data */
LIN_LPUART_DRV_ProcessFrame(instance, tmpByte);
}
I see that only one call of LPUART_PutChar() is made every LPUART_RX_DATA_REG_FULL interrupt is triggered, so i think that only only one byte is transmitted for each byte received. Could anybody clarify this? Thanks
