CCS/TMS570LS1224: LIN driver

Hello,

Lin 2.1 Spec, 1.1.5.1:

The master task decides when and which frame shall be transferred on the bus. The slave tasks provide the data transported by each frame. 

I have a sensor with lin 2.2

And the TMS570LS1224 supports lin2.1

Could the TMS570LS1224  communicate with the sensor??

A LIN 2.2 node is fully compatible with a LIN 2.1 node

Can you please let me know which LIN transceiver is used in your setup? Both master and slave sides should have a transceiver. 

Master node: An external pullup resistor (1kΩ) and a series diode to VSUP must be added to LIN bus.

this is the transceiver which i used

8816.SPI to CAN FD SBC + LIN.pdf

i checked the schematic of the transceiver pullup resistor (1kΩ) and a series diode to VSUP connected to LIN bus.

in the  linSend() function i can checked the signal on oscilloscope just when enabling analog loopback

when i disable the loopback no signal appears on oscilloscope why do i face this problem?

Any updates please

any help?