Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

AURIX™ Forum Discussions

User21797
Level 2
First solution authored 10 questions asked 10 sign-ins
Level 2

Hi there,

I have 2 confusion:

1. How RxFIFO work, from manual figure 20-34, it shown in RxFIFO each received data will come with a status:

 

User21797_1-1657869069614.png

But from actual testing I can't read any status data from RxFIFO. E.g. if I have 2 SPI transaction, I only read out 2 data 'D' but no 'S' status data from RX_EXIT

 

2. Difference between RxFIFO batch move and combine interrupt mode. The batch mode description is 'an interrupt is generated only at one point in the RXFIFO, when the filling level rises above the programmed threshold' and combined mode is 'RXFIFO generates interrupt each time a data is written to it above the preprogrammed
level'. From how I comprehend their description are exactly the same: RxFIFO will give me an interrupt signal whenever RxFIFO fill level exceed GLOBALCON1.RXFIFOINT. So e.g. if I said GLOBALCON1.RXFIFOINT to 1, I will receive an interrupt signal when RxFIFO fill level is 2? And so far this is also the result I get from testing. I do 2 SPI transaction and can only receive interrupt signal when GLOBALCON1.RXFIFOINT set to 1, setting to 2 will have nothing. So what's their difference? 

Thanks for reading, any reply is appreciated.

0 Likes
2 Replies
Nambi
Moderator
Moderator 250 sign-ins 100 replies posted 10 likes received
Moderator

Hi,

Could you check it based on how RXFIFO is handled in the example?

https://github.com/Infineon/AURIX_code_examples/tree/master/code_examples/SPI_CPU_1_KIT_TC275_LK

Best Regards.

0 Likes
cwunder
Employee
25 likes received 25 solutions authored 100 sign-ins
Employee

Concerning the STATUS in the RxFIFO. This only happens if you enable GLOBALCON.SI=1

cwunder_0-1657908785830.png