mpc5748G Uart overrun

dany_amsalem — Sun, 16 Jun 2019 09:02:59 GMT

i'm working on the DEVKIT MPC5748G rev D under the S32 IDE.

I have a problem with missing RX byte in UART_4,

My UART code based on the uart pal example (S32144_SDK01).

in my setup i'm using 2 CAN interfaces which both sends messages interleaved with 1msec each and in at the same time i'm trying to transfer file via UART in the rate of 921600 bps.

it seems that, each time UART4 receives byte inside CAN irq handler time it miss it and the next byte is declared as overrun (both events are in the CAN IRQ handler time).

in the attached file you can see the time sharing between IRQ handlers (CAN, uartTX, uartRx, uartErr), blue circle represent the missing uart rx byte.

I check the signals

any idea why i'm missing this byte ? nothing is shared between both in aspect of signals or code.

Tanks in advance

Dany

Re: mpc5748G Uart overrun

dany_amsalem — Tue, 18 Jun 2019 07:47:50 GMT

Closed.

the RX can handler disabled other interrupts.

topic Re: mpc5748G Uart overrun in S32 SDK

mpc5748G Uart overrun

Re: mpc5748G Uart overrun