topic MPC5xMUC FlexCAN Tx and Rx interrupt question in MPC5xxx

MPC5xMUC FlexCAN Tx and Rx interrupt question

大大许 — Fri, 20 Oct 2017 08:02:08 GMT

I want to konw MPC5744 FlexCAN module hasn't a send completion entry interrupt function and a receive completion entry interrupt function?

I through computer software to send a standard data frame to my evaluate board , I through check interrupt flag to read data. But i want to process the receive data by receiving interrupts, I set FlexCAN Interrupt mask regiseter to enable interrupt receive function. But this code is not triggle interrupt function,the corresponding interrupt register is already in set 1.

Re: MPC5xMUC FlexCAN Tx and Rx interrupt question

aero72 — Fri, 20 Oct 2017 09:27:16 GMT

Make certain you're clearing the interrupt and also 'New data in buffer' flags by writing a '1' to the relevant register bit to clear it. Only by doing this will you know whether you're getting a new message or re-processing an old one.

Re: MPC5xMUC FlexCAN Tx and Rx interrupt question

大大许 — Fri, 20 Oct 2017 12:38:03 GMT

Hi,

I'm sure that the corresponding flag bits in the interrupt flag register are clear, and I'm sure that the data received by querying is up to date, not the previous one.

The code received a standard data frame by compute software ,the relevant interrupt mask register bit is enable ,and relevant interrupt flag register is set.

The program does not perform interrupt subroutines .

thanks

Re: MPC5xMUC FlexCAN Tx and Rx interrupt question

大大许 — Sat, 21 Oct 2017 08:16:04 GMT

FlexCAN interrupt setting is follow

INTC_0.PSR[524].B.PRIN = INT_CAN_PRIORITY; //CAN ISR IRQ CPU degree

CAN[nbModule]->IMASK2.R = 0x00000000; //FlexCAN module
CAN[nbModule]->IMASK1.R = 0x00F00000; //set MB[8] receive interrupt and MB[9] send interrupt

Is there anything wrong with my setup?

Re: MPC5xMUC FlexCAN Tx and Rx interrupt question

PetrS — Mon, 23 Oct 2017 06:21:22 GMT

Hi,

CAN[nbModule]->IMASK1.R = 0x00F00000; does not enable MB8 and MB9 interrupt. In fact it enables MB23-MB20 interrupts.

You should use CAN[nbModule]->IMASK1.R = 0x00000300; //set MB[8] receive interrupt and MB[9] send interrupt

BR, Petr

Re: MPC5xMUC FlexCAN Tx and Rx interrupt question

wongdavid — Wed, 25 Oct 2017 00:33:15 GMT

5744中的can通信，你处理过接收端可以让接收端一对多通信吗？

Re: MPC5xMUC FlexCAN Tx and Rx interrupt question

剑明肖 — Mon, 15 Jan 2018 03:23:20 GMT

5744中CAN通信，接收多个不同messgeID的模式（接收端一对多通信），你能成功吗？我没搞定