RM48L952: Transmit and Receive 9kBytes of large-capacity data using DCAN1/2/3 with DMA and SCI with DMA

Hi,

The CAN module has three interfaces (IF1, IF2, and IF3). The IF3 can be configured to automatically receive control and user data from the Message RAM when a message object has been updated after reception of a CAN message. The CPU does not need to initiate the transfer from Message RAM to IF3 Register set.

Attached is an example of using IF3+DMA to receive message:

2437.TMS570LS0914PZ_DCAN_IF3_DMA.zip

I don't have example of CAN transmit with DMA.

Hi,

thanks for your reply

But I tested the example you sent me on RM48L952, but it doesn't work.

I'm sorry but have you ever tested your exmaple?

Please, Help me

mibSpiDmaTxRx_20220412.zip

I tested attached file.

MibSpi1 Tx and mibSpi3 RX are normal, but mibSpi3 Tx data MibSpi1 Rx data is strange. Is this correct?

if you can check, please let me know what is wrong.

Yong-Gil Kim said:

I'm sorry but have you ever tested your exmaple?

Yes, I tested this example on LS0914 platform.

Yong-Gil Kim said:

MibSpi1 Tx and mibSpi3 RX are normal, but mibSpi3 Tx data MibSpi1 Rx data is strange. Is this correct?

What is the problem? The code looks good to me.

thanks for your response

In this example, mibspi3 receives what is transmitted from mibspi1 and mibspi1 receives what is transmitted from mibspi3 using dma.
The transmission data of mibspi1 increases by 1 from 0, and the received data of mibspi3 match. However, the transmission data of mibsp3 is a value that increases by 1 from 128, but the received data of mibspi1 is not the same. is this correct?

Yong-Gil Kim said:

However, the transmission data of mibsp3 is a value that increases by 1 from 128, but the received data of mibspi1 is not the same. is this correct?

No, the mibspi1 received data don't match the mibspi txed data. 

Did you check if the mibspi3 TX data is correct? and check the data in mibspi3 message RAM.