TMS570LS0914: Using mibspi in slave mode

Konstanty Kuczynski1

Part Number: TMS570LS0914
Other Parts Discussed in Thread: HALCOGEN, TMS570LS1224

Dear support team,

i want to communicate with futher device unsing a isolated network high-speed transceiver (spi4 = TX, mibspi5 = RX). The transmitted and received data is 6 * 8 Bytes. Everytime a data is sent (spi4) to the transceiver, an echo of this data is generated and sent back (mibspi5). This data can be ignored by the application. However, the subsequent response of 6 * 8 Bytes should be received correctly, which is currently not working.

Im sending data using spiTransmitData function, which works correctly. Im trying to receive data using mibspiGetData(mibspiREG5, 0, receiveData) with "uint16_t receiveData[AFE_SPI_LENGTH]", but the received buffer is allways filled up with zeros.

Can someone help me and tell me what other settings I need to make?

Kind regards

Konstanty

over 5 years ago

0 Konstanty Kuczynski1 over 5 years ago

Intellectual 310 points

Part Number: TMS570LS0914

Dear forum members,

im using two different SPI Ports for the communication wird other device. The communication is structured so that I first send a message via SPI 5, and after about 20us an answer to SPI 4 is expected. My problem is, that the spiReceiveData function stuck in the while loop when using the generated halcogen code.

I would be very happy to receive assistance.

Kind regards

Konstanty Kuczynski

0 Miro over 5 years ago

TI__Mastermind 21425 points

Hello,

How are you feeding SPI4 with clock?

0 Konstanty Kuczynski1 over 5 years ago in reply to Miro

Intellectual 310 points

Hello Miro,

to be more precise, I want to communicate with the Isolated Network High-Speed Transceiver MC33664. Every time a frame is send or received, the transceiver is generating a clock signal.

Kind regards,

Konstanty

0 Miro over 5 years ago in reply to Konstanty Kuczynski1

TI__Mastermind 21425 points

Hello,

Attached is project that uses TMS570LS1224 as a slave. The MCU in the project is different but can be used as reference.

7181.MIBSPI_SLAVE_TMS570LS1224PGE.ZIP

0 Konstanty Kuczynski1 over 5 years ago in reply to Miro

Intellectual 310 points

Hi Miro,

thanks for the example. I've adjusted my settings to the example. Nevertheless my buffer is always filled with 0. I try to read the echo of the sent message (spi4) with mibspi (spi5) by calling the function mibspiGetData directly after sending the message. This is the data I send out {0x00, 0x01, 0x01, 0x00, 0x02, 0x85} and receive (CH1-spi4_TX, CH2-mibspi5_RX, CH3-micspi5_CS0, CH4-mibspi5_CLK):

BecauseI always expect data packets of 6*8Byte, I call the function as follows:

How can it be that the buffer or ram->rx contains only zeros? Why is the data not received?

The mibspiInit function can be found in the appendix. 3463.mibspiInit.txt

0 Miro over 5 years ago in reply to Konstanty Kuczynski1

TI__Mastermind 21425 points

Hello,

Please, check whether TGENA bit for TG0 is set.

0 Konstanty Kuczynski1 over 5 years ago in reply to Miro

Intellectual 310 points

Hello,

TGENA is before and after the call of mibspiGetData equal 0. Content of TG0CTRL is 0x40700000.

I just tried to enable mibspiTransfer before calling spiIf_transmitPolling. Still no data could be received.

Do I still have to use mibspiSetData and mibspiTransfer at one point, although I only want to receive data?

Kind regards,

Konstanty

0 Konstanty Kuczynski1 over 5 years ago in reply to Konstanty Kuczynski1

Intellectual 310 points

Hello,

I have now performed the mibspiSetData and mibspiTransfer directly after the init. Since then I receive correct data. Thank you very much for your help.

Kind regards

Konstanty

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TMS570LS0914: Using mibspi in slave mode