EK-TM4C1294XL: Enabling receive interrupt in SSI Slave mode

GUNIT SINGH

Part Number: EK-TM4C1294XL

Dear All,

i am using TMS -57004 as SSI master and TM4C1294 XL as SSI slave. I want to generate an interrupt when the master start sending the data to slave. How can i do that?

Regards,

Gunit

over 7 years ago

0 Bob Crosby over 7 years ago

TI__Guru 72500 points

To be clear, you want to generate an interrupt in the TM4C1294 on the start of the SSI transmission? Typically the interrupt is only generated when the transmission is completed. Are you using the CS signal from the TMS570LS04xx ? You can tie that signal to a GPIO port on the TM4C1294 and use it to generate a GPIO interrupt.

0 GUNIT SINGH over 7 years ago in reply to Bob Crosby

Intellectual 690 points

Thank you sir

0 GUNIT SINGH over 7 years ago in reply to Bob Crosby

Intellectual 690 points

Sir,

TM4C1294 generates an interrupt automatically on SSI transmission or we need to enable it.

If we need to enable then can you share some sample code regarding the same?

Regards,
Gunit

0 GUNIT SINGH over 7 years ago in reply to Bob Crosby

Intellectual 690 points

Yes, I am using CS from TMS57004

0 Bob Crosby over 7 years ago in reply to GUNIT SINGH

TI__Guru 72500 points

The SSI interrupts must be enabled. I will see if I can code up an example for you.

0 Bob Crosby over 7 years ago in reply to GUNIT SINGH

TI__Guru 72500 points

OK, here is an example project that uses SSI2 as a master and SSI3 as a slave. The slave is interrupt driven. The master sends a string of up to 64 bytes. The slave receives the string and stores it in a buffer. It disables its own interrupt and sets a flag when it receives the NULL which terminates the string. Import the project into CCS from the attached .zip file.

/cfs-file/__key/communityserver-discussions-components-files/908/SPI_5F00_master_2D00_Slave_2D00_Interrupt.zip

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EK-TM4C1294XL: Enabling receive interrupt in SSI Slave mode