LAUNCHXL-TMS57004: SPI communication between TMS57004 and TM4C1294 XL

GUNIT SINGH

Part Number: LAUNCHXL-TMS57004
Other Parts Discussed in Thread: TMS570LS0432, HALCOGEN

Dear All,

I need to communicate between TMS57004 (SPI Master) and TM4C1294 XL (SPI Slave) using SPI. I have connected following pins.

Master

J1-Pin 7 Clock

J1- Pin8- CS

J2- Pin6-SIMO

J2-PIN7-SOMI

Slave

PA2-Clock

PA3-CS

PA4-Rx

PA5-Tx

I have connected Rx to Simo in case 1 and Rx to Somi in case 2. But in both case I am able to send data from master correctly. But Slave is not receiving it correctly.

I am sending 6 bytes using master and trying to receive those using slave.0218.MIBSPI1.rar 1731.SPI_Slave.rar

Output of Master Board:

Output of Slave:

Please help me in resolving the issue.

Regards,

Gunit

over 7 years ago

0 QJ Wang over 7 years ago

TI__Guru**** 197336 points

Hi Gunit,

Do master and slave have the same settings: data length, clock phase, polarity? Does not the slave get any data? The slave should use the interrupt mode, and starting the code first to wait for the coming clock and data from the master.

Any question related to TM4C API, please post to TM4C forum. I don't see the slave code on TMS570LS0432.

0 GUNIT SINGH over 7 years ago in reply to QJ Wang

Intellectual 690 points

Sir,

I have set data length as 6 bytes and we are transmitting 16 bits at a time.

Should we add some slave code on TMS57004.

Regards,
Gunit

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

Intellectual 690 points

Sir,

My slave is using these setting for SPi.
idle clock level low and active low clock in freescale SPI mode 0, slave mode, 1MHz SSI frequency.

How to set these in Halcogen?

Regards,
Gunit

0 QJ Wang over 7 years ago in reply to GUNIT SINGH

TI__Guru**** 197336 points

Hi Gunit,

If you only use TMS570 as master, you don't need the slave code on TMS570. TMS570 MCU supports those 4 clock modes, and each mode is defined in the following table:

Both master and slave should use the same clock mode. Master uses 16-bit data length, the slave have to use the same data length.

Arm-based microcontrollers

Arm-based microcontrollers forum

LAUNCHXL-TMS57004: SPI communication between TMS57004 and TM4C1294 XL