Compiler/HERCULES_SAFETY_MCU_DEMOS: TMS570LS3137 - Hercules - SPI2

Daniela Sanna

Part Number: HERCULES_SAFETY_MCU_DEMOS

Tool/software: TI C/C++ Compiler

Hi,

I'm configured SPI1, SPI2, SPI3 and SPI4 use Halcogen. SPI1, SPI3 and SPI4 work very good, but i have some problems with SPI2.

When i use spiTransmitAndReceiveData(spiBASE_t *spi, spiDAT1_t *dataconfig_t, uint32 blocksize, uint16 * srcbuff, uint16 * destbuff), the transmission fail at first byte:

Spi->IntFlg = 0x01000210 = BITERRFLG is 1. I try one SPI for time, i try to send same message.

Can you help me please?

p.s: I use SPI2 without any slave in this moment, i view signals with oscilloscope.

over 4 years ago

0 QJ Wang over 4 years ago

TI__Guru**** 186256 points

Hello,

Which package of TMS570LS3137 is used in your test? The 144 PGE package doesn't have SPI2.

BITERRFLG: 4th bit of SPIFLG

This bit error can be an excessively high bit rate, capacitive load, or another master/slave trying to transmit at the same time.

BUFINITACTIVE: Multi-buffer RAM is still being initialized. This bit should be set for SPI2 since it doesn't support Multi-buffered mode.

0 Daniela Sanna over 4 years ago in reply to QJ Wang

Prodigy 150 points

Hi wang,

thank you for answer, my uC is TMS570LS3137ZWT. It have SPI2, no multi-buffer is setting. Freq is 800kHz, i try with 300kHz, but it the same error.

Could it be because it is connected to the module for MICROSD without MICROSD?

Thank you,

Daniela

0 QJ Wang over 4 years ago in reply to Daniela Sanna

TI__Guru**** 186256 points

Hello Daniela,

Transmitting data to an unconnected SPI slave will not cause any problem.

0 Daniela Sanna over 4 years ago in reply to QJ Wang

Prodigy 150 points

0 Daniela Sanna over 4 years ago in reply to QJ Wang

Prodigy 150 points

0 Daniela Sanna over 4 years ago in reply to Daniela Sanna

Prodigy 150 points

0 Daniela Sanna over 4 years ago in reply to Daniela Sanna

Prodigy 150 points

0 QJ Wang over 4 years ago in reply to Daniela Sanna

TI__Guru**** 186256 points

Nothing wrong with your configuration.

I used the same settings, and did not see biterr. As datasheet says that the BITERR might be caused by high bit rate, capacitive load, or another master/slave trying to transmit at the same time.

Arm-based microcontrollers

Arm-based microcontrollers forum

Compiler/HERCULES_SAFETY_MCU_DEMOS: TMS570LS3137 - Hercules - SPI2