SK-AM62: How to use the interrupt + callback mode of spi in M4F？

owens shi

Part Number: SK-AM62
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

hi ,team

We want to know how to use the interrput +callback pattern of spi. We mentioned this pattern in the spi documentation introduction, but we couldn't find this way in the example.

Background:

AM62x M4F (no rtos) acquires external data via spi at an accurate time point

We need to minimize the situation of m4F dead waiting during spi transmission as much as possible

I tried the following configuration, but the runtime got stuck in some underlying spi api.

my spi confg

stuck in

over 1 year ago

0 Vaibhav Kumar over 1 year ago

TI__Guru 58285 points

Hi,

Based on the FAQ: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1414084/faq-sk-am64b-mcspi-integration-guide/5428405#5428405 please correct the SysConfig settings for MCSPI.

Once done, do let me know, we can move forward.

Regards,

Vaibhav

0 owens shi over 1 year ago in reply to Vaibhav Kumar

Intellectual 290 points

hi,

here is new syscfg setting ,but still stuck in MCSPI_mastertIsr

1. Works fine when running single-step. It gets stuck when running at full speed.

2. The position of the stuck point is MCSPI_continueTxRx. At this time, the int state flag is: RX0_full + EOW

0 Vaibhav Kumar over 1 year ago in reply to owens shi

TI__Guru 58285 points

Hi,

owens shi said:
RX0_full + EOW

Could you tell me if EOW is end of word or end of interrupt.

owens shi said:
1. Works fine when running single-step. It gets stuck when running at full speed.

I believe you meant to say, that the application works fine when debugging step by step but in a single shot/single go when you run the application, it gets stuck.

owens shi said:
2. The position of the stuck point is MCSPI_continueTxRx

Thanks for letting me know the point where it is stuck at.

Please let me know which SDK version you are using currently.

Regards,

Vaibhav

0 owens shi over 1 year ago in reply to Vaibhav Kumar

Intellectual 290 points

hi,

"Could you tell me if EOW is end of word or end of interrupt"

here is EOW register means

1. "I believe you meant to say, that the application works fine when debugging step by step but in a single shot/single go when you run the application, it gets stuck."

Yes

2. SDK:mcu_plus_sdk_am62x_10_01_00_33

0 Vaibhav Kumar over 1 year ago in reply to owens shi

TI__Guru 58285 points

Thank you for your response.

0 Vaibhav Kumar over 1 year ago

TI__Guru 58285 points

Hi Owens,

owens shi said:
We want to know how to use the interrput +callback pattern of spi.

Please have a look at the following application: https://github.com/TexasInstruments/mcupsdk-core/tree/next/examples/drivers/mcspi/mcspi_loopback_interrupt_lld/am64x-sk/r5fss0-0_nortos

Here, we have defined the callback function for MCSPI along with Interrupt mode of operation.

Regards,

Vaibhav

+1 Yong Zhang over 1 year ago in reply to Vaibhav Kumar

TI__Mastermind 20021 points

Dear Owens.

spiTransaction should be valid when the complete transaction done.

please let us know if it fix your problem to put it as global variable.

/opt/1Twork/repository/mcu_plus_sdk_am62x_10_01_00_33/examples/drivers/mcspi/mcspi_loopback/mcspi_loopback.c

void *mcspi_loopback_main(void *args)
{
// int32_t status = SystemP_SUCCESS;
uint32_t i;
int32_t transferOK;
MCSPI_Transaction spiTransaction;

DebugP_log("[MCSPI] Loopback example started ...\r\n");

thanks a lot!

yong

Processors

Processors forum

SK-AM62: How to use the interrupt + callback mode of spi in M4F？