Kinetis Design StudioのトピックRe: SDK 1.3 DSPI interrupt handler issue

SDK 1.3 DSPI interrupt handler issue

rhermes — Wed, 25 May 2016 01:32:24 GMT

SDK 1.3 DSPI issue.

I am attempting to use the DSPI driver functions. They appear to initialize properly, but when I do a blocking transfer it never comes back.

Looking at the link map it appears that the default interrupt handler is still installed for SPI.

I am using the SDK and MQX as libraries.

The SDK build includes fsl_dspi_irq.c.

What can cause SPI2_IRQHandler() to not be linked into the SPI interrupt vector.

I'm building everything for MK22FX processor.

Alice_Yang — Fri, 27 May 2016 02:24:38 GMT

Hello Randy,

- The spi interrupt function is "SPI2_IRQHandler()"?

Please tell me the whole part number of your chip , how many SPI module does it have ?

- You can check the register about SPI interrupt , check whether the interrupt flag set ?

whether enable the interrupt ?

- Under KSDK 1.3 , there is one SPI demo , i think you can refer to :

KSDK_1.3.0\rtos\mqx\mqx\examples\dspi

Hope it helps

Alice

rhermes — Mon, 27 Jun 2016 21:54:55 GMT

Hi Alice,

Thank you for the response - sorry for taking so long to get back to you.

Switched to another project, but I'm back working on the SPI now.

The good news is that I have the interrupts working now.

Turns out I needed to set the interrupt handler using the MQX _int_install_isr() function since I am using MQX. duh!

Now I have a new problem.

In my initialization code I read the ID information from a flash chip that is on the SPI bus.

If I run at full speed I get a task error MQX_UNHANDLED_INTERRUPT (0x0041)

Which is vector 65, the SPI2 interrupt vector.

In addition it appears the unhandled interrupt repeats indefinitely.

If I set a breakpoint at DSPI_DRV_MasterCompleteTransfer(), OSA_SemaPost(&dspiState->irqSync);

then run after the breakpoint the SPI read completes properly and I don't get the task error.

If I remove the breakpoint at DSPI_DRV_MasterCompleteTransfer(), OSA_SemaPost(&dspiState->irqSync) and

set a breakpoint at DSPI_DRV_MasterTransferBlocking(), if (syncStatus != kStatus_OSA_Success); just after the OSA_SemaWait call,

it never gets there but ends up in the unhandled interrupt looping state.

Any advice is appreciated.

I'm running on a MK22FX512AVLQ12, using SDK 1.3 and MQX that is included in the SDK.

Thank You

Randy