MSP-EXP432P401R: MSP432P401R

Malcolm Mcdowell

Part Number: MSP-EXP432P401R

I am using the above processor to DMA SPI data.

What I would like to know is how can I determine when the DMA is compete. Is there a flag that can be read?

I am using the adcbuffdifferential_EXP432P401R_tirtos_css example. I was thinking of using the DMA interrupt, but I do not see an interrupt vector table with the DMA entry.

Can you provide information showing how to assign an interrupt or a flag that can be read to determine when the transfer is complete?

Thanks for you help.

Malcolm

over 4 years ago

0 Eason Zhou over 4 years ago

TI__Mastermind 39675 points

Hope this example can give you some help:

dev.ti.com/.../node

0 Malcolm Mcdowell over 4 years ago in reply to Eason Zhou

Intellectual 570 points

Hi Eason,

That examples works and is based on running an application with no rtos. I have tried this.

The version of code I am using uses tirtos. I started with the tirtos as I was using a ADC example. I cannot get the interrupt to work on tirtos, nor can I see a vector table in tirtos.

Do you have an example of the interrupt or reading a flag to show that the DMA is complete using tirtos?

Malcolm

0 Eason Zhou over 4 years ago in reply to Malcolm Mcdowell

TI__Mastermind 39675 points

Sorry, I don't have such an example. Please check if this register can help you:

0 Malcolm Mcdowell over 4 years ago in reply to Eason Zhou

Intellectual 570 points

Hi Eason,

Sorry for the delay getting back to you.

The application that I am developing uses the BIOS_start(). It appears that I have use Hwi_create.

Can you tell me how to setup DMA/SPI interrupt functionality using the Hwi?

Malcolm

0 Eason Zhou over 4 years ago in reply to Malcolm Mcdowell

TI__Mastermind 39675 points

Hope this thread can give you some help: https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/906187/msp432p411v-configuring-the-dma-channel-and-interrupt-using-the-ti-rtos/3350199?tisearch=e2e-sitesearch&keymatch=RTOS%2520DMA#3350199

0 Malcolm Mcdowell over 4 years ago in reply to Eason Zhou

Intellectual 570 points

Hi Eason,

No. This doesn't help. I just see a data structure. I have seen similar examples of the data structure, but no documentation and no examples that I could find. When I tried to include the data structure, I couldn't get the code to compile.

I need to get a solution to this ASAP. I cannot get an DMA/SPI ":compete notification" whether its an interrupt or a flag that can be read. All of my attempts have failed.

Do you have an example of MAP_DMA_registerInterrupt(); When I try this my devices resets. Can this function be called from tirtos?

Thanks

Malcolm

0 Eason Zhou over 4 years ago in reply to Malcolm Mcdowell

TI__Mastermind 39675 points

Sorry, I don't have such an example for MSP432... For MSP432, we only have limited support...

Arm-based microcontrollers

Arm-based microcontrollers forum

MSP-EXP432P401R: MSP432P401R