HRTIM burst DMA

[JRyu.1]

Hi,

I am trying to figure out to make HRTIM burst DMA working. I want to update timer period, compare1, compare2, and compare 3 registers by using burst DMA. There is not much information about this. There are two postings in the community posted several years ago, and it gave me some idea. But I need to have more information.

• I used CubeMx to configure and generate code.
• I want to trigger the burst DMA by software.
• Assuming that the DMA source buffer data order matches to the order of number of registers to update, for there is no description stated in the reference manual.
• Nothing happens when I run. It did not stop at burst DMA completion and DMA error callback function when I set breakpoints.

Below screenshots and code are used for the configuration.

 

I am not sure that I need to check on the "Increment Address" or not.

InvPerComp[0] = new_per; // new period
InvPerComp[1] = cmp1; // new compare 1
InvPerComp[2] = cmp2; // new compare 2
InvPerComp[3] = cmp3; // new compare 3
 
// Will this update the registers in order? 
HAL_HRTIM_BurstDMATransfer(hrtim, timer, (uint32_t)&InvPerComp[0], 4)

[MTall.3]

Did you find a solution to this problem? It would be interesting to know as I'm working on a similar problem.

[BKain.2]

Did you find a solution to this problem? I have a similar problem.

[Pierre_Paris]

Hello @JRyu.1 , @BKain.2 , @MTall.3 ,

Here some support and points that may help you :

• Can you confirm you use HAL_HRTIM_BurstDMAConfig() to configure HRTIM burst DMA timer x update register (HRTIM_BDTxUPR) ? Please share register values before and after executing this line.

• Which STM32 are you using ?
• Can you please share the HAL_HRTIM_MspInit() content ? Have you enable synchronization ? 

Best Regards,

Pierre

[liaifat85]

Confirm that the source buffer used for DMA holds the correct data in the correct order for updating the timer period, compare1, compare2, and compare3 registers.