Please, tell me, how to solve the problem:
I wanted to create a component which only uses DMA (without the program).

I read counter register and record it in the  register of timer.
BUT!    I shall be obliged in the program perform such an operation:
counter_status = Multi_Pulse_1_Counter_ReadStatusRegister ();

Question:     how not to do it.

The project is attached below.

That should work with capturing. Every captured value goes into the FIFO from which DMA reads.

So without CPU intervention you'll need a signal that captures the data which in turn will generate an interrupt on capture which starts a DMA request.

Bob

Thanks Bob, but I yet didn't understand.  This project works.

To me it is not clear: why capture register ('$INSTANCE_NAME' _Counter_STATICCOUNT_LSB_PTR for DMA) are updated only after Counter_ReadStatusRegister () will be executed.

You were talking about a timer, not a PWM and you were asking for something that would work without CPU-usage.

So I thought you were asking for an extension to your project. The FIFO is acted on a capture in a timer module or by software but I think there was something mentioned in the datasheet not to use a counter_Read() when using DMA.

So, what exactly do you want to perform/improve?

Bob

I'm trying to create by the hardware component which only uses DMA (no ISR no program)
I was not able to achieve this goal:
Line 40 is not sending data until the Counter Status Register will not be read by software:
Multi_Pulse.c
. . . . . . . . . . . . . . .
40    CyDmaTdSetAddress(   `$INSTANCE_NAME`_DMA_TD[0],     LO16((uint32)`$INSTANCE_NAME`_Counter_STATICCOUNT_LSB_PTR),      LO16((uint32)`$INSTANCE_NAME`_Timer_1_PERIOD_LSB_PTR));
. . . . . . . . . . . . . . .
I was compelled to create for (;;) in main.c
containing:    counter_status = Multi_Pulse_1_Counter_ReadStatusRegister();
My question is:  how to make the DMA sends the data without using the programm appeal to the Counter Status Register  (with empty   for (;;)  ).

I brushed my project. Now it doesn't work :).
Is it possible to make it work, without the participation of the CPU.

I do not have the time to test, but try

use a second TD which is executed automatically (Auto Next) after the first, transfering 1 byte source is

to a memory location. This should clear the Interrupt bit.

Counter_STATUS_PTR

The forum software mangled the lines of the post. Source is Counter_STATUS_PTR

That's the (pointer to the) register you read to clear the interrupt.

Bob

Thank You Bob. I think I did it. I'll check again.

I did this:
uint8 DMA_1_Chan;
uint8 DMA_1_TD[1];
uint8 counter_REG = 0;
DMA_1_Chan = DMA_1_DmaInitialize (1, 0,  HI16(CYDEV_PERIPH_BASE), HI16(counter_REG));
DMA_1_TD[0] = CyDmaTdAllocate();
CyDmaTdSetConfiguration(DMA_1_TD[0], 1, DMA_1_TD[0], TD_AUTO_EXEC_NEXT);
CyDmaTdSetAddress(DMA_1_TD[0], LO16((uint32) Counter_STATUS_PTR), LO16((uint32)counter_REG));
CyDmaChSetInitialTd(DMA_1_Chan, DMA_1_TD[0]);
CyDmaChEnable(DMA_1_Chan, 1);

Unfortunately it does not work
 

Problem solved:

I disabled all of interruption of the timer
Left only Advanced -- > Reload Counter = On Capture
Configure - > Compare Value =0
Thanks for the tip about the interruption.

Congratulations!

And thank you to share your experiences and the code with us.

Bob