Hi, every one, how can I use a gpio input as a dma trigger source with QN9080 IC.
Environment: Hardware: QN908x-DK board; Software: SDK_2.2.0_QN908XCDK
From the QN908x user mannual. I found that:
The DMA can use trigger input multiplexing to sequence DMA transactions without the
use of interrupt service routines
and in my code, I set the DMA and pinmux as fallows:
#define PININT0_DMA_CHANNEL 0
DMA_CreateHandle(&g_DMA_Handle, DMA0, PININT0_DMA_CHANNEL);
DMA_SetCallback(&g_DMA_Handle, DMA_Callback, NULL);
trigger.burst = kDMA_SingleTransfer;
trigger.type = kDMA_RisingEdgeTrigger;
trigger.wrap = kDMA_NoWrap;
DMA_ConfigureChannelTrigger(DMA0, PININT0_DMA_CHANNEL, &trigger);
DMA_PrepareTransfer(&transferConfig, (uint32_t*)&(GPIOA->DATA), pBuf, 1,
0x10, kDMA_PeripheralToMemory, NULL);
/* Connect trigger sources to PINT */
INPUTMUX_AttachSignal(INPUTMUX, kPINT_PinInt0, kINPUTMUX_GpioPort0Pin26ToPintsel);
INPUTMUX_AttachSignal(INPUTMUX, kPINT_PinInt0, kINPUTMUX_PinInt0ToDma);
/* Initialize PINT */
/* Setup Pin Interrupt 0 for rising edge */
PINT_PinInterruptConfig(PINT, kPINT_PinInt0, kPINT_PinIntEnableRiseEdge, pint_intr_callback);
But the code can never go into DMA_Callback function, if I add the code as fallowed:
to enable the gpio interrupt, the code can jump into the pint_intr_callback function rightly;That meas there has request signal in this pin.
So that I'm wonder if my set of dma and pinmux is right or not, and how can I set them so that the dma can work ok.
Hope to get your help as quickly as possible.
Thanks a lot.