MSP432P411V: how can i test whether my DMA ping pong mode is working correctly or not by using MSP432 Launch Pad

Hi maniram,

You can examine the buffer contents with an SPI loopback configuration.

With respective the TIRTOS, you only need use the TI Drivers for DMA. There are ping-pong mode APIs.

Please see TI Drivers documents:https://dev.ti.com/tirex/explore/node?node=AB5W0nkusWo2BXUVd-F0Fw__z-lQYNj__LATEST

Hi Winter Yu,

Thank you for the inputs.

From the above given API's it is clear that we can configure the DMA Ping Pong Method.

But after referring the driver it is observed that, before calling this API UDMAMSP432_setupPingPongTransfer(), there is Pre-condition given:

as per the above given image the UDMAMSP432_open() call should also be called and parameters need to be initialized:

here when i am using the API call in the code, the point where i am getting stuck is at the Hardware interrupt parameter:

how can i initialize this parameter?

whether i can use the UDMAMSP432_setupPingPongTransfer() directly without calling UDMAMSP432_open()?

if no, can u please confirm on this flow on implementing the ping pong API:

UDMAMSP432_init()

UDMAMSP432_open()

UDMAMSP432_setupPingPongTransfer()?

whether this driver can be used to test on the example project code "dma_array_transfer_software_trigger_MSP_EXP432P4111_nortos_ccs"?

if there is any reference code please share using this driver API's?

Thank you,

Maniram

Hello,

Yes, the UDMAMSP432_init() and UDMAMSP432_open() has to be called first. You should follow the below flow

UDMAMSP432_init()

UDMAMSP432_open()

UDMAMSP432_setupPingPongTransfer()

"here when i am using the API call in the code, the point where i am getting stuck is at the Hardware interrupt parameter"

 Which parameter?

The above driver can only be used in RTOS project, not nortos project.

Hi Winter Yu,

Thanks for the reply, with regards your query, please find the below answer inline:

"here when i am using the API call in the code, the point where i am getting stuck is at the Hardware interrupt parameter"

 Which parameter?

In the given below the DMA API call, the parameter highlighted with Bold is where i am stuck:

UDMAMSP432_Handle UDMAMSP432_open(uint32_t channel, uint8_t intNum, uint32_t priority,
void (*hwiFxn)(uintptr_t), uintptr_t arg)

how can i initialize this parameter?

Thank you,

Maniram