UDMAMSP432_HWAttrs Struct Reference

UDMAMSP432 Hardware attributes. More...

#include <UDMAMSP432.h>

Data Fields
void *	controlBaseAddr
UDMAMSP432_ErrorFxn	dmaErrorFxn
uint8_t	intNum
uint8_t	intPriority

Detailed Description

UDMAMSP432 Hardware attributes.

This structure contains the base address of the uDMA control table, and uDMA error interrupt attributes.

The control table is used by the uDMA controller to store channel control structures. The control table can be located anywhere in system memory, but must be contiguous and aligned on a 1024-byte boundary.

dmaErrorFxn is the uDMA peripheral's error interrupt handler.

intPriority is priority of the uDMA peripheral's error interrupt, as defined by the underlying OS. It is passed unmodified to the underlying OS's interrupt handler creation code, so you need to refer to the OS documentation for usage. For example, for SYS/BIOS applications, refer to the ti.sysbios.family.arm.m3.Hwi documentation for SYS/BIOS usage of interrupt priorities. If the driver uses the ti.drivers.ports interface instead of making OS calls directly, then the HwiP port handles the interrupt priority in an OS specific way. In the case of the SYS/BIOS port, intPriority is passed unmodified to Hwi_create().

A sample structure is shown below:

#include <driverlib/udma.h>

#if defined(__TI_COMPILER_VERSION__)
#pragma DATA_ALIGN(dmaControlTable, 1024)
#elif defined(__IAR_SYSTEMS_ICC__)
#pragma data_alignment=1024
#elif defined(__GNUC__)
__attribute__ ((aligned (1024)))
#endif

static tDMAControlTable dmaControlTable[64];

#include <ti/drivers/dma/UDMAMSP432.h>

UDMAMSP432_Object udmaMSP432Object;

const UDMAMSP432_HWAttrs udmaMSP432HWAttrs = {
        .controlBaseAddr = (void *)dmaControlTable,
        .dmaErrorFxn = UDMAMSP432_errorFxn,
        .intNum = INT_UDMAERR,
        .intPriority = (~0)
};

Field Documentation

void* UDMAMSP432_HWAttrs::controlBaseAddr

uDMA control registers base address

UDMAMSP432_ErrorFxn UDMAMSP432_HWAttrs::dmaErrorFxn

uDMA error interrupt handler

uint8_t UDMAMSP432_HWAttrs::intNum

uDMA error interrupt number

uint8_t UDMAMSP432_HWAttrs::intPriority

uDMA error interrupt priority.

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The documentation for this struct was generated from the following file:

• UDMAMSP432.h