I2CCC26XX_HWAttrsV1 Struct Reference

I2CCC26XX Hardware attributes. More...

#include <I2CCC26XX.h>

Data Fields
I2CBaseAddrType	baseAddr
unsigned long	powerMngrId
int	intNum
uint8_t	intPriority
	I2C Peripheral's interrupt priority. More...
uint32_t	swiPriority
	I2C SWI priority. The higher the number, the higher the priority. The minimum is 0 and the maximum is 15 by default. The maximum can be reduced to save RAM by adding or modifying Swi.numPriorities in the kernel configuration file. More...
uint8_t	sdaPin
uint8_t	sclPin

Detailed Description

I2CCC26XX Hardware attributes.

These fields, with the exception of intPriority, are used by driverlib APIs and therefore must be populated by driverlib macro definitions. For cc26xxware these definitions are found in:

• inc/hw_memmap.h
• inc/hw_ints.h

intPriority is the I2C peripheral's interrupt priority, 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.

A sample structure is shown below:

const I2CCC26XX_HWAttrsV1 i2cCC26XXHWAttrs[] = {
    {
       .baseAddr = I2C0_BASE,
       .powerMngrId = PERIPH_I2C0,
       .intNum = INT_I2C,
       .intPriority = ~0,
       .swiPriority = 0,
       .sdaPin = Board_I2C_SDA,
       .sclPin = Board_I2C_SCL,
    },
};

Field Documentation

I2CBaseAddrType I2CCC26XX_HWAttrsV1::baseAddr

I2C Peripheral's base address

unsigned long I2CCC26XX_HWAttrsV1::powerMngrId

I2C Peripheral's power manager ID

int I2CCC26XX_HWAttrsV1::intNum

I2C Peripheral's interrupt vector

uint8_t I2CCC26XX_HWAttrsV1::intPriority

I2C Peripheral's interrupt priority.

The CC26xx uses three of the priority bits, meaning ~0 has the same effect as (7 << 5).

(7 << 5) will apply the lowest priority.

(1 << 5) will apply the highest priority.

Setting the priority to 0 is not supported by this driver.

HWI's with priority 0 ignore the HWI dispatcher to support zero-latency interrupts, thus invalidating the critical sections in this driver.

uint32_t I2CCC26XX_HWAttrsV1::swiPriority

I2C SWI priority. The higher the number, the higher the priority. The minimum is 0 and the maximum is 15 by default. The maximum can be reduced to save RAM by adding or modifying Swi.numPriorities in the kernel configuration file.

uint8_t I2CCC26XX_HWAttrsV1::sdaPin

I2C SDA pin mapping

uint8_t I2CCC26XX_HWAttrsV1::sclPin

I2C SCL pin mapping

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

• I2CCC26XX.h