I2C Hardware attributes. More...

#include <I2CMSPM0.h>

Data Fields
I2C_BASE_HWATTRS uint8_t	sdaPincm

uint8_t	sdaPinIndex

uint32_t	sdaPinMux

uint8_t	sclPincm

uint8_t	sclPinIndex

uint32_t	sclPinMux

DL_I2C_CLOCK	clockSource

DL_I2C_CLOCK_DIVIDE	clockDivider

DL_I2C_RX_FIFO_LEVEL	rxIntFifoThr

DL_I2C_TX_FIFO_LEVEL	txIntFifoThr

bool	isClockStretchingEnabled

uint16_t	i2cClk

Detailed Description

I2C Hardware attributes.

The i2c and intNum fields define the base address and the interrupt number of the I2C peripheral. These values are passed to driverlib APIs and therefore must be populated by driverlib macro definitions.

The powerMngrId is the Power driver resource ID for the I2C peripheral. These macros are defined in PowerMSP.h

intPriority is the I2C peripheral's interrupt priority, This value is passed unmodified to Hwi_create().

sdaPinMux and sclPinMux are values drawn from the GPIO driver. They indicate the function for that specific IO pin that select I2C mode.

A sample structure is shown below:

const I2CMSPM0_HWAttrs I2CHWAttrs[CONFIG_I2C_COUNT] = {
    {
        .i2c                      = I2C_INST,
        .intNum                   = I2C_INST_INT_IRQN,
        .intPriority              = (~0),
        .sdaPin                   = GPIO_I2C_IOMUX_SDA,
        .sdaPinIndex              = GPIO_I2C_SDA_PIN,
        .sdaPinMux                = GPIO_I2C_IOMUX_SDA_FUNC,
        .sclPin                   = GPIO_I2C_IOMUX_SCL,
        .sclPinIndex              = GPIO_I2C_SCL_PIN,
        .sclPinMux                = GPIO_I2C_IOMUX_SCL_FUNC,
        .clockSource              = DL_I2C_CLOCK_BUSCLK,
        .clockDivider             = DL_I2C_CLOCK_DIVIDE_1,
        .txIntFifoThr             = DL_I2C_TX_FIFO_LEVEL_BYTES_1,
        .rxIntFifoThr             = DL_I2C_RX_FIFO_LEVEL_BYTES_1,
        .isClockStretchingEnabled = true,
        .i2cClk                   = I2C_CLOCK_MHZ,
    },
};

Field Documentation

§ sdaPincm

I2C_BASE_HWATTRS uint8_t I2CMSPM0_HWAttrs::sdaPincm

< I2C base hardware attributes SDA Pincm value

§ sdaPinIndex

uint8_t I2CMSPM0_HWAttrs::sdaPinIndex

SDA pin index

§ sdaPinMux

uint32_t I2CMSPM0_HWAttrs::sdaPinMux

SDA pin function

§ sclPincm

uint8_t I2CMSPM0_HWAttrs::sclPincm

SCL Pincm value

§ sclPinIndex

uint8_t I2CMSPM0_HWAttrs::sclPinIndex

SCL pin index

§ sclPinMux

uint32_t I2CMSPM0_HWAttrs::sclPinMux

SCL pin function

§ clockSource

DL_I2C_CLOCK I2CMSPM0_HWAttrs::clockSource

I2C clock source

§ clockDivider

DL_I2C_CLOCK_DIVIDE I2CMSPM0_HWAttrs::clockDivider

I2C clock divider to get the required bps

§ rxIntFifoThr

DL_I2C_RX_FIFO_LEVEL I2CMSPM0_HWAttrs::rxIntFifoThr

I2C receive FIFO interrupt threshold

§ txIntFifoThr

DL_I2C_TX_FIFO_LEVEL I2CMSPM0_HWAttrs::txIntFifoThr

I2C transmit FIFO interrupt threshold

§ isClockStretchingEnabled

bool I2CMSPM0_HWAttrs::isClockStretchingEnabled

Clock stretching enable/disable flag

§ i2cClk

uint16_t I2CMSPM0_HWAttrs::i2cClk

The clock must be in MHz

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

I2CMSPM0.h

Data Fields