I2S Hardware attributes. More...

#include <I2SWFF3.h>

Collaboration diagram for I2SWFF3_HWAttrs:

Data Fields
I2SWFF3_ClkSrc	clkSrc

I2SWFF3_ADFS	adfs

uint32_t	audioClkFreq

uint_least8_t	sd1Pin

uint_least8_t	sd1PinMux

uint_least8_t	sd0Pin

uint_least8_t	sd0PinMux

uint_least8_t	sckPin

uint_least8_t	sckPinMux

uint_least8_t	cclkPin

uint_least8_t	cclkPinMux

uint_least8_t	wsPin

uint_least8_t	wsPinMux

uint8_t	intPriority

Detailed Description

I2S Hardware attributes.

intPriority is the I2S peripheral's interrupt priority, as defined by the RTOS kernel. This value is passed unmodified to HwiP_construct().

A sample structure is shown below:

const I2SWFF3_HWAttrs i2sHWAttrs[CONFIG_TI_DRIVERS_I2S_COUNT] = {
    {
       .clkSrc       =  I2SWFF3_CLK_SRC_SOC_PLL_CLK, // 160 MHz
       .adfs         = {.tref      = 100000,         // ((1THz)/160MHz)*16 = 6250*16 = 100000
                        .div       = 13,             // div_temp1 = floor(160MHz/12.288MHz) = 13
                                                     // div_temp2 = ceil(160MHz/12.288MHz) = 14
                                                     // delta_temp1 = (1THz)*(1/(12.288MHz*13))-(1/160MHz) = -437
                                                     // delta_temp2 = (1THz)*(1/(12.288MHz*14))-(1/160MHz) = 10
                                                     // abs(delta_temp2) < abs (delta_temp1)
                        .delta     = 160,            // delta_temp2*16 = 160
                        .deltaSign = 0,},            // delta_temp2 is positive
       .audioClkFreq =  12288031,                    // (1THz)/((((1THz)/160MHz)+(160/16))*13) = 12288031
       .sd1Pin       =  CONFIG_I2S_ADI,
       .sd1PinMux    =  7,
       .sd0Pin       =  CONFIG_I2S_ADO,
       .sd0PinMux    =  7,
       .sckPin       =  CONFIG_I2S_BCLK,
       .sckPinMux    =  7,
       .cclkPin      =  CONFIG_I2S_CCLK,
       .cclkPinMux   =  8,
       .wsPin        =  CONFIG_I2S_WCLK,
       .wsPinMux     =  7,
       .intPriority  =  ~0,
    },
};

Field Documentation

§ clkSrc

I2SWFF3_ClkSrc I2SWFF3_HWAttrs::clkSrc

I2S clock source.

§ adfs

I2SWFF3_ADFS I2SWFF3_HWAttrs::adfs

ADFS configuration.

§ audioClkFreq

uint32_t I2SWFF3_HWAttrs::audioClkFreq

Audio clock (ACLK) frequency. This is the output of ADFS, so it must match clkSrc and the adfs configuration.

§ sd1Pin

uint_least8_t I2SWFF3_HWAttrs::sd1Pin

Pin used for SD1 signal.

§ sd1PinMux

uint_least8_t I2SWFF3_HWAttrs::sd1PinMux

Mux value used to mux the SD1 signal to sd1Pin.

§ sd0Pin

uint_least8_t I2SWFF3_HWAttrs::sd0Pin

Pin used for SD0 signal.

§ sd0PinMux

uint_least8_t I2SWFF3_HWAttrs::sd0PinMux

Mux value used to mux the SD0 signal to sd0Pin.

§ sckPin

uint_least8_t I2SWFF3_HWAttrs::sckPin

Pin used for SCLK signal.

§ sckPinMux

uint_least8_t I2SWFF3_HWAttrs::sckPinMux

Mux value used to mux the SCLK signal to sckPin.

§ cclkPin

uint_least8_t I2SWFF3_HWAttrs::cclkPin

Pin used for CCLK signal. Not used in most of the applications.

§ cclkPinMux

uint_least8_t I2SWFF3_HWAttrs::cclkPinMux

Mux value used to mux the CCLK signal to cclkPin.

§ wsPin

uint_least8_t I2SWFF3_HWAttrs::wsPin

Pin used for WS signal.

§ wsPinMux

uint_least8_t I2SWFF3_HWAttrs::wsPinMux

Mux value used to mux the WS signal to wsPin.

§ intPriority

uint8_t I2SWFF3_HWAttrs::intPriority

I2S Peripheral's interrupt priority.

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

I2SWFF3.h

Data Fields