SDSPICC3200_HWAttrs Struct Reference

SDSPICC3200 Hardware attributes. More...

#include <SDSPICC3200.h>

Data Fields
uint32_t	baseAddr
uint32_t	spiPRCM
uint32_t	csGPIOBase
uint32_t	csGPIOPin
uint32_t	txGPIOBase
uint32_t	txGPIOPin
uint32_t	txGPIOMode
uint32_t	txSPIMode
uint32_t	txPackPin

Detailed Description

SDSPICC3200 Hardware attributes.

The SDSPICC3200 configuration structure describes to the SDSPICC3200 driver implementation hardware specifies on which SPI peripheral, GPIO Pins and Ports are to be used.

The SDSPICC3200 driver uses this information to:

• configure and reconfigure specific ports/pins to initialize the SD Card for SPI mode
• identify which SPI peripheral is used for data communications
• identify which GPIO port and pin is used for the SPI chip select mechanism
• identify which GPIO port and pin is concurrently located on the SPI's MOSI (TX) pin.

Remarks

To initialize the SD Card into SPI mode, the SDSPI driver changes the SPI's MOSI pin into a GPIO pin so it can kept driven HIGH while the SPI SCK pin can toggle. After the initialization, the TX pin is reverted back to the SPI MOSI mode.

These fields are used by driverlib APIs and therefore must be populated by driverlib macro definitions. For CCWare these definitions are found in:

• inc/hw_memmap.h
• inc/hw_ints.h
• driverlib/gpio.h
• driverlib/pin.h
• driverlib/prcm.h

An example configuration structure could look as the following:

const SDSPICC3200_HWAttrs sdspiCC3200HWattrs = {
    {
          .baseAddr = GSPI_BASE,     // SSI Peripheral's base address
          .spiPRCM = PRCM_GSPI,      // SPI PRCM peripheral number

          .csGPIOBase = GPIOA0_BASE, // CS GPIO base
          .csGPIOPin = GPIO_PIN_7,   // CS GPIO pin number

          .txGPIOBase = GPIOA2_BASE, // GPIO base addr when using MOSI as GPIO
          .txGPIOPin = GPIO_PIN_0,   // GPIO pin number when using MOSI as GPIO
          .txGPIOMode = PIN_MODE_0,  // GPIO pin mode to use MOSI as GPIO
          .txSPIMode = PIN_MODE_7,   // Pin mode to use MOSI
          .txPackPin = PIN_07,       // Package pin number
    }
};

Field Documentation

uint32_t SDSPICC3200_HWAttrs::baseAddr

< SPI Peripheral base address

uint32_t SDSPICC3200_HWAttrs::spiPRCM

SPI PRCM peripheral number CS GPIO base

uint32_t SDSPICC3200_HWAttrs::csGPIOBase

CS GPIO pin number

uint32_t SDSPICC3200_HWAttrs::csGPIOPin

GPIO base addr when using MOSI as GPIO

uint32_t SDSPICC3200_HWAttrs::txGPIOBase

GPIO pin number when using MOSI as GPIO

uint32_t SDSPICC3200_HWAttrs::txGPIOPin

GPIO pin mode to use MOSI as GPIO

uint32_t SDSPICC3200_HWAttrs::txGPIOMode

Pin mode to use MOSI

uint32_t SDSPICC3200_HWAttrs::txSPIMode

Package pin number

uint32_t SDSPICC3200_HWAttrs::txPackPin

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

• SDSPICC3200.h