EFM32 Happy Gecko Software Documentation  efm32hg-doc-5.1.2
microsd.c File Reference

Detailed Description

Micro SD card driver for the EFM32GG_DK3750 development kit. This file provides the interface layer between the DK and the fat filesystem provided.

Version
5.1.1

License

Copyright 2015 Silicon Labs, Inc. http://www.silabs.com

This file is licensed under the Silabs License Agreement. See the file "Silabs_License_Agreement.txt" for details. Before using this software for any purpose, you must agree to the terms of that agreement.

Definition in file microsd.c.

#include "diskio.h"
#include "microsd.h"
#include "em_cmu.h"
#include "em_usart.h"

Go to the source code of this file.

Functions

int MICROSD_BlockRx (uint8_t *buff, uint32_t btr)
 Receive a data block from micro SD card. More...
 
int MICROSD_BlockTx (const uint8_t *buff, uint8_t token)
 Send a data block to micro SD card. More...
 
void MICROSD_Deinit (void)
 Deinitialize SPI peripheral. Turn off the SPI peripheral and disable SPI GPIO pins.
 
void MICROSD_Deselect (void)
 Deselect the micro SD card and release the SPI bus.
 
void MICROSD_Init (void)
 Initialize the SPI peripheral for microSD card usage. SPI pins and speed etc. is defined in microsdconfig.h.
 
void MICROSD_PowerOff (void)
 Turn off micro SD card power. DK doesn't support socket power control, only disable the SPI clock.
 
void MICROSD_PowerOn (void)
 Turn on micro SD card power. DK doesn't support socket power control, only enable the SPI clock.
 
int MICROSD_Select (void)
 Select the micro SD card and wait for the card to become ready. More...
 
uint8_t MICROSD_SendCmd (uint8_t cmd, DWORD arg)
 Send a command packet to micro SD card. More...
 
void MICROSD_SpiClkFast (void)
 Set SPI clock to maximum frequency.
 
void MICROSD_SpiClkSlow (void)
 Set SPI clock to a low frequency suitable for initial card initialization.
 
bool MICROSD_TimeOutElapsed (void)
 Check if timeout value set with MICROSD_TimeOutSet() has elapsed. More...
 
void MICROSD_TimeOutSet (uint32_t msec)
 Set a timeout value. The timeout value will be decremented towards zero when SPI traffic to/from the micro SD card takes place. Use MICROSD_TimeOutElapsed() to check if timeout has elapsed. More...
 
uint8_t MICROSD_XferSpi (uint8_t data)
 Do one SPI transfer. More...