Mikroelektronika MIKROE-724 データシート

mikroBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

391

Mmc_Init

sub function Mmc_Init() as word

Description Initializes MMC through hardware SPI interface.

Mmc_Init needs to be called before using other functions of this library.

Parameters None.
Returns

- 

0

 - if MMC/SD card was detected and successfully initialized 

- 

1

 - otherwise 

The appropriate hardware SPI module must be previously initialized.

Global variables: 

- 

Mmc_Chip_Select

: Chip Select line 

- 

Mmc_Chip_Select_Direction

: Direction of the Chip Select pin 

must be defined before using this function. 

 

dim Mmc_Chip_Select as sbit at LATF0_bit   ‘ for writing to output pin always 

dim Mmc_Chip_Select_Direction as sbit at TRISF0_bit

dim error as byte

...

SPI1_Init_Advanced(_SPI_MASTER,  _SPI_8_BIT,  _SPI_PRESCALE_SEC_1,  _SPI_

PRESCALE_PRI_64,_SPI_SS_DISABLE,  _SPI_DATA_SAMPLE_MIDDLE,  _SPI_CLK_IDLE_

HIGH, _SPI_ACTIVE_2_IDLE)

Mmc_Init()

‘ Reinitialize the SPI module at higher speed (change primary prescaler).

SPI1_Init_Advanced(_SPI_MASTER,  _SPI_8_BIT,  _SPI_PRESCALE_SEC_1,  _SPI_

PRESCALE_PRI_4,_SPI_SS_DISABLE,  _SPI_DATA_SAMPLE_MIDDLE,  _SPI_CLK_IDLE_

HIGH, _SPI_ACTIVE_2_IDLE)

None.