Mikroelektronika MIKROE-350 Fiche De Données

The following example demonstrates MMC library test. Upon flashing, insert a
MMC/SD card into the module, when you should receive the "Init-OK" message.
Then, you can experiment with MMC read and write functions, and observe the
results through the Usart Terminal.

' if defined, we have a debug messages on PC terminal
program MMC_Test

{$DEFINE RS232_debug}

dim MMC_chip_select as sbit at PORTB.B2
dim MMC_chip_select_direction as sbit at DDRB.B2

' universal variables
dim

k, i 

as word ' universal for loops and other stuff

' Variables for MMC routines

dData 

as byte[512]  ' Buffer for MMC sector reading/writing

data_for_registers 

as byte[16] ' buffer for CID and CSD registers

' Display byte in hex
sub procedure printhex(dim i as byte)
dim bHi, bLo as byte

bHi = i 

and 0xF0               ' High nibble

bHi = bHi >> 4
bHi = bHi + "0"
if (bHi>"9") then

bHi = bHi + 7

end if
bLo = (i 

and 0x0F) + "0"       ' Low nibble

if (bLo>"9") then

bLo = bLo+7

end if
UART1_Write(bHi)

UART1_Write(bLo)

main:

DDRC = 255

PORTC = 0

{$IFDEF RS232_debug}

UART1_Init(19200)

{$ENDIF}

Delay_ms(10)

DDRA = 255

PORTA = 1

273

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6