Форум РадиоКот

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#define F_CPU 20000000
#include <avr/io.h>
#include <util/delay.h>
#define BAUD 129
//BAUD ((F_CPU/(USART_SPEED*16)) - 1)     : ( 20 000 000 / (9600*16) ) - 1 = 129

inline void USART_Init( unsigned int baud ){
/* Устанавливаем скорость */
UBRRH = (unsigned char)(baud>>8);
UBRRL = (unsigned char)baud;
/* Включаем прием и передачу */
UCSRB = (1<<RXEN)|(1<<TXEN);
/* Устанавливаем формат: 8n1 */
UCSRC = ( 0 << UCSZ2 ) | ( 1 << UCSZ1 ) | ( 1 << UCSZ0 ) | ( 0 << UPM1 ) | ( 0 << UPM0 ) | (0 << USBS);
}

int main(void){
    USART_Init(BAUD);
        _delay_ms(1000);
        UDR = 0x43;
    while(1){}

    return 0;
}

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43 43 43 43 43 43 43 43 83 43 A1 A3 CB 43 43 43 FE 43 43 43 85 43 43 43 94 43 43 43 E3 A3 83 43 43 C3 43 BE 43 43 43 C3 43 43 43 43 FF 43 43 43 A3 A3 43 A3 43 43 C3 43 A3 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43

Код: Выделить всё

PUB start_explicit( DO, CLK, DI, CS ) : card_type | tmp, i
{{
  Do all of the card initialization in SPIN, then hand off the pin
  information to the assembly cog for hot SPI block R/W action!
}}

  ' (start with cog variables, _BEFORE_ loading the cog)
  pinDO := DO
  maskDO := |< DO
  pinCLK := CLK
  pinDI := DI
  maskDI := |< DI
  maskCS := |< CS
  adrShift := 9 ' block = 512 * index, and 512 = 1<<9
  ' pass the output pin mask via the command register
  maskAll := maskCS | (|<pinCLK) | maskDI
  dira |= maskAll  
  ' get the card in a ready state: set DI and CS high, send => 74 clocks
  outa |= maskAll
  repeat 4096
    outa[CLK]~~
    outa[CLK]~
  ' time-hack
  SPI_block_index := cnt
  ' reset the card
  tmp~
  repeat i from 0 to 9
    if tmp <> 1
      tmp := send_cmd_slow( CMD0, 0, $95 )
      if (tmp & 4)
        ' the card said CMD0 ("go idle") was invalid, so we're possibly stuck in read or write mode
        if i & 1
          ' exit multiblock read mode
          repeat 4
            read_32_slow        ' these extra clocks are required for some MMC cards
          send_slow( $FD, 8 )   ' stop token
          read_32_slow
          repeat while read_slow <> $FF
        else
          ' exit multiblock read mode
          send_cmd_slow( CMD12, 0, $61 )
  
  if tmp <> 1
    ' the reset command failed!
    crash( ERR_CARD_NOT_RESET )

Код: Выделить всё

sendSD
                        mov circle, #8          '8 bits
                        
                                                'sending cirlce
send_loop               mov     calc, sndByte
                        and     calc, #$80
                        cmp     calc, #0        wz      
                        
                        or      outa, mosi
              if_z      andn    outa, mosi
               
              
                        or      outa, clock
                        shl     sndByte, #1
                        andn    outa, clock

                        
                        cmpsub  circle, #1      wz, wr
                        if_nz   jmp #send_loop
                        shr     sndByte, #8 
sendSD_ret              ret

Код: Выделить всё

               or      dira, pins_out         'set pins on out    
                        or      outa, pins_st          'set 1 on start out pins

                        mov     sym, #100               '100 cyclres by 8 bit
                         
                                                            ''initializing SD in SPI   
clk_loop            mov     sndByte, #$FF

                        call    #sendSD   

                        cmpsub  sym, #1         wr, wz
              if_nz     jmp     #clk_loop

                        andn    outa, cs1             'set NS to 0
                        andn    outa, cs2 

                        mov     sndByte, #$40
                        call    #sendSD
                        mov     sndByte, #$00
                        call    #sendSD
                        call    #sendSD
                        call    #sendSD  
                        call    #sendSD
                        mov     sndByte, #$95
                        call    #sendSD