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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATmega16 датащи(PDF) 138 Page - ATMEL Corporation |
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ATmega16 датащи(HTML) 138 Page - ATMEL Corporation |
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138 / 357 page  138 2466S–AVR–05/09 ATmega16(L) Note: 1. See “About Code Examples” on page 7. Assembly Code Example (1) SPI_MasterInit: ; Set MOSI and SCK output, all others input ldi r17,(1<<DD_MOSI)|(1<<DD_SCK) out DDR_SPI,r17 ; Enable SPI, Master, set clock rate fck/16 ldi r17,(1<<SPE)|(1<<MSTR)|(1<<SPR0) out SPCR,r17 ret SPI_MasterTransmit: ; Start transmission of data (r16) out SPDR,r16 Wait_Transmit: ; Wait for transmission complete sbis SPSR,SPIF rjmp Wait_Transmit ret C Code Example(1) void SPI_MasterInit(void) { /* Set MOSI and SCK output, all others input */ DDR_SPI = (1<<DD_MOSI)|(1<<DD_SCK); /* Enable SPI, Master, set clock rate fck/16 */ SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR0); } void SPI_MasterTransmit(char cData) { /* Start transmission */ SPDR = cData; /* Wait for transmission complete */ while (!(SPSR & (1<<SPIF))) ; } |
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