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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATtiny88 датащи(PDF) 118 Page - ATMEL Corporation |
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ATtiny88 датащи(HTML) 118 Page - ATMEL Corporation |
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118 / 266 page  118 8008C–AVR–03/09 ATtiny48/88 Note: 1. See ”About Code Examples” on page 7. The following code examples show how to initialize the SPI as a Slave and how to perform a simple reception. Note: 1. See ”About Code Examples” on page 7. 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))) ; } Assembly Code Example (1) SPI_SlaveInit: ; Set MISO output, all others input ldi r17,(1<<DD_MISO) out DDR_SPI,r17 ; Enable SPI ldi r17,(1<<SPE) out SPCR,r17 ret SPI_SlaveReceive: ; Wait for reception complete sbis SPSR,SPIF rjmp SPI_SlaveReceive ; Read received data and return in r16,SPDR ret |
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