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31 lines
484 B
31 lines
484 B
1 year ago
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#ifndef SOFTWARE_SPI_H_
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#define SOFTWARE_SPI_H_
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#include <inttypes.h>
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#include <util/delay.h>
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#include <avr/io.h>
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#define delay 2
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//PC0 = clock
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//PC1 = MOSI (output)
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//PC2 = MISO (input)
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//PC3-5 empty
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#define CLK_invert PORTC ^= (1<<PORTC0)
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#define MOSI_Hi PORTC |= (1<<PORTC1)
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#define MOSI_Lo PORTC &= ~(1<<PORTC1)
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void sSPI_init();
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void sSPI_select(uint8_t ch);
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void sSPI_free();
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void sSPI_write_byte(uint8_t byte);
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uint8_t sSPI_read_byte();
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#endif /* SOFTWARE_SPI_H_ */
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