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49 lines
664 B
49 lines
664 B
8 years ago
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/* I2C Echo Example */
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#include "../I2CSlave/I2CSlave.h"
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#define I2C_ADDR 0x20
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volatile uint8_t data;
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volatile uint8_t final;
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void I2C_received(uint8_t received_data)
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{
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data = received_data;
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}
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void I2C_requested()
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{
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I2C_transmitByte(data);
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}
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void I2C_challenge() {
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I2C_transmitByte(data*3);
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}
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void setup()
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{
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// set received/requested callbacks
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I2C_setCallbacks(I2C_received, I2C_requested);
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// init I2C
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I2C_init(I2C_ADDR);
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// init output gpio
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DDRB = 0b00000001;
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}
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int main()
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{
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setup();
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// Main program loop
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while(1) {
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if(data != 4) {
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I2C_challenge();
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}
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else {
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//PORTB |= 1<<1;
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data = 2;
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I2C_requested();
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}
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}
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}
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