70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
// need 0.1uf cap between vcc and ground for proper operation
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// need 10k pull up resistor on scl and sda for i2c to work correctly
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// Pin Mappings (Per TinyCore)
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// ATTiny Pin -- Arduino Pin
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// 01 17/PA2/RESET
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// 02 0/PD0/RXD
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// 03 1/PD1/TXD
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// 04 2/PA1/XTAL2
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// 05 3/PA0/XTAL1
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// 06 4/PD2/INT0
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// 07 5/PD3/INT1
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// 08 6/PD4
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// 09 7/PD5
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// 10 GND
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// 11 8/PD6
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// 12 9/PB0/PCINT0
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// 13 10/PB1/PCINT1
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// 14 11/PB2/PCINT2/OC0A
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// 15 12/PB3/PCINT3/OC1A
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// 16 13/PB4/PCINT4/OC1B
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// 17 14/PB5/PCINT5/MOSI/DI/SDA
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// 18 15/PB6/PCINT6/MISO/DO
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// 19 16/PB7/PCINT7/SCK/SCL
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// 20 VCC
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// i2c ATTiny Pins
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// sda: 17
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// scl: 19
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// DIP Switch ATTiny Pins
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// 2 - 9
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#define I2C_ADDRESS 0x96
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#include <Wire.h>
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void setup() {
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pinMode(0, INPUT);
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pinMode(1, INPUT);
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pinMode(2, INPUT);
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pinMode(3, INPUT);
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pinMode(4, INPUT);
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pinMode(5, INPUT);
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pinMode(6, INPUT);
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pinMode(7, INPUT);
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Wire.begin(I2C_ADDRESS);
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Wire.onRequest(requestEvent);
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}
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void loop() {
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delay(100);
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}
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// function that executes whenever data is requested by master
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// this function is registered as an event, see setup()
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byte dip_switch = 0b00000000;
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void requestEvent() {
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bitWrite(dip_switch, 0, digitalRead(0));
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bitWrite(dip_switch, 1, digitalRead(1));
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bitWrite(dip_switch, 2, digitalRead(2));
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bitWrite(dip_switch, 3, digitalRead(3));
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bitWrite(dip_switch, 4, digitalRead(4));
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bitWrite(dip_switch, 5, digitalRead(5));
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bitWrite(dip_switch, 6, digitalRead(6));
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bitWrite(dip_switch, 7, digitalRead(7));
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Wire.write(dip_switch);
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}
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