i2c_init update to work with atmega32a boards (#5562)
* On i2c_init, enable two wire interface, twi interrupt, and slave address ACK along with pull up resistors. * thanks to some testing by drashna, we know that setting TWI doesn't work for all boards. Putting the new code into an ifdef block
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@ -18,6 +18,18 @@
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void i2c_init(void) {
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void i2c_init(void) {
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TWSR = 0; /* no prescaler */
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TWSR = 0; /* no prescaler */
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TWBR = (uint8_t)TWBR_val;
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TWBR = (uint8_t)TWBR_val;
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#ifdef __AVR_ATmega32A__
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// set pull-up resistors on I2C bus pins
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PORTC |= 0b11;
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// enable TWI (two-wire interface)
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TWCR |= (1 << TWEN);
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// enable TWI interrupt and slave address ACK
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TWCR |= (1 << TWIE);
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TWCR |= (1 << TWEA);
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#endif
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}
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}
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i2c_status_t i2c_start(uint8_t address, uint16_t timeout) {
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i2c_status_t i2c_start(uint8_t address, uint16_t timeout) {
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