void i2c_eeprom_slave_init(void) {
uint64_t uid = uid_get_uid64();
memcpy(eeprom.memory, &uid, sizeof(uint64_t));
eeprom.offset = 0;
eeprom.acquire = 0;
eeprom.page = 0;
const Pin twi_pins[] = {PINS_TWI_STACK};
// Configure TWI pins
PIO_Configure(twi_pins, PIO_LISTSIZE(twi_pins));
// Enable TWI peripheral clock
PMC->PMC_PCER0 = 1 << ID_TWI1;
// Configure TWI interrupts
NVIC_DisableIRQ(TWI1_IRQn);
NVIC_ClearPendingIRQ(TWI1_IRQn);
NVIC_SetPriority(TWI1_IRQn, PRIORITY_EEPROM_SLAVE_TWI1);
NVIC_EnableIRQ(TWI1_IRQn);
// Configure TWI as slave, with address I2C_EEPROM_SLAVE_ADDRESS
TWI_ConfigureSlave(TWI_STACK, I2C_EEPROM_SLAVE_ADDRESS);
// Enable TWI interrupt
TWI_EnableIt(TWI_STACK, TWI_IER_SVACC);
}
void TwoWire::begin(uint8_t address) {
if (onBeginCallback)
onBeginCallback();
// Disable PDC channel
twi->TWI_PTCR = UART_PTCR_RXTDIS | UART_PTCR_TXTDIS;
TWI_ConfigureSlave(twi, address);
status = SLAVE_IDLE;
TWI_EnableIt(twi, TWI_IER_SVACC);
//| TWI_IER_RXRDY | TWI_IER_TXRDY | TWI_IER_TXCOMP);
}