MCP4728_Example.c

#define _HARDWARE_TWI_
#include "MCP4728.h"

#define TWI_BAUD 0x3B // (F_CPU / (2 * TWI_SPEED)) - 5 (truncated to byte)

int main(void)
{
	// Configure TWIE

	// Clear Bit 6 corresponding to TWIE
	PR.PRPE &= ~PR_TWI_bm;
	// Set pins to wired and pulled up
	PORTE.PIN0CTRL = PORT_OPC_WIREDANDPULL_gc;
	PORTE.PIN1CTRL = PORT_OPC_WIREDANDPULL_gc;
	// Set the TWIE enable bit
	TWIE.MASTER.CTRLA = TWI_MASTER_ENABLE_bm;
	// Set the TWIE Master baud rate
	TWIE.MASTER.BAUD = TWI_BAUD;
	// Set the bus STATUS register to idle
	TWIE.MASTER.STATUS = TWI_MASTER_BUSSTATE_IDLE_gc;
	// Set LDAC to high and output
	PORTA.OUTSET = 0x01;
	PORTA.DIRSET = 0x01;
	// Using TWIE, PA0 for LDAC, and default address
	MCP4728_Init(&TWIE, &PORTA, 0x01, 0x00);
	// SDA is PE0, SCL is PE1
	uint8_t address = MCP4728_ReadAddress(&PORTE, 0x01, 0x02);
	// Set outputs to a random value
	uint16_t values[] = { 0x3FF, 0x3FF, 0x3FF, 0x3FF };
	MCP4728_FastWrite((uint8_t *)values, 4);

	while (1);
}