Generador de señal seno con dspic

Objetivo:

Generar un señal senoidal con un dspic

Diagrama en Proteus

Código en Mikro for dspic Pro

// Lcd module connections
sbit LCD_RS at LATB2_bit; // LATB escribe en la salida
sbit LCD_EN at LATB3_bit;
sbit LCD_D4 at LATB4_bit;
sbit LCD_D5 at LATB5_bit;
sbit LCD_D6 at LATB6_bit;
sbit LCD_D7 at LATB7_bit;

sbit LCD_RS_Direction at TRISB2_bit; // TRISB configuracion como entrada o salida
sbit LCD_EN_Direction at TRISB3_bit;
sbit LCD_D4_Direction at TRISB4_bit;
sbit LCD_D5_Direction at TRISB5_bit;
sbit LCD_D6_Direction at TRISB6_bit;
sbit LCD_D7_Direction at TRISB7_bit;
// End Lcd module connections

sbit loadPin at LATB13_bit; // DAC load pin pone un cero en LATB13
sbit loadPinDir at TRISB13_bit; // DAC load pin
sbit csPin at LATB12_bit; // DAC CS pin
sbit csPinDir at TRISB12_bit; // DAC CS pin

//char txt3[] = "Hola Mundo";
//char txt[10]; .
//char txt2[10];

int adcRes;
int adcResFiltrada;

float frecuencia=60;
float frecuenciamuestreo=10000;
float frecuenciadigital;
int muestra;
int y;

short bandera = 0;

//Timer1
//Prescaler 1:1; PR1 Preload = 400; Actual Interrupt Time = 100 us

//Place/Copy this part in declaration section
//Timer1
//Prescaler 1:1; PR1 Preload = 400; Actual Interrupt Time = 100 us

//Place/Copy this part in declaration section
void config_timer(){
T1CON = 0x8000;
T1IE_bit = 1;
T1IF_bit = 0;
IPC0 = IPC0 | 0x1000;
PR1 = 400;
}

void Timer1Interrupt() iv IVT_ADDR_T1INTERRUPT{
T1IF_bit = 0;
//Enter your code here
bandera = 1;
}

short indice = 0;
short indice2 = 0;

void main() {

//Lcd_Init();
//Lcd_Cmd(_LCD_CLEAR); // Clear display
//Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off
TRISA.F0 = 1; //pin RA0 como entrada
TRISB.F15 = 1;

TRISB.F14 = 0; //RB14 como salida

//PPS_Mapping(10, _OUTPUT, _SCK1OUT); // Sets pin 15 to be Input, and maps RX2/DT2 Input to it
//PPS_Mapping(11, _OUTPUT, _SDO1); // Sets pin 5 to be Output, and maps EUSART2 Asynchronous Transmit/Synchronous Clock Output to it
RPOR5 = 0x0708;
// DAC setup
loadPinDir = 0; // LOAD pin
csPinDir = 0; // CS pin
csPin = 1; // Set CS to inactive
loadPin = 1; // Set LOAD to inactive

// SPI setup
SPI1_Init_Advanced(_SPI_MASTER, _SPI_16_BIT,_SPI_PRESCALE_SEC_1, _SPI_PRESCALE_PRI_1,
_SPI_SS_DISABLE, _SPI_DATA_SAMPLE_MIDDLE, _SPI_CLK_IDLE_HIGH,
_SPI_ACTIVE_2_IDLE);
//ADC1_Init_Advanced(_ADC_12bit, _ADC_INTERNAL_REF);
config_timer();

TRISB.F15 = 0;
LATB.F15 = 0;
LATB.F14 =1;

//Lcd_Out(1,1,txt3); // Write text in first row
frecuenciadigital=frecuencia/frecuenciamuestreo;

for(;;){
if( bandera == 1){

bandera = 0;

y=floor((1*sin(2*3.1416*muestra*frecuenciadigital))*2048 + 2048); // calculo seno digital de 12 bits // calculo sino digital de 12 bits; // calculo sino digital de 12 bits

muestra++;

if( indice == 69) {

indice = 0;
}

csPin = 0; // CS enable for DAC
SPI1_Write(0x3000 | y);
loadPin = 0; // Load data in DAC
delay_us(2);
loadPin = 1;
csPin = 1; // CS disable for DAC
//WordToStr(adcResFiltrada, txt2);
//Lcd_Out(2,1,txt2);
}
//Delay_ms(50);
}
}