DDS::DDS(){
// Set pins for DDS output. These pins can be customized to whatever is needed,
// but all pins need to be DI/O pins
W_CLK = 30;
FU_UD = 31;
DATA = 32;
RESET = 33;
//Sine Wave output is on ZOUT1 and ZOUT2
//Square Wave output is on QOUT1 and QOUT2
// OUT1 and OUT2 are inverse waves of eachother
//OUT1
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////////////////////////////////////////////////////////////////////////
//OUT2
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////////////////////////////////////////////////////////////////////////
//Set pins to output mode
pinMode(W_CLK, OUTPUT);
pinMode(FU_UD, OUTPUT);
pinMode(DATA, OUTPUT);
pinMode(RESET, OUTPUT);
//set pins to serial mode
pulseHigh(RESET);
pulseHigh(W_CLK);
pulseHigh(FU_UD);
#ifdef DEBUG
Serial.println("DDS Initialized");
#endif
}
inline uint8_t LCD_Low_Level::read8bits() {
int data = 0;
for (uint8_t i = 0; i < 8; i++) {
pinMode(_data_pins[i], INPUT);
}
pulseHigh();
for (uint8_t i = 0; i < 8; i++) {
data |= (digitalRead(_data_pins[i]) & 0x01) << i;
}
pulseLow();
return data;
}
void DDS::setFreq(double frequency){
//enter frequency as Hz
if(frequency > 40000000){
Serial.println("Frequency is set Higher than board can output");
Serial.println("Setting to Maximum Freq ");
frequency = 40000000;
}
#ifdef DEBUG
Serial.print("Freq: ");
Serial.print(frequency);
Serial.println(" Hz");
#endif
int32_t freq = frequency * 4294967295 / 125000000; // note 125 MHz clock on 9850
for (int b = 0; b < 4; b++, freq>>=8) {
writeByte(freq & 0xFF);
}
writeByte(0x000); // Final control byte
pulseHigh(FU_UD); // Done! Should see output
}
void LCD_Low_Level::pulseEnable() {
pulseHigh();
pulseLow();
}
void DDS::writeByte(byte data){
for (int i=0; i<8; i++, data>>=1) {
digitalWrite(DATA, data & 0x01);
pulseHigh(W_CLK); //after each bit sent, CLK is pulsed high
}
}
