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// include the library code:
#include <LiquidCrystal.h>
#include <SPI.h>
#include <MD_AD9833.h>
#include "pins_arduino.h"
/* Digital potentiometer constants */
#define DP_nINC 4 // D4
#define DP_UnD 3 // D3
#define DP_nCS 2 // D2
/* LCD Constants */
#define LCD_D7 14 // A0
#define LCD_D6 15 // A1
#define LCD_D5 16 // A2
#define LCD_D4 17 // A3
#define LCD_E 19 // A5
#define LCD_RS 5 // D5
/* Function generator constants */
#define DATA 11 // D11
#define CLK 13 // D13
#define FSYNC 10 // D10
/* Other pin definition constants */
#define VBAT 21 // A7
#define CAP_ON 18 // A4
#define CATHODE_PWM 9 // D9
/* Boolean Constants */
#define OFF false
#define ON true
/* Encoder constants */
#define ENC_A 8 // D8
#define ENC_B 7 // D7
#define ENC_SW 6 // D6
/* Encoder States */
#define UP 1
#define DOWN -1
#define SAME 0
/* Sequential state machine constants */
enum OutputConstants { NOFF = 1, SINE, TRIG, SQUARE };
enum States { StateOut = 1, StateAmplitude, Coupling, StateFreqHz, StateFreqKhz, StateFreqMhz, Brightness};
/* Custom LCD battery characters */
byte Bat0[8] = {0b01110, 0b11011, 0b10001, 0b10001, 0b10001, 0b10001, 0b10001, 0b11111};
byte Bat1[8] = {0b01110, 0b11011, 0b10001, 0b10001, 0b10001, 0b11111, 0b11111, 0b11111};
byte Bat2[8] = {0b01110, 0b11011, 0b10001, 0b11111, 0b11111, 0b11111, 0b11111, 0b11111};
byte Bat3[8] = {0b01110, 0b11111, 0b11111, 0b11111, 0b11111, 0b11111, 0b11111, 0b11111};
/* AD9833 & LCD Library objects definition */
MD_AD9833 AD(FSYNC);
MD_AD9833::channel_t chan;
MD_AD9833::mode_t mode;
LiquidCrystal lcd(LCD_RS, LCD_E, LCD_D4, LCD_D5, LCD_D6, LCD_D7);
/* Global state machine in-used variables */
unsigned char MenuState = StateOut; // Initial state
volatile uint8_t OutType = NOFF; // Output waveform type
volatile uint8_t DigiPotState = 0; // Digital potentiometer wiper state
volatile bool CouplingOn = true; // AC or DC coupling state
volatile uint8_t BrightnessState = 0; // LCD Backlight brightness state
/* Encoder pins state */
volatile bool encoder_A = false;
volatile bool encoder_B = false;
volatile bool encoder_A_prev = false;
/* Frequency states */
volatile uint32_t FreqHz = 0;
volatile uint32_t FreqKhz = 0;
volatile uint32_t FreqMhz = 0;
/* Function prototypes */
volatile uint8_t *port_to_pcmask[] = { &PCMSK0, &PCMSK1,&PCMSK2 };
static int PCintMode[24];
typedef void (*voidFuncPtr)(void);
volatile static voidFuncPtr PCintFunc[24] = { NULL };
volatile static uint8_t PCintLast[3];
void EnableInterrupts();
void DisableInterrupts();
void InitEncoder();
void InitOther();
void InitDigipot();
void CreateLcdChars();
byte ProcessBatteryVoltage();
void SetLcdBrightness(int brightness);
void PotDown();
void PotUp();
void InitPotState();
void InitDevice();
void SetADFrequency();
void SetADOutput();
void SetADOutType();
void BrightnessUp();
void BrightnessDown();
volatile int GetEncoderPos();
void EncoderPositionChanged();
void MainMenu();
/* Pin-change interrupts block */
/* /////////////////////////// */
void PCattachInterrupt(uint8_t pin, void (*userFunc)(void), int mode)
{
uint8_t bit = digitalPinToBitMask(pin);
uint8_t port = digitalPinToPort(pin);
uint8_t slot;
volatile uint8_t *pcmask;
// map pin to PCIR register
if (port == NOT_A_PORT) return;
else {
port -= 2;
pcmask = port_to_pcmask[port];
}
if (port == 1) slot = port * 8 + (pin - 14);
else slot = port * 8 + (pin % 8);
PCintMode[slot] = mode;
PCintFunc[slot] = userFunc;
*pcmask |= bit;
PCICR |= 0x01 << port;
}
void PCdetachInterrupt(uint8_t pin) {
uint8_t bit = digitalPinToBitMask(pin);
uint8_t port = digitalPinToPort(pin);
volatile uint8_t *pcmask;
// map pin to PCIR register
if (port == NOT_A_PORT) return;
else {
port -= 2;
pcmask = port_to_pcmask[port];
}
*pcmask &= ~bit;
if (*pcmask == 0) PCICR &= ~(0x01 << port);
}
static void PCint(uint8_t port) {
uint8_t bit;
uint8_t curr;
uint8_t mask;
uint8_t pin;
curr = *portInputRegister(port+2);
mask = curr ^ PCintLast[port];
PCintLast[port] = curr;
if ((mask &= *port_to_pcmask[port]) == 0) return;
for (uint8_t i=0; i < 8; i++) {
bit = 0x01 << i;
if (bit & mask) {
pin = port * 8 + i;
// Trigger interrupt if mode is CHANGE, or if mode is RISING and
// the bit is currently high, or if mode is FALLING and bit is low.
if ((PCintMode[pin] == CHANGE
|| ((PCintMode[pin] == RISING) && (curr & bit))
|| ((PCintMode[pin] == FALLING) && !(curr & bit)))
&& (PCintFunc[pin] != NULL)) {
PCintFunc[pin]();
}
}
}
}
/* Interrupt masking functions */
SIGNAL(PCINT0_vect) { PCint(0); }
SIGNAL(PCINT1_vect) { PCint(1); }
SIGNAL(PCINT2_vect) { PCint(2); }
/* End of pin-change interrupts block */
/* ////////////////////////////////// */
/* Enable/disable encoder pin interrupts */
void EnableInterrupts()
{
PCattachInterrupt(ENC_A, EncoderPositionChanged, CHANGE);
PCattachInterrupt(ENC_B, EncoderPositionChanged, CHANGE);
}
void DisableInterrupts()
{
PCdetachInterrupt(ENC_A);
PCdetachInterrupt(ENC_B);
}
void InitEncoder()
{
pinMode(ENC_A, INPUT);
pinMode(ENC_B, INPUT);
pinMode(ENC_SW, INPUT);
}
void InitOther()
{
pinMode(VBAT, INPUT_PULLUP);
pinMode(CAP_ON, OUTPUT);
pinMode(CATHODE_PWM, OUTPUT);
}
void InitDigipot()
{
pinMode(DP_nINC, OUTPUT);
pinMode(DP_UnD, OUTPUT);
pinMode(DP_nCS, OUTPUT);
}
void CreateLcdChars()
{
lcd.createChar(1, Bat0);
lcd.createChar(2, Bat1);
lcd.createChar(3, Bat2);
lcd.createChar(4, Bat3);
}
/* Process Li-ion battery voltage state and return appropriate character */
byte ProcessBatteryVoltage()
{
int BatVoltage = analogRead(VBAT);
//Serial.println(BatVoltage);
if (BatVoltage >= 950 && BatVoltage <= 1023) return (byte)4;
else if (BatVoltage >= 900 && BatVoltage < 950) return (byte)3;
else if (BatVoltage >= 850 && BatVoltage < 900) return (byte)2;
else {
//Serial.println("Encoder came here");
return (byte)1;
}
}
void SetLcdBrightness(int brightness)
{
analogWrite(CATHODE_PWM, brightness);
}
void PotDown()
{
for (uint8_t i = 0; i < 4; i++) {
digitalWrite(DP_UnD, LOW);
digitalWrite(DP_nINC, LOW);
delayMicroseconds(100);
digitalWrite(DP_nINC, HIGH);
delayMicroseconds(100);
if (DigiPotState <= 0) DigiPotState = 0;
else DigiPotState--;
}
}
void PotUp()
{
for (uint8_t i = 0; i < 4; i++) {
digitalWrite(DP_UnD, HIGH);
digitalWrite(DP_nINC, LOW);
delayMicroseconds(100);
digitalWrite(DP_nINC, HIGH);
delayMicroseconds(100);
if (DigiPotState >= 255) DigiPotState = 255;
else DigiPotState++;
}
}
void InitPotState()
{
digitalWrite(DP_nCS, LOW);
_delay_ms(10);
for (uint8_t i = 0; i < 255; i++) PotDown();
}
void InitDevice()
{
InitEncoder();
InitDigipot();
InitPotState();
InitOther();
Serial.begin(57600);
Serial.println("Serial logger is enabled");
lcd.begin(16, 2);
AD.begin();
}
void SetADFrequency()
{
uint32_t u1 = FreqHz + (FreqKhz * 1000) + (FreqMhz * 1000000);
chan = MD_AD9833::CHAN_0;
AD.setFrequency(chan, u1);
}
void SetADOutput()
{
chan = MD_AD9833::CHAN_0;
AD.setActiveFrequency(chan);
}
void SetADOutType()
{
switch (OutType)
{
case NOFF: mode = MD_AD9833::MODE_OFF; break;
case SINE: mode = MD_AD9833::MODE_SINE; break;
case TRIG: mode = MD_AD9833::MODE_TRIANGLE; break;
case SQUARE: mode = MD_AD9833::MODE_SQUARE1; break;
default: break;
}
AD.setMode(mode);
}
void setup() {
InitDevice();
CreateLcdChars();
SetADOutput();
pinMode(A4,OUTPUT);
digitalWrite(A4,HIGH);
mode = MD_AD9833::MODE_OFF;
AD.setMode(mode);
SetADFrequency();
BrightnessState = 127;
SetLcdBrightness(BrightnessState);
}
void BrightnessUp() {
if (BrightnessState >= 250) BrightnessState = 255;
else BrightnessState += 4;
SetLcdBrightness(BrightnessState);
}
void BrightnessDown() {
if (BrightnessState <= 5) BrightnessState = 0;
else BrightnessState -= 4;
SetLcdBrightness(BrightnessState);
}
volatile int GetEncoderPos()
{
volatile int RetVal = 0;
encoder_A = digitalRead(ENC_A);
encoder_B = digitalRead(ENC_B);
delay(10);
if((!encoder_A) && (encoder_A_prev)){
if(encoder_B) RetVal = 1;
else RetVal = -1;
}
else RetVal = 0;
encoder_A_prev = encoder_A; // Store value of A for next time
return RetVal;
}
void EncoderPositionChanged()
{
switch(MenuState) {
case StateFreqHz:
switch(GetEncoderPos()) {
case UP:
if (FreqHz >= 900) FreqHz = 900;
else FreqHz += 10;
break;
case DOWN:
if (FreqHz < 10) FreqHz = 0;
else FreqHz-= 10;
break;
default: break;
}
SetADFrequency();
break;
case StateFreqKhz:
switch(GetEncoderPos()) {
case UP:
if (FreqKhz >= 900) FreqKhz = 900;
else FreqKhz += 1;
break;
case DOWN:
if (FreqKhz <= 10) FreqKhz = 0;
else FreqKhz -= 1;
break;
default: break;
}
SetADFrequency();
break;
case StateFreqMhz:
switch(GetEncoderPos()) {
case UP:
if (FreqMhz >= 10) FreqMhz = 10;
else FreqMhz++;
break;
case DOWN:
if (FreqMhz <= 0) FreqMhz = 0;
else FreqMhz--;
break;
default: break;
}
SetADFrequency();
break;
case StateAmplitude:
switch(GetEncoderPos()) {
case UP: PotUp(); break;
case DOWN: PotDown(); break;
default: break;
}
break;
case StateOut:
switch(GetEncoderPos()) {
case UP:
if (OutType >= SQUARE) OutType = SQUARE;
else OutType++;
break;
case DOWN:
if (OutType <= NOFF) OutType = NOFF;
else OutType--;
break;
default: break;
}
SetADOutType();
break;
case Coupling:
switch(GetEncoderPos()) {
case UP: CouplingOn = true; break;
case DOWN: CouplingOn = false; break;
default: break;
}
digitalWrite(CAP_ON,CouplingOn);
break;
case Brightness:
switch(GetEncoderPos()) {
case UP: BrightnessUp(); break;
case DOWN: BrightnessDown(); break;
default: break;
}
break;
default: break;
}
}
void MainMenu()
{
MenuState = StateOut;
EnableInterrupts();
bool OutConfirm = false;
while(!OutConfirm)
{
switch(MenuState)
{
case StateFreqHz:
lcd.setCursor(0,0);
lcd.print("<Frequency: Hz >");
lcd.setCursor(0,1);
lcd.print("<Val:");
lcd.setCursor(5,1);
lcd.print(FreqHz);
if (FreqHz <= 9) {
lcd.setCursor(6,1);
lcd.print(" ");
}
else if (FreqHz > 9 && FreqHz <= 99) {
lcd.setCursor(7,1);
lcd.print(" ");
}
lcd.setCursor(8,1);
lcd.print("[Hz] >");
if (!digitalRead(ENC_SW)) {
while(!digitalRead(ENC_SW));
MenuState = StateFreqKhz;
}
break;
case StateFreqKhz:
lcd.setCursor(0,0);
lcd.print("<Frequency:KHz >");
lcd.setCursor(0,1);
lcd.print("<Val:");
lcd.setCursor(5,1);
lcd.print(FreqKhz);
if (FreqKhz <= 9) {
lcd.setCursor(6,1);
lcd.print(" ");
}
else if (FreqKhz > 9 && FreqKhz <= 99) {
lcd.setCursor(7,1);
lcd.print(" ");
}
lcd.setCursor(8,1);
lcd.print("[KHz] >");
if (!digitalRead(ENC_SW)) {
while(!digitalRead(ENC_SW));
MenuState = StateFreqMhz;
}
break;
case StateFreqMhz:
lcd.setCursor(0,0);
lcd.print("<Frequency:MHz >");
lcd.setCursor(0,1);
lcd.print("<Val:");
lcd.setCursor(5,1);
lcd.print(FreqMhz);
if (FreqMhz <= 9) {
lcd.setCursor(6,1);
lcd.print(" ");
}
else if (FreqMhz > 9 && FreqMhz <= 99) {
lcd.setCursor(7,1);
lcd.print(" ");
}
lcd.setCursor(8,1);
lcd.print("[MHz] >");
if (!digitalRead(ENC_SW)) {
while(!digitalRead(ENC_SW));
MenuState = Brightness;
}
break;
case StateAmplitude:
lcd.setCursor(0,0);
lcd.print("<Amplitude in %>");
lcd.setCursor(0,1);
lcd.print("<Value:");
lcd.setCursor(7,1);
lcd.print((DigiPotState*100)/255);
if ((DigiPotState*100)/255 <= 9) {
lcd.setCursor(8,1);
lcd.print(" ");
}
else if ((DigiPotState*100)/255 > 9 && (DigiPotState*100)/255 < 100) {
lcd.setCursor(9,1);
lcd.print(" ");
}
lcd.setCursor(10,1);
lcd.print(" [%] >");
if (!digitalRead(ENC_SW)) {
while(!digitalRead(ENC_SW));
MenuState = Coupling;
}
break;
case StateOut:
lcd.setCursor(0,0);
lcd.print("< Out Type >");
lcd.setCursor(0,1);
lcd.print("<Out:");
lcd.setCursor(5,1);
switch (OutType)
{
case NOFF: lcd.print("Off >"); break;
case SINE: lcd.print("Sine >"); break;
case TRIG: lcd.print("Triangle >"); break;
case SQUARE: lcd.print("Square >"); break;
default: break;
}
if (!digitalRead(ENC_SW)) {
while(!digitalRead(ENC_SW));
MenuState = StateAmplitude;
}
break;
case Coupling:
lcd.setCursor(0,0);
lcd.print("< Out Coupling >");
lcd.setCursor(0,1);
lcd.print("<Type:");
lcd.setCursor(6,1);
switch (CouplingOn)
{
case true: lcd.print(" [DC] >"); break;
case false: lcd.print(" [AC] >"); break;
default: break;
}
if (!digitalRead(ENC_SW)) {
while(!digitalRead(ENC_SW));
MenuState = StateFreqHz;
}
break;
case Brightness:
lcd.setCursor(0,0);
lcd.print("< Brightness >");
lcd.setCursor(0,1);
lcd.print("<Value:");
lcd.setCursor(7,1);
lcd.print((BrightnessState*100)/255);
if ((BrightnessState*100)/255 <= 9) {
lcd.setCursor(8,1);
lcd.print(" ");
}
else if ((BrightnessState*100)/255 > 9 && (BrightnessState*100)/255 < 100) {
lcd.setCursor(9,1);
lcd.print(" ");
}
lcd.setCursor(10,1);
lcd.print(" [%] >");
if (!digitalRead(ENC_SW)) {
while(!digitalRead(ENC_SW));
OutConfirm = true;
}
break;
}
delay(50);
}
DisableInterrupts();
}
void loop() {
/* Battery Character */
lcd.setCursor(15, 0);
lcd.write(ProcessBatteryVoltage());
/* Out State */
lcd.setCursor(0,0);
lcd.print("<Output:");
lcd.setCursor(8,0);
if (OutType != NOFF) lcd.print("ON ");
else lcd.print("OFF");
lcd.setCursor(11,0);
lcd.print(" > ");
/* Output Type */
lcd.setCursor(0,1);
lcd.print("<Y:");
lcd.setCursor(3,1);
switch(OutType) {
case NOFF: lcd.print("OFF "); break;
case SINE: lcd.print("SIN "); break;
case TRIG: lcd.print("TRN "); break;
case SQUARE: lcd.print("SQR "); break;
default: break;
}
/* Amplitude */
lcd.setCursor(7,1);
lcd.print("[A]:");
lcd.print((DigiPotState*100)/255);
if ((DigiPotState*100)/255 <= 9) {
lcd.setCursor(12,1);
lcd.print(" ");
}
else if ((DigiPotState*100)/255 > 9 && (DigiPotState*100)/255 < 100) {
lcd.setCursor(13,1);
lcd.print(" ");
}
lcd.setCursor(14,1);
lcd.print("%>");
if (!digitalRead(ENC_SW)) {
while(!digitalRead(ENC_SW));
MainMenu();
}
delay(50);
}

復制代碼

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