303 lines
12 KiB
Arduino
303 lines
12 KiB
Arduino
 
|
//============================================================================
|
||
|
|
// HV5122 Nixie tube driver (LEGACY / ORIGINAL VERSION)
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
// Chip: Microchip/Supertex HV5122 - 32-channel high-voltage (up to ~170V)
|
||
|
|
// serial-in shift register / latch, used here to drive Nixie tube
|
||
|
|
// cathodes directly (no external cathode-driver transistors needed).
|
||
|
|
// Wiring: Two HV5122 chips are cascaded (bit-banged, SPI-like, 3-wire bus):
|
||
|
|
// PIN_DIN -> chip0 DIN, chip0 DOUT -> chip1 DIN (daisy-chained),
|
||
|
|
// PIN_CLK -> both chips' CLK (shared),
|
||
|
|
// PIN_OE -> both chips' output-enable (shared, active HIGH here
|
||
|
|
// i.e. energizes/blanks the tubes - see writeDisplay()).
|
||
|
|
// Together the two chips give 64 open-drain HV outputs, addressed
|
||
|
|
// via the digitPins[][] table (pin numbers 1-32 = chip0, 101-132 =
|
||
|
|
// chip1; see clocks.h for the actual per-clock wiring tables).
|
||
|
|
// Status: THIS IS THE OLDER/LEGACY DRIVER. As of the current clocks.h, no
|
||
|
|
// active CLOCK_NN config selects plain "HV5122" anymore - every
|
||
|
|
// HV5122-based config (CLOCK_50, 51, 52, 53, 54, 55, 56, 57, 57A)
|
||
|
|
// now defines NEWHV5122 and is compiled from HV5122new.ino instead.
|
||
|
|
// This file is effectively unused/orphaned code, kept for
|
||
|
|
// reference. It lacks the crossfade/wipe digit-change animation
|
||
|
|
// (animMask/newDigit/oldDigit) support that HV5122new.ino adds -
|
||
|
|
// see HV5122new.ino's header comment for details.
|
||
|
|
//============================================================================
|
||
|
|
#ifdef HV5122 //Nixie driver
|
||
|
|
//P.S. 6x tubes PCB version
|
||
|
|
|
||
|
|
char tubeDriver[] = "HV5122";
|
||
|
|
//HV5122 control pins
|
||
|
|
//#define PIN_DIN 17 // DataIn - chip0 DOUT pin is connected to chip1 DIN pin!
|
||
|
|
//#define PIN_CLK 22 // Clock
|
||
|
|
//#define PIN_OE 21 // OutputEnable
|
||
|
|
|
||
|
|
//int maxDigits = 6;
|
||
|
|
|
||
|
|
//Data pin numbers 100+ means: chip1 pins are used. Chip0-s DOUT is connected to chip1's DIN
|
||
|
|
/* Example:
|
||
|
|
byte digitPins[maxDigits+1][10] = {
|
||
|
|
{2,10,9,8,7,6,5,4,3,1}, //sec 1 , chip0 (tube#0)
|
||
|
|
{11,32,20,19,18,17,16,15,14,13}, //sec 10 , chip0 (tube#1)
|
||
|
|
{22,31,29,30,27,28,25,26,23,24}, //min 1 , chip0 (tube#2)
|
||
|
|
{101,131,110,109,108,107,106,105,104,103}, //min 10 , chip1 (tube#3)
|
||
|
|
{111,132,120,119,118,117,116,115,114,113}, //hour 1 , chip1 (tube#4)
|
||
|
|
{122,129,130,127,128,125,126,123,124,121}, //hour 10 , chip1 (tube#5)
|
||
|
|
{0,12,21,102,112,0, 0,0,0,0} //extra decimal point (tube0...tube6)
|
||
|
|
};
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define SHIFT_LSB_FIRST false //true= LSB first, false= MSB first
|
||
|
|
int PWMrefresh = 10000; //Brightness PWM period (microseconds-ish timer ticks). Greater value => slower brightness PWM frequency
|
||
|
|
//int PWMtiming[11] = {0,500,800,1200,2000,2500,3000,4500,6000,8000,10000};
|
||
|
|
int PWM_min = 500; //shortest allowed ON time (floor, avoids a 0-length timer alarm)
|
||
|
|
int PWM_max = 10000; //longest ON time = full brightness (== PWMrefresh, i.e. tube stays on the whole period)
|
||
|
|
|
||
|
|
void setup_pins() {
|
||
|
|
DPRINTLN("Setup pins - HV5122 Nixie driver...");
|
||
|
|
DPRINT("- CLK : GPIO"); DPRINTLN(PIN_CLK);
|
||
|
|
DPRINT("- DATAIN: GPIO"); DPRINTLN(PIN_DIN);
|
||
|
|
DPRINT("- OUTPUT_ENABLE: GPIO"); DPRINTLN(PIN_OE);
|
||
|
|
pinMode(PIN_CLK, OUTPUT); regPin(PIN_CLK, "PIN_CLK");
|
||
|
|
pinMode(PIN_DIN, OUTPUT); regPin(PIN_DIN, "PIN_DIN");
|
||
|
|
pinMode(PIN_OE, OUTPUT); regPin(PIN_OE, "PIN_OE");
|
||
|
|
digitalWrite(PIN_CLK, HIGH);
|
||
|
|
digitalWrite(PIN_OE, LOW); //keep outputs blanked until clearTubes() below has pushed a known (all-zero) pattern into the shift registers
|
||
|
|
driverSetupStr = "<br>HV5122 pin settings:<br>";
|
||
|
|
for (int i=0;i<maxDigits+1;i++) {
|
||
|
|
driverSetupStr += String("{");
|
||
|
|
for (int j=0;j<10;j++) {
|
||
|
|
driverSetupStr += String(digitPins[i][j]);
|
||
|
|
driverSetupStr += (j==9) ? "}," : ",";
|
||
|
|
}
|
||
|
|
driverSetupStr += String("<br>");
|
||
|
|
}
|
||
|
|
clearTubes();
|
||
|
|
startTimer();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// writeDisplay(): TIMER-ISR. Unlike most other drivers in this project, this
|
||
|
|
// driver does NOT multiplex individual tube positions from here - the full
|
||
|
|
// digit pattern for ALL tubes was already shifted out into the HV5122 latches
|
||
|
|
// by writeDisplaySingle() (called from the main loop). This ISR only toggles
|
||
|
|
// the shared PIN_OE line on/off to implement brightness as a simple
|
||
|
|
// square-wave PWM (whole display blinks ON/OFF at a variable duty cycle -
|
||
|
|
// there is no per-tube time-slicing here since HV5122 has a real static
|
||
|
|
// latch per output, not a multiplexed matrix).
|
||
|
|
#if defined(ESP32)
|
||
|
|
void IRAM_ATTR writeDisplay() { //void IRAM_ATTR writeDisplay(){
|
||
|
|
#else
|
||
|
|
void ICACHE_RAM_ATTR writeDisplay() { //https://circuits4you.com/2018/01/02/esp8266-timer-ticker-example/
|
||
|
|
#endif
|
||
|
|
static volatile int timer = PWMrefresh;
|
||
|
|
static volatile boolean state=true; //true = about to enter/currently in the ON phase of the PWM cycle
|
||
|
|
static volatile int brightness;
|
||
|
|
static int PWMtimeBrightness=PWM_min;
|
||
|
|
|
||
|
|
intCounter++;
|
||
|
|
if (EEPROMsaving) { //stop refresh, while EEPROM write is in progress!
|
||
|
|
#if defined(ESP8266)
|
||
|
|
timer1_write(PWMrefresh);
|
||
|
|
#endif
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(ESP32)
|
||
|
|
portENTER_CRITICAL_ISR(&timerMux);
|
||
|
|
noInterrupts();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
brightness = displayON ? prm.dayBright : prm.nightBright;
|
||
|
|
if (brightness>MAXBRIGHTNESS) brightness = MAXBRIGHTNESS; //only for safety
|
||
|
|
|
||
|
|
if (autoBrightness && displayON) {
|
||
|
|
PWMtimeBrightness = max(PWM_min,PWM_max*lx/MAXIMUM_LUX); //day mode + ALS: scale ON-time by measured lux instead of the stored brightness setting
|
||
|
|
}
|
||
|
|
else
|
||
|
|
PWMtimeBrightness = max(PWM_min,PWM_max*brightness/MAXBRIGHTNESS);
|
||
|
|
|
||
|
|
//At full brightness, force a steady ON state every call instead of letting the
|
||
|
|
//ON/OFF alternation run its course - avoids a needless (and here pointless,
|
||
|
|
//since ON-time==PWMrefresh anyway) OFF sliver caused by scheduling/rounding jitter.
|
||
|
|
if ((!autoBrightness) && (brightness==MAXBRIGHTNESS))
|
||
|
|
state = true;
|
||
|
|
|
||
|
|
if (state) { //ON state
|
||
|
|
timer = PWMtimeBrightness;
|
||
|
|
timerON = timer;
|
||
|
|
}
|
||
|
|
else { //OFF state
|
||
|
|
timer = PWMrefresh-PWMtimeBrightness;
|
||
|
|
timerOFF = timer;
|
||
|
|
}
|
||
|
|
if (timer<500) timer = 500; //safety only... (timerAlarmWrite/timer1_write with 0 or a very small value can hang/misfire)
|
||
|
|
|
||
|
|
if ( (brightness == 0) || (!state) || (!radarON)) { //OFF state, blank digit
|
||
|
|
digitalWrite(PIN_OE, LOW); //OFF -- NOTE: on this board OE is active-HIGH (HIGH=tubes lit), opposite of the active-low /OE found on many shift-register ICs
|
||
|
|
}
|
||
|
|
else { //ON state
|
||
|
|
digitalWrite(PIN_OE, HIGH); //ON
|
||
|
|
}
|
||
|
|
|
||
|
|
state = !state; //flip for next ISR call (alternate ON phase / OFF phase); irrelevant while the full-brightness override above forces true every time
|
||
|
|
|
||
|
|
#if defined(ESP8266)
|
||
|
|
timer1_write(timer);
|
||
|
|
#elif defined(ESP32)
|
||
|
|
portEXIT_CRITICAL_ISR(&timerMux);
|
||
|
|
//ESP32timer = timerBegin(0, PRESCALER, true); //set prescaler, true = edge generated signal
|
||
|
|
//timerAttachInterrupt(ESP32timer, &writeDisplay, true);
|
||
|
|
timerAlarmWrite(ESP32timer, timer, true);
|
||
|
|
timerAlarmEnable(ESP32timer);
|
||
|
|
interrupts();
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
// shift(): bit-bangs one 32-bit word into the HV5122 shift-register chain.
|
||
|
|
// The ~20-NOP delays around each CLK/DIN edge are required because the
|
||
|
|
// HV5122 is a high-voltage part (internal level-shifters to the ~170V rail)
|
||
|
|
// and is much slower than a typical 5V logic shift register - driving it at
|
||
|
|
// full CPU speed without these delays can corrupt shifted-in data.
|
||
|
|
// Data is latched into the HV5122 on the falling edge of CLK.
|
||
|
|
#if defined(ESP32)
|
||
|
|
void IRAM_ATTR shift(uint32_t Data) {
|
||
|
|
#else
|
||
|
|
void ICACHE_RAM_ATTR shift(uint32_t Data) {
|
||
|
|
#endif
|
||
|
|
static boolean b;
|
||
|
|
|
||
|
|
for (uint32_t i = 0; i < 32; i++) {
|
||
|
|
digitalWrite(PIN_CLK, HIGH);
|
||
|
|
for (int t=0;t<20;t++) asm volatile ("nop");
|
||
|
|
if (SHIFT_LSB_FIRST)
|
||
|
|
b = ((Data & (uint32_t(1) << i))) > 0; //LSB first
|
||
|
|
else
|
||
|
|
b = (Data & (uint32_t(1) << (31 - i))) > 0; //MSB first
|
||
|
|
digitalWrite(PIN_DIN, b);
|
||
|
|
for (int t=0;t<20;t++) asm volatile ("nop");
|
||
|
|
digitalWrite(PIN_CLK, LOW); //falling CLK to store DIN
|
||
|
|
for (int t=0;t<20;t++) asm volatile ("nop");
|
||
|
|
}
|
||
|
|
digitalWrite(PIN_CLK, HIGH);
|
||
|
|
for (int t=0;t<20;t++) asm volatile ("nop");
|
||
|
|
}
|
||
|
|
|
||
|
|
void clearTubes() {
|
||
|
|
shift(0);
|
||
|
|
shift(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
// writeDisplaySingle(): builds the two 32-bit bit-buffers (one per cascaded
|
||
|
|
// HV5122 chip) from the current digit[]/digitDP[] state and shifts them out.
|
||
|
|
// Called repeatedly from the main loop (not from the ISR) and self-throttled
|
||
|
|
// to run at most every 50ms, since the bit-bang shift() above is relatively
|
||
|
|
// slow (32 bits x ~60 NOPs, twice) and re-shifting on every idle loop
|
||
|
|
// iteration would be wasteful. NOTE: unlike HV5122new.ino, this version does
|
||
|
|
// NOT check whether anything actually changed since the last call - it always
|
||
|
|
// re-shifts full data every 50ms regardless, and it ignores newDigit[]/
|
||
|
|
// oldDigit[]/animMask[] entirely, so it has no digit-change wipe/crossfade
|
||
|
|
// animation support.
|
||
|
|
void writeDisplaySingle() {
|
||
|
|
static unsigned long lastRun = 0;
|
||
|
|
uint32_t bitBuffer0 = 0;
|
||
|
|
uint32_t bitBuffer1 = 0;
|
||
|
|
byte num;
|
||
|
|
|
||
|
|
if ((millis() - lastRun) < 50) return; //slow down!!!
|
||
|
|
lastRun = millis();
|
||
|
|
|
||
|
|
bitBuffer0 = 0; bitBuffer1 = 0;
|
||
|
|
for (int i = 0; i < maxDigits; i++) { //Set the clock digits
|
||
|
|
num = digit[i];
|
||
|
|
if (num < 10) { //codes 10 (BLANK), 11 (dash), 12 (dp glyph) and 13+ (extra glyphs) have no cathode mapping on a Nixie tube -> leave bits cleared = tube blank
|
||
|
|
if (digitPins[i][num] < 100) {
|
||
|
|
bitBuffer0 |= (uint32_t)(1 << (digitPins[i][num]-1));
|
||
|
|
//DPRINT(digitPins[i][num]); DPRINT(":");
|
||
|
|
} //chip0
|
||
|
|
else {
|
||
|
|
bitBuffer1 |= (uint32_t)(1 << (digitPins[i][num] - 101));
|
||
|
|
//DPRINT(digitPins[i][num]);DPRINT(":");} //chip1
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} //end for i
|
||
|
|
|
||
|
|
#ifdef MAKE_BLINKING_DOTS //it means, the extra datapins are used as 4 blinking dot instead of decimal points!
|
||
|
|
if (showClock) {
|
||
|
|
digitDP[1] = digitDP[2]; //left two dots
|
||
|
|
digitDP[3] = digitDP[4]; //right two dots
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
for (int i = 0; i < maxDigits-1; i++) { //Set the extra decimal point dots
|
||
|
|
if (digitDP[i] && digitPins[maxDigits][i]>0) {
|
||
|
|
if (digitPins[maxDigits][i] < 100)
|
||
|
|
bitBuffer0 |= (uint32_t)(1 << (digitPins[maxDigits][i]-1)); //chip0
|
||
|
|
else
|
||
|
|
bitBuffer1 |= (uint32_t)(1 << (digitPins[maxDigits][i] - 101)); //chip1
|
||
|
|
}
|
||
|
|
} //end for i
|
||
|
|
|
||
|
|
//bitBuffer0 = 1<<cnt; bitBuffer1 = 1<<cnt; cnt++; if (cnt>32) cnt = 0; DPRINTLN(cnt);
|
||
|
|
//Shift chip1 (the far end of the DIN->DOUT daisy-chain) FIRST, then chip0 LAST:
|
||
|
|
//bits shifted in earliest travel furthest down the chain, so chip1's data must
|
||
|
|
//go in before chip0's, otherwise chip0's own data would get pushed on into chip1.
|
||
|
|
shift(bitBuffer1);
|
||
|
|
//delayMicroseconds(1); //for testing on oscilloscope
|
||
|
|
shift(bitBuffer0);
|
||
|
|
//showBits(bitBuffer1); showBits(bitBuffer0); DPRINTLN(" ");
|
||
|
|
}
|
||
|
|
|
||
|
|
//For testing -------------------
|
||
|
|
/*
|
||
|
|
void test() {
|
||
|
|
digitalWrite(PIN_OE, HIGH);
|
||
|
|
clearTubes();
|
||
|
|
for (int j=0;j<2;j++)
|
||
|
|
for (uint32_t i=0;i<32;i++) {
|
||
|
|
DPRINT("D"); DPRINT(i+1); DPRINT(": ");
|
||
|
|
shift((uint32_t)(1 << (i)));
|
||
|
|
DPRINTLN((uint32_t)(1 << (i)),HEX);
|
||
|
|
delay(3000);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void testTubes2() {
|
||
|
|
while (true) {
|
||
|
|
|
||
|
|
DPRINTLN("Testing tubes: ");
|
||
|
|
for (int i = 0; i < 10; i++) {
|
||
|
|
DPRINT(i); DPRINT(" ");
|
||
|
|
for (int j = 0; j < maxDigits; j++) {
|
||
|
|
digit[j] = i;
|
||
|
|
digitDP[j] = i % 2;
|
||
|
|
}
|
||
|
|
//changeDigit();
|
||
|
|
|
||
|
|
writeDisplaySingle();
|
||
|
|
delay(3000);
|
||
|
|
yield();
|
||
|
|
}
|
||
|
|
} //end while
|
||
|
|
}
|
||
|
|
|
||
|
|
void showBits(uint32_t bits) {
|
||
|
|
boolean b;
|
||
|
|
|
||
|
|
for (uint32_t i = 0; i < 32; i++) {
|
||
|
|
if (SHIFT_LSB_FIRST)
|
||
|
|
b = ((bits & (uint32_t(1) << i))) > 0; //LSB first
|
||
|
|
else
|
||
|
|
b = (bits & (uint32_t(1) << (31 - i))) > 0; //MSB first
|
||
|
|
if (b) {
|
||
|
|
DPRINT("1");
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
DPRINT("0");
|
||
|
|
}
|
||
|
|
} //end for
|
||
|
|
DPRINT("-");
|
||
|
|
}
|
||
|
|
|
||
|
|
*/
|
||
|
|
#endif
|