C++ abstraction for controlling up to 6 nixie tubes. Compatible with most platforms that provide standard GPIO write and delay/sleep functions. Put the c++ and h files in a folder called "src" to use with Arduino.

• Any modern microcontroller
• Sufficient GPIO to interface with the tubes, or GPIO expander.

Declare uint8_t arrays pinout1 through pinout6, containing the control pins for each digit ordered from 0 to 9.

uint8_t pinout1[10] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
uint8_t pinout2[10] = {....}
...
...
uint8_t pinout6[10] = {....}

Instantiate the NixieDisplay object.

NixieDisplay display(uint8_t active, uint8_t offset, 
uint8_t pinout1[], uint8_t pinout2[], uint8_t pinout3[], uint8_t pinout4[], uint8_t pinout5[], uint8_t pinout6[]);

Initialize display.

display.init();

Write a number to the display.

display.write(uint32_t num);

Or write time to the display.

display.writeTime(struct tm *time);

Clear the display. This blanks the display and may not have the same effect as disabling the nixie tube's power supply.

display.clear();

Option to enable/disable crossfading of digits between write() calls. Defaults to true.

display.setCrossfade(bool crossfade)

Option to enable/disable scrollback of digits between write() calls. Defaults to true.

display.setScrollback(bool scrollback)

Run cathode protection type nixie_display_protection_t for a duration of ms (minimum duration is CATHODE_PROTECTION_INTER_MS*10). Optional parameter CATHODE_PROTECTION_INTER_MS to determine on time of each digit.

display.runProtection(nixie_display_protection_t type, uint32_t ms, uint32_t CATHODE_PROTECTION_INTER_MS = 15);

Add this function to the main.c file. It must contain a platform-specific method for writing to GPIO. Return false if no error.

bool platformGPIOWrite(uint8_t pin, bool data) {
    xxxx.write(pin, data) // write to GPIO expander or other IO device
    return false;
}

Add this function to the main.c file. It must contain a platform-specific method for milisecond delays.

void platformDelayMs(uint32_t ms){
  vTaskDelay(ms);
}