====== IsegClear() ======

''IsegClear()'' clears the FND display.

{{:en-us_commands:reference:isegclear.svg?900|IsegClear command operation flow}}

''bool IsegClear(uint8_t device = 0)''

===== Commands =====

^ Command ^ Arguments ^ Return Value ^ Operation ^
| ''IsegClear(device)'' | ''uint8_t device = 0'' — FND device number ''0~6'', defaults to ''0'' | ''bool'' | Clears the FND display. |


===== Example =====

<code cpp>
void setup() {
  IsegBegin(14, 15);       // MPAINO: TXD(D14), RXD(D15)
  IsegBrightness(7);  // Set display brightness and on/off state.
  IsegClear();  // Clear the FND display.
}

void loop() {
  IsegDecimal((millis() / 1000UL) % 10000UL, true);  // Display an integer in decimal format.
  delay(200);
}
</code>

===== Precautions =====

  * These commands are only for 4-digit FND displays with a TM1637 IC. They do not directly drive a generic multiplexed FND display.
  * Use display commands after successfully calling ''IsegBegin()''.
  * Initialization fails if CLK and DIO use the same pin, or if the device number is ''7'' or higher.
  * ''length + position'' must be 4 or less. Numbers outside the range are not displayed, and ''false'' is returned.
  * Communication may block execution for several ms. Do not call this from an interrupt service routine.
  * Do not use the specified pins simultaneously for UART, PWM, encoders, external interrupts or other functions.
  * Check the actual module and product manuals for FND power and signal voltages.

===== Built-in Commands in the Same Category =====

  * [[:en-us_commands:reference:isegbegin|IsegBegin() View detailed description]]
  * [[:en-us_commands:reference:isegbrightness|IsegBrightness() View detailed description]]
  * [[:en-us_commands:reference:isegwrite|IsegWrite() View detailed description]]
  * [[:en-us_commands:reference:isegdecimal|IsegDecimal() View detailed description]]
  * [[:en-us_commands:reference:iseghex|IsegHex() View detailed description]]
  * [[:en-us_commands:reference:isegencodedigit|IsegEncodeDigit() View detailed description]]

[[:en-us_commands:builtin|← Built-in Command List]]