Table of Contents
IsegWrite()
IsegWrite() outputs segment data at the specified position.
bool IsegWrite(const uint8_t segments[], uint8_t length = 4, uint8_t position = 0, uint8_t device = 0)
Commands
| Command | Arguments | Return Value | Operation |
|---|---|---|---|
IsegWrite(segments, length, position, device) | const uint8_t segments[] — Array of XGFEDCBA segment bits for each digituint8_t length = 4 — Number of digits to write 1~4uint8_t position = 0 — Start position 0~3; the leftmost digit is 0uint8_t device = 0 — FND device number 0~6, defaults to 0 | bool | Outputs segment data at the specified position. |
Example
const uint8_t CLK_PIN = 14; const uint8_t DIO_PIN = 15; void setup() { IsegBegin(CLK_PIN, DIO_PIN, 100, 0); // Set the CLK/DIO pins and device number of the TM1637 FND. IsegBrightness(5, true, 0); // Set display brightness and on/off state. } void loop() { const uint16_t value = analogRead(A0); // Read the raw analog value of the specified channel. uint8_t digits[4] = { IsegEncodeDigit((value / 1000) % 10), // Convert one digit to segment data. IsegEncodeDigit((value / 100) % 10), // Convert one digit to segment data. IsegEncodeDigit((value / 10) % 10), // Convert one digit to segment data. IsegEncodeDigit(value % 10) // Convert one digit to segment data. }; IsegWrite(digits, 4, 0, 0); // Output segment data at the specified position. delay(100); }
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
7or higher. length + positionmust be 4 or less. Numbers outside the range are not displayed, andfalseis 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.