![]() I know from experience some low power ones get out to over 250ns and commercially we only switch the data bus when we lift the E-clock line you leave the data out on the bus until then to meet the data hold requirements. That LCD is fast the data hold is only 10ns some are much much slower PulseEnable() /* E-CLK PULSED high then low */ĭigitalWrite (LCD_D4,(bits & 0x1)) /* REALLY you are going to change the data immediately what about data hold */ I've reduced pauses/delays to the minimum so it runs fast.Ĭode: Select all void lcd_byte(char bits) Lcd_byte(0x0C) // display on, cursor off, blink off ![]() ![]() WiringPiSetupGpio () // use BCIM numbering ![]() * Simple program to send a string to the LCDĭelay(0.5) // 1/2 microsecond pause - enable pulse must be > 450nsīefore calling use SetChrMode or SetCmdMode to determine whether to send character or commandĭigitalWrite (LCD_RS, 0) // set for commandsĭigitalWrite (LCD_RS, 1) // set for characters ![]()
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