Adafruit_Pcd8544.H

If youve ever worked with arduino, youve probably wanted it to display sensor readings. Using the serial monitor is perfectly fine, but being the arduino badass you. My goal for this project is to make a watch with selectable dials, stopwatch and millidays. This idea started with an Aprils fools prank about metrictime. Adafruit_Pcd8544.H' title='Adafruit_Pcd8544.H' />How to use the Nokia 5. LCD Module at Arduino. Dont use the Nokia 5. LCD anymore I experienced contact problems and unstable brightness, so better take another LCD. LCD displays have a low power consumption and a good sunlight visibility. But when this is not necessary, you better take a modern TFT display now you can buy a 2. TFT colour display already for 5 2. Adafruit_Pcd8544.H' title='Adafruit_Pcd8544.H' />TFT 2. Arduino, serial SPI or I2. CHardware. The Nokia 5. LCD Module uses a Philips PCD8. LCD driver, which is designed for mobile phones. Nokia 5. 11. 0 LCD Module 8. X4. 8 with backlight Operation at 3. VMany devices that can be used with an Arduino, require a power supply of 3. V. This is also the case with the Nokia 5. The best way to deal with 3. V devices is to take an Arduino Pro, which can run on 3. V.  Thanks to the internal clamp of the PCD8. Four current limiting resistors of 1. When an LCD control line is high, the current through the 1. A, so this is harmless. Note that we cant read back from the LCD with this circuit. Operation at 5. VBecause VDD max 7. V, the PCD8. 54. 4 controller can handle 5. V, but the Nokia 5. LCD works best at 3. V. The four resistors of 1. LCD display. Connecting Nokia 5. LCD to Arduino with 3 wires. Note that the Arduino SPI pins 1. SPI. PCD8. 54. 4 supply current versus supply voltage. PCD8. 54. 4 supply current versus supply voltage. Using the control lines. The Nokia 5. 11. 0 LCD has 5 control lines the interface is of the type SPI. Mostly, when no other SPI devices are used, the chip select can be connected to the GND, so 4 control lines stay over. To save Arduino pins, there is an option to use only 3 control lines, while the Nokia reset pin is connected to the Arduino reset. This works only when the serial monitor is used, not with a standalone Arduino. Auto reset circuit. An option is to generate a reset pulse on power up automatically, with a RC combination, to save one control line to the Arduino. However, I found out that this solution is poorly reproducible the proper functioning depends for instance on the capacitor across the 3. V supply. Also the Arduino cant be used with the serial monitor anymore. One Licence Rds Two Servers here. Nokia 5. 11. 0 LCD with different connector wiring. Not all Nokia 5. 11. LCDs are the same. Although they look identical, the connector wiring can be completely different. Software. Improved PCD8. Limor Fried from Adafruit has created a library which can be download at github. I have changed the library a little bit, you can download it here. Changes Solved problems with bad LCD contacts. Added clear and init, for compatibility with older library versions. Unzip the library and place it into the Arduino library folder like this librariesAdafruitPCD8. For troubleshooting see HERE. Also install the AdafruitGFX library in the same way. The LCD is connected to the PCB by means of a conductive rubber strip this sometimes causes contact problems and a black screen. Restoring the connection doesnt help the LCD must be re initialized by manually restarting the Arduino. This is inconvenient. The LCD application can be made more robust by initializing the LCD repeatedly with an interval of about 2s. This allows disconnecting and reconnecting the LCD during operation. I have changed the Adafruit PCD8. Nokia 5. 11. 0 LCD library to add this functionality. LCD printing with streaming operator lt lt With the Streaming library, we can use the streaming operator lt lt for printing to the console Serial lt lt hellon instead of Serial. Because the PCD8. Print we can also use the streaming operator lt lt for printing to the LCD. Here is an example include lt SPI. AdafruitGFX. h. AdafruitPCD8. Streaming. h. include lt Metro. PWMDACpin 9 PWM DAC, only pins 9 and 1. Nokia. SCLKpin 1. ISP. const byte Nokia. DNpin 1. 1 compatible with hardware ISP. Nokia. DCpin 1. Nokia. RESETpin 1. LCDcontrast 5. Stopwatch. h. Stopwatch stopwatchmicros. AdafruitPCD8. 54. Nokia. SCLKpin, Nokia. DNpin, Nokia. DCpin, 0, Nokia. RESETpin. Metro LCDinit. Timer2. 00. 0. void setupvoid. Serial. begin9. 60. ContrastLCDcontrast. Display. nokia lt lt Hellon without using F. FSave RAM with the Flash libraryn use F to save RAM space. Best. Contrast4. ContrastLCDcontrast. Display. nokia lt lt FLorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor lt lt i. LCDinit. Timer. check nokia. LCDcontrast allow disconnecting and connecting the LCD during execution. Serial lt lt stopwatch. Interval1 lt lt n test. Best. Contrastint contrast. Min, int contrast. Max, int delay. Min contrastlt contrast. Max contrast. Display. Contrastcontrast. F1. 23. 45. 67. F1. Bug n after 1. Fbla bla bla bla bla blan. Adjusting the contrast value. Installing Ncomputing. The contrast must be set separately for each LCD. With the function find. Best. Contrast, the correct contrast value can be determined. PCD8. 54. 4 library with hardware SPIThe library AdafruitPCD8. LCD by software SPI therefore the library is quite slow. In my example, writing the full LCD screen takes 3. Snigelen has created a hardware SPI PCD8. LCD elastomeric Zebra connector problem. Because the thin PCB warps by the pressure of the LCD, the Zebra connector often makes a bad contact. Pressing the LCD to the PCB by soldering a wire between them solves the contact problems Solving Nokia 5. LCD Zebra connector problem. Notes. Dont use n after a 1. Dont use endl, lt lt endl takes 6. The PCD8. 54. 4 LCD driver may be damaged if it is not properly reset.