Hi there, I am trying to get text to display on this LCD however it always displays a strange symbol instead of proper text and I cannot figure out why this would be.
I am using the ERM19264_UC1609 library on an Arduino Nano Clone. I believe all my connections should be correct as it works fine on any other example files such as the bitmap one. But the text does not seem to work.
I have tried to connect it with Hardware SPI and Software SPI with the same results on both. I have also tried different Arduino Nano boards and different defined pins with no change. I am also just using the default example sketch.
If anyone could give me a suggestion to fix that would be great, thank you!
Symbols instead of text displayed:
Example code:
/*!
@file ERM19264_UC1609_SWSPI.ino
@brief Example file for ERM19264_UC1609 library, showing use of software SPI mode
only difference for user is the constructor used when you instantiate the object and pin definations
@author Gavin Lyons
@details
<https://github.com/gavinlyonsrepo/ERM19264_UC1609>
@note
-# (1) GPIO is for arduino UNO for other tested MCU see readme.
-# (2) This is for software SPI for hardware SPI see all other examples.
@test
-# 601 Software SPI
*/
#include <ERM19264_UC1609.h>
// LCD setup
// GPIO 5-wire SPI interface
#define CD 10 // GPIO pin number pick any you want
#define RST 9 // GPIO pin number pick any you want
#define CS 8 // GPIO pin number pick any you want
#define SCLK 13 // GPIO pin number pick any you want
#define DIN 11 // GPIO pin number pick any you want
// SW SPI GPIO delay uS. May have to be increased for high freq CPU, 0 by default.
uint16_t SW_SPI_GPIO_Delay = 0 ;
#define LCDCONTRAST 0x49 // contrast: Range 0-0xFE, optional, default 0x49
#define LCDRAMADDRCTRL 0x02 // RAM address control: Range 0-0x07, optional, default 0x02
#define MYLCDHEIGHT 64
#define MYLCDWIDTH 192
#define FULLSCREEN (MYLCDWIDTH * (MYLCDHEIGHT/8)) // 1536 bytes
// define a buffer to cover whole screen
uint8_t screenBuffer[FULLSCREEN];
// define a buffer to cover whole screen
uint8_t fullScreenBuffer[(MYLCDWIDTH * (MYLCDHEIGHT/8))]; // 1536 bytes
// instantiate object pick any GPIO you want
ERM19264_UC1609 mylcd(MYLCDWIDTH , MYLCDHEIGHT, CD, RST, CS, SCLK, DIN );
// Instantiate a screen object, in this case to cover whole screen
ERM19264_UC1609_Screen fullScreen(fullScreenBuffer, MYLCDWIDTH, MYLCDHEIGHT, 0, 0);
// Varibles to control test timing
long startTime ; // start time for stop watch
long elapsedTime ; // elapsed time for stop watch
// ************* SETUP ***************
void setup() {
delay(50);
mylcd.LCDbegin(LCDCONTRAST, LCDRAMADDRCTRL); // initialize the LCD
mylcd.LCDFillScreen(0x00, 0); // Clear the screen
startTime = millis();
mylcd.LCDHighFreqDelaySet(SW_SPI_GPIO_Delay);
}
// ************** MAIN LOOP ***********
void loop() {
// Call a function to display text
DisplayText();
}
// ************** END OF MAIN ***********
void DisplayText()
{
int count = 0;
mylcd.setTextColor(FOREGROUND);
mylcd.setTextSize(1);
mylcd.ActiveBuffer = &fullScreen;
mylcd.LCDclearBuffer(); // Clear the buffer
while (1)
{
mylcd.LCDclearBuffer();
mylcd.setCursor(20, 10);
mylcd.print(F("Software SPI speed test"));
mylcd.setCursor(20, 30);
mylcd.print(mylcd.LCDHighFreqDelayGet());
mylcd.setCursor(20, 50);
if (count < 1000)
{
mylcd.print(count);
} else
{
elapsedTime = millis() - startTime;
mylcd.print("Time Taken:");
mylcd.print(elapsedTime / 1000L);
}
delay(1);
mylcd.LCDupdate(); // Write to the buffer
if (count == 1000)
{
while (1) {
delay(1000);
}; //test finished
}
count ++;
}
}
Bitmap Example Sketch - Works fine?:
