Here is an example from the library for the 64x64 led display. Tell me where in this example is there a refresh call necessary?
// testshapes demo for RGBmatrixPanel library.
// Demonstrates the drawing abilities of the RGBmatrixPanel library.
// For 64x64 RGB LED matrix.
// WILL NOT FIT on ARDUINO UNO -- requires a Mega, M0 or M4 board
#include "RGBmatrixPanel.h"
#include "bit_bmp.h"
#include "fonts.h"
#include <string.h>
#include <stdlib.h>
// Most of the signal pins are configurable, but the CLK pin has some
// special constraints. On 8-bit AVR boards it must be on PORTB...
// Pin 11 works on the Arduino Mega. On 32-bit SAMD boards it must be
// on the same PORT as the RGB data pins (D2-D7)...
// Pin 8 works on the Adafruit Metro M0 or Arduino Zero,
// Pin A4 works on the Adafruit Metro M4 (if using the Adafruit RGB
// Matrix Shield, cut trace between CLK pads and run a wire to A4).
//#define CLK 8 // USE THIS ON ADAFRUIT METRO M0, etc.
//#define CLK A4 // USE THIS ON METRO M4 (not M0)
#define CLK 11 // USE THIS ON ARDUINO MEGA
#define OE 9
#define LAT 10
#define A A0
#define B A1
#define C A2
#define D A3
#define E A4
RGBmatrixPanel matrix(A, B, C, D, E, CLK, LAT, OE, false, 64);
//Configure the serial port to use the standard printf function
void setup()
{
Serial.begin(115200);
matrix.begin();
delay(500);
}
void loop()
{
// Do nothing -- image doesn't change
Demo_0();
Demo_1();
Demo_2();
}
//Clear screen
void screen_clear()
{
matrix.fillRect(0, 0, matrix.width(), matrix.height(), matrix.Color333(0, 0, 0));
}
void Demo_0()
{
// draw a pixel in solid white
screen_clear();
matrix.setFont(NULL);
matrix.drawPixel(0, 0, matrix.Color333(7, 7, 7));
delay(500);
matrix.fillRect(0, 0, matrix.width(), matrix.height(), matrix.Color333(0, 7, 0));
delay(500);
matrix.drawRect(0, 0, matrix.width(), matrix.height(), matrix.Color333(7, 7, 0));
delay(500);
// draw an 'X' in red
matrix.drawLine(0, 0, matrix.width()-1, matrix.height()-1, matrix.Color333(7, 0, 0));
matrix.drawLine(matrix.width()-1, 0, 0, matrix.height()-1, matrix.Color333(7, 0, 0));
delay(500);
// draw a blue circle
matrix.drawCircle(10, 10, 10, matrix.Color333(0, 0, 7));
delay(500);
// fill a violet circle
matrix.fillCircle(40, 21, 10, matrix.Color333(7, 0, 7));
delay(500);
// fill the screen with 'black'
screen_clear();
// draw some text!
matrix.setTextSize(1); // size 1 == 8 pixels high
matrix.setTextWrap(false); // Don't wrap at end of line - will do ourselves
matrix.setCursor(5, 0); // start at top left, with 8 pixel of spacing
uint8_t w = 0;
char *str = "WaveshareElectronics";
for (w=0; w<9; w++) {
matrix.setTextColor(Wheel(w));
matrix.print(str[w]);
}
matrix.setCursor(0, 8); // next line
for (w=9; w<20; w++) {
matrix.setTextColor(Wheel(w));
matrix.print(str[w]);
}
matrix.println();
//matrix.setTextColor(matrix.Color333(4,4,4));
//matrix.println("Industries");
matrix.setTextColor(matrix.Color333(7,7,7));
matrix.println("RGB MATRIX!");
// print each letter with a rainbow color
matrix.setTextColor(matrix.Color333(7,0,0));
matrix.print('6');
matrix.setTextColor(matrix.Color333(7,4,0));
matrix.print('4');
matrix.setTextColor(matrix.Color333(7,7,0));
matrix.print('x');
matrix.setTextColor(matrix.Color333(4,7,0));
matrix.print('6');
matrix.setTextColor(matrix.Color333(0,7,0));
matrix.print('4');
matrix.setCursor(40, 24);
matrix.setTextColor(matrix.Color333(0,4,7));
matrix.print('R');
matrix.setTextColor(matrix.Color333(0,0,7));
matrix.print('G');
matrix.setTextColor(matrix.Color333(4,0,7));
matrix.print('B');
matrix.setCursor(5, 32); // start at middle left, with 8 pixel of spacing
for (w=0; w<9; w++) {
matrix.setTextColor(Wheel(w));
matrix.print(str[w]);
}
matrix.setCursor(0, 40); // next line
for (w=9; w<20; w++) {
matrix.setTextColor(Wheel(w));
matrix.print(str[w]);
}
matrix.println();
//matrix.setTextColor(matrix.Color333(4,4,4));
//matrix.println("Industries");
matrix.setTextColor(matrix.Color333(7,7,7));
matrix.println("LED MATRIX!");
// print each letter with a rainbow color
matrix.setTextColor(matrix.Color333(7,0,0));
matrix.print('6');
matrix.setTextColor(matrix.Color333(7,4,0));
matrix.print('4');
matrix.setTextColor(matrix.Color333(7,7,0));
matrix.print('x');
matrix.setTextColor(matrix.Color333(4,7,0));
matrix.print('6');
matrix.setTextColor(matrix.Color333(0,7,0));
matrix.print('4');
matrix.setCursor(40, 56);
matrix.setTextColor(matrix.Color333(0,4,7));
matrix.print('R');
matrix.setTextColor(matrix.Color333(0,0,7));
matrix.print('G');
matrix.setTextColor(matrix.Color333(4,0,7));
matrix.print('B');
delay(2000);
}
// Input a value 0 to 7 to get a color value.
// The colours are a transition r - g - b - back to r.
uint16_t Wheel(byte WheelPos) {
if(WheelPos < 8) {
return matrix.Color333(7 - WheelPos, WheelPos, 0);
} else if(WheelPos < 16) {
WheelPos -= 8;
return matrix.Color333(0, 7-WheelPos, WheelPos);
} else {
WheelPos -= 16;
return matrix.Color333(WheelPos, 0, 7 - WheelPos);
}
}
/* @name : display_Image
* @brief: display an image
* The image data is in the "bit_bmp.h"
* You can use some tools to get the image data
* You can set the data bits which is 8 or 16 and set the MSB first which is true or false on line 1001 of Adafruit_GFX.c
* @param: x Top left corner x coordinate
* y Top left corner y coordinate
* bitmap byte array with 16-bit color bitmap,the image data is in the "bit_bmp.h"
* w Width of bitmap in pixels
* h Height of bitmap in pixels
* @retval: None
*/
void display_Image(int16_t x, int16_t y, const uint16_t bitmap[],int16_t w, int16_t h)
{
matrix.display_image(x, y, bitmap, w, h);
}
#include "Fonts/FreeSerif9pt7b.h"
#include "Fonts/FreeSerifBoldItalic9pt7b.h"
#include "Fonts/RobotoMono_Thin7pt7b.h"
#include "Fonts/FreeSans9pt7b.h"
/* @name : display_text
* @brief: display a text string
* @param: x X coordinate in pixels
* y Y coordinate in pixels
* *str Text string
* *f Text font,if you use the default font,the value will be NULL,
* if you use other font ,you should add header file of font to folder named “Fonts” like this Demo
* color 16-bit 5-6-5 Color to draw text with
* pixels_size Desired text size. 1 is default 6x8, 2 is 12x16, 3 is 18x24, etc
*
* @retval: None
*/
void display_text(int x, int y, char *str, const GFXfont *f, int color, int pixels_size)
{
matrix.setTextSize(pixels_size);// size 1 == 8 pixels high
matrix.setTextWrap(false); // Don't wrap at end of line - will do ourselves
matrix.setFont(f); //set font
matrix.setCursor(x, y);
matrix.setTextColor(color);
matrix.println(str);
}
void Demo_1()
{
screen_clear();
display_text(-1, 14, "R", &FreeSerif9pt7b, matrix.Color333(7, 0, 0), 1);
display_text(8 , 14, "G", &FreeSerif9pt7b, matrix.Color333(0, 7, 0), 1);
display_text(19, 14, "B", &FreeSerif9pt7b, matrix.Color333(0, 0, 7), 1);
display_text(31, 5, "m", NULL, 0x7800, 1);
display_text(37, 5, "a", NULL, 0xFFE0, 1);
display_text(42, 5, "t", NULL, 0x07E0, 1);
display_text(48, 5, "r", NULL, 0X001F, 1);
display_text(53, 5, "i", NULL, 0x07FF, 1);
display_text(58, 5, "x", NULL, 0x780F, 1);
display_text(-1, 30, "P2",&RobotoMono_Thin7pt7b, 0xFFE0, 1);
display_text(12, 25, ".",NULL, 0xFFE0, 1);
display_text(21, 30, "6",&FreeSerifBoldItalic9pt7b , 0x780F, 1);
display_text(29, 30, "4",&FreeSerifBoldItalic9pt7b , 0x780F, 1);
display_text(38, 30, "x",&FreeSans9pt7b , 0x780F, 1);
display_text(46, 30, "6",&FreeSerifBoldItalic9pt7b , 0x780F, 1);
display_text(54, 30, "4",&FreeSerifBoldItalic9pt7b , 0x780F, 1);
display_text(-1, 14+32, "R", &FreeSerif9pt7b, matrix.Color333(7, 0, 0), 1);
display_text(8 , 14+32, "G", &FreeSerif9pt7b, matrix.Color333(0, 7, 0), 1);
display_text(19, 14+32, "B", &FreeSerif9pt7b, matrix.Color333(0, 0, 7), 1);
display_text(31, 5+32, "M", NULL, 0x7800, 1);
display_text(37, 5+32, "a", NULL, 0xFFE0, 1);
display_text(42, 5+32, "t", NULL, 0x07E0, 1);
display_text(48, 5+32, "r", NULL, 0X001F, 1);
display_text(53, 5+32, "i", NULL, 0x07FF, 1);
display_text(58, 5+32, "x", NULL, 0x780F, 1);
display_text(-1, 30+32, "P2",&RobotoMono_Thin7pt7b, 0xFFE0, 1);
display_text(12, 25+32, ".",NULL, 0xFFE0, 1);
display_text(21, 30+32, "6",&FreeSerifBoldItalic9pt7b , 0x780F, 1);
display_text(29, 30+32, "4",&FreeSerifBoldItalic9pt7b , 0x780F, 1);
display_text(38, 30+32, "x",&FreeSans9pt7b , 0x780F, 1);
display_text(46, 30+32, "6",&FreeSerifBoldItalic9pt7b , 0x780F, 1);
display_text(54, 30+32, "4",&FreeSerifBoldItalic9pt7b , 0x780F, 1);
delay(2000);
display_Image(0, 0, gImage_image, 64, 64);
delay(2000);
}
void Demo_2()
{
screen_clear();
matrix.DrawString_CN( 1 , 12, "微", &Font16CN, matrix.Color333(7, 0, 0));
matrix.DrawString_CN( 1+16, 12, "雪", &Font16CN, matrix.Color333(6, 1, 0));
matrix.DrawString_CN( 1+32, 12, "电", &Font16CN, matrix.Color333(5, 2, 7));
matrix.DrawString_CN( 1+48, 12, "子", &Font16CN, matrix.Color333(0, 7, 0));
matrix.DrawString_CN( 1 ,35, "欢", &Font16CN, matrix.Color333(0, 6, 1));
matrix.DrawString_CN( 1+16, 35, "迎", &Font16CN, matrix.Color333(0, 5, 2));
matrix.DrawString_CN( 1+32, 35, "您", &Font16CN, matrix.Color333(0, 0, 7));
matrix.DrawString_CN( 1+48, 35, "！", &Font16CN, matrix.Color333(1, 0, 6));
delay(2000);
screen_clear();
matrix.DrawString_CN( 1 , 0, "微", &Font32CN, matrix.Color333(0, 7, 7));
matrix.DrawString_CN( 1+32, 0, "雪", &Font32CN, matrix.Color333(0, 7, 7));
matrix.DrawString_CN( 1 , 32,"电", &Font32CN, matrix.Color333(0, 7, 7));
matrix.DrawString_CN( 1+32, 32,"子", &Font32CN, matrix.Color333(0, 7, 7));
delay(2000);
screen_clear();
matrix.DrawString_CN( 1 , 0, "欢", &Font32CN, matrix.Color333(0, 7, 7));
matrix.DrawString_CN( 1+32, 0, "迎", &Font32CN, matrix.Color333(0, 7, 7));
matrix.DrawString_CN( 1 , 32,"您", &Font32CN, matrix.Color333(0, 7, 7));
matrix.DrawString_CN( 1+37, 32,"！", &Font32CN, matrix.Color333(0, 7, 7));
delay(2000);
screen_clear();
matrix.DrawString_CN( 0, 0, "微", &Font64CN, matrix.Color333(7, 0, 0));
delay(1000);
screen_clear();
matrix.DrawString_CN( 0, 0, "雪", &Font64CN, matrix.Color333(0, 7, 0));
delay(1000);
screen_clear();
matrix.DrawString_CN( 0, 0, "电", &Font64CN, matrix.Color333(0, 0, 7));
delay(1000);
screen_clear();
matrix.DrawString_CN( 0, 0, "子", &Font64CN, matrix.Color333(7, 7, 7));
delay(1000);
screen_clear();
matrix.DrawString_CN( 0, 0, "欢", &Font64CN, matrix.Color333(7, 5, 0));
delay(1000);
screen_clear();
matrix.DrawString_CN( 0, 0, "迎", &Font64CN, matrix.Color333(0, 7, 5));
delay(1000);
screen_clear();
matrix.DrawString_CN( 0, 0, "您", &Font64CN, matrix.Color333(5, 0, 7));
delay(1000);
screen_clear();
matrix.DrawString_CN( 13, 0, "！", &Font64CN, matrix.Color333(7, 7, 7));
delay(2000);
screen_clear();
}