is this an error most likely due to memory?
Format must be BMP, 24 bit colour. Their sample image of a daffodil is 96 x 64 pixels (required) and weighs in at just over 18KB, the Arduino Mega v3 has 8 KB SRAM memory. It also has Flash Ram available, 248 KB free.
Thanks for the help, it works, but it's a little crooked how to lower the picture down and how to make the background black
kod:
#include <Adafruit_ST7735.h>
#include <Adafruit_GFX.h>
#include <SPI.h>
#define TFT_CS 10
#define TFT_RST 9
#define TFT_DC 8
#define TFT_SCLK 52
#define TFT_MOSI 51
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_RST);
const uint16_t evive_in_hand[] PROGMEM ={
0x0020, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0020, 0x0020, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000};
void setup(){
tft.initR(INITR_BLACKTAB);
tft.setRotation(3);
tft.fillScreen(ST7735_BLACK);
}
void loop(){
int h = 80,w = 160, row, col, buffidx=0;
for (row=0; row<h; row++) { // For each scanline...
for (col=0; col<w; col++) { // For each pixel...
//To read from Flash Memory, pgm_read_XXX is required.
//Since image is stored as uint16_t, pgm_read_word is used as it uses 16bit address
tft.drawPixel(col, row, pgm_read_word(evive_in_hand + buffidx));
buffidx++;
} // end pixel
}
}