Help Wiring Adafruit 1.8" TFT LCD and 1284p standalone project
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Help Wiring Adafruit 1.8" TFT LCD and 1284p standalone project

by uno23 on Sat Nov 10, 2012 3:34 pm

Hi all, I try to use 1.8" 18-bit color TFT LCD display
http://adafruit.com/products/358

with my breadboard 1284p project

So I wired
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Gnd          --> GND
VCC          --> 5v
RESET      --> D0
D/C          --> D3
CARDCS    --> NONE
TFTCS      --> D4
MOSI        --> D5
SCK         --> D7
MISO        --> NONE
LITE        --> VCC



this is the pin mapping for 1284p


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// ATMEL ATMEGA1284P
//
//                   +---\/---+
//           (D 0) PB0  1|        |40  PA0 (AI 0 / D24)
//           (D 1) PB1  2|        |39  PA1 (AI 1 / D25)
//      INT2 (D 2) PB2  3|        |38  PA2 (AI 2 / D26)
//       PWM (D 3) PB3  4|        |37  PA3 (AI 3 / D27)
//    PWM/SS (D 4) PB4  5|        |36  PA4 (AI 4 / D28)
//      MOSI (D 5) PB5  6|        |35  PA5 (AI 5 / D29)
//  PWM/MISO (D 6) PB6  7|        |34  PA6 (AI 6 / D30)
//   PWM/SCK (D 7) PB7  8|        |33  PA7 (AI 7 / D31)
//                 RST  9|        |32  AREF
//                 VCC 10|        |31  GND
//                 GND 11|        |30  AVCC
//               XTAL2 12|        |29  PC7 (D 23)
//               XTAL1 13|        |28  PC6 (D 22)
//      RX0 (D 8)  PD0 14|        |27  PC5 (D 21) TDI
//      TX0 (D 9)  PD1 15|        |26  PC4 (D 20) TDO
// RX1/INT0 (D 10) PD2 16|        |25  PC3 (D 19) TMS
// TX1/INT1 (D 11) PD3 17|        |24  PC2 (D 18) TCK
//      PWM (D 12) PD4 18|        |23  PC1 (D 17) SDA
//      PWM (D 13) PD5 19|        |22  PC0 (D 16) SCL
//      PWM (D 14) PD6 20|        |21  PD7 (D 15) PWM
//                   +--------+
//



and i use adafruit labrary with this code...


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#define cs   4
#define dc   3
#define rst   0

#include <Adafruit_GFX.h>
#include <Adafruit_ST7735.h>
#include <SPI.h>

Adafruit_ST7735 tft = Adafruit_ST7735(cs,dc,rst);

and I try with the example graphictest_highspeed




But unfortunately the display is white totally illuminated.
upload code is via a programmer. And the sketch is uploaded correctly. I modified the code to add in the loop a blinking LED and it works. Any idea? Where am I doing wrong? thanks

best regards

Marco
uno23
 
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Re: Help Wiring Adafruit 1.8" TFT LCD and 1284p standalone project

by uno23 on Mon Nov 12, 2012 5:45 pm

This evening I tried to connect the display with arduino one following the tutorial step by step ..... but the result is the same the display appears all white :cry: :cry:

http://learn.adafruit.com/1-8-tft-display/connecting-the-display

Could it be broken? Mistake or something fundamental? But I followed the tutorial like a monkey :lol:
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Re: Help Wiring Adafruit 1.8" TFT LCD and 1284p standalone project

by adafruit_support_rick on Mon Nov 12, 2012 9:17 pm

Please post detailed photos of your wiring. On the Uno, are you running one of the standard adafruit example sketches?

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Re: Help Wiring Adafruit 1.8" TFT LCD and 1284p standalone project

by uno23 on Tue Nov 13, 2012 3:17 am

Many thanks for you reply.
Yes I use the example in the library graphictest:
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// You can use any (4 or) 5 pins
#define sclk 4
#define mosi 5
#define cs   6
#define dc   7
#define rst  8  // you can also connect this to the Arduino reset

#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library
#include <SPI.h>

// Option 1: use any pins but a little slower
Adafruit_ST7735 tft = Adafruit_ST7735(cs, dc, mosi, sclk, rst);


I attach in the photo how i have wired the dispaly with lcd.
Attachments
ArduinoUnoWiring2.JPG
ArduinoUnoWiring2.JPG (135.58 KiB) Viewed 584 times
ArduinoUnoWiring2.JPG
ArduinoUnoWiring2.JPG (135.58 KiB) Viewed 584 times
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Re: Help Wiring Adafruit 1.8" TFT LCD and 1284p standalone project

by adafruit_support_bill on Tue Nov 13, 2012 6:50 am

We've had some problems with that library. Get the latest version (posted yesterday) and give it another try.
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Re: Help Wiring Adafruit 1.8" TFT LCD and 1284p standalone project [Solved]

by uno23 on Tue Nov 13, 2012 5:33 pm

Great! It's work! I have tried with uno and also with 1284p both configuration work very fine!

thanks all!

best regards

Marco
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