ATmega328P development board not working

Question

I've made a development board for ATmega328P like Arduino Uno.

Fig. 1 - schematic

Fig. 2 - bottom layer

Fig. 3 - top layer

I am able to upload the code using FTDI chip (I've used the chip which has boot loader in it). However the code is not working; I mean the LED connected to pin 14 is not blinking.

When I check the supply voltage at pin 7 I get 4.9 V, but when I check the same at GPIO it is giving 0.3 V.

I'm new to PCB designing. Please let me know what could have gone wrong.

void setup() {
   pinMode(14, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
    digitalWrite(14, HIGH);   // turn the LED on (HIGH is the voltage level)
    delay(1000);              // wait for a second
    digitalWrite(14, LOW);    // turn the LED off by making the voltage LOW
    delay(1000);              // wait for a second
}

Have you set the configuration bits? I guess the controller is not running. — Mike, Oct 20 '20 at 05:40
hello Mike yes, also even if i use the flased controller from uno . it will not work. — Anil Suha, Oct 20 '20 at 05:42
@Sanmvegsaini what is R5 then? ... looks like a pullup on the reset line to me — jsotola, Oct 20 '20 at 05:47
your code is wrong `pinMode(8, OUTPUT)` sets physical pin 14 of ATMEGA328 as output on Arduino UNO — jsotola, Oct 20 '20 at 05:53
ok let me try it out. is there any document for this please provide the link. — Anil Suha, Oct 20 '20 at 06:01
HI jsotola yessssssss the code is wrong.thank you very muchh. and please if you have any doc regarding this sendit to anilsuha831@gmail.com. thanks once again... — Anil Suha, Oct 20 '20 at 06:16

score 2 · Answer 1 · answered Dec 17 '20 at 22:54

The code is wrong because you are using the pin physical of the microcontroller like an Arduino pin. You need to review ATmega168/328P-Arduino Pin Mapping able on the Arduino web page

I recommend you to review the source code where these pins are defined pins_arduino.h - Pin definition functions for Arduino

ATmega328P development board not working

1 Answers1