Help with ATMEGA328P-AU barebones board

Other Hardware 3rd Party Boards
1

hi there
i just built a barebones board with the above processor im just before i start im just wondering if this chip has the bootlader installed at the factory? ive tryed to load a sketch to it using the nano 328 which didnt work is that the correct one to use ?
thank you

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2

Chips do not have bootloader installed by the factory.
Got a schematic of the complete "system"?
Nano would be a good choice for 5V/16MHz.
Or a Promini. Select 3.3V/8MHz or 5V/16MHz
Or an Uno if you weren't using A6/A7 (analog inputs only) and 5V/16MHz.
All require external crystal.

3

hi robert
thanks for having a look, i think i have spotted my error i think my mosi, and miso were connected wrong going to give it a go in a min
thanks

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4

jonwhite:
hi robert
thanks for having a look, i think i have spotted my error i think my mosi, and miso were connected wrong going to give it a go in a min
thanks

I assume you have an SPI programmer? Perhaps an UNO running ArduinoISP?
Bootloaders are "optional" ... Using ISP programmer, no boot loader is required, but fuse settings are always a must! Burn bootloader from the Arduino GUI will install boot loader and set fuses if you select UNO as your board type.

5

hi there
UNO running ArduinoISP, im not having much luck, just had a look at nicks bootloader explanation it looka a bit out of date? as i cant see the nano anywhere the chip im trying to bootload ATMEGA328P-AU, cheers

6

jonwhite:
hi there
UNO running ArduinoISP, im not having much luck, just had a look at nicks bootloader explanation it looka a bit out of date? as i cant see the nano anywhere the chip im trying to bootload ATMEGA328P-AU, cheers

Both the Nano and MiniPro have -AU chips. The boards.txt & pins_arduino.h files complete the profile. Grab from Sparkfun if you must.

Ray

7

Do not cross MISO to MOSI during programming.
All header pins connect 1-1, with Reset broken out and connected to master's D10.

8

thanks for the help, not having much luck running ArduinoISP checked setup many time, ive just ordered a USBISP AVR Programmer, hopefully have more luck with that,
thank you

9

CrossRoads:
Do not cross MISO to MOSI during programming.
All header pins connect 1-1, with Reset broken out and connected to master's D10.

Sounds like Ghostbusters...