Hi everybody,
Can you help me programming arduino break boad with Rs232.
I'm do as tutorial in here:
http://mayaptrungminhhai.com/nap-arduino-voi-pl2303-usb-to-rs-232/
But not ok. I think i have make misstake in step. I have new atmega328 and connect break boad with,16Mhz crystal, 22pF capacitor, and pull-up resistor 10kOhm to reset.
Can you help me!
I think Atmega328 need Burn bootloader? Do you think the same with me?
Please help me!
Firstly, you are referring to "RS-232" when it is clear from the site you reference that you are using a USB adapter which has nothing whatsoever to do with the RS-232 standard.
I suggest you use Nick Gammon's tutorials as a more adequate reference.
If you purchased an ATmega328 on its own, unless it was sold with the bootloader loaded (and you cannot entirely trust claims that it was in fact loaded), then it presumably does not have the bootloader loaded and you will therefore have to use the ISP method to install the bootloader. I note you already have other Arduinos in use so should be able to use one of them.
Incidentally, most assembled boards a sold will have the bootloader and a "blink" sketch loaded which if you connect the crystal and power correctly, will blink a LED connected with a resistor to port pin 13 (chip pin 13).
You could build an actual RS 232 programmer for cheap and use it to program your Atmega.
Be aware you will need an actual serial port, USB to serial adapters don't always work.
somedude:
Be aware you will need an actual serial port, USB to serial adapters don't always work.
Perhaps you had better explain if there are any genuine reasons why they would not work?
If you do not know, you need to retract that assertion.
I also don't understand what you want.
Do you want to connect an Arduino to a computer that has serial port or do you want to connect an Arduino's serial port to a USB port?
It is possible to connect an Arduino to an RS232 port (a typical "serial" port on older computers), but you need a specialized IC (like the MAX3323), as described here:
You can also program the Arduino using the same approach. Once such (but simpler) example is the Arduino S3v3rino (https://www.arduino.cc/en/Main/ArduinoBoardSerialSingleSided3)
Paul__B:
Perhaps you had better explain if there are any genuine reasons why they would not work?If you do not know, you need to retract that assertion.
I am sorry, your Honor, she told me she was 18!
somedude:
I am sorry, your Honour, she told me she was 18!
I rest my case.