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I have an ATmeg328 TQFP on a board (in system). I use an Arduino Uno as an ISP to programm the chip. However, i would like to use Serial Communication with the chip through the Arduino board.
EDIT: i have the tx and RX pins not available. The chip is on a board. With through arduino board, I mean that I would like to use the miso mosi sck pins to do this. |
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Just burn the arduino bootloader to your tqfp. Then connect the tx and rx on the tqfp to the tx and rx on your arduino, and pull the reset line on the arduino low. Downside is you have to do a manual reset on the tqfp before programming. If you have an Uno you could remove the atmega from the socket, and connect the reset on the uno to the reset on the tqfp. Another option is to connect the TX on the tqfp to the TX pin on the Arduino using a resistor. But for this to work you have to modify the ArduinoISP sketch to make it release TX pin ( |
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