Very odd quirk and a new one for me.
Wired up a brand new 18M2+ with the precise download hardware I've always used... Prolific USB to serial converter, and standard serial download circuit -- GND, RxD from pin 2, TxD to the two resistors... 10K to ground, 22K to pin 3.
Neither LinAxePad or the command line Linux compiler would recognize the hardware.
I knew the receive (serial OUT) side was good, because I got the scrolling "Hello" message on the terminal.
So clearly a problem on the transmit (serial IN) side.
Put an LED and dropping resistor on pin 3, and could clearly see the signal attempt show up when initiating a download... but still, hardware not found.
So on a hunch, I reduced the current limiting resister from 22K to 10K and behold, it worked like a charm. I know everybody swears by the 10K/22K combination across the board, and it has worked for me before, but this change is what enabled the download to work in this case.
Reproduced the exact behavior with another brand new 18M2+ as well.
Anyone else ever experience this?
Wired up a brand new 18M2+ with the precise download hardware I've always used... Prolific USB to serial converter, and standard serial download circuit -- GND, RxD from pin 2, TxD to the two resistors... 10K to ground, 22K to pin 3.
Neither LinAxePad or the command line Linux compiler would recognize the hardware.
I knew the receive (serial OUT) side was good, because I got the scrolling "Hello" message on the terminal.
So clearly a problem on the transmit (serial IN) side.
Put an LED and dropping resistor on pin 3, and could clearly see the signal attempt show up when initiating a download... but still, hardware not found.
So on a hunch, I reduced the current limiting resister from 22K to 10K and behold, it worked like a charm. I know everybody swears by the 10K/22K combination across the board, and it has worked for me before, but this change is what enabled the download to work in this case.
Reproduced the exact behavior with another brand new 18M2+ as well.
Anyone else ever experience this?