I'm using avrdude to program my Arduino. My Ardunio Uno is from China and the programmer reported in the device manager is ch340.
When I first connect the arduino to my computer, avrdude works one time. All subsequent times it fails unless I unplug it from the computer and plug it back in. I tried putting a 10uF capacitor from RST to GND, it didn't help. I also tried a different configuration:
programmer
id = "ch340";
desc = "ttl port banging, reset=!txd sck=!rts mosi=!dtr miso=!cts (invert signals using 74ls04)";
type = serbb;
reset = 3;
sck = 4;
mosi = 8;
miso = 7;
;
That also didn't help. With either of those solutions, I couldn't even get it to work the first time. Only with programmer "arduino" did I get it to work, but then only once.
Here is the output from the first run after connecting to USB:
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.00s
avrdude: Device signature = 0x1e950f
avrdude: safemode: Fuses OK
avrdude done. Thank you.
All runs after that:
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51
avrdude done. Thank you.
I also tried the reset button the board, it didn't make a difference.
