I have developed a ATmega328p-based device that I order assembled from a well-known Chinese fab house, but they do not do chip programming. I have built these in runs of 10s and just programmed them using the "Arduino as ISP" sketch and a set of pogo pins reasonably well. I am now scaling up to 100s of devices and want to reduce the monotony and strain of this process. I would like to set up a standalone jig to burn my bootloader and program the device. Is there a way to modify the "Arduino as ISP" sketch to burn a pre-defined bootloader instead of requiring input from my computer? Ideally I would put the new device in the jig with a microswitch to trigger the programming and then continue to the next board. Right now I have to click a few buttons on my laptop for each device.
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