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devices to program smd & bga devices based on a ARM and the 20pin demo board from hitex.
1. To have a LCD 4bit mode for smd & bga devices (on the 14pin & 20pin to use port 1) 2. plugin boards for relays or led display (using port 2) 3. on board Usb programmer or alternative
Or have you seen a cheap good ready built one anywhere.?
3. on board Usb programmer or alternative
I'm not sure which MCU you had in mind, but NXP has an great application note on creating a USB bootloader which can be used to flash their LPC1700 MCUs.
If no application is detected, or if a pin is held low, the bootloader will identify itself as a USB mass storage device. You can then drag your application (as a .bin file) onto the drive and it will run when you reset the MCU.
If your goal is to only program a device, it doesn't get much easier than this. It will not provide debug capability though.
www.nxp.com/.../LPC1700_secondary_USB_bootloader.zip