Gettin' A Little Shifty

摘要

Last month, we finished looking at the AVR memory architecture and wrote a bootloader that lets us upload programs to an AVR without having an external programmer. One of the things we learned in the memory series is that the AVR was designed around Flash EEPROM for program memory. Flash memory is great stuff and you probably have a few billion bytes of it in the form of media cards sitting around in odd places like your cell phone, digital camera, or music player.