![]() When you power on or reset the microcontroller, the code in the boot section runs first. The bootloader is some code that is stored in a special section of the flash memory on the ATmega32U4 microcontroller called the boot section. Here it is showing the fuse values on your Pro Micro:īootloader "etches" this all onto a new or empty chip There is also a neat online "fuse calculator" tool that you can use to check the results of fuse values as well as to calculate the fuse values for a desired configuration. You can get all the nitty gritty details about fuses from the datasheet. Regarding "should-be-permanent-firmware", there are a couple of fuses that could make it difficult to reprogram the chip (RSTDISBL, SPIEN), but that's certainly not all fuses are used for. Amount of flash memory reserved for the bootloader.There are a number of different things that are configured via fuses, including: However, you might be interested to know more about fuses just for the sake of learning: Fuses are used to configure the microcontroller. I'll provide instructions below.Ĭertain core files dictate USB and serial protocolsįuses are like "should-be-permanent-firmware" or somethingįirst of all, you don't need to worry about fuses for the sake of dealing with your current problem. Using Pro Micro (32u4), Uno as ISP.įor now, let's try to get it working without the Arduino as ISP. Unable to upload either via USB or Arduino as ISP. If someone could explain those error messages to me, it'd be greatly appreciated. I am willing to scrap this board and call it experience, but if there's something I can learn besides "don't eff with core files", that would be great. My understandings of bootloaders, corefiles, and fuses are this: from experience, certain core files dictate USB and serial protocols, fuses are like "should-be-permanent-firmware" or something, and bootloader "etches" this all onto a new or empty chip? Mostly over my head. The selected serial port avrdude: stk500_disable(): unknown response=0x12 does not exist or your board is not connected. Using Pro Micro (32u4), Uno as ISP.Īvrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x14 // Huh?Īvrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x01Īvrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x10ĭouble check connections and try again, or use -F to override this check. Actual result, disabled CDC serial functionality. ![]() Commented out a few lines of core code to disable RECOGNITION as CDC serial device.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |