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The microcontroller ATSAMD21G18A-MUT was connected to a Atmel dubugger through SAM_Probe connection through the SWD interface, When checked for detection of microcontroller on the microchip studios it showed that the board is locked or in a deep sleep mode. So any experts having an idea on unlocking the microcontrollers please share it.
Dec 22, 2017 · I get this error while trying to bootload the ATMEGA328P-AU chip using the Arduino Nano and programmer Arduino as ISP... Arduino: 1.6.9 (Windows 8.1), Board: "Arduino Nano, ATmega328".
The ATmega microcontrollers generally have two lock bits, LB1 and LB2. One prevents further programming, and the other prevents the flash being read back. If both are set, the chip needs to be erased before it can be programmed again.
Mar 26, 2022 · I have previously documented how to do this for AVR microcontrollers/Arduino: How do I force atomicity in Atmel AVR mcus/Arduino?. But, how do I do this for STM32 microcontrollers? I know there are a lot of ways. Please cover the following techniques: Via ARM-core CMSIS: for global interrupts; for specific IRQs (Interrupt Requests)
To clear the Lock bits, a complete Chip Erase is required, which erase the Flash memory. These 2 lock bits alone (LB1 and LB2) when low will prevent 99.9% of people from stealing your firmware! Probably more than 99.9%. It would almost always be easier to reverse engineer your code.
Apr 13, 2008 · If you get your AVR fuse bits set wrong you can no longer access the chip unless you remember (or know) exactly what change you made. You have to rebuild your circuit so it matches the change and then you can reprogram it.
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May 7, 2020 · I want to flash custom firmware into devices that use Atmega chip like an ESC (speed controller) but before i do that, i want to make a 100% backup of the entire chip (in case there’s a problem and i want to restore it) maybe as a hex file. How can i do that, and which hardware do i need?
