One of the videos linked above seems to indicate that we can check for the possible need for the mod by confirming that there is 5V on the data pins. It is in SPI programming mode with the jumper bridging Quote from: fudmuffin on July 15, , am. CHA voltages-. Quote from: jakeisprobably on July 14, , am.
Quote from: pupa on July 15, , pm. Quote from: fudmuffin on July 15, , pm. Quote from: pupa on July 16, , am. Do you read approximate 3v3 to 3.
Quote from: fudmuffin on July 16, , am. Quote from: jakeisprobably on July 16, , pm. PostNubila Newbie Posts: 4 Country:. This is my mod of the CHA. I change it to 3. Documentation can be downloaded from the download area , or read online here. Dean as a private project of an in-system programmer for the Atmel AVR microcontroller series, as part of the Opensource and free software tools collection available for these controllers.
Originally, the software was written for the FreeBSD operating system , maintained in a private CVS repository, and distributed under the name avrprog. Due to the growing interest in porting the software to other operating systems, Brian decided to make the project publically accessible on savannah. And if you don't like an existing method, you can replace it with your improved version:.
Quote: After all, you probably want to preserve your 'data' over several builds and even platforms. Quote: Untested. I am still learning. But also note that you probably want overloaded versions for all stdint. This is why I said the template solution I linked to may be "better" because one piece of code fits all. It took me a bit of time to get my head around templates I'm still learning but they are a bit like a "super macro" and each invocation just replaces the T type with the type of the passed object.
So rather than the over-loaded solution:. I took a class once back in the last millenium. My c compiler has macros to read and write any size var to eeprom. Why should I have thought that I could actually load the eeprom? Skip to main content. Avrdude and eeprom? Log in or register to post comments. Go To Last Post. If your chip is being clocked very slowly you'll need to talk slowly to it to let it keep up. It'll be discussed later, for now don't use it.
We don't want that so don't use this command switch. The test is strongly recommended as it tests the connection, so don't use this switch.
Its the one that actually does the programming. We will always be using "Intel Hex" format, so use i So, for example. If you wanted to write the file test. If you wanted to read the eeprom memory into the file "eedump. We want to verify when we write to flash so don't use this. Don't use this, it is confusing to beginners. If you want you can use it, but in general we won't. In general we won't use it but maybe after a while you wold like to. Let's review them in more detail.
You can leave this off for writing, but for reading use i for Intel Hex the prevailing standard For example: To write a file called firmware. OK enough of this jibber-jabber.
Its time to program the firmware into a chip! Avrdude should go through the following steps: Initializing the programmer you wont see this if it works Initializing the AVR device and making sure its ready for instructions Reading the device signature 0x1ea which confirms that the chip you specified in the command line attiny is in fact the chip that the programmer is connected to Erasing the chip Reading the file and verifying its a valid file Writing the flash Verifying the flash.
For example to set the high fuse to 0xDA: avrdude -c usbtiny -p attiny -U hfuse:w:0xDA:m Setting the fuses incorrectly can 'brick' the chip - for example you can disable future programming, or make it so the chip is expecting an external crystal when there isn't one. Remember: once you set the fuses you do not have to set them again.
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