Comments (2)
I found out that reading/writing the USERROW is possible using normal read/write (-r/-w) arguments, but the chip must be in programming mode in order for the read/write to succeed.
ie. ./cupdi -c /dev/ttyUSB0 -d tiny3217 -v 6 -u --read="1300:64"
I missed this part in the datasheet:
Section 6.6 User Row: The CPU can write and read this memory as normal EEPROM and the UPDI can write and read it as a normal EEPROM memory if the part is unlocked.
The user row is dumped successfully when using --dump
because nvm_enter_progmode
is called implicitly. Tests below:
GDB invoked with: gdb --args ./cupdi --dump -c /dev/ttyUSB0 -d tiny3217 -v 6 -f out.hex
Stepping through cupdi.c
:
234 if (write || fuses || flag) {
(gdb) p flag
$1 = 256
(gdb) n
235 result = nvm_enter_progmode(nvm_ptr);
I'm going to try to auto-enter progmode in the event that the user row region is read similar to the way --dump
auto-enters progmode.
from cupdi.
Hi, Thomas:
Yes, any action for UPDI accessing chip memory, it should execute the unlock operation first. After that
Userorw area could be read by address access directly, and written by the nvm_write_userrow() function call by nvm_write_auto() <= updi_program().
Of cause you could export the interface of nvm_read_userrow/nvm_write_userrow individually by yourselves.
Best Regards.
from cupdi.
Related Issues (2)
- Slight problem HOT 8
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from cupdi.