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Results tagged with c
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user 226619
C is an imperative (procedural) systems implementation language. It was designed to be compiled using a relatively straightforward compiler, to provide low-level access to memory, to provide language constructs that map efficiently to machine instructions, and to require minimal run-time support. C was therefore useful for many applications that had formerly been coded in assembly language. from http://en.wikipedia.org/wiki/C_(programming_language)
1
vote
Accepted
Removing optimization changes I2C timing
Finally figured it out. Just had to reduce SCL frequency. I noticed that the clock line was a low for a lot longer between bytes for the -O0 optimization waveforms, so I figured it had something to do …
- 207
4
votes
Accepted
Mysterious NVM write protection
Figured it out. I was issuing the Erase Page command instead of the Erase Block command. Erase page is only for the USER data page in flash and not the main flash bank.
Here is the code that worked …
- 207
2
votes
1
answer
238
views
Mysterious NVM write protection
I'm implementing a serial bootloader on an ATSAME51N20A (Cortex-M4). I'm reading in packets of UART, and writing them to internal flash. For some memory addresses the flash writes work fine, and for o …
- 207
0
votes
1
answer
219
views
Removing optimization changes I2C timing
I'm at using SAM E54 Xplained Pro to get temperature readings from a MCP9600 hooked up to a thermocouple over an I2C bus. I'm using Atmel Studio 7 with I2C drivers generated with Atmel Start. I'm usi …
- 207