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hijacking avr-gcc/etc from your Arduino install...
With WINAVR becoming unmaintained, various people including myself are starting to think that the easiest way of getting a basic set of avr-gcc tools installed on your Windows...
Monday, 27 February 2017 - 11:31
malloc, free, and __brkval
the avr-libc implementation of malloc() and free() goes to some lengths to maintain __brkval; the top of RAM that is "unformatted" (In between __heap_start to __brkval, we have...
Thursday, 22 December 2016 - 01:50
avr-gcc error messages extra verbose...
The way that avr-gcc (probably gcc in general) handles the #error and #warning processor commands has changed, and gotten a lot messier.   In GCC 4.3 (WINAVR) make atmega328...
Monday, 19 December 2016 - 10:52
getting back-to-back SPI transfers on SAM3X
So I'm using a SAM3X8E processor (Arduino Due clone), and trying to get SPI to go as quickly as possible.  The SAM is running at 84MHz, and the SPI is set to 28MHz. But I'm...
Monday, 5 December 2016 - 09:18
Arduino® – Maker to Market Workshop (San Jose)
Arduino® – Maker to Market Workshop Quote:Join our Wizard of Make, Bob Martin, on September 21, 2016, at Microchip’s San Jose Office for an informative hands-on session covering...
Tuesday, 13 September 2016 - 09:45
ASF: cycle_counter delay functions...
For SAM3X, in cycle_counter.h, we have: #define cpu_us_2_cy ( us, f_cpu ) (((uint64_t)(us) * (f_cpu) + (uint64_t)(14e6-1ul)) / (uint64_t)14e6)For 1 us on an...
Friday, 6 May 2016 - 08:22
Where is libsam ?
I have noticed that the Arduino Due builds on Atmel's "libsam" library, rather than on ASF. Where can I find the libsam documentation?  It doesn't seem to show up with...
Friday, 6 May 2016 - 08:00
New chips: ATtiny102, ATtiny104
http://blog.atmel.com/2016/02/23...   These seen to be the new "brain-dead" core (16 registers, no MOVW, etc) used on the 6-pin ultra-tinies, but with more pins (8 or 14) and...
Tuesday, 1 March 2016 - 10:36
eeprom functions have moved in new Atmel gcc...
The optiboot bootloader uses "-nostdlib -nostartfiles" to supress the start files and other stuff copied into normal binaries to save space.   On versions that include...
Saturday, 6 February 2016 - 09:26
Weird gcc behavior: unconditional code produced for "for" loop?
Is the compiler somehow permitted to assume that a positive "integer" constant that is incremented will always be positive? void externfunc(int); int main() { for (int a =...
Sunday, 17 January 2016 - 11:04
GPIO on SAMD: why would I ever clear PORT_PINCFG_INEN ?
Why would I ever want to clear the PORT_PINCFG_INEN bit in SAMD pincfg register? It seems like it is far enough "downstream" of other functions that there would never be a reason...
Monday, 28 December 2015 - 02:41
SAM-BA Bootloader/Boot Assistant on factory fresh chips?
Which chips have SAM-BA in memory when shipped from the factory? I guess the larger ARMs (SAM3, SAM4) have that or some other bootloader in factory-ROM and it stays there. ...
Friday, 11 December 2015 - 17:37

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