suppose that I wanted to learn the ARM CORTEX M3 programming in detail... is using development boards is the right answer? something like Arduino Due or mbed NXP LPC1768 board ( http://www.pololu.com/catalog/product/2150 )?? this is because I really would like to go deeper into ARM technology. any th…

Then I would buy an LPCxpresso or a Due and get stuck in. I'm not sure what practical things you can learn by digging deep into the CPU, certainly very few people need that knowledge I would say, but knock yourself out :slight_smile: Rob

Here's a quiz: What are the differences between a CM0, CM3, and CM4, and ARM9 ARM architecture? What are the differences between the ARM instruction set an the THUMB instruction set? Compare a simple register-based IO port, a "intelligent" IO port (with set/clear/toggle registers), and a register-…

FYI - I am toying with M3 and I've done a small comparison, quite surprised, though.. :astonished: PS: Can somebody try with Due and IDE 1.5.2? Loop: void setup() { Serial.begin(115200); volatile long int t1, t2, i; volatile double temp; t1 = micros(); for (i=1; i<=10000; i++) { temp = sqrt(i)…

I got this: Due @84MHz IDE 1.5.2 double usec empty 0.16 add 2.93 mul 2.49 div 11.9 sin 52.08 sqrt 25.91 Maple @72MHz IDE 0.0.12 double usec empty 0.2 add 2.87 mul 2.52 div 13.32 sin 53.3 sqrt 24 uC32 @80MHz MPIDE 0023 double usec empty 0.11 add 1.54 mul 1.76 div 2.87 sin 1.57 s…

UnoR3 @16MHz IDE 1.5.2 double usec Not really a fair comparison - 32 bit float vs. 64 bit double.

Above in my post there is double vs double comparison. Interesting are the @1MHz results. The best compiler is the microchip's C32, imho..

pito: Above in my post there is double vs double comparison. Interesting are the @1MHz results. The best compiler is the microchip's C32, imho.. That PIC32 is really fast.

learning the ARM CORTEX M3

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pito June 18, 2013, 9:09pm 12

That PIC32 is really fast.

pic32mx is not much faster than cortex-m3, but it seems the gcc compilers are really slow with floating point. Microchip's C30/32 compilers are optimized for their chips..

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learning the ARM CORTEX M3

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