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[SOLVED] Instruction skipping after spurious interrupt
After reading your detailed description, the easiest workaround that comes to mind: 1. enable the pdca 2. poll the USART CSR TXEMPTY bit until it goes to zero (i.e. the pdca has...
Tuesday, 20 December 2011 - 01:27
BIG BUG ON UC3A0512
Bullshit, lots of chips have all sorts of restrictions on power up sequencing. If this was such a financial hardship for the OP why didn't he try to resolve the slow rate of rise...
Friday, 16 December 2011 - 00:31
BIG BUG ON UC3A0512
I don't think Atmel will ever fix this as the "problem" presented by the OP only exists when operating the device outside the published limits. The datasheet states that the...
Thursday, 15 December 2011 - 19:40
avr32studio + JTAGICE mkII + EVK1101
I remember seeing an application note (darned if I can find it now) on Atmel's website talking about later versions of AVR32 Studio dropping support for the ES (engineering sample...
Thursday, 8 December 2011 - 19:24
LED/GPIO Question
Maybe the LED itself is installed on the board backwards? ;)
Sunday, 4 December 2011 - 11:36
Interrupthandling without ASF
Try it like this: __attribute__((__interrupt__)) void _PWMAInterrupt(void) and be sure to remove the asm("rete"); you show above.
Thursday, 24 November 2011 - 12:12
Interrupthandling without ASF
Also, to elaborate on what hce said, the interrupt attribute will get the stack cleaned up properly so you don't wind up executing code from SRAM.
Wednesday, 23 November 2011 - 11:48
Skin Effect and High Currents
The 2.5kHz should be insignificant as it should be small amplitude ripple on the 50Hz.
Sunday, 13 November 2011 - 22:44
Current Sense
The op amp inputs must always be within the amp's supply voltage rails; in this case +5V and GND. The circuit shown will try to make the inputs be at +9.5 volts. This won't work...
Sunday, 13 November 2011 - 18:56
Measuring Current use of a H-bridge driven by PWM
Measure the motor current directly with an Allegro ACS712. I've used these in exactly the same type of motor drive circuits you describe with very good results.
Tuesday, 4 October 2011 - 22:37
Looking for AVR32 assembly language tutorial
I think you may be out of luck. The AVR32 Architecture Document is the only resource available that I know of that covers the AVR32 instruction set and syntax. Are you trying to...
Monday, 26 September 2011 - 23:24
AVR32 CPU Usage
AFAIK there are no utilities that are ready made to do this. You will have to write code yourself to measure the performance.
Monday, 1 August 2011 - 10:43

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