Questions tagged [arm7]
49 questions
3
votes
1 answer
Pinmode register in lpc2468
Will a PINMODE register in lpc2468 affect the status of an input pin i.e can we enable
an internal pull up for an input pin,or it is only possible for output pins.
Eljay
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2
votes
2 answers
Write back buffer in lpc
I was reading the Lpc2148 Manual and in the Static Ram section I came across
Write back buffer
The SRAM controller incorporates a write-back buffer in order to prevent CPU stalls
during back-to-back writes. The write-back buffer always holds the…
Eljay
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1
vote
2 answers
Why does writing 0 to IOSET (ARM7) has no effect?
I am learning ARM7-TDMI using NXP LPC2148.
While studying the reference manual, I came across these two functions - IOSET AND IOCLR , used to set and clear the port bits respectively,
As per the reference manual:
" This register controls the state…
Luffy
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1
vote
2 answers
Problems with peripheral control of a LED on an AT91SAM7X chip
I'm using an AT91SAM7 chip on the MakingThings board for some custom work. To better understand the peripheral driver, I'm trying to directly call/control an output pin (PA12) to turn on the status LED.
main()
{
AT91C_BASE_PIOA->PIO_PER =…
Far McKon
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1
vote
1 answer
How to populate unused flash for an armv7a processor?
I have a decision on how to fill unused memory in a flash device. I've heard of populating with reset instructions as a safe way to handle rogue pointers, etc. Is there a concept of an assembly reset instruction for armv7a processors? Is there an…
tarabyte
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