I want to enable Timer0 interrupt. But IRQ interrupt occurs as soon as IRQ bit
is cleared at bootup. This is happening when I run my code on board. I have
added a breakpoint in first line of ISR. But this is not happening when I run my
code in ARM debugger IDE software. As I understand IRQ interrupt should happen
when both IRQ bit is enabled in CPSR and LBP2129 VIC. Please let me know if
anyone faced this problem. My code: -
> Have you considered this:
www.olimex.com/dev/index.html
>
> DaveS
>
Whats with the few LCP boards that have >1MB ram? Theirs a few with 32MB SRAM
and a 1MB Flash.
I would assume that the larger SRAM versions are meant to run a RTOS or Linux
and the SRAM is their for overhead.
I also considered making a little wiki device with say an LPC2214 and >512MB
Flash and a 8/16bit touch LCD as a stepping stone to a full sized $100+
project.
I see Olimex has a JTAG wiggler, I have my AVR Dragon that has JTAG any change
that can be made to work? (I assume ARM has their own JTAG protocols) If not
could a LPCXpresso's USB JTAG device be used across the entire LPC family
tree? Their quite cheap dev kits ($35)
Reply by rtstofer●May 18, 20102010-05-18
--- In l..., David Smead wrote: >
> Here's a US distributer for the mini2440: http://www.friendlyarm.us
>
> Have you considered this: www.olimex.com/dev/index.html
>
> DaveS
>
Have you considered this: www.olimex.com/dev/index.html
DaveS
On Tue, May 18, 2010 at 2:52 PM, micro_minded wrote: > I just checked out the KaRo TX25
(http://www.karo-electronics.com/tx25.html)
> I was also looking at the Micro2440
(http://www.thaieasyelec.net/index.php//SBC-/-Embedded-OS/Micro2440-stamp-module-128MB-NAND-FLASH-/p_82.html)
>
> The KaRo is about $10 more but its also quite a bit smaller, must be a 6-10
layer board to cram it all on there! Anybody know the price of their "Starter
Kit" I wouldn't want to jump in feet first with a $80 SODIMM sized mcu with
a home made board...
> --- In l..., "thefreem999" wrote:
>>
>> micro_minded,
>> We do not use the ARM7s for VGA displays, there really is not enough
horsepower to drive the display. We use Freescale's iMX25 for that kind of
work. It is ARM9 core running at 400MHz. There is a company called Karo that
sells a SOM for $80, it has 128M of Flash, 64M of RAM and LCD controller. They
sell it with a Linux and WindowsCE OSes. We use the WinCE version, Microsoft
makes user interfaces easy. If we need super real time performance, we will add
a little ARM7 on the side to do that work. However, for 99% of our designs,
WinCE is real time enough.
>>
>> My two cents,
>> Michael Freeman
>> Principal Design Engineer
>> Update Systems, Inc.
>
>
The downside to all this is I want to build my own custom setup and not just
program something I buy from china. If I wanted to sell this as a product It
might fly using a SODIMM MCU or board like the Micro2440 but the rest of the
board would need to be custom made. I was hoping I could find a chip that was
NOT BGA and could be designed and built by me.
--- In l..., "rtstofer" wrote: >
> --- In l..., "micro_minded" wrote:
> >
> > I just checked out the KaRo TX25
(http://www.karo-electronics.com/tx25.html)
> > I was also looking at the Micro2440
(http://www.thaieasyelec.net/index.php//SBC-/-Embedded-OS/Micro2440-stamp-module-128MB-NAND-FLASH-/p_82.html)
> >
> > The KaRo is about $10 more but its also quite a bit smaller, must be a 6-10
layer board to cram it all on there! Anybody know the price of their "Starter
Kit" I wouldn't want to jump in feet first with a $80 SODIMM sized mcu with
a home made board...
> >
> > I have one of the Mini2440 'systems' like this:
> http://www.ecrater.com/product.php?pide11442
>
> It works pretty well but the display is definitely on the 'personal'
side. A lot like a PDA
>
> It's the same chipset but the board has a few more peripherals
implemented.
>
> Richard
>
The KaRo is about $10 more but its also quite a bit smaller, must be a 6-10
layer board to cram it all on there! Anybody know the price of their "Starter
Kit" I wouldn't want to jump in feet first with a $80 SODIMM sized mcu with
a home made board...
--- In l..., "thefreem999" wrote: >
> micro_minded,
> We do not use the ARM7s for VGA displays, there really is not enough
horsepower to drive the display. We use Freescale's iMX25 for that kind of
work. It is ARM9 core running at 400MHz. There is a company called Karo that
sells a SOM for $80, it has 128M of Flash, 64M of RAM and LCD controller. They
sell it with a Linux and WindowsCE OSes. We use the WinCE version, Microsoft
makes user interfaces easy. If we need super real time performance, we will add
a little ARM7 on the side to do that work. However, for 99% of our designs,
WinCE is real time enough.
>
> My two cents,
> Michael Freeman
> Principal Design Engineer
> Update Systems, Inc.
Reply by Herbert Demmel●May 18, 20102010-05-18
Am 18.05.2010 17:21, schrieb Paul Curtis: >> As already mentioned in my last email, it is *no*
problem when you
>> execute from internal flash. We do run a 24 MHz pixel cock TFT even
>> with 1024x600 pixel with 16 bit colors (SDRAM is 16 bit wide).
>>
> A "Pixel cock TFT"? Wow, am I in the wrong forum!
> Who cares about missing l's ;-)
Herbert
Reply by Paul Curtis●May 18, 20102010-05-18
> As already mentioned in my last email, it is *no*
problem when you
> execute from internal flash. We do run a 24 MHz pixel cock TFT even
> with 1024x600 pixel with 16 bit colors (SDRAM is 16 bit wide).
A "Pixel cock TFT"? Wow, am I in the wrong forum!
--
Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
CrossWorks V2 is out for EFM32, STM32, LPC1000, SAM9, and more!
Reply by Herbert Demmel●May 18, 20102010-05-18
Am 18.05.2010 14:55, schrieb micro_minded: > I have looked for external control IC's but can
only find ready made products that cost around $100 which kills the selling
point of my project. I know of chips such as HX8655 chips but they are gate&
source drivers
(http://www.thaieasyelec.net/index.php//Display-Module/TFT-with-TP/4-3-inch-WQVGA-Color-TFT-Touch-Screen/p_10.html)
and It looks like in order to use them you need to custom build a board that can
access the LCD's direct raw/col pin outs. Have not found any chips that do
px_clk, hsync, vsync besides controllers on board micros.
>
> I did consider using an FPGA for clock generation, timing and have it raw dump
addresses to external DDR RAM but thats a whole other project to itself...
>
> My screen will require a minimum of 24MHz dot clock and 9Mb RAM for single
buffering 6Mb if I only use it in 16bit mode. I imagine the little LPC would
spend nearly all of its time updating the screen.
>
As already mentioned in my last email, it is *no* problem when you
execute from internal flash. We do run a 24 MHz pixel cock TFT even with
1024x600 pixel with 16 bit colors (SDRAM is 16 bit wide). But it's up to
you to invest a lot of money and development time to use something
external like a FPGA ...
By the way: 800 * 480 * 2 = 768000 Byte - this is the amount of SDRAM
you need for one frame when running the TFT in 16 bit mode
