topic Re: LPC 18xx and RAM blocks in LPC Microcontrollers

LPC 18xx and RAM blocks

phateee — Tue, 18 Jul 2017 10:47:14 GMT

Hello,

can me somebody help, please?

I try to use different blocks of RAM. LPC 1837 has

Flash MFLASH 512

Flash2 MFLASH 512

RAM RamLoc32

RAM2 RamLoc40

RAM3 RamAHB32

RAM4 RamAHB16

RAM5 RamAHB_ETB16

When I use RAM and RAM2, it works:

__DATA(RAM2) test_array_1 t1;

__DATA(RAM) test_array_2 t2;

but, when I try to use another blocks, the processor has any problem. It can't boot or has a problem with USB (doesn't work).

__DATA(RAM3) test_array_3 t3;

__DATA(RAM4) test_array_4 t4;

__DATA(RAM5) test_array_5 t5;

These RAM3, RAM4, RAM5 are usefull only for peripheries?

thx

Re: LPC 18xx and RAM blocks

jeremyzhou — Tue, 25 Jul 2017 01:43:53 GMT

Hi Jan Mal&yacute,

Thank you for your interest in NXP Semiconductor products and

for the opportunity to serve you.

I was wondering if you can share the screenshot of the space range of these RAM blocks.

I'm looking forward to your reply.

Have a great day,
TIC

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Re: LPC 18xx and RAM blocks

phateee — Tue, 25 Jul 2017 07:54:52 GMT

Hi,

I think, that I found the problem. I use vcom port (usb) and probably this port use RAM3 RamAHB32.

When I don't use RamAHB32, it works...