lpc1311 trouble

[lpcware]

Content originally posted in LPCWare by ursus_inL on Wed Jan 22 03:07:27 MST 2014
Hi!
I decided try out lpc1311 as i find it prefect for undemanding projects because of size/cost. This is my first time dealing with cortex processors (previously i used arm7 procs like LPC2148 and atmegas).
i've designed a simple board (sch attached: lpc1311_sch_ursus.pdf).
I can successfully flash the device using flashmagic (write hex, read flash data...),[u] but gpio pins are always at 2.2V[/u] (as if they where inputs).

Here is the example of the code i tryed:

#include "LPC13xx.h"

int main(void) {

     LPC_SYSCON->SYSAHBCLKCTRL  |= (1<<6);    //GPIO clk en
     LPC_SYSCON->SYSAHBCLKCTRL |= (1<<16);              //IOCON clk en
     LPC_SYSCON->SYSAHBCLKCTRL   |= 0x7ffff;        //en all clk


     LPC_IOCON->PIO0_7            = 0xD;            //pin function : 0011010000=> 0x0D0
     LPC_GPIO0->DIR              |= (1<<7);                     //pin direction

     LPC_GPIO0->DATA           &= ~(1<<7);                   //set pin low

  /*   while(1){                      // loop - commented out for now...

          LPC_GPIO0->DATA           |= (1<<7);    //set pin high
          for(i=0; i<0x10000; ++i);             
          LPC_GPIO0->DATA           &= ~(1<<7);   //set pin low
          for(i=0; i<0x10000; ++i);              

     } //end while
*/
} //end main

Did i miss something when designing HW or is it a software problem? It looks to me as if the processor does not reach the main function code.

Thank you for your help

[lpcware]

Content originally posted in LPCWare by R2D2 on Wed Jan 22 14:13:08 MST 2014

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Quote: ursus_inL
I would guess it's number 3. Anyways tried same code in Keil and CoIDE.
Both projects are attached...

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Surprisingly enough I'm not using Keil or CooCox...

Anyway, I would strongly recommend to use a debugger to check registers and their contents.

IIRC there is a cheap simple IDE with debugger support called LPCXpresso, which can save a lot of time...

BTW: This line is obviously nonsense:

 LPC_IOCON->PIO0_7            =[color=#f30] 0xD[/color];    //pin function : 0011010000=> [color=#f00]0x0D0[/color] 

[lpcware]

Content originally posted in LPCWare by ursus_inL on Wed Jan 22 05:14:48 MST 2014

I would guess it's number 3. Anyways tried same code in Keil and CoIDE.
Both projects are attached...

[lpcware]

Content originally posted in LPCWare by R2D2 on Wed Jan 22 04:47:02 MST 2014

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Quote: ursus_inL
any other ideas?

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1. Your code is not working...

2. Your hex isn't valid...

3. Your clock setup is wrong...

Without seeing your project it's just guessing. You didn't give us a hint which IDE you are using and how you are generating your hex file...

[lpcware]

Content originally posted in LPCWare by ursus_inL on Wed Jan 22 04:10:40 MST 2014

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Quote:
R2D2 wrote:
You are pulling ISP pin low. Usually it's pulled high and just grounded if you want to use ISP...

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Thanks for your answer and yes, that is an error. i don't know why i did it ;) sadly this is [u]not the source of trouble[/u]. I already placed a resistor to pol ISP pin high, not low. forgot to mention it before..

any other ideas?

[lpcware]

Content originally posted in LPCWare by R2D2 on Wed Jan 22 03:38:40 MST 2014

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Quote: ursus_inL


Did i miss something when designing HW...

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You are pulling ISP pin low. Usually it's pulled high and just grounded if you want to use ISP...