Forums Search for: LPC-E2294
Problem With LPC2103 Board,LPC2103 heating up- schematic provided
inHello All We have designed a board based on Keil MCB 2103 board. The problem is that the controller(LPC 2103) and the 1.8V regulator is heating...
Hello All We have designed a board based on Keil MCB 2103 board. The problem is that the controller(LPC 2103) and the 1.8V regulator is heating up on power up. On inspection we found out that the Pin number 5 of controller ie the 1.8v of the core pin is getting shorted(grounded), later also found out that the controller Vdd3.3v pin number 17 and pin 19(Vss) are getting short. Kindly find the ...
write data to flash lpc2148
inHi, I'm working on a project with a lpc 2148. I've written a program which reads from the serial port a text file. I save the characters of...
Hi, I'm working on a project with a lpc 2148. I've written a program which reads from the serial port a text file. I save the characters of this file in an array: buff[2000]. Now I'd like to write this array to the flash of the lpc2148. But I've a few questions about this operation. - Is it possible to overwrite the bootloader of the lpc2148? When I write accidently to the wrong sector, I...
IAR-LPC-2478 Mass Storage Device
inHi All, I got bunch of sample code working on the LPC2478-STK with LCD, including the mass storage device I want to be able to read file(s)...
Hi All, I got bunch of sample code working on the LPC2478-STK with LCD, including the mass storage device I want to be able to read file(s) in my code so for example I could load an image (BMP) Does anybody have any sample code for reading directories and files from the SD-Card? current way the image is a huge array part of the program. I made my own BMP2code converter in C# (could not fi...
LPC2478 + MT48LC4M16A2P RAM
inDear all, I have an sdram device (MT48LC4M16A2P) connected as follows: SDRAM : LPC ------------------ A0-A11 : A0-A11 A13 :...
Dear all, I have an sdram device (MT48LC4M16A2P) connected as follows: SDRAM : LPC ------------------ A0-A11 : A0-A11 A13 : BA0 A14 : BA1 DQ0-DQ15 : D0-D15 DQML : DQMOUT0 DQMH : DQMOUT1 CKE : CKEOUT0 (P2.24) CLK : CLKOUT0 (P2.18) CAS : CAS (P2.16) RAS : RAS (P2.17) WE : WE (P4.25) CS : DYCS0 (P2.20) My init procedure work...
Using Bit Field structures to access LPC-2000 registers
inHi All I see from IAR C code examples that they use bit field structures to access the LPC-2000 registers. This a neat idea. My knowledge of...
Hi All I see from IAR C code examples that they use bit field structures to access the LPC-2000 registers. This a neat idea. My knowledge of C does not go deep enough to understand the way IAR C code is written which is complicated enough as it goes very deep into lots of embedded include files. Has anyone used this technique using GCC/Yargarto tool chains. If so can anyone send me a samp...
Incorrect RTC Alarm(23:59:59) Issue in LPC2101
inHi all, I am working on LPC2101 for past 4 months. I am facing one unexpected behavior when put LPC in to Powerdown mode long time and...
Hi all, I am working on LPC2101 for past 4 months. I am facing one unexpected behavior when put LPC in to Powerdown mode long time and wakeup using RTC Alarm. Sample code step: 1.Enable RTC Reset RTC clock in CCR register. then ILR = 0x03; CCR = 0x11; ...
RTC values reset to zero
inHi i am working with LPC 2368 and using 32k external crystal for RTC and cell as RTC power supply. RTC is working fine, i can set and read RTC...
Hi i am working with LPC 2368 and using 32k external crystal for RTC and cell as RTC power supply. RTC is working fine, i can set and read RTC successfully, but some times it resets to 0(hour,minutes,seconds,day,week,month,year) randomly and by setting again its value it works properly. Regards ------------------------------------
RTOS and Interrupts on the 2148
inHi, I am just getting started on the LPC 2148. Using a Keil uVision IDE demo version and serial port to download the code into flash. Should I...
Hi, I am just getting started on the LPC 2148. Using a Keil uVision IDE demo version and serial port to download the code into flash. Should I first port an RTOS to the 2148 before writing software for it (the application is to control a small solar power system)? If so which freely available RTOS is suitable (like FreeRTOS)? Also require help with using the interrupt controller on the 2148....
Need example project for Rowley CrossWorks for ARM - C/C++
inHello everybody, I'm new to ARM7 development and I'm looking to compile and load my first test program on my Olimex LPC-P2138 development...
Hello everybody, I'm new to ARM7 development and I'm looking to compile and load my first test program on my Olimex LPC-P2138 development board. I'm evaluating the Rowley CrossWorks for ARM compiler/IDE. I've created a solution using the wizard and selected the MCU, Clock Speed etc and a project was created. However, I don't see a source file created the includes a stub for main(). So...
Final LPC Issue: External Reset happens randomly on LPC2101
inHi, I am working on LPC2101.LPC is resetting randomly. I found the reset reason using RSIR registers.It shows external reset(Value is 2)....
Hi, I am working on LPC2101.LPC is resetting randomly. I found the reset reason using RSIR registers.It shows external reset(Value is 2). From user guide,assertion of reset pin makes LPC to reset. 1) What are the conditions in LPC2101 to assert reset line automatically? 2) How to debug this in Software level as well as Hardware level? 3) If anybody faced this issue in already, Pleas...
LPC24xx Ethernet (errata, reliability, compatibility to LPC23xx)
inHi All I have the following Ethernet problem with the LPC2478 (on Olimex LPC-2478-STK): - Note 1: the Ethernet driver is the same as the one...
Hi All I have the following Ethernet problem with the LPC2478 (on Olimex LPC-2478-STK): - Note 1: the Ethernet driver is the same as the one used for the LPC23XX (RMII mode) - Note 2: the same test works without any problems on the LPC2378 on Keil MCB2300 and Olimex LPC2378-STK (tested at 10M and 100M) - Note 3: the test can be seen at http://demo.uTasker.com (not on the LPC24XX at the momen...
audio codec
inHello, does anyone have an idea how to make software speech compression with ratio at least 1:10 or better on ARM microcontroller? I have...
Hello, does anyone have an idea how to make software speech compression with ratio at least 1:10 or better on ARM microcontroller? I have 16kHz/16bit audio stream, which I need to compress and send over narrow band link, so MCU will not be doing almost anything else, than running speech codec. I'd appreciate porting of speex or something similar with 1:16 ratio, but I'm not sure, that LPC d...
Regarding IRQ interrupt
inHi there, Please could you explain to me why the value -0x0FF0 is choosen for IRQ processing, in the startup.s file. I have read that for...
Hi there, Please could you explain to me why the value -0x0FF0 is choosen for IRQ processing, in the startup.s file. I have read that for earlier version of VIC used in LPC controllers this value was -0x0120 ;LDR PC, IRQ_Addr LDR PC, [PC, #-0x0FF0] ; Vector from VicVectAddr Regards, Chetan ------------------------------------
LPC2378 KIT OLIMEX JTAG communication failure
inHi all, I bought KIT LPC2378-STK http://www.olimex.com/dev/lpc-p2378.html and OLIMEX...
Hi all, I bought KIT LPC2378-STK http://www.olimex.com/dev/lpc-p2378.html and OLIMEX ARM-USB-OCD http://www.olimex.com/dev/arm-usb-ocd.html I installed enclosed Software pack with Eclipse, OCD and YAGARTO, and then installed drivers. Now, when i open lpc2378 project in eclipse, build it and try to run OpenOCD, this message appear: Open On-Chip Debugger 1.0 (2008-10-04-10:...
Interfacing an LPC to a cluster of 7 segment displays
inHi, I would like to interface 9 7-segment displays to an LPC microcontroller. I will be using a standard multiplexing scheme, with an enabler...
Hi, I would like to interface 9 7-segment displays to an LPC microcontroller. I will be using a standard multiplexing scheme, with an enabler for each digit, and shared segment lines for all. I have several questions regarding the way the multiplexing has to be handled, and the way it needs to be interfaced. - First, isn't 9 digits too much for multiplexing? Am I going to notice flick...
interfacing zigbee with LPC2138
inHi.I am doing a project on transmission of ECG signals through wireless modes. I have planned to use zigbee. Is this project possible.I heard...
Hi.I am doing a project on transmission of ECG signals through wireless modes. I have planned to use zigbee. Is this project possible.I heard that LPC2138 microcontroller will support zigbee. Is there any other LPC series which will support zigbee. Pls help me at the earliest. Thanks, Deepa
Choosing ARM jtag
inHello, I am newbie about ARM uCs. I have experience about uCs and i am interesting in ARM especially LPC's now. I've searched the jtags and...
Hello, I am newbie about ARM uCs. I have experience about uCs and i am interesting in ARM especially LPC's now. I've searched the jtags and dev. env. on google and i read some group messages but i do not know what i should buy as a jtag. I wanna focus on LPC2468 now. After that i will try an ARM9 based uC and then maybe on ARM11. Which jtag(ulink2, jlink, hlink, olimex's openocd etc.) and which...
Quadrature Encoder
inhi, I am trying to interface Quadrature Encoder with LPC 2148. I am using EINT1 and EINT2 (External Interrupt) for Signal A and Signal B. I...
hi, I am trying to interface Quadrature Encoder with LPC 2148. I am using EINT1 and EINT2 (External Interrupt) for Signal A and Signal B. I have used two ISRs. Please guide. Thanks and Regards Nilesh ? ? The INTERNET now has a personality. YOURS! See your Yahoo! Homepage. http://in.yahoo.com/
lpc 2214 data ram corruption when return from watchdog
inHi everyboby, I'm working with lpc2214 and I've got a problem coming back from watchdog: the ram location 0x40000128 is corrupted (ie its value...
Hi everyboby, I'm working with lpc2214 and I've got a problem coming back from watchdog: the ram location 0x40000128 is corrupted (ie its value is changed). Does someone have the same problem? Do you know some fix or workaround? Thanks Alberto
frequency counter
inHi All, I'm trying to display the frequency of a signal by measuring the time between 2 pulses. Are there any suggestions on how to start...
Hi All, I'm trying to display the frequency of a signal by measuring the time between 2 pulses. Are there any suggestions on how to start with it? I want to use the standard timer counter function, but don't know how to implemt it correctly. Can somebody show me some examples, or push me in the right direction? I'm using the lpc 2148 controller with the Keil compiler. this is what I...