Hi everyone, I know that some ARM7 chip, such as S3C4510, can be programmed using a JTAG parallel cable without a emulator. Does anyone konw...

Hi everyone, I know that some ARM7 chip, such as S3C4510, can be programmed using a JTAG parallel cable without a emulator. Does anyone konw how to program AT91SAM7S64 using a JTAG parallel cable? Thanks, Ken

Hi, I'm designing a board where the microcontroller is supposed to drive 10 red leds and 4 optocouplers. I would like to drive the leds and...

Hi, I'm designing a board where the microcontroller is supposed to drive 10 red leds and 4 optocouplers. I would like to drive the leds and the opto's without a series resistor using the PWM technique. I made some experiments and all seems to work fine in the lab. 1. The supply voltage is 3.3 Volt 2. The microcontroller is an ARM7 by NXP (LPC2387) 3. In DC, the microcontroller's GPIO...

I am considering the embedded USB host solution using the Atmel' AT43USB380 and ATmega64. AT43USB380 is capable of interfacing directly t a 8...

I am considering the embedded USB host solution using the Atmel' AT43USB380 and ATmega64. AT43USB380 is capable of interfacing directly t a 8 bit MC, and I think the ATmega64 is suitable. But I cannot find th appropriate AT43USB380 firmware that can be integrated with the ATmega6 MC. In Atmel's website, I can only find the firmware specifically compile for ARM7. Plz help me solve this proble...

Im trying to copy the LR to R0 to return the calling function's address to some other function, but Im coming with some issues. Im modifying my...

Im trying to copy the LR to R0 to return the calling function's address to some other function, but Im coming with some issues. Im modifying my division libraries to detect a divide by zero and return the calling function's address back to another function to record the initial division's address I have two similar assembly functions, one 32 bit which works fine, and a 16 bit which does not....

Hello, I built bootloader for NXP LPC2468FBD208. Following files were generated: NXP2468_BootLoader.axf NXP2468_BootLoader.hex I'm using...

Hello, I built bootloader for NXP LPC2468FBD208. Following files were generated: NXP2468_BootLoader.axf NXP2468_BootLoader.hex I'm using Keil tools. I have ULINK2 debugger connected from PC(USB) to target board. Which above file do I load in the target using the debugger? How do I know where in memory will bootloader reside? How do I load the bootloader into the target? Thank you! ...

I'm programming an ARM7 microcontroller with embedded C using an IDE. Everything works fine initially after loading the program. When I...

I'm programming an ARM7 microcontroller with embedded C using an IDE. Everything works fine initially after loading the program. When I press soft reset, the interrupts stop working. I tried the example codes for the microcontroller that involve interrupts and had the same results: works for the first time after loading and stops working after soft reset. Is there anything different runn...

Hey Any of you had any experience with running tcp/ip stack on 8051 for GPRS purpose?? Which 8051 uC and TCP/IP stack did you use?? Free...

Hey Any of you had any experience with running tcp/ip stack on 8051 for GPRS purpose?? Which 8051 uC and TCP/IP stack did you use?? Free ones preferred :-) Or should I use a different uC like AVR ATMega128 og an ARM7 like Phillips LPC21XX. I've only got experience with 8051 uC.... It's my first GPRS project, any suggestions on my choice of TCP/IP stack?? Regards Jesper Denmark ...

I am having a problem calculating the baud rate of 9600 bauds for ARM7 (LPC2148) at 12MHZ crystal. I have figured out a value of : ...

I am having a problem calculating the baud rate of 9600 bauds for ARM7 (LPC2148) at 12MHZ crystal. I have figured out a value of : U1DLM=0x00; U1DLL=0x62; following is my UART1 initialization code: void init_UART1() { PINSEL0=0x00050000; // FOR UART1 U1LCR=0x83; U1DLM=0x00; U1DLL=0x62; U1LCR=0x03; U1FCR=0x01; } please help me if there is any other...

Hi, I'm experimenting an odd problem with a FreeRTOS asm/C mixed macro as my code grows bigger: I'm using an ATMEL EB40A ev. board and GCC...

Hi, I'm experimenting an odd problem with a FreeRTOS asm/C mixed macro as my code grows bigger: I'm using an ATMEL EB40A ev. board and GCC 4.02 WinARM dev. environment, and my application runs fairly good. The problem is that now my code is large (.text is about 0x12000 bytes long) and some macros (like portSAVE_CONTEXT() and restore()) macros stopped working: the compiler stops repo...

Greetings. I'm trying to find some genious data to fill into the unused FLASH space in my project, so that a stray program counter would get...

Greetings. I'm trying to find some genious data to fill into the unused FLASH space in my project, so that a stray program counter would get caught and my system would reset. I'm thinking one of multiple solutions: :o) Loop to current position and get caught by the watchdog :o) Jump to reset vector :o) An illegal opcode, that will generate an interrupt :o) A software interrupt inst...

Hi, I are facing performance related issues in my ARM project, I am using th ATMEL AT94M55800 ARM7 chip, I planned to go for the thumb mode...

Hi, I are facing performance related issues in my ARM project, I am using th ATMEL AT94M55800 ARM7 chip, I planned to go for the thumb mode but it GCC (3.3.2) dose not seem to compile properly in thumb mode. I have tried with -mthumb -mthumb-interwork option as some code need to b in arm mode. Do you guys know how to do this. Secondly dose gcc have any linker option that can load an ...

Hi., I have Lampex LG322402 Touch Screen with SED 1335 controller, I want to interface this Touch Screen with Any Microcontroller... Can...

Hi., I have Lampex LG322402 Touch Screen with SED 1335 controller, I want to interface this Touch Screen with Any Microcontroller... Can anybody suggest me How to interface this Touch Screen?? And Which micro controller is best suited? Is there any need for ARM7 core controller or i can interface with simple 8-bit microcontrollers aslo????

Hi, I plan to make a router application using a Coldfire, a Blackfin or an ARM7 running uCLinux. I can not find any information on the...

Hi, I plan to make a router application using a Coldfire, a Blackfin or an ARM7 running uCLinux. I can not find any information on the minimal Flash/Ram required to run uCLinux. My application will take about 256 kbytes Flash and 32ko RAM. Does anyone have experience on running uClinux on small configuration ? Will I have any problem if my hardware has 2Mbytes Flash and 256kbytes of RAM ?...

I will to learn from u and Iwish to impress my girl friend with 3 of her pics ... greeting, I will to learn from u and I wish to impress...

I will to learn from u and Iwish to impress my girl friend with 3 of her pics ... greeting, I will to learn from u and I wish to impress my girl friend with 3 of her pics ...rotating in color LCD at ARM7 board like Leon. because I have been thinking of her since I met her. can u help me with some circuit diagram and programming?

Dear All I am reading ARM7TDMI processor. Those who are familiar with ARM7TDMI processor are aware of the "Thumb" instruction set. The...

Dear All I am reading ARM7TDMI processor. Those who are familiar with ARM7TDMI processor are aware of the "Thumb" instruction set. The native ARM instruction set is 32 bit, but the latest generation such as ARM7TDMI has a mode bit which you can flip to execute a 16-bit subset of the instruction set. Both instruction sets operate on 32-bit data, but it's claimed that the Thumb ins...

Hello, This year I started a new project which I called usbprog, because I was fed up to the back teeth with buying another programming...

Hello, This year I started a new project which I called usbprog, because I was fed up to the back teeth with buying another programming adapter. http://www.embedded-projects.net/index.php?page_id=165 usbprog is a free programming adapter. You can easily install different firmware versions from an "online pool" over USB. In my little firmware-pool I have already: - AVRISP mk2 Clon...

Atmel has launched the DIOPSiS DSP Design Contest 2005 http://www.atmelroma.it/contest/index.php First price is 6000Euro. Atmel will...

Atmel has launched the DIOPSiS DSP Design Contest 2005 http://www.atmelroma.it/contest/index.php First price is 6000Euro. Atmel will be happy to have Universities andd Colleges participating in the contest. By combining a floating-point VLIW digital signal processor core with an ARM7 microcontroller on the same chip, Atmel Corp. adds a new wrinkle in an already intensely com...

I have to drive a TFT display with an ARM7 ST MCU (STR750 family). The application must show some color images (8 bit per color) on a 320x240...

I have to drive a TFT display with an ARM7 ST MCU (STR750 family). The application must show some color images (8 bit per color) on a 320x240 QVGA. The choosen MCU has up to 256KB internal flash and 16KB internal RAM. I plan to add one external serial flash (ST serial flash connected to the MCU's SMI interface) and maybe an external RAM (always ST product). The TFT is a 12 bit-depth co...

I want to implement a 32 bit bitmap with alfa channel in an arm7 micro....the function...

I want to implement a 32 bit bitmap with alfa channel in an arm7 micro....the function is new_pixel=alfa*pixel_foreground+(1-alfa)*pixel_background alfa is an 8 bit value from zero to one (from zero to 255). This function can be done in this way: 1)float cast of alfa and pixel_foreground 2)alfa1=alfa/255 3)new_value1=alfa1*pixel_foreground 3)new_pixel=new_value1+new_value2 3)int cast af n...

Hallo, ich unternehme gerade die ersten Schritte mit dem ARM7 at91r40008. Ich benutze das Entwicklungsboard eb40a und die Entwicklungsumgebung...

Hallo, ich unternehme gerade die ersten Schritte mit dem ARM7 at91r40008. Ich benutze das Entwicklungsboard eb40a und die Entwicklungsumgebung von Hitex, Debugging mit Tantino. Bevor man ein Beispielprogramm =FCber die JTAG-Schnittstelle (Tantino) auf den Controller laden kann muss man die Sektoren den Flashs l=F6schen, in denen das auf dem Controller standardm=E4=DFig installierte Prog...