I have tried to sort out the "unbdefined reference sbrk" message. First my system comfiguration, then my attempts. I have to build an executable...

I have tried to sort out the "unbdefined reference sbrk" message. First my system comfiguration, then my attempts. I have to build an executable (elf file) for powerpc with gnu-gcc 4.2.2. installed on windows XP. The tool chain works properly because I already managed to build several other projects without using function with dynamic allocation (e.g., malloc). The options that I use for compilain...

At the risk of starting a flame war, which choice have people really made with regard to Little-Endian vs. Big-Endian for those processors where...

At the risk of starting a flame war, which choice have people really made with regard to Little-Endian vs. Big-Endian for those processors where it's a design choice (ARM, PowerPC,...)? I'm asking in the context of using such processors in embedded applications where compatibility with anything in the outside world is not a factor.

Hiya folks, as you might guess from the subject: I'm trying to find a toolchain for freescale's hcs12 or S12X family of microcontrollers....

Hiya folks, as you might guess from the subject: I'm trying to find a toolchain for freescale's hcs12 or S12X family of microcontrollers. Currently i'm using Codewarrior on the Windows machine at work, but as i'm a tad dissatisfied by it's lack of decent syntax-checking and have no windows at home, i'd rather use some free compiler available for my rather unusual platform (Linux on PowerPC...

Hello All My company is in the beginning phase of rewriting an embedded task-driven operational flight program from an ancient processor...

Hello All My company is in the beginning phase of rewriting an embedded task-driven operational flight program from an ancient processor (Z8000 in ASM) to a modern language that will run on a PowerPC processor. My question is this: Does anyone have any documentation or paper information on what types of issues, pitfalls, and obstacles usually pop up when going from a dedicated, mature...

I am getting the OOPS message that follows and have been having a very difficult time determining what is causing it. According to...

I am getting the OOPS message that follows and have been having a very difficult time determining what is causing it. According to "PowerPC Microprocessor Family: The Programming Environments for 32-Bit Microprocessors", "When an exception occurs, bits 1-4 and 10-15 of SRR1 are loaded with exception specific information." SRR1 is 00089032, so bits 1-4 are 0000 and bits 10-15 are 001000. U...

Be it ARM, XScale, PowerPC, MIPS or any other kinda chip? How difficult is it to design a small prototype board that can boot an off the shelf...

Be it ARM, XScale, PowerPC, MIPS or any other kinda chip? How difficult is it to design a small prototype board that can boot an off the shelf embedded linux distro? Its been something I've been meaning to try but don't have enough info on how to go about it. Where does one begin? And how does a person build and mount these chips onto the board when many of these chips are all BGA forma...

Hi guys. I'm doing some investigation regarding TRACE32 Simulator. I'll be simulating a board with a PowerPC chip installed running in pSOS....

Hi guys. I'm doing some investigation regarding TRACE32 Simulator. I'll be simulating a board with a PowerPC chip installed running in pSOS. When using the board, I simply connect it through RS232 to my PC. To test it, I use the Hyperterminal in Windows. But what I want is, instead of using the board, I want to use TRACE32 Simulator as if it was connected to my PC through RS232. I want to hav...

I am looking at the linker manual for the Diab PowerPC linker command language, and cannot find any sufficient information on the use of...

I am looking at the linker manual for the Diab PowerPC linker command language, and cannot find any sufficient information on the use of the Overflow Specification - which is supposed to be the ability to have code that overflows one segment be directed to another. Does anyone know of any better documentation on how to make use of this? Our code has grown to exceed one of the allocated blo...

I'd appreciate some pointers to sites which could explain to me some details on 1. Using a flash card (i.e. SD) to store MP3 data 2. Using a...

I'd appreciate some pointers to sites which could explain to me some details on 1. Using a flash card (i.e. SD) to store MP3 data 2. Using a (powerful, i.e. PowerPC) controller to read the bit stream 3. Perform the decoding, outputting to a DAC Point three I can find much info but I'm having problems finding info on one and two. I'm interested if a TOC or similar is used on the flash devi...

Hey All, I have a header file for MPC8xx freescale powerPC QUICC I uC (MPC885 specifically). I want to write a simple code to do a simple read...

Hey All, I have a header file for MPC8xx freescale powerPC QUICC I uC (MPC885 specifically). I want to write a simple code to do a simple read write for any of the INPUT/OUTPUT PORTs. I went through a documentation but I dont know how to make use of the header file to make my job easier. I am new to C/C++ so it will be great if someone can point me in the right direction. May be a small snip...

I am considering building a very small custom PowerPC-based (MPC8241) SBC for something. I need a recommendation for a proto house that can, at...

I am considering building a very small custom PowerPC-based (MPC8241) SBC for something. I need a recommendation for a proto house that can, at a reasonable price, reflow these BGA parts onto a PCB for me. I don't want anything else stuffed, just this one part, since I need to bring up the rest of the board piece by piece. I'd probably only want three boards made this way. I don't plan to hav...

I'm a software person that is in over my head. I have to select a 1553 interface card for a 6U cPCI chassis that has a PowerPC board running...

I'm a software person that is in over my head. I have to select a 1553 interface card for a 6U cPCI chassis that has a PowerPC board running vxWorks. Unfortunately, I don't know anything about cPCI, except for some reading I've done today. My problem is that I don't know what I need to check so I can be reasonably certain that a cPCI interface card will be compatible with our chassis & pr...

I would like to see recommendations on existing OSS or free RTOS (with 32 bit ARM, PowerPC and x86 targets). I think it is important to have...

I would like to see recommendations on existing OSS or free RTOS (with 32 bit ARM, PowerPC and x86 targets). I think it is important to have a free-as-in-beer license for training/trial purposes as well as possibly a commercial version to actually ship products and get support. Please discuss "performance" and ease of use. Not really interested in Linux (too big). 1) RTEMS http:...

Hello, I have a board with an embedded PowerPC (mpc8241), on which there is no audio hardware. I want this board to have audio capabilities....

Hello, I have a board with an embedded PowerPC (mpc8241), on which there is no audio hardware. I want this board to have audio capabilities. I have serial ports, usb ... but no i2s, which is, from what I've understood from my previous readings, the bus needed to control a DAC. I'd like the sound data to be oversampled to 192kHz. (let's say I have a HDD connected to this board and it co...

Can anyone recommend a WLAN card for the following system: - PowerPC freescale MPC5200 (PPC 603e core) - Linux kernel 2.4.25 (www.denx.de,...

Can anyone recommend a WLAN card for the following system: - PowerPC freescale MPC5200 (PPC 603e core) - Linux kernel 2.4.25 (www.denx.de, module linux_2_4_devel) - form factor: MiniPCI type III Until now, I have two old cards running on that platform (Hermes- and Prism-chipset). But these cards are discontinued. I have also tested a few newer cards - but without success. The Athero...

I'm curious. Is anyone worrying about connecting a disk drive (floppy or HD) to an embedded system evaluation board? Or is the general...

I'm curious. Is anyone worrying about connecting a disk drive (floppy or HD) to an embedded system evaluation board? Or is the general approach to just use the Ethernet connection to a host? I've got a few evaluation systems (EZ80, Rabbit, PowerPC, 68332) and I'd like to try providing them with their own, decicated bulk storage. I've looked at USB, but the protocol seems horribly comp...

Hi all, This week I inherited a buggy linux 2.4 device driver which controls a device through I/O memory. Most of the known bugs were caused...

Hi all, This week I inherited a buggy linux 2.4 device driver which controls a device through I/O memory. Most of the known bugs were caused by direct pointer dereferencing to the I/O memory space, without proper use of readb()/writeb() and friends, so those were easy to fix. The next step would be to move a big part of the code to userspace, because a lot of the driver consists of 3d pa...

In looking at various 32-bit MCUs, I've seen watts per MHz mentioned. A linuxdevices.com news article talks about Powerpc 405: "Power usage...

In looking at various 32-bit MCUs, I've seen watts per MHz mentioned. A linuxdevices.com news article talks about Powerpc 405: "Power usage is listed as 0.2mW/MHz". So lets take the simple PIC. Can I clock it down and watch power usage go down linearly? If a chip is 10mA at 10MHz, will it be 10uA at 10kHz? I take it theres always a base current at DC. so the equation should be (K x MHz) + ...

Will trade for something interesting of similar value. I've got an unwanted Freescale MPC8315E-RDB here on my desk. It has been unpacked and...

Will trade for something interesting of similar value. I've got an unwanted Freescale MPC8315E-RDB here on my desk. It has been unpacked and repacked once, but is otherwise absolutely new - nothing has even been changed on the hard disk. Specs for the kit are and in more detail at

Hi Does sombody know a way to disable optimization for part of a code? I have a code that writes data to some HW machine. It has to do it...

Hi Does sombody know a way to disable optimization for part of a code? I have a code that writes data to some HW machine. It has to do it in acertain order. Although I use volatile to write to those adresses the order in which the writes and read are done changes when I enable optimization in the compiler. Is there a way to solve this without the need to disable the optimization? I don't want t...