Just HOW does the gputils linker allocate the program memory?

Started by Johann Klammer in comp.arch.embedded1 hour ago 1 reply

Hello, I have been writing a larger project and seeing huge gaps in the map file(0x374-0xe00). I've put all the regular code in PGM CODE...

Hello, I have been writing a larger project and seeing huge gaps in the map file(0x374-0xe00). I've put all the regular code in PGM CODE sections But some things needed specific addresses... in main.asm I have: ... DEVID CODE (with a matching section in the linker file) .. vectors CODE 0x00 .. PROG0 CODE ... in cmd.asm I have: PROG0 CODE ... in trig.asm I have: PGM CODE...


$0.03 microcontroller

Started by Clifford Heath in comp.arch.embedded3 days ago 82 replies

OTP, no SPI, UART or I²C, but still... Clifford Heath

OTP, no SPI, UART or I²C, but still... Clifford Heath


24C16A EEPROM programmer

Started by pozz in comp.arch.embedded4 days ago 1 reply

I have some 24C16A to program. I have a working 24C16A to clone. What is a fast and cheap way to proceed? I need a software and an hardware...

I have some 24C16A to program. I have a working 24C16A to clone. What is a fast and cheap way to proceed? I need a software and an hardware interface (USB to IIC or RS232 to IIC). I have a PicKit2, but I'm not sure if they can be used to program IIC EEPROM. If yes, what is the software to use? I could write a simple firmware for an MCU with IIC that connects to a PC (via RS232 or...


Supermicro server motherboards with hardware backdoor?

Started by Clifford Heath in comp.arch.embedded1 week ago 36 replies

Whether it turns out to be true or not, this will be the biggest security blockbuster of the decade. Clifford Heath

Whether it turns out to be true or not, this will be the biggest security blockbuster of the decade. Clifford Heath


How do you read digital inputs from microswitch, jumpers, dip-switches...?

Started by pozz in comp.arch.embedded2 weeks ago 27 replies

Often I have digital inputs connected to switches managed by the user. For example: microswitches, tactile switches, push-buttons,...

Often I have digital inputs connected to switches managed by the user. For example: microswitches, tactile switches, push-buttons, dip-switches, simple jumpers and so on. What is your preferred method to read the status of this inputs? I usually arrange a debounce method for reading push-buttons and similars (tactile switches, micro-switches...) and I know there are many (many many) ...


arm-gcc: pointer to constant string

Started by pozz in comp.arch.embedded3 weeks ago 60 replies

--- 1.c --- void foo(void) { dummy("hello"); } --- 2.c --- static const char *s; void dummy(const char *ss) { s =...

--- 1.c --- void foo(void) { dummy("hello"); } --- 2.c --- static const char *s; void dummy(const char *ss) { s = ss; } "hello" is a constant string declared inside function foo(). Is there a guarantee that his pointer (passed to dummy()) is valid after exiting foo()? In other words, is the string on the stack (in this case it will not be valid after foo()) or in F...


chip that can do audio over IP

Started by Anonymous in comp.arch.embedded4 weeks ago 8 replies

Hi I'm a software engineer wondering about a hardware solution. We currently have a product that uses an ATA to convert audio to IP to send to a...

Hi I'm a software engineer wondering about a hardware solution. We currently have a product that uses an ATA to convert audio to IP to send to a remote device where an ATA converts digital back to audio. We dial the ATA to tell it where we want the audio to go. We need to allow up to 63 remote devices to simultaneously receive one-way outgoing audio (speech and maybe background


clock synchronization over IP

Started by Anonymous in comp.arch.embedded4 weeks ago 36 replies

We need to synchronize clocks (so we can synchronize audio) on physically separated controllers that are connected via ethernet that may or may...

We need to synchronize clocks (so we can synchronize audio) on physically separated controllers that are connected via ethernet that may or may not be connected to the internet. The controllers have ARM9 LPC3250 SOM and embedded Linux. We need to synch with no more than 50 ms difference but preferably less. Synchronization needs to continue working between any two controllers reg


Speth email change

Started by John Speth in comp.arch.embedded4 weeks ago 5 replies

Lance and ROI- Nancy and I are changing our primary email address. Our new primary email will be "johnspeth@yahoo.com". We'll keep the...

Lance and ROI- Nancy and I are changing our primary email address. Our new primary email will be "johnspeth@yahoo.com". We'll keep the present Frontier email address for overlap for a month or two then our Frontier email address will no longer work. I've already changed it for TDA. I tried to change it for Morningstar and it wouldn't allow me because it said "johnspeth@yahoo.com...


Conference call over VOIP

Started by gp.k...@gmail.com in comp.arch.embedded4 weeks ago 3 replies

I asked a related question repeatedly but I have a slightly simpler question. We have a bunch of controllers running embedded Linux and...

I asked a related question repeatedly but I have a slightly simpler question. We have a bunch of controllers running embedded Linux and connected via ethernet. We need to provide conference call audio between up to six parties where all callers can hear each other. We need a solution that doesn't depend on a niche product that might not be around for long. Are there any sugges


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