I have this love-hate relationship with TI's documentation. On one hand, once you understand a module, you can use it on any micro. On the other...

I have this love-hate relationship with TI's documentation. On one hand, once you understand a module, you can use it on any micro. On the other hand, the cross-referenced docs are usually inconsistent and /always/ very confusing. (I still haven't worked out how to connect, let alone use, the sigma-delta ADC, and every time I try to use a timer on an MSP430 I wind up playing with clock contro...

An embedded project I'm working on requires the ability to read the status of up to 64 input ports - but obviously I want to use as few of my...

An embedded project I'm working on requires the ability to read the status of up to 64 input ports - but obviously I want to use as few of my microcontroller pins as possible. Somewhere I heard of devices called 'sequencers' or something like that where you just feed it a clock signal and it turns on individual i/o pins in order and then wraps around to pin zero again (or is reset with a thi...

I was looking at the Atmel AT91R40008 for a new design. However I realised it dosen't support I2C. Does anyone have a recommendation about...

I was looking at the Atmel AT91R40008 for a new design. However I realised it dosen't support I2C. Does anyone have a recommendation about how to interface a real time clock, and maybe a serial eeprom. Is an I2C bus master a sensible approach, perhaps from Philips? The main objectives are low cost and good availbility. regards, Johnny.

Hi, I ask me what is the cheapest micro capable of running (?C)Linux. I know many ARMs, H8, Motorola Coldfire... Is there anything else? What...

Hi, I ask me what is the cheapest micro capable of running (?C)Linux. I know many ARMs, H8, Motorola Coldfire... Is there anything else? What derivat is suggested? No special needs for power consumption, clock/MIPS, integrated peripherials. Thanks! Andreas

I'm feeling stupid - I'm having difficulty finding power consumption info for the Z8 Acclaim devices. As far as I can see, the spec docs on...

I'm feeling stupid - I'm having difficulty finding power consumption info for the Z8 Acclaim devices. As far as I can see, the spec docs on the Zilog site have a big "TBD" printed where the graph of consumption vs. clock frequency is supposed to be. Can you point me in the right direction? Thanks!

I am currently working with a range of peripherals whos control lines look remarkably like an I2C interface. The data sheets go into great...

I am currently working with a range of peripherals whos control lines look remarkably like an I2C interface. The data sheets go into great detail about how the data and clock line are used to communicate with the device and how it has an own 'address' so that you can differentiate it from other devices etc....... Why not just say that it's an I2C comptable device FFS. Do they have t...

Hi, I'm having trouble doing a simple character transmission on the MSP430F149 UART. I'm using SoftBaugh's ES149 eval board...

Hi, I'm having trouble doing a simple character transmission on the MSP430F149 UART. I'm using SoftBaugh's ES149 eval board w/ICC430 compiler. The board has a 32768 Hz clock. I've verifed that it runs through the program. When I probe at pin UTXD0 with an oscope, all I see is a high signal. Can anyone help? Thanks, Valerie #include void main() { //

Hi all I am using ATmega128 controller and using i2c bus eeprom to increase its memory space . I have i2c header file in my codevision avr and...

Hi all I am using ATmega128 controller and using i2c bus eeprom to increase its memory space . I have i2c header file in my codevision avr and i used them and change that accordingly but when i m reading my eeprom i m geting nothing i think that my code is either not able to generate the clock pulse or not able to write the data into eeprom i m not getting ,how to genrate the clk ? #in...

Hi All, I have a few questions on implementation: P.S. I have read the manual closely. 1. How does the real time clock keep time during power...

Hi All, I have a few questions on implementation: P.S. I have read the manual closely. 1. How does the real time clock keep time during power cycles ? 2.I want to run my code in flash, i think these days it is fast enough, know it is only 16 bit and must use thumb mode on compiler. What othe problems will i not like ? 3. My RAM memory will be SRAM which again is only 16 bit and must b ba...

Hello: What is the latest RTC code anyone could recommend for the PIC (16f) family? My requirements are simplicity and low power, with LCD...

Hello: What is the latest RTC code anyone could recommend for the PIC (16f) family? My requirements are simplicity and low power, with LCD display and perhaps RS232 interface. Is the Microchip AN582 as good as it gets? Thanks, TomC

If a I2C master is in the middle of communications transfer with a slave and the slave suddenly resets or hangs, how can the I2C master regain...

If a I2C master is in the middle of communications transfer with a slave and the slave suddenly resets or hangs, how can the I2C master regain control of the bus, and how can it prevent from 'hanging' when the slave keeps clock stretching? -=- This message was sent via two or more anonymous remailing services.

I have an LPC3180 header board that needs 10MHz+ crystals to run per spec. I plugged in a ~2MHz crystal and it ran, as slow as expected. I've...

I have an LPC3180 header board that needs 10MHz+ crystals to run per spec. I plugged in a ~2MHz crystal and it ran, as slow as expected. I've underclocked PIC parts down to being static, even using a button as a clock. Can this be done with ARM MCUs? Can this be done with ARM MCUs interfaced with SRAM chips?

We're having a problem getting the SMSC LAN91C111 to work on one of our ColdFire boards. We can access memory-mapped MAC registers, but we can't...

We're having a problem getting the SMSC LAN91C111 to work on one of our ColdFire boards. We can access memory-mapped MAC registers, but we can't get the serial Management Interface to the PHY to work. Selecting the external PHY connection to break our MI signals out, everything looks fine on the scope, right number of clock pulses etc., etc. Am I missing something obvious? Cheers TW

Programming a somewhat compute-intensive and time-critical application on an embedded ARM-9 system, running Linux. I need a clock in the low...

Programming a somewhat compute-intensive and time-critical application on an embedded ARM-9 system, running Linux. I need a clock in the low tens of milliseconds for triggering synchronous functions, ie. while (1) { if Timeout (say 30mS) { reset timer do some stuff } } The standard Linux itimer functions and callback mechanism will s...

Hi I am new to UTOPIA interface. I would like to know how critical it is to have matched lengths for UTOPIA data and clock traces on PCB...

Hi I am new to UTOPIA interface. I would like to know how critical it is to have matched lengths for UTOPIA data and clock traces on PCB with multiple processers (all processer having UTOPIA interface). It would be nice if somebody could reply as soon as possible. Regards Nithin

Hi, i want your opinion about this code for PIC24FJ32GB002...I want to use internal FRC for bus clock at 8MHz and obtain a PWM output...

Hi, i want your opinion about this code for PIC24FJ32GB002...I want to use internal FRC for bus clock at 8MHz and obtain a PWM output at 150KHz...this is my first pic code and i can't test it (i haven't any evalboard)...what do you think? This is my code #include #define DEBUG _CONFIG2(IESO_OFF & FNOSC_FRC & POSCMOD_NONE) _CONFIG1(JTAGEN_OFF & ICS_PGx2 & FWDTEN_OFF

Hi there, we have an ICE subsytem with the following pins: - CK (clock) - DO (data out) - DI (data in) - EN- (enable) - RST-...

Hi there, we have an ICE subsytem with the following pins: - CK (clock) - DO (data out) - DI (data in) - EN- (enable) - RST- (reset) The text in parentheses is our forecast meaning of the pin, while the uppercase acronyms are their names as reported in the (few) technical notes we have. Each pin has the "ICE" prefix, so we know this is a generic In-Circuit Emulator. The datashee...

Hi, I have a problem with a timer interrupt on a CC1110 (8051 with wireless interface) that I have been staring at for an hour with no...

Hi, I have a problem with a timer interrupt on a CC1110 (8051 with wireless interface) that I have been staring at for an hour with no success. 8051 is not a strength of mine so I would appreciate your comments - Given the (very!) simple program: char x; int main( void ) { char c = 0; ____IEN0 &= ~pdBIT_7; ____SetClockSource(); // Setup processor clock. ____vInitTimer3( 100...

I'v got a mips SoC running Linux kernel, 16(maybe 32 if i sacrifice some memory) GPIO pins sitting bored (16 can initiate interrupt). There is...

I'v got a mips SoC running Linux kernel, 16(maybe 32 if i sacrifice some memory) GPIO pins sitting bored (16 can initiate interrupt). There is also UART port (22MHz clock = very fast, 40ns cycles). I'm evaluating my options about using them : -IDE/CF interface -SD/MMC interfase ? -Camera -LPT (printserver) -USB host controller ? -... ? I would love to see such a project with a sam...

Hello, i am in the need to capture around 10 seconds (ok, 5 to 8 seconds would also be enough) with 25 MSamples / s. Each sample should be 4...

Hello, i am in the need to capture around 10 seconds (ok, 5 to 8 seconds would also be enough) with 25 MSamples / s. Each sample should be 4 to 8 digital lines. It would be nice if i can use an external clock. But how to do this ? The amount of data for 10s * 25 MSamples / s * 1 Byte = 250 MByte. So it is not a small amount !?! So at the moment i have 3 ideas to solve this: 1) FPG...