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Re: Communication Problem:: RS-485 (MASTER) and RS-485(SLAVE
You don't change the direction of data flow. DE is active high, and RE is active low. When you are transmitting, you need to drive pin rc5 high. When you are receiving data, drive pin rc5 low (not tristate, but drive).
On the scope...
Re: Power line interrupt
Need more info about hardware. Please send any schematic.
But, for the first look, try to change hardware to generate interrupt on high->low edge, or low level. When the power is falling, there may be not enough voltage to generate high state.
Regards.
Re: Communication Problem:: RS-485 (MASTER) and RS-485(SLAVE
When I've used RS-485 for long distances, I have not used terminators (works bad with them, especially when there are more than two devices connected to the line), but rather weak pullups on D+ and weak pulldowns on D- (about 100k)...
Re: how to use MMC card
Look at datasheet of microcontroller with Multimedia Card Interface(ie: ARM from AVR: AT91SAM7A3). There are some examples on their www also.
Hope it's help.
Regards.
It depends on model of the UPS. Some of them can start without poweer supply, some of them can not.
But there is still problem of costs. Studio lights have big power requiremenst (I think it's hundrets or maybe thousends watts). Standard computer UPS (1kW or 2kW) can supply your lights only for...
tms470 arm
Hi
I want to use IAR for program and debug that controller.
Please tell me something about ISP (in-system programming). I heard the word "wiggler", but I'm not sure will it work with IAR?
Maybe someone could upload any schematics, links etc?
Thanks in advance for any hejp.
Re: Analog signal < 10kHz
There is Nyquist law: sampling frequency should be twice signal frequency to exact rebuild sampled signal.
Practically, for better performance, for signal 10kHz use sampling frequency bigger than 20kHz, maybe 25-30kHz.
msp430 mit comparator c code
I have made some projects with MSP430F149 and AVR ATmega128L
MSP430:
- 16 bit bus
- hardware MAC
- EM Compatibility - is better than AVR
- max 60kB Flash memory
- max 2kB RAM memory
- lower power consumption, more low power modes
- low cost JTAG debugger
- ADC 12bit...
Re: C or Assembly
If you very good know the CPU, you can make code in C only a bit slower than in assembly language.
Also, working with C, you can easy migrate to other CPU.
I'm using assembly language only in DSP processors.
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