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Recent content by yoramgr

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    Electronics Design Freelancer

    Thanks for your comment, I've updated my profile. Though it's becoming a global village (in addition to local projects, I've delivered a project to someone in USA, and discussing projects details with guys from UK, India and Australia), I agree it may be more convenient to know where is my base.
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    Electronics Design Freelancer

    Yoram Grinberg, Electronics Engineer (B.Sc) Working as a freelancer, I provide electronic design services, including: • Prototype design and build for a new product. • Improvement of existing product. • Sub-system of a product. • FPGA design. I am multidisciplinary...
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    Can iPhone 4G act as a USB Host via its docking connector?

    Anyone knows if iPhone can be a USB Host, so that I can connect a USB Device to it's connector (more specifically, I want to connect a HID, like a keyboard)?
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    Digital controlled AC current source design ?

    How about an H-bridge configuration, directly controlled by the microcontroller? With a timer interrupt or PWM type of outputs (at 50% duty cycle), you can easily control the frequency in the range you mentioned. You can add a fixed current limiter (300mA) at the supply of the H-Bridge. If you...
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    How to Read a file into verilog test bench and pass it to the verilog code

    if you mean storing something from Verilog test-bench into a file, then try: $writememb("test_bench_output_im_b_x.txt", im_b_x);
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    How to Read a file into verilog test bench and pass it to the verilog code

    1. To actually store the data in the array, I think you better define im_r as reg, and not as wire. 2. In the fopen line, there is a space in the filename (between "image_r.tx" and the "t"). 3. There is a common confusion with "binary" contents of a file. When you open image_r.txt file with a...
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    DTMF decoding on pic24

    How about a dump of the unsigned char samples[GOERTZEL_N] ?
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    DTMF decoding on pic24

    If it is coaxed all the way from the generator to near the input pin, I guess no much noise. Just to debug it, and to make sure it is not a sampling or noise issue, I would suggest uploading the samples from the PIC to a PC, put in Excel sheet and draw the waveform, to see if it makes sense...
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    DTMF decoding on pic24

    Without referring to the algorithm, some hardware issue: did you put an RC low-pass filter close to AN6 pin, to filter out noise above half the sampling rate?
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    How to Read a file into verilog test bench and pass it to the verilog code

    Well, you can always gather all the information in one file, first third of the file will hold R values, second third will hold G values, and last third will hold B values. Total: file will hold 331776 values (288 x 384 x 3). In Verilog, define 3 arrays of 2D, and 1 array 1D: reg [7:0]...
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    How to Read a file into verilog test bench and pass it to the verilog code

    You can define 3 arrays, each 2D (assuming 8 bit for each element): reg [7:0] mem_R[0:287][0:383]; reg [7:0] mem_G[0:287][0:383]; reg [7:0] mem_B[0:287][0:383]; prepare 3 files and try to readmemh 3 times. I'm not sure about the file data order (row by row or column by column), but you can try...
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    Electronic Design Freelancer

    . . . . . .
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    Noob question regarding a camera to LCD display interface

    A microprocessor may be good for initializing the camera and LCD, control the motors, and take care of the user interface (control buttons?), but the video itself should be transferred from the camera to the LCD by hardware (in between them, some interface logic / LCD controller may be needed)...
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    Is this rs232 waveform correct?

    Are the waveform screenshot and hex terminal screenshot: 1. both taken from simulation, or 2. the waveform taken from simulation and terminal taken from real processor transmission? if (2) is the case, then you need to use a scope to check the waveform. my guess is that the transmitter somehow...
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    VGA colors with Spartan 3E

    Which VGA controller is it? Do you have datasheet? Schema of this Spartan 3E board?
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