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Recent content by electrodarkness

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    Please help with ZYNQ custom AXI slave UIO driving on Linux.

    Hello everyone! I've got a ZYBO devboard, and I've loaded an SD card with MainLine Linux 4.9.51 kernel with Xenomai patch, uBoot(with SPL), an FPGA bit file which contains some AXI Slave GPIOs, and a custom PWM driver with AXI Slave interface. I've modified the generated device tree to use the...
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    Please help with setting up UART TX with DMA on dsPIC33EP256GP506

    Hello everyone! I want to create a DSC system on which I can test signal processing algorithms, but first, the data acquisition must be done. I have a Microchip Explorer board 16/32 with dsPIC33EP256GP506. The signals which I will be working with have a maximum frequency of 1700Hz, so I need an...
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    [SOLVED] Resolving programming problems of PIC18F2550.

    Ok guys, I'm back with new information. The short version is: sometimes I'm dumb. Someone (or me) swiched compartiments in the IC drawer, , and I used a PIC16F876A instead of 18F2550 without checking. Fortunately now the circuit works. I have to work on my routines. One last question. If I use...
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    [SOLVED] Resolving programming problems of PIC18F2550.

    It's definitely not a 18C858. So I will try somehow to desolder the PIC, and to take it out of the board without removing my display. If it's damaged, I will get a PIC16F1513 or 1713 since they are pin compatible but cheaper.
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    [SOLVED] Resolving programming problems of PIC18F2550.

    Thanks, but I forgot to mention, the capacitors under the switches aren't populated yet. I will enable the weak pull-ups if I manage to program it :p.
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    [SOLVED] Resolving programming problems of PIC18F2550.

    Hello everyone! Recently I stumbled upon a PIC18F2550 on my shelf which was used only a few times in some prototypings, and I wanted to create an Oven temperature controller. I've designed the board (attached the schematic), populated it, and wanted to program the mcu. The only problem was...
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    Please help creating proper filters in HLS/System generator!

    Hi everyone! I wanted to design some digital filters for an ECG device based on Zynq SoC. Since The device works with 24bits of data, I can't use the FIR block present in System generator. So I designed a low-pass 65th order FIR filter with 250Hz cutoff frequency, and a 2nd order band-stop IIR...
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    Please help with booting Linux on Spartan 6 FPGA.

    Hi everyone! I had a semester of embedded systems class where we created and worked with Linux on Zynq7010 SoC. Since I had a Spartan 6 devboard, I wanted to embed a Linux on it. I've created the Microblaze processor in XPS (see attached .mhs file), and made some tests in SDK - Hello World...
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    [SOLVED] Please help with VHDL UART packet sending

    Thanks FvM! After removing the mentioned reset, it works ( it seems I'm still stuck at the uC level sometimes). Now I will optimize the design as you suggested.
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    [SOLVED] Please help with VHDL UART packet sending

    I'm back again. I managed to write a working UART, which sends data embedded in a protocol to an android device (via Bluetooth), and I can receive and plot the data ( only a sine from LUT). Now I'm struggling with the SPI protocol. the SPI block contains a TX and RX shift register, a divider...
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    [SOLVED] Please help with VHDL UART packet sending

    Thanks again FvM! I will remain at the Double Dabble conversion since I will use at least one adaptive FIR, LSE and covariance calculation - hopefully all in real-time, so effectiveness is a key to this design.
  12. E

    [SOLVED] Please help with VHDL UART packet sending

    Data transmission is started with uart_data_in_stb <= '1' and when the data is sent the uart_data_in_ack becomes '1', but you are right, I was only stopping the strobe bit when the UART was busy, the data counter was still working. Now I have a general idea, I will be back with the results...
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    [SOLVED] Please help with VHDL UART packet sending

    Hi everyone! I'm designing a signal acquisition board with FPGA. For the FPGA -> PC communication I'm using UART protocol. The UART design is working, I've tested it with a simple echo loopback. Next I wanted to implement a protocol to send data : S D3 D2 D1 P \r \n, where Dx are decimal...
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    Please help me with I2C communication between LCD and PIC!

    milan.rajik In proteus indeed I'm using I2C/SPI debugger, but I'm also testing it on The finished hardware. I attached the proteus and MPLAB projects. Easyrider83 Thanks for the code, I think I didn't put testing in cycle after sending data. I will try it as soon as possible.
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    Please help me with I2C communication between LCD and PIC!

    HI everyone! I want to develop an interface for a project. On this Interface There is an I2C 2x16 LCD (attached datasheet), SPI communication with main board,UART for debugging. The micro controller used is a PIC18F26K22 (attached schematic). The problem is, the LCD won't display...
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