JRys
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Everything posted by JRys
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Drawing or CAD for ACC-205 DIN Rail Kit
JRys replied to Javier ASE's question in Measurement Computing (MCC)
Please review page 18 in the user manual for case dimensions and the attached files for the ACC-205. The ACC-205 kit includes a set of 4-20 x 5/16" screws used to mount the bracket to the existing holes on the bottom of the E-1608 case. ACC_205_DIN_clip_50mm.pdf MCC_ACC-205-assm_50mm-l_din_clip_4-hole_asm.stp -
Information about how to repair a USB-TC is not readily available, but I might be able to have them repaired. Please send me a private message with both device serial numbers and your phone/email/shipping address. The repair process takes 4-5 weeks. If it can be repaired, my customer service department will contact you.
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You can add (+) another AXI GPIO to your block diagram, similar to how it was done for the button in https://digilent.com/reference/programmable-logic/guides/getting-started-with-ipi. Name the (make) external connection pio instead of btn. Constrain the desired IO pins as pio_tri_io[0]...pio_tri_io[7]. Name the block AXI_GPIO_PIO and finish the build by running block automation. Follow the guide to create the HDL header, generate the bit stream, and export the design wrapper. In your SDK app, add the following, like it was done for the buttons and LEDs. #define PIO_ID XPAR_AXI_GPIO_PIO_DEVICE_ID #define PIO_CHANNEL 1 #define PIO_MASK 0b11111111 cfg_ptr = XGpio_LookupConfig(PIO_ID); XGpio_CfgInitialize(&pio_device, cfg_ptr, cfg_ptr->BaseAddress); XGpio_SetDataDirection(&pio_device, PIO_CHANNEL, 0); //output //update the first eight GPIOs. XGpio_DiscreteWrite(&pio_device, PIO_CHANNEL, pio_data);
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USB-1608GX: 16-bit, 500 kS/s Multifunction DAQ Device
JRys replied to Matthias M's question in Measurement Computing (MCC)
The USB-1608GX-OEM board was discontinued and is no longer available. The recommended replacement is the USB-1608GX-2AO-OEM. -
The BASYS 3 FPGA board has a 100 MHz system clock, so updating the PMOD interface at 25 MHz should be possible.
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The USB-231 does not have PWM support, so no. Instead, please consider a USB-1608G or a USB-1808X. These two devices have a timer output that can be used for PWM.
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USB-1808x High Speed DAQ - Counter Function
JRys replied to K-Y's question in Measurement Computing (MCC)
The counter input uses a 50 MHz clock (20nS per tick) and counts repeatedly from the leading edge of your sensor's signal to the next lead edge. At 112,000 RPM (784k Hz), the ideal count is 63.75, 784,000 Hz. However, in the real world, the count may be only 60 or 833,333.3 Hz. There will be more errors in the upper frequencies because the counter input has less time to count. With that said, could you review the attached VI? It will demonstrate a better (more straightforward) way to measure frequency. You can ignore the counter output (TMR0) I used for a test signal. ULx Meas Dig Freq-Buffered-Cont-test.vi -
PostView - Active Device not recognized
JRys replied to Jay Bland's question in Measurement Computing (MCC)
No charge, use the following public activation key: ALYGP-Q889C-TY5X6-MZFWM-75LLG- 14 replies
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- iotech
- personal daqview
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PostView - Active Device not recognized
JRys replied to Jay Bland's question in Measurement Computing (MCC)
The PersonalDaq 54, 55, and 56 were discontinued, and no newer version exists. The recommended replacement is the USB-2408-2AO. However, it uses the DAQami software and does not have frequency inputs.- 14 replies
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Both LabVIEW and Python are programming environments that can automate a process. If you are unfamiliar with either one, consider the DASYLab BASIC ($1,299.00) software, which has a shorter learning curve.
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USB-1808x High Speed DAQ - Counter Function
JRys replied to K-Y's question in Measurement Computing (MCC)
With seven pulses per sensor revolution, 13,000 pulses per second is approximately 1800 RPM. On the other hand, RPMs up to 112,000 would be 784,000 pulses per second. Could you confirm the sensor's RPM range and the number of pulses per revolution? -
If your budget is tight, consider the free Community version of National Instruments LabVIEW. Our LabVIEW support for the Counter Input has a timed mode. It can measure frequency in timed mode by counting pulses over a desired period. For instance, if the period is one second and it determines that 100 pulses have occurred, then the frequency is 100 Hz. Another approach is to create your own Python script to do what you want.
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Using 12-volt power, you do not have to do anything with the Scaler resistor. It will override our resistor because it has a much lower value.
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mcc172_a_in_scan_status does not always return samples_per_channel
JRys replied to Martin Wollatz's question in Measurement Computing (MCC)
Use mcc172_a_in_scan_start first to start the acquisition, then use mcc172_a_in_scan_status to determine the number of samples in the buffer. Study the attached C program. It requests 256 samples and displays the loop execution time, samples read, channel 0, channel 1, and the number of samples left in the buffer after the read. continuous_scan2.c -
The USB-2416-4AO counter input has a pull-up resistor, so an external one is unnecessary. Connect the Scaler's +Output to the counter input and the -Output to the ground.
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Use the following download for LabVIEW 8.5 support. https://files.digilent.com/archive/MCCDAQ_CD/Archive_6.35/mccdaq.exe
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I checked with my manufacturing department about your device. It was discontinued in 2016 and never put into production at Measurement Computing, so I'm sorry to say it is not eligible for repair.
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Please review the following forum thread regarding Raspberry PI 5 support.
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PostView - Active Device not recognized
JRys replied to Jay Bland's question in Measurement Computing (MCC)
The PersonalDaq 54, 55, and 56 do not support Windows 10 or 11. However, some of our customers have found ways to make them work. One tip I have found is to ensure the computer's hardware has the latest updates from the manufacturer. This is especially true for new computers, which often ship with outdated firmware. I have also found that some manufacturers do not make drivers available for Windows 10 or 11 that run on older hardware. I have a Dell Precision 5820 desktop with Windows 11 that works with the PersonalDaqs, so it can work.- 14 replies
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Need detailed information on GND and AGND on the USB-1808X card
JRys replied to Per's question in Measurement Computing (MCC)
I apologize for the late response. GND and AGND are connected on the PCB board. However, the AGND path is meant for analog grounds only. Digital grounds tend to have switching noise, and running separate paths reduces overall measurement noise. On the other hand, a ground loop can appear as a noisy signal. If you suspect a ground loop, use a differential connection instead of a single-ended one. -
Hello, I've tested the emacspif_speed.c file patch with Vitis 2022.1 and 2023.1 using a Zybo Z7-10 Ref F chip. At first, it didn't work for me, but it was because I applied the patch after I created and built the project. I thought I could just rebuild the project for the patch to work, but it failed. The solution I found was to make a new project. Attached is the patch file I used. Change the extension to .c and copy it to: C:\Xilinx\Vitis\2021.1\data\embeddedsw\ThirdParty\sw_services\lwip211_v1_7\src\contrib\ports\xilinx\netif\. Best regards, John xemacpsif_physpeed.txt
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We recommend the USB-2408-2AO and the free DAQami software.
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Hello, To determine the key being pressed, you must set each column line low one at a time while simultaneously reading the rows. Review the following article to get an idea of what is needed to read the key and update the display: https://fpgacoding.com/pmod-keypad-peripheral-first-look/. Their method uses a counter to create a one-millisecond delay between setting each column low, one at a time, while reading the rows. Best regards, John
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The driver issue could be caused by the hardware no longer functioning correctly. Unplug the USB connection, then restart Windows. Plug it back in and try again. If it is in working order, Windows will reinstall it. If not, let me know the device's serial number, and I will see if it can be repaired.
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To extract data from .hpf file
JRys replied to rakeshaashay's question in Measurement Computing (MCC)
There are no example programs that show how to read the HPF file, but an end user did attempt it. https://github.com/jogrundy/Read_QuickDAQ_.hpf/blob/master/read_hpf.py Attached is the file format document. HPF_High_Performance_File_specification.doc