I want to convert (OMRON ELECTRONIC COMPONENTS D6T-8L-06) Heat Sensor's output which is in I2C format via STM32f4 to CAN. And i want to do this conversion in Matlab Simulink using Waijung Blockset. i am able to read the sensor but there is no conversion technique available for STM32f4. This CAN message will be further utilized in XPC target PC
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So I'm building a device to measure pressure in a clean room and using a Raspberry Pi Pico with a pressure sensor. I'm writing the code in Micropython and while the sensor is designed to be used right out of the box, I'm interested in how I use the device registers to modify it's operation (as well as other peripherals I have attatched). I understand the registers are 8-bit and how how the hex translates to binary and back. However, the code for the lists all the editable registers and their hex addresses but I have no idea how to modify the bits to turn off/on the features represented by each bit.
Does flipping each bit on/off just change the binary and thus changes the device register hex?
Thank you!
In my project, I am using Winbond W25Q64 64-MB Serial flash, When i read datasheet of this serial flash there is two type:
SPI(W25Q64 FLASH ID :- 0xEF4017) and QPI(W25Q64FV FLASH ID :- 0xEF6017).
I know SPI very well, but first time i heard about QPI. So i have some Questions-
1.What is the difference's between SPI and QPI?
2.Can i use QPI communication type Flash(using SPI)?
3.What is the main feature's of QPI and what is QPI(a Communication Protocol or something else)?
Description of the QPI protocol is part of the datasheet (I have added the link into your question).
Judging from the description there, it does use four data lines for I/O (in contrast to SPI where one line is designated for input and another for output), thus saving clock cycles (compared to standard SPI) as one byte can be transfered in 2 cycles only. Available commands seems to be different too compared to SPI mode.
This chip supports some "extended" SPI modes (called Dual and Quad SPI) where more data lines are used for sending data to master. These are triggered by standard SPI command, but data transfer differs. See the details in the datasheet.
It is not compatible with "standard" SPI, and I am not sure if there is any common MCU supporting this mode. It looks similar to the SD card / SDIO, but I have no idea how much is it (dis)similar.
Yes, you can. The standard SPI (one input and one output data line) seems to be the default interface. The extended SPI modes are used in response to particular SPI commands only and the QPI mode has to be explicitly enabled by respective SPI command (see figure 3 in page 12).
In addition:
Quad SPI and QPI instructions require the non-volatile Quad
Enable bit(QE) in Status Register-2 to be set. When QE=1,
the /WP pin becomes IO2 and /HOLD pin becomes IO3.
...
QE bit is required to be set to a 1 before issuing an “Enable QPI
(38h)” to switch the device from Standard/Dual/Quad SPI to QPI,
otherwise the command will be ignored. When the device is in QPI mode,
QE bit will remain to be 1. A “Write Status Register” command in QPI
mode cannot change QE bit from a “1” to a “0”.
Advantage is faster data transfer at the same clock frequency. Details of the protocol are well described in the datasheet including timing plots etc.
I am using a Sparkfun Electret Microphone with Arduino Pro-Mini to stream audio over serial port. The goal is to create a wav file from the audio data.
The wav file header requires "sampling frequency" as one of the entries in the header. Here are my questions:
How can I check what is the current audio frequency of the analogReads from the microphone on my arduino
How can I configure/change some settings in my arduino pro mini to get a sampling rate of 16 kHz (that's what one of my applications that will consume the WAV file requires)
Well, sampling frequency is all about timing.
1) use micros() statements to check the timing of the analog read operations
2) the best way to get a consistent sampling rate is by using interrupts. Specifically, a "timer interrupt". You will have to make sure that the hardware can actually sample fast enough to keep up with the audio requirements.
I have a sdr-device, an Ettus USRP B200 and I was given the task to convey information from the audio file on the air . I have tried to do this through the program SDR#, but it only works on reception.
How can I achieve audio transmission?
The USRP is a kind of universal transmitter; it doesn't take audio and does a specific kind of modulation to transmit it over the air, but it takes complex samples representing a base band signal that represents the signal as you want to transmit it at the radio frequency.
You will have to use some kind of modulator that converts your audio file to a transmittable complex baseband signal.
Typical analog radio stations use FM (Frequency Modulation). There's plenty of options out there, but I would try to get the GNU Radio live DVD, which comes with GNU Radio, and that has examples how to do FM transmission. It's really not that hard to create a FM receiver, and a transmitter is equally simple.
I'm using a 12-bit Linear LTC2631 DAC, and wish to convert my PWM signal to an analog one via I2C. I am currently not able to come up with an algorithm, and how would the the DAC need to programmed to take in the PWM input and then generate an output. I'm using a Pro Micro 3.3V board.
Any help would be appreciated, including stuff over the internet which I could read up?
Thanks!
If you're going to use an I2C DAC IC like the LTC2631 you don't need PWM at all. You just pass a binary value to the IC via I2C and it will be converted to an analog voltage.
If you want to use PWM to generate an analog signal you might want to filter the output so it doesn't look all square. Take a look at:
http://interface.khm.de/index.php/lab/experiments/arduino-dds-sinewave-generator/
and:
http://www.avdweb.nl/arduino/hardware-interfacing/super-simple-dac.html
Best.
Yes, if you have PWM signals then you don't need to have a DAC at all.just attach a low pass filter after PWM and you will have analog signals.
But if you want to use any I2C DAC you can just provide it binary numbers and it will automatically convert into analog signals.
PWM and DAC both are different method of generating analog signals you don't need to combine it.