Raspberry Pi Forums

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I have a temperature sensor with accuracy that can vary +/- 1deg celsius. I would like to do some form of calibration. To do this, I need a surface with a stable temperature reference. Has someone done something similar in the past? The problem I have now is how to get a surface with a stable temper...

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joan wrote:You can store the boot files wherever you want. The Pi only boots from the SD card slot pins though so you'll need to emulate a SD card if they are not held on a SD card.

But is the filesystem to store the boot files restricted to vfat? Is this the reason why boot partition must be vfat?

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Hi rpdom,

Once again, I thank you for answering my question.

If the Broadcom MCU is hard-coded to read certain boot files from SDcard upon boot-up, does it mean that the boot files must be stored on SDcard? No other storage medium is possible?

Thank you.

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Hi rpdom,

Thank you. You have been most helpful.

helpme

For bare metal programming (writing directly into registers), which is the recommended compiler/IDE for RPi? Still puzzled without an OS in the first place, how can a bare metal program be read on the SDCard by RPi? My experience on other MCUs (Arduino) is that for bare metal software, they are usua...

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I understand Raspbian is GPL. But what about the python scripts developed on Raspbian on RPi? Are the scripts also subjected to GPL?

Thank you.

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The easiest thing to do, which is quite common, is to move the main Linux (root) partition off the SD card and onto a USB stick or USB disk drive. You just need to leave the boot partition on the card and that hardly ever gets written to, and make a simple change to /boot/cmdline.txt. Running with ...

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I beleive copyright / licensing (GPL) is the main hurdle if the RPi is to be integrated into another product for commercial purposes. I believe this should not be a problem if one is writing python application scripts on RPi. GPL applies for the operating system but not on the apps written on the OS.

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I am very pleased with Raspberry Pi. I am even more pleasantly surprised that RPi has passed FCC and CE certifications. Is it necessary to have a development board to pass FCC/CE? Since it has already passed FCC/CE, can someone integrate this board inside a product for sale? Any restrictions? Thank ...

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I am able to find the BCM2835 peripherals datasheet but not able to find the datasheet of the MCU itself. By the way, I am quite surprised by RPi's choice of MCU. Not because it is bad but because RPi is open-source and Broadcom is stuck-up to customers who are not big, speaking from personal experi...

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Is it possible to run RPi on write-protected SDCard? The reason is that write-protected SDcard will prevent filesystem corruption which is an irritating problem. For writing files, a portable storage device can be attached to the USB port.

Do you think the above idea is workable?

helpme

Are there python libraries for controlling hardware ports like i2c and spi on the Raspberry Pi? Besides i2c/spi masters, is it possible that there are libraries that allow us to use Raspberry Pi as i2c/spi slaves?

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I have to reboot my Samsung Galaxy S phone all the time by yanking the battery. It lock up so hard it will not respond to the power switch. This is an odd phenomena that depends on where I am. Normally no problem but at remote locations the 3G connection is very poor and the thing crashes many time...

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Their file system isn't stored on an SD Card, are slimmed down, as well as locked down it gets more complicated than that but those are some of the basics. The Pi is operating much more like a PC than a smart phone. Even if they are not stored on SDcard, they are still stored on some form of non-vo...

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Smartphones are shut down. I would like to see somebody who always takes out the battery to turn his device off , without using the power button at all. ghans Me too. Perhaps if someone simply removes the battery abruptly, filesystem corruption might happen on Android phones too. Perhaps it is beca...

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When power is abruptly removed from Raspberry Pi, the filesystem on the SDcard of Raspberry Pi is corrupted. Why doesn't the same thing happens to Android smartphones? After all, they are all based on the Linux kernel and using the same filesystems.

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Can the ethernet MAC address of RPi be changed via software during boot-up?

Thank you for helping.

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Is it possible to configure RPi to use static IP address but still get the DNS address from DHCP server? If yes, then it will be easier to ssh and still get internet access with different internet service providers.

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I am searching for a solution to prevent filesystem corruption when power is removed abruptly from Raspberry Pi. I am thinking of a backup battery supply which is rechargeable. As long as power is plugged in, the batteries are being recharged and also powering the Raspberry. Then, if power is abrupt...

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> GPIO only is quite limited to talk to the outside world. Limited? With P1 an P5 headers on Rev 2 models you have 21 GPIOs to talk to the outside world. You can use them pretty much any way you want, as inputs outputs or as peripherals. Check BCM2835 datasheet http://www.raspberrypi.org/wp-content...

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ukscone wrote: WiringPi does have support for SPI & I2C. look at wiringPiSPI.h & wiringPiI2C.h
https://git.drogon.net/?p=wiringPi;a=tr ... 40;hb=HEAD

Is an external IC chip required to support SPI and I2C?

helpme

Hi, You just need right tools, for programming try either: bcm2835 http://www.airspayce.com/mikem/bcm2835/ or WiringPi http://wiringpi.com/ libraries for access to GPIO with SPI, I2C, UART etc. The only missing basic peripheral on Raspberry Pi is the ADC. Thanks! WiringPi looks good. Unfortunately,...

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Hi experts, I am a complete newbie to Raspberrypi but I do have some experience working with MCUs. It is very easy to write firmware to control hardware ports on MCUs. However, I don't get the same feeling with Raspberrypi. Is this the reason why there are many Youtube videos that show people hookin...

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Dear RaspberryPi experts,

May I ask if xbmc on raspberrypi supports the audio equalizer function? I tried searching for such a function but could not find it. If not, do you think it is possible to implement such a feature?

Search found 124 matches

Calibration of temperature sensor

Re: Recommended compiler/IDE for bare metal programming

Re: Recommended compiler/IDE for bare metal programming

Re: Running on write-protected SDcard

Recommended compiler/IDE for bare metal programming

Are apps developed on Raspbian subjected to GPL?

Re: Running on write-protected SDcard

Re: Why does RPi need to pass FCC and CE?

Why does RPi need to pass FCC and CE?

BCM2835 datasheet

Running on write-protected SDcard

Python libraries for hardware ports like i2c, spi

Re: Why smartphones' filesystem do not corrupt like RPi?

Re: Why smartphones' filesystem do not corrupt like RPi?

Re: Why smartphones' filesystem do not corrupt like RPi?

Why smartphones' filesystem do not corrupt like RPi?

Is it possible to hard-core MAC address during boot-up?

Use static IP addr but get DNS addr from DHCP server

Using backup battery supply to prevent filesystem corruptio

Re: Controlling RaspBerryPi hardware ports directly like MCU

Re: Controlling RaspBerryPi hardware ports directly like MCU

Re: Controlling RaspBerryPi hardware ports directly like MCU

Controlling RaspBerryPi hardware ports directly like MCU

Can xbmc on raspberrypi support equalizer function?