i can see that icestorm support ice40 ultra plus up5k fpga,
but this chip has internal osc, is there any example what i use it ? of course using yosys, icestorm (opensource)
and is there some examples where i can use build in IP,s such as SPI, I2C, PWM ?
Thanks
i can see that icestorm support ice40 ultra plus up5k fpga
No, it does not. There has been some preliminary work, but it is far from generating any up5k bit streams, with or without the internal oscillator. Only the devices listed on http://www.clifford.at/icestorm/ are supported (see table under the "What is the Status of the Project?" heading).
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I'm learning about embedded systems and have an idea about one small project and I want to use Cortex M0+ based MCU STM32G081KBT6. I saw a lot of tutorials with this MCU type, but all of them are based on developer board and with them it is very simple to upload code with USB cable. I want to make my custom PCB for this. So my question is what I have to do so I can upload my code to this microcontroller?
From a datasheet I think I have to use SWDIO (PA13) and SWCLK(PA14) ports for Boot, but if someone can help me do I have to use also some resistors, can I make it USB to wire transfer with this, or I have to use some external device to make it possible? Or there is some easier and better solution to upload code from my laptop to microcontroller?
Thanks for the replies.
There two main options:
SWD
Implement an SWD programming connector. Basically the pins GND, SWDIO, SWCLK and preferably 3.3V are made available. No resisters are needed. You can fit a 4 pin header, an official 10 pin SWD connector or just 4 pads (for connecting using an adapter with pogo pins).
This option requires an SWD debug adapter like ST-Link or J-Link. In addition to uploading firmware, this option supports debugging.
USART
Make the USART (RX, TX) pins plus GND and 3.3V available on the board. This option requires a USB-to-serial adapter.
It's also possible to use I2C or SPI instead, though there are no standard solutions for connecting to your board that I'm aware of.
USB isn't an option for this particular chip. It is supported on many of the more expensive STM32 chips though.
I strongly recommend the first option. It is far more versatile than the other options. And an ST-Link adapter isn't expensive.
Details regarding the bootloader capabilities and pins:
https://www.st.com/resource/en/application_note/cd00167594-stm32-microcontroller-system-memory-boot-mode-stmicroelectronics.pdf
I am learning about ARM development on my STM32F7 Discovery Kit (w/ STM32F746NGH6 Microcontroller) and I'm trying to write a "blinky" program without using high level libraries.
Reading the documentation, I couldn't figure out which MCU pins are all those onboard LED's connected to? What is the right document to check?
Looking at the board I can see some LEDs (LD1, LD2, ...), but how can I reach them in program? I don't see them in header files and if they are controlled via GPIO pins, how to I know which ones?
In the user manual there's no mention of any LED, except in the electrical schematics (where none of the LEDs is connected directly to the MCU afaik- they serve mostly as hard-wired board status indicators).
Is it possible that an advanced board like this doesn't have a single general purpose LED on it?
From the schematic in that document, it looks like you should be able to use LED LD1 on PI1 (GPIO port I pin 1).
Download the STM32CubeF7 software package. It should include a blinky program example specifically for your board. Then see which LED/pin they use in the example program.
I am a newbie in this subject and want to learn how to embed codes into MSP430.
I have a breakout board MSP430-H5438 and I am not using JTAG interface.
I have the IAR generated codes (hex files) ready (ADC, SPI interfaces), however I could not load them into the IC.
I am using a USB-UART bridge to connect device to PC, BSL scripter for software, but there is no result.
Is it a wrong way to connect MSP430 to PC without JTAG interface? Am I running in circles here?
Thanks in advance.
BSL should work but you need to connect not only the TX and RX but also you need to have DTR connected to RST and RTS to TEST. If your USB-UART interface only has TX and RX (which is often the case) then it will not work with BSL.
Note that the MCU on that board supports not only the regular (and expensive) JTAG but also the newer SBW interface. This means you can get the $4.30 Launcphad and program your board using the programmer that is included on the Launchpad. This will let you do anything you can do over the regular JTAG and is highly recommended over BSL since it will give you hardware debugging functionality. And the Launchpad can be useful on its own too.
I'm looking to control a mains powered light from a simple relay switch connected via USB to the computer.
The relay switch isn't even a USB device, it's just a simple switch that requires the USB voltage to turn it on. When the voltage drops below a threshold, the switch will turn the light off.
My problem is that I can't control the power output of a USB port. I'm happy to do it using any language on Windows or Linux (but preferably Java because I'm used to it).
Unfortunately, in most cases you cannot control the power supply to the USB port. The power supply is usually hardwired through, and not switchable in software. You can send a reset to a USB device, but that won't work in your case.
There are a number of projects on instructables that do similar to what you describe, but unfortunately they seem to either be quite complicated or require expensive parts.
EDIT: There is actually a product currently in the news which would do want you want, but it doesn't appear to be shipping yet: http://www.pwrusb.com/
EDIT (again): Apparently you can do this with some usb hubs. This post sugggests the Linksys USB2HUB4 is one that works.
EDIT (and again): Apparently there are a number of similar questions, but there don't seem to be any more useful answers:
https://stackoverflow.com/questions/405269/custom-usb-device-that-disables-power-to-usb-devices-plugged-into-it
Power off an USB device in software on Windows
Is there software or code to alter USB power output
Can I write a program that swiches USB on/off
Most of the USB to Serial or USB to RS232 $10 converters support hardware handshaking. Use one of those as a single channel digital io.
Connect your transistor that will drive the relay to DTR on the converter board and command DTR ON/OFF with the converters driver.
A 2N7002 is a good transistor to use (FET actually) since it will work from 3V and doesnt need any resistors anywhere.
Here is a complete solution.
It uses an Arduino board, with a USB connection, (and Uno for example) to control the relay and combines this with pfod (Protocol for Operation Discovery) www.pfod.com.au which will let you control the board/relay from either the Arduino IDE SerialMonitor, or a terminal window (TeraTerm) or a Java program. The message protocol encloses commands in { }, think simplified html for micros, and provides numerous screens, menus, sliders, text and numeric inputs, etc. A detailed protocol spec is available
See Garage Door Remote for a detailed example, with full Arduino code and an example of controlling the relay from TeraTerm as well as the Arduino IDE SerialMonitor.
There is also an Android app, pfodApp, which will do general purpose control via bluetooth, or wifi/internet with 128 bit security. The pfodApp does all the Android stuff, you only need to code some simple strings in your Arduino code to get any menu system you want. See www.pfod.com.au for numerous examples.
You need a USB-GPIO microcontroller:
Adafruit FT232H (about $15)
Arduino Nano ATmega328 (about $7)
See this answer
I would suggest placing a separate Raspberry Pi unit with a wake-on-lan feature activated so you can ping it off and on.
You could do it by combining these two products from Pololu, for about $25:
Micro Maestro (assembled)
Basic SPDT Relay Carrier with 5VDC Relay (Assembled)
The Maestro is mainly a servo controller but you can set any of its channels to be simple digital outputs instead. The output can be controlled from the Maestro Control Center software or you can write your own software. A digital output from a Maestro is suitable to turn on the relay on the relay carrier. The relay could be powered from USB through the Maestro; I think it draws about 100 mA of current so that probably will not be a problem for most USB ports, though it would not be USB-compliant because the total current drawn by the Maestro and the relay would be over 100 mA. You could supply your own power source for the relay if you are worried about that.
I had a look at this and this but no one sounded particularly sure of their ideas and I'm kind of after a different thing anyway. I want to hook my usb power cables (red and black) up to my phone so I don't have to use a battery (the battery is dead anyway and this is just an experiment). The problem is that USB standards ensure that a minimum of 4.35V is supplied, when I only want 3.7V. Does anyone know for sure that you can or cannot regulate power output programmatically? Some other queries I have are: What kind of power does the sleep mode provide? And what would I need to code something in to play with this, C++?
No, you won't find a computer that allows you to set this voltage in software. It would break the USB specification.
You can get 150mA by default, and 500mA if your USB device negotiates it with the computer (requiring a little bit of logic in the device). Multiply by 5V to get the provided power.
A bit more info on the answer from Pascal:
The normal operation (Non-Configured mode) is 100mA
In theory, the operating system should check the MaxPower value of the device's configuration descriptor to decide if to allow it to draw more than 100mA.
In practice, PCs do not do it (and have no way to control it). So you can try taking 500mA.
(Of course connecting a bus powered hub and linking more then one 500mA device, should, not work.)
If the device is not actively used, the OS may (and should) suspend it. When suspended the power is limited to 1-0.5mA (Again, in theory, since it can not be controlled by software).