I am using the ARM-based microcontroller LPC1769 and the LPCXpresso IDE. I am using an example project for Vcom using USB Device controller in 1769. By default it works at 9600 baud. But I don't understand how to change the baud rate - I want to use it at higher baud rate.
Please define every thing well for better answer, I am providing the computer side answer,
If you are connection with Computer, Its using generic Com port which will be assigned to the device,
now, again if you are using computer, the com port have configuration. go to device manager, and see properties>> Configuration>> there you will see baud rate.
go and change that,
that will do. :)
Edit: Updated with links of support in Driver Side,
I have few link for the same VCP(Virtual Comp Port) Drivers you can use
http://www.ftdichip.com/Drivers/VCP.htm
and Documentation for the same in different different case, please refer documentation first :)
http://www.ftdichip.com/Support/Documents/DataSheets.htm
this is all from my side :)
Related
I'm trying to programm my PIC 16F628A with PICKIT3 in MPlabX, but I get the following error:
***************************************************** Connection Failed.
When I enable the "Power Target Circuit From Tool", I get another error:
The target circuit may require more power than the debug tool can provide. An external power supply might be necessary.
Connection Failed.
So a provided an external power supply of 5V and my PIC 16F628A is draining 10mA, despite nothing is connected, only the PICKIT3 to the MCLR, ICSPDATA and ICSPCLK pins of PIC.
I'm using Ubuntu 16.04, MPlabX IPE V4.05., and
PS: Yes, I know how to read a datasheet.
PS: Circuit and PICKIT3 works properlyt if I connect to PICKIT3 Programmer running on Windows 7.
The first issue can sometimes be resolved by shutting down MPLABX, disconnecting the PicKit from your computer and reconnecting everything. Seems the firmware and/or driver sometimes gets in a weird state and needs a good boot to get going again. I sometimes have to reboot my computer just to program my main board (Major PITA).
The second issue is not necessarily caused by an over current despite the message. I always got this error when my PicKit was plugged into an unpowered USB hub. It seems the lower USB bus voltage confuses the PicKit into thinking that the device is the cause for the voltage drop instead of the host simply not supplying the normal voltage. Try plugging it into a powered USB hub or directly into your computer.
I know this is an old topic but maybe this answer can help somebody else.
I use as well official PICKIT's as clones.
It could indeed be caused by a hardware issue.
E.g. short or already activated load like a bunch of LED's.
Disconnect all loads if possible.
When using an official PICKIT 3, this issue is often solved by setting the voltage your PICKIT should supply to a lower level e.g. 5 => 4.625.
In MPLAB go to the properties of your project.
Select PICKIT on the left.
Select Power from the selection dropdown at the top.
When you have a SURE electronics clone, this might do the trick. (Maybe this is also valid for other clones) The AMS1117 they used is the adjustable one.
They used a 680 and a 470 feedback resistor which gives a voltage of 3.09V ((680/470 +1))*1.25 + 50u * 680). If you swap the 680 Ohm resistor with a 750, the output will be closer to the probably desired 3.3V.
Source where I got the idea: https://jrainimo.com/build/2018/12/picfix/
Location FB resistor
Close MPlab, reconnect Pickkit, restart MPlab worked for me.
If you've just created a new project or created a new file, MPlab sometimes confuses some things.
Is there anyone who has worked on STM32L1 series. I'm working on STM32L1xx series and wanted to write USB driver for it. Is there any example for USB driver for STM32L series or anyone worked on STM32L1xx series? Any help will be appreciated.
Thanks in advance.
You need these works to do:
1.USB client driver on STM32. There are lots of available codes in github or other website;
2.SDcard driver. Normally SDCard has two modes, include SPI mode and SD mode, the operation will be simplified a lot in SPI mode, however, in SD mode the speed will more faster than SPI mode. you can refer to datasheet for more information.
Download STM32CubeMX
Download STM32CubeL1
Start new project for your device, choose peripheral, choose device class for MSC
Setup clock for USB
Export project
Configure SPI for your SDCARD (SDIO is not available) for interface between USB device stack and SDCARD sector read on PC demand.
This are key steps to do, as I don't know what you know so far (looks like nothing) and what you have learn yourself so far (looks like nothing) I'm unable to give you comprehensive answer.
My problem pertains module ESP8266, specifically version ESP-01.
When I have uploaded firmware (nodemcu) to the module then it works all right.
But later, I found out that the module is not responding. Even after so much restarts.
In addition, the led on the module shines/ligths very weakly.
I don't know where is the problem. Maybe with power supplying but I am using usb-to-serial converter which provides 5V as well as 3V. In addition I am using a voltage regulator from 5V to 3.3V because I wanted to be sure.
Thank you very much.
The problem is that most usb-to-serial interfaces can't provide enough current for the ESP8266 which could draw peak currents of about 320mA. You must use an external power supply.
I have successfully talked to the computer from an Arduino via serial USB port and I had the idea that I could make a keyboard or mouse with the arduino. Say I wanted to translate the computer's mouse 1 pixel to the left. What message would I have to send over the serial line in order to achieve this?
Google is a wonderful thing. "use arduino as mouse" returns 1.7 million hits. The third hit on the list takes you to the Arduino Playground for an example using the new Leonardo board.
Note:
The Leonardo differs from all preceding boards in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Leonardo to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port.
Assuming you don't have that board, here is another site for some other specific boards and yet another that is log for a project including hardware and software for older boards.
Hope this helps (and is a better answer to the question).
You would have to reconfigure the USB interface chip to appear as a USB HID endpoint.
Does anyone ever develop some application to control the spi device on OMAP3? I can load the spi driver "mcspi", but I don't know how to use it.
As of at least PSP 3.00.00.04, the mcspi driver is integrated with the Linux spi stack.
Turn on
CONFIG_SPI and CONFIG_SPI_OMAP24XX
in your kernel.
Here's how to use spi devices, in general.
There is also the spidev driver, which presents a char device to userspace, but it's experimental.
Ok So first I need to apologize for my previous shoot from the hip answer.
I too have now started looking into trying to get the McSPI's working and it has been some what painful. TI does not have lot of documentation, and I still haven;t been successful in getting any of the McSPI's to actually work, yet. But I thought I would post a link to the beagle board google discussion on the subject, as it appears they have been successful at getting at least McSPI3 working on the OMAP3530.
http://groups.google.com/group/beagleboard/browse_thread/thread/15d9488c1ec314ef/5ca06c67ff438106?q=mcspi3#5ca06c67ff438106