I have sensor node connected to USB port that sense temperature, humidity and light and send the data to PC.
What piece of code will help me to read that data from the USB port in normal C.
Application of the nodes is built on C using Eclipse.
I looked into the specifications of your board and it seems like it's a FTDI chip. This means it's exactly the same way you read from a serial port.
Here is how you program the serial port in Windows (it hasn't changed in a long time).
Related
Im having issues with my TI LAUNCHXL-F28379D. I have it connected to the laptop I am trying to send data to/from via pins P19 (SCIBRxD) and P18 (SCIBTxD), as well as GND and 5V via J16, using a USB Type B cord to which I sautered pin connectors. I'm sure power is being supplied to the board as when I plug the 5V cable of the USB cable, the RGB lights and 3 other small ones turn on. However, the Computer does not recognize ithe controller at the port - it only recognizes if if it is connected via the board's Mini-USB port. I've also written a C Program which opens the COM port and reads data - but this does not work without my knowledge of the COM port number, usually found in Device Manager. I cannot get any further in my project without the port number and it is very annoying. I will attempt to resauter a new USB cable, but if there are any other possible solutions, or if I'm doing something wrong, please let me know.
Absolutely all feedback is appreciated!
The SCIBRxD and SCIBTxD pins belong to the SCI peripheral in the microcontroller. This peripheral implements a UART port (a.k.a. COM port, a.k.a. TTL serial port). It is not a USB port. Nothing useful will happen if you connect it to a USB port, because it is not compatible with USB in any way.
USB-to-UART adapters (a.k.a. USB-to-serial adapters) do exist. There is one built into the LaunchPad. The UART side of the adapter is connected to the SCIB pins, and the USB side of the adapter is connected to the USB port.
I am working on a project which contains acquisition of ECG data with the ADS1293EVM. MSP430F5529 is part of this board as well. For the communication between analog part of the board and microcontroller, I am using SPI and there is also FET Debugger from TI to program the microcontroller. Now I am printing data using printf to a terminal I/O which is part of the IAR software.
However, I would like to print ECG data to the terminal app in PC or to LabView, not in Terminal I/O in IAR software. The board is connected to the PC by USB so there is UART port in device manager. Is there any possibility?
Yes it is possible. You can push all the data on UART which is used in communication between PCB and PC. Than you can use any serial monitor for getting data displayed.
The only connection between your board and the PC is USB, so you have to implement a virtual USB COM port (CDC). TI's USB stack implements such an interface.
I'm using stm32l151 and I want to use usb peripheral in cdc mode. I used stm32 cubeMx to generate the project. however the function CDC_Transmit_FS() always return USBD_BUSY. can anyone help me?
Here is my code:
while (1)
{
CDC_Transmit_FS(Buffer, 6);
HAL_Delay(2000);
}
I only added the above code to the project created by STM32cubeMX but it didn't work.
STM library is buggy and it stalls when you for example try to send many larger packets of data.
There is a problem with the windows drivers and there are quite long delays between packets. So 12MB is quite difficult to archive - using CubeMx I could only have about 3-4Mb (12MB when packet is sent).
Another problem I had - I needed to send some data to the device bofore I could transmit next packet (max 8kB in my case), otherwise it stalled randomly.
Fortunately, the problem is solved and I can receive data in the PC from the STM32. There was a problem in my terminal software. I used serial port manitor to monitor the received data from the serial port, however this serial monitor software do not open the serial port by itself and if any other software opens the serial port and receives the data, it monitors data receptions. I didn't know that.
Thanks
I am programming a MAX32 Micro controller in MPLAB. I want to use the UART protocol to interact with my terminal (I am developing on a mac). Is this possible? Can someone point me in the right direction to get started?
Read Wikipedia UART Article
Read Reference Manual of your µC, Chapter "...UART..."
Get example Code for this issue from your Reference Manual or Programming Manual or Internet Articles
Program your board
Connect your Board with your PC via Cable (USB, RS232 to USB (virtual RS232) or UART to USB)
Open Terminal Program i.e. TeraTerm
Check your Settings i.e. Baud Rate
Try it
I'm programming a 8051 microcontroller system (in C) connected to a PC via a serial port. I'd like for the µC to write to a file on the PC. Is there a simple general way to do this from the C level?
I'm not aware of a off-the-shelf way to do this, but it's not hard to develop yourself. You will need to:
Define a serial protocol for transmitting the file data. There are existing protocols from the old dialup modem days, but they might be too complex. See: http://en.wikipedia.org/wiki/List_of_file_transfer_protocols
Write your microcontroller code to transmit the file data over the serial port, using your protocol.
Write a program that runs on your PC to receive the data and write it to a file.