[SOLVED] Serial communication through USB.

[Pavithra89]

Hi all
I need to establish a serial communication protocol to 8051 using USB. I have been successful in using rs232. Ive been searching on ingoogle to get some information but in vain..
Please let me know all possible ways to get this done. Suggest me any books regarding this. Any suggestions are welcome.
Regards

 

[daniel_edb]

Solutions are (USB to rs232 converters chips): FT232R, PL2303, CH341,...

 

[14dhrumit]

I hope this might be useful

https://www.edaboard.com/threads/181187/

 

[Pavithra89]

Hi Other than converters? Is there any way?
Regards

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Thanks for providing me link. It was very useful
Regards

 

[jayanth.devarayanadurga]

No. You have to use USB to Serial adapters only. It is designed for that purpose only.

 

[FvM]

Or use a 8051 variant with built-in USB interface, available e.g. from Atmel.

 

[spudboy488]

Look into the MCP2200 USB to UART IC from Microchip. This chip and a 12 MHz resonator will convert USB to serial which should interface directly to the UART in your 8051. It also has up to 8 GPIO lines which I use for various functions in my designs (with RS232, I only had RTS and DTR to work with). I have just started using these with PICs and it requires no software changes on the PIC side. For about $5 in parts (chip, resonator, and connector), you get a USB to serial conversion that would allow all you legacy serial code to run unchanged.

 

[Pavithra89]

Thank u

No. You have to use USB to Serial adapters only. It is designed for that purpose only.

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Ok
Il start looking at google as to which variant to use..
Regards n thank u

Or use a 8051 variant with built-in USB interface, available e.g. from Atmel.

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Thanks alot Il take all your suggestion
Regards

Look into the MCP2200 USB to UART IC from Microchip. This chip and a 12 MHz resonator will convert USB to serial which should interface directly to the UART in your 8051. It also has up to 8 GPIO lines which I use for various functions in my designs (with RS232, I only had RTS and DTR to work with). I have just started using these with PICs and it requires no software changes on the PIC side. For about $5 in parts (chip, resonator, and connector), you get a USB to serial conversion that would allow all you legacy serial code to run unchanged.

 

[jayanth.devarayanadurga]

You can use USB to TTL if you want to Communicate between PC and MCU.

https://www.google.co.in/imgres?img...G8zHrQftnIHwBg&sqi=2&ved=0CEQQ9QEwAw&dur=7083

https://probots.co.in/index.php?main_page=product_info&cPath=67_88&products_id=411

 

[josiphal]

Few years ago, I was using PL2303HXD as USB/UART bridge to DS89C450. On PC side it is CDC / virtual serial port, so standard Win32 API functions (ReadFile/WriteFile) can be used for communication. With DS89C450 on 32 MHz (8 MHz Quartz) it was able to transfer data at 2000000 bps, and overclocked to 40 MHz (10 Mhz Quartz) at 2500000 bps.

 

[jayanth.devarayanadurga]

Yes. You are right. It is a good product. I purchased it from www.miniinthebox.com :grin: