In early 2012 I was trying to transfer data between my Micro controllers and PC as fast as Possible.I was thinking to build a device using a low power MCU that can perform like team viewer.The parts I had chosen were STM32F4 to run the application,NRF24L01 to handle the wireless part & USB to communicate with PC .Note that USB is not a part no its a bus.
Mistake No 1
So first I thought I should try MCP2210 from Microchip.
Reasons behind Choosing MCP2210
its a full speed device .
Its quite cheaper .
you don’t need a MCU to send data to NRF.
You can download the library and PCB files below.
However, until now I haven’t mentioned why its a mistake .It’s a mistake because MCP2210 is a HID device . even though it’s a full speed device it doesn’t support any other endpoint other than Interrupt Endpoint .In page no 62 ,Chapter 3 of a book called USB complete you can find that maximum data rate possible for this endpoint is is 64Kbytes/Sec . since NRF24L01 supports up to 2mbps i’e 250KBps, MCP2210 would act as a bottleneck.
In my next post I will tell why I switched to FT232 .That was not enough then I switched to STM32F103 & that was the best choice.