| ??? 07/30/09 08:20 Read: times Msg Score: +1 +1 Good Question |
#168022 - Two different questions? Responding to: ???'s previous message |
Andy Neil said:
Yes, it's easy to get a USB-to-Serial converter that allows a UART interface to be connected to a USB Host.
But, just as PCs are rapidly losing their serial ports, now devices are also rapidly losing their serial ports - and coming with only a USB connection. So, what if I want to connect one of those devices to a microcontroller? Andy Neil said:
Plenty of ARM7 & Cortex controllers now have USB Host ports, but they go on about hosting mass-storage or HID devices - I can't find anything that shows how to connect a "UART" class device. Are these two different questions? The first seems to be "How do I connect a peripheral which has only a USB port to a microcontroller which only has an UART?", while the second is "How do I talk to USB device other than mass-storage or HID with a microcontroller that does have USB host functionality?". The answer to the former probably involves having another system (uC, ASIC, FPGA) with USB host functionality between the two devices. The answer to the second can probably be found by digging for the appropriate communications protocol. Maybe there's something on the other device classes on www.usb.org? |
| Topic | Author | Date |
| USB-to-Serial, but "backwards" | 01/01/70 00:00 | |
| USBWiz | 01/01/70 00:00 | |
| Good one - thanks! | 01/01/70 00:00 | |
| Similar to the FTDI thing | 01/01/70 00:00 | |
| Vinculum CDC | 01/01/70 00:00 | |
| Two different questions? | 01/01/70 00:00 | |
| A question and an approach? | 01/01/70 00:00 | |
| So you are looking for a CDC device driver? | 01/01/70 00:00 | |
| Basically, yes! | 01/01/70 00:00 | |
| .Net? | 01/01/70 00:00 | |
| Microsoft's .NET Micro Framework | 01/01/70 00:00 | |
| Micro$oft | 01/01/70 00:00 | |
| So Bill sells us an OS for LPC's | 01/01/70 00:00 | |
| Miniscule requirements | 01/01/70 00:00 | |
| as miniscule memory as 64kB RAM. | 01/01/70 00:00 | |
| Also >= 256kB flash | 01/01/70 00:00 | |
| "They" ? | 01/01/70 00:00 | |
Yes, they=Microsoft | 01/01/70 00:00 | |
| Atmel AT90USBKey (AVR) | 01/01/70 00:00 |