On 2/22/21 10:50 AM, Johan Hovold wrote: Well I found I have another Prolific device here that I got from Adafruit (https://www.adafruit.com/product/954) It also has a Prolific 2303 and behaves exactly like the other one. i.e. with the current Linux driver it gives a very high baudrate when set to 110 bd and gives 110bd when the modifications are made to the driver that I found. Is it that we are presuming that what Prolific is telling us is true and only Joe and I are actually measuring the data rate? (i.e. why does the Prolific Windows driver set the values as Joe found ???) Adafruit device: Bus 001 Device 013: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x067b Prolific Technology, Inc. idProduct 0x2303 PL2303 Serial Port bcdDevice 3.00 iManufacturer 1 Prolific Technology Inc. iProduct 2 USB-Serial Controller iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 0x0027 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xa0 (Bus Powered) Remote Wakeup MaxPower 100mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 3 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 0 bInterfaceProtocol 0 iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x000a 1x 10 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 0 -- |\ _,,,---,,_ Michael Katzmann /,`.-'`' -. ;-;;,_ NV3Z / VK2BEA / G4NYV |,4- ) )-,_. ,\ ( `'-' '---''(_/--' `-'\_) MichaelK@xxxxxxxx
