{"id":679,"date":"2009-04-16T12:26:40","date_gmt":"2009-04-16T10:26:40","guid":{"rendered":"http:\/\/daniel.haxx.se\/blog\/?p=679"},"modified":"2009-04-16T13:03:31","modified_gmt":"2009-04-16T11:03:31","slug":"usb-converter-woes","status":"publish","type":"post","link":"https:\/\/daniel.haxx.se\/blog\/2009\/04\/16\/usb-converter-woes\/","title":{"rendered":"USB converter woes"},"content":{"rendered":"

USB to rs232 converters are just never sold properly advertising what chip’s inside and right now I want to know if this one UART I’m working with perhaps is not playing fine with my existing converter cable.<\/p>\n

I have this XScale PXA270 on a \"toradex-colibri\"<\/a>board, and it has only one full featured RS232 (FFUART) and I’m about to move things over to the lesser featured BTUART.<\/p>\n

A theory is that my current USB converter that is based on a “Prolific PL2303” doesn’t play nicely on the serial port that isn’t a full RS232.<\/p>\n

So I ran off and bought a new cable. I grabbed the only model I found in my local Kjell & Company<\/a> store – it’s quite different looking than my existing but there’s no hint anywhere on the package or inside of it that says what chipset that empowers it.<\/p>\n

A quick drive back home (I’m working from home in this assignment), I plugged it in and I got to see this depressingly familiar dmesg output:<\/p>\n

\n
usbcore: registered new interface driver usbserial\r\nusbserial: USB Serial support registered for generic\r\nusbcore: registered new interface driver usbserial_generic\r\nusbserial: USB Serial Driver core\r\nusbserial: USB Serial support registered for pl2303\r\npl2303 2-2.4:1.0: pl2303 converter detected\r\nusb 2-2.4: pl2303 converter now attached to ttyUSB0\r\nusbcore: registered new interface driver pl2303\r\npl2303: Prolific PL2303 USB to serial adaptor driver<\/pre>\n<\/blockquote>\n
So what now? I hate how (my) computers these days don’t have serial ports while the entire embedded world still very much uses them. I think I’ll go searching in my closet to see if I can find an old crap computer with a serial port to try.<\/p>\n
Another theory is that the port simply is broken hw-wise on the dev board but that’s harder to check for me right now.<\/p>\n
Update: <\/strong>it was (as usual) only my stupidity that prevented this from working. If I switch it over to the correct baudrate the usb converter does fine. But before I found that out, I did find a computer with a serial port and I did see it working on that too…<\/p>\n","protected":false},"excerpt":{"rendered":"
USB to rs232 converters are just never sold properly advertising what chip’s inside and right now I want to know if this one UART I’m working with perhaps is not playing fine with my existing converter cable. I have this XScale PXA270 on a board, and it has only one full featured RS232 (FFUART) and … Continue reading USB converter woes<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,12],"tags":[419,35,242,167],"class_list":["post-679","post","type-post","status-publish","format-standard","hentry","category-development","category-electronics","tag-development","tag-embedded","tag-technology","tag-usb"],"_links":{"self":[{"href":"https:\/\/daniel.haxx.se\/blog\/wp-json\/wp\/v2\/posts\/679","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/daniel.haxx.se\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/daniel.haxx.se\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/daniel.haxx.se\/blog\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/daniel.haxx.se\/blog\/wp-json\/wp\/v2\/comments?post=679"}],"version-history":[{"count":15,"href":"https:\/\/daniel.haxx.se\/blog\/wp-json\/wp\/v2\/posts\/679\/revisions"}],"predecessor-version":[{"id":692,"href":"https:\/\/daniel.haxx.se\/blog\/wp-json\/wp\/v2\/posts\/679\/revisions\/692"}],"wp:attachment":[{"href":"https:\/\/daniel.haxx.se\/blog\/wp-json\/wp\/v2\/media?parent=679"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/daniel.haxx.se\/blog\/wp-json\/wp\/v2\/categories?post=679"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/daniel.haxx.se\/blog\/wp-json\/wp\/v2\/tags?post=679"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}