From mboxrd@z Thu Jan 1 00:00:00 1970 To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> In-reply-to: Your message of "Thu, 08 May 2014 18:58:31 BST." <275c3465707d98d4c1f88f81b40670fd@quintile.net> References: <275c3465707d98d4c1f88f81b40670fd@quintile.net> Date: Thu, 8 May 2014 11:36:22 -0700 From: Bakul Shah Message-Id: <20140508183622.E368BB827@mail.bitblocks.com> Subject: Re: [9fans] radio Topicbox-Message-UUID: e4460788-ead8-11e9-9d60-3106f5b1d025 On Thu, 08 May 2014 18:58:31 BST "Steve Simon" wrote: > I have a hifiberry (http://www.hifiberry.com/) nicely minimalist, > though no driver at present - I will await the GSOC project :-) > I have some itron VFDs from work, 256 x 64 pixel. I like these as > the visibility is excellent. The only annoyance is they have > a parallel interface and I use up all the PI's GPIOs. > I also need to interface a rotary encoder for the tuning knob which > is also a pain - not complex enough to justify an FPGA, but a bit too > much to poll when the PI is doing audio decode as well. No need for polling. The BCM2835 can handle edge triggered interrupts. Or you can use a PAL or CPLD. > Thinking of adding a PIC or an AVR just for the encoder / VFD interface > and talking i2c to it.