From mboxrd@z Thu Jan 1 00:00:00 1970 From: "maxime.ripard@free-electrons.com" Date: Thu, 08 Jan 2015 09:33:31 +0000 Subject: Re: SSD1306 OLED driver Message-Id: <20150108093331.GO7853@lukather> MIME-Version: 1 Content-Type: multipart/mixed; boundary="GTjM2GI4zMe3xHZ5" List-Id: References: In-Reply-To: To: linux-fbdev@vger.kernel.org --GTjM2GI4zMe3xHZ5 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jan 06, 2015 at 06:30:01PM +0530, Ssagarr Patil wrote: > > It's probably even easier with SPI. Have you considered reading > > include/spi/spi.h? > > > Thanks for the pointer, I am using spi_write() call and I see /dev/fb0 no= de created. > but when I do echo "1121"> /dev/fb0 nothing comes up on oled any pointers= on this ? You can't use it like that. It's a standard framebuffer, that is represented as an array of pixels, so you need to use a font rendering software if you want to output some text. Maxime --=20 Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com --GTjM2GI4zMe3xHZ5 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJUrk7rAAoJEBx+YmzsjxAg1NYQAL00eUyg4KVf1jhL0hxLS5XC rpxAEOOCXPkTFsVJtzwAhR9znkBo0oZyszhHOJq2gkXE8+aTsahWZ3KDgOrNqeIE C4OFFI8MaJudaP0qyPJ1k+YrSdQpPvg/AznjYs7zc/sfX3SLSITaESVa/26GWih5 yop28cxkRZi6qs4wpG3NfWgt8jyIMcE3OGYD9gzPlusK09n7VNoXd+khoATWRAMW EQ+wgMiPkdIRPNpjfB8dhdxJ7STl+Un4RBoWHZFfSQJ8y8FHK9lfys+zrXjwZMCa zBDJztVu/j8DNY/wYeo6b/Z7zE9BdnYPCLQtKUypjj3/gWF2hhSNZTWaBF7pNV0X pjm96dbf76bMF1F30n6nKEjbk8TQs2I6FDVwOGZtD3qPHe6OxPLK3HiJmgo6cX3y JN3IxAvgArEHW1mCQ7Soa6hJNgO5GytiV1NgaTjz8IBCf5fhu+eiBw8U6HKgQWNB a6o7YRYuQYkgiHTwHaAhH86tzi9jEP2T2z3Ige1ggogdskOHEhOszHzk2KxsU7+9 ubfILmgyICptRHPSdCz8aGgJ2V6nLgWKkgaFWEjENCcv/kuSQCiW7RQhVdhvjtRS XzaHW1ilAnD8G6Ks/9vWWcriBvYOloLAT+9Q220+javlkZ9rUtxX3CVdFOmXQ5xR IX6wgpcQrzBMBNpE2f2N =Fzei -----END PGP SIGNATURE----- --GTjM2GI4zMe3xHZ5--