Re: [beagleboard] SPI : More CS lines
Thank you for your answer Mickae1. But I know how to use SPI with device tree overlay (I use it that way for my first lcd). I was wondering if it could be possible to declare a simple GPIO pin (via DTO for example) as a CS one. It would allow me to work with fbtft driver without having to alter it. Never mind, I am writing a new driver (called by dto) to emulate more CS pins. I will see if it can work at the required speed. Le mardi 2 décembre 2014 16:01:03 UTC+1, Mickae1 a écrit : your answer : http://hipstercircuits.com/enable-spi-with-device-tree-on-beaglebone-black-copy-paste/ Enjoy, Le Tue Dec 02 2014 at 15:58:53, mota...@gmail.com javascript: a écrit : Hi, I have to connect 2 lcd on a BBB via SPI interfaces (I use fbtft driver). I can only use SPI0 because SPI1 pins are used by I2C for cape eeprom. The problem is that SPI0 has only one CS pin. Is it possible to tell the SPI driver to use a GPIO pin as another CS line ? Am I forced to write a full driver to emulate CS with a GPIO pin ? Thanks in advance for your help. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard...@googlegroups.com javascript:. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] SPI : More CS lines
Have a look at the example here http://www.nagavenkat.adurthi.com/ titled SPI communication: BeagleBone Black( as Master) to 4 Arduinos( as Slaves ) http://www.nagavenkat.adurthi.com/?p=479 Hope this will help, Jan On Wednesday, December 3, 2014 7:35:38 PM UTC+11, mota...@gmail.com wrote: Thank you for your answer Mickae1. But I know how to use SPI with device tree overlay (I use it that way for my first lcd). I was wondering if it could be possible to declare a simple GPIO pin (via DTO for example) as a CS one. It would allow me to work with fbtft driver without having to alter it. Never mind, I am writing a new driver (called by dto) to emulate more CS pins. I will see if it can work at the required speed. Le mardi 2 décembre 2014 16:01:03 UTC+1, Mickae1 a écrit : your answer : http://hipstercircuits.com/enable-spi-with-device-tree-on-beaglebone-black-copy-paste/ Enjoy, Le Tue Dec 02 2014 at 15:58:53, mota...@gmail.com a écrit : Hi, I have to connect 2 lcd on a BBB via SPI interfaces (I use fbtft driver). I can only use SPI0 because SPI1 pins are used by I2C for cape eeprom. The problem is that SPI0 has only one CS pin. Is it possible to tell the SPI driver to use a GPIO pin as another CS line ? Am I forced to write a full driver to emulate CS with a GPIO pin ? Thanks in advance for your help. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] SPI : More CS lines
Thank you very much, exactly what I was looking for ;-) Le jeudi 4 décembre 2014 03:58:11 UTC+1, janszyma...@gmail.com a écrit : Have a look at the example here http://www.nagavenkat.adurthi.com/ titled SPI communication: BeagleBone Black( as Master) to 4 Arduinos( as Slaves ) http://www.nagavenkat.adurthi.com/?p=479 Hope this will help, Jan On Wednesday, December 3, 2014 7:35:38 PM UTC+11, mota...@gmail.com wrote: Thank you for your answer Mickae1. But I know how to use SPI with device tree overlay (I use it that way for my first lcd). I was wondering if it could be possible to declare a simple GPIO pin (via DTO for example) as a CS one. It would allow me to work with fbtft driver without having to alter it. Never mind, I am writing a new driver (called by dto) to emulate more CS pins. I will see if it can work at the required speed. Le mardi 2 décembre 2014 16:01:03 UTC+1, Mickae1 a écrit : your answer : http://hipstercircuits.com/enable-spi-with-device-tree-on-beaglebone-black-copy-paste/ Enjoy, Le Tue Dec 02 2014 at 15:58:53, mota...@gmail.com a écrit : Hi, I have to connect 2 lcd on a BBB via SPI interfaces (I use fbtft driver). I can only use SPI0 because SPI1 pins are used by I2C for cape eeprom. The problem is that SPI0 has only one CS pin. Is it possible to tell the SPI driver to use a GPIO pin as another CS line ? Am I forced to write a full driver to emulate CS with a GPIO pin ? Thanks in advance for your help. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] SPI : More CS lines
Hi, I have to connect 2 lcd on a BBB via SPI interfaces (I use fbtft driver). I can only use SPI0 because SPI1 pins are used by I2C for cape eeprom. The problem is that SPI0 has only one CS pin. Is it possible to tell the SPI driver to use a GPIO pin as another CS line ? Am I forced to write a full driver to emulate CS with a GPIO pin ? Thanks in advance for your help. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] SPI : More CS lines
your answer : http://hipstercircuits.com/enable-spi-with-device-tree-on-beaglebone-black-copy-paste/ Enjoy, Le Tue Dec 02 2014 at 15:58:53, motar...@gmail.com a écrit : Hi, I have to connect 2 lcd on a BBB via SPI interfaces (I use fbtft driver). I can only use SPI0 because SPI1 pins are used by I2C for cape eeprom. The problem is that SPI0 has only one CS pin. Is it possible to tell the SPI driver to use a GPIO pin as another CS line ? Am I forced to write a full driver to emulate CS with a GPIO pin ? Thanks in advance for your help. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
