I am new to Beaglebone & not too familiar with Linux.
My application requires data to be acquired from a device on SPI & transmit it on LAN. I am using the preloaded Angstrom OS. I have setup the environment for development by precisely following http://jkuhlm.bplaced.net/hellobone/ With this platform, I am able to develop application for LAN transmission. For SPI interface I have followed http://elinux.org/BeagleBone_Black_Enable_SPIDEV I have to use SPI0. I am able to reach properly upto the step of compiling & running the spidev_test code. Following are my questions 1. Does the preloaded Angstrom has SPI device built in the kernel or should the kernel be rebuilt by including the spidev.c? 2. Will the gcc libraries compile the SPIdev_test code? I am getting ‘undefined error for SPI_TX_QUAD’ and many more which I am finding defined in spi.h which is not in gcc include. Can I simply copy spi.h file into the include directory and compile? 3. With reference to the below segment in the .dts file, sclk is mentioned as input. However, I would like BBB to be master to generate clock for the external device. In such case, should the change the value to 0x10? 4. fragment@0 { 5. target = <&am33xx_pinmux>; 6. __overlay__ { 7. spi0_pins_s0: spi0_pins_s0 { 8. pinctrl-single,pins = < 9. 0x150 0x30 /* spi0_sclk, INPUT_PULLUP | MODE0 */ 10. 0x154 0x30 /* spi0_d0, INPUT_PULLUP | MODE0 */ 11. 0x158 0x10 /* spi0_d1, OUTPUT_PULLUP | MODE0 */ 12. 0x15c 0x10 /* spi0_cs0, OUTPUT_PULLUP | MODE0 */ 13. >; 14. }; 15. }; 16. }; 4. The pin mapping file shows that the SPI pins are mapped to 84,….. How to verify that it has been correctly mapped to the processor pin number. Request help for these trivial questions. Thanks -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
