saving notes

vignettes/articles/rpi_spi.Rmd

@@ -43,10 +43,21 @@ MISO	POCI
 MOSI	PICO
 SS	CS
 
+# about IOCTL...
+https://www.kernel.org/doc/html/latest/driver-api/ioctl.html
+
+# about SPI...
 https://manpages.debian.org/testing/spi-tools/index.html
 https://manpages.debian.org/testing/spi-tools/spi-config.1.en.html
 https://manpages.debian.org/testing/spi-tools/spi-pipe.1.en.html
 
+# about SPI api
+https://www.kernel.org/doc/html/v5.7/spi/spidev.html
+
+# spi raspberry pi example
+https://raspberry-projects.com/pi/programming-in-c/spi/using-the-spi-interface
+
+
 https://sigmdel.ca/michel/ha/rpi/dnld/draft_spidev_doc.pdf
 https://github.com/CrosseyeJack/spincl
 http://test2.ipsolutionscorp.com/raspberry-pi-spi-utility/