Trouble understanding physical pin numbers vs pin names
hello,
i'm new , can't find explanation understanding relationship between physical pin numbers , actual pin names.
for example, i'm looking @ leonardo schematic, physical pin 32 shows pin modes "(icp3/clk0/oc4a)pc7" given pin name of "io13*". can't life of me figure out why calling pin "io13*" makes sense , correlation made. confuses me see pinmode(13,output); that's referring io13* not actual 13th pin.
furthermore, lets want use physical pin 9, named "sclk" in leonardo schematic, digital output. i'm not sure how relate pin 9 being digital io can pass function pinmode();
thank help!
here's link leonardo schematic reference.
http://arduino.cc/en/uploads/main/arduino-leonardo-schematic_3b.pdf
i'm new , can't find explanation understanding relationship between physical pin numbers , actual pin names.
for example, i'm looking @ leonardo schematic, physical pin 32 shows pin modes "(icp3/clk0/oc4a)pc7" given pin name of "io13*". can't life of me figure out why calling pin "io13*" makes sense , correlation made. confuses me see pinmode(13,output); that's referring io13* not actual 13th pin.
furthermore, lets want use physical pin 9, named "sclk" in leonardo schematic, digital output. i'm not sure how relate pin 9 being digital io can pass function pinmode();
thank help!
here's link leonardo schematic reference.
http://arduino.cc/en/uploads/main/arduino-leonardo-schematic_3b.pdf
look @ pins_arduino.h mapping port software name.
there 3 arrays define stuff - first list order of ports, 2nd lists bits within port.
then there datasheet maps port/bit physical pin.
there several guides/pictures show mapping, chart linked on products/leonardo page
http://arduino.cc/en/hacking/pinmapping32u4
there 3 arrays define stuff - first list order of ports, 2nd lists bits within port.
then there datasheet maps port/bit physical pin.
there several guides/pictures show mapping, chart linked on products/leonardo page
http://arduino.cc/en/hacking/pinmapping32u4
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