From 9579e9487c2039df38cc4fd0ac2846ef07cc0947 Mon Sep 17 00:00:00 2001 From: Marti Bolivar Date: Fri, 11 Mar 2011 20:43:59 -0500 Subject: shiftOut(), docs fixes --- wirish/io.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'wirish/io.h') diff --git a/wirish/io.h b/wirish/io.h index d2e4d2d..8dad1d1 100644 --- a/wirish/io.h +++ b/wirish/io.h @@ -216,5 +216,21 @@ uint8 isButtonPressed(); */ uint8 waitForButtonPress(uint32 timeout_millis); +/** + * Shift out a byte of data, one bit at a time. + * + * This function starts at either the most significant or least + * significant bit in a byte value, and shifts out each byte in order + * onto a data pin. After each bit is written to the data pin, a + * separate clock pin is pulsed to indicate that the new bit is + * available. + * + * @param dataPin Pin to shift data out on + * @param clockPin Pin to pulse after each bit is shifted out + * @param bitOrder Either MSBFIRST (big-endian) or LSBFIRST (little-endian). + * @param val Value to shift out + */ +void shiftOut(uint8 dataPin, uint8 clockPin, uint8 bitOrder, uint8 value); + #endif -- cgit v1.2.3