Playing with Arduino
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cbi()

Abstract

The cbi() is a macro to set the bit(the second argument) of the address(the first argument) to 0.

Source Code

The cbi() is defined in hardware/arduino/avr/cores/arduino/wiring_private.h as below.

1
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))

It sets the bit-th bit of the content of sfr to 0.

The _SFR_BYTE() is a macro that returns a byte of data of the specified address. The _BV() is a macro that shifts 1 to left by the specified numnber.

バージョン

Arduino 1.8.13

Last Update

June 19, 2020

inserted by FC2 system