Questions tagged [bit]
The bit tag has no usage guidance.
0
votes
2answers
46 views
Replace digitalWrite with a selective bitwise operation
I have the following code with digitalWrite I aim to write with bitwise operation only.
No portability concerns here whatsoever. (for atmega328p here)
#define DATAOUT 11//MOSI
byte commandbits = ...
3
votes
2answers
169 views
Testing Conditions on Port Bytes - ignoring certain bits?
Being new to testing byte and bit conditions, I feel like there has to be a better way to test for conditions/values on a byte (read from a port).
For example, I'm reading 8 bits from PORTK. I need ...
1
vote
4answers
900 views
Hex/Byte Reversing and Conversion
I'm working on an RFID system using a MFRC522 with this Library : https://github.com/miguelbalboa/rfid
Here's the code I have right now:
int A=(mfrc522.uid.uidByte[0]);
int B=(mfrc522.uid.uidByte[1]);...
-1
votes
1answer
283 views
transmit a sequence of bit using arduino uno [closed]
How do i code to transmit a sequence of bit using arduino uno?My project is about a transmitter and a receiver.Arduino as the transmitter and an application as the receiver.Light sensor will detect ...
0
votes
2answers
422 views
C++ Adding Two 16 bit binary numbers together
I am trying to add two 16 digit binary numbers together. Each binary number will have been entered by the user and saved as: int binaryOne[16] and int binaryTwo[16]. Originally,
int binaryOne[16] = {...
2
votes
3answers
62 views
Arduino status of bit
Is the a way to check the status of a bit in an arduino Uno?
Like how in Atmel AVR, there is bit_is_clear or bit_is_set
0
votes
1answer
138 views
How does Arduino UNO deal with bit shifting?
Explanatory comment: I'm a beginner. I'm examining the feasibly of bit shifting to the right 6 places to divide up the range of the Arduino ADC (has a range of 0 to 1023) to something much smaller. ...
0
votes
2answers
126 views
Encode & decode boolean values into a single integer?
I'm trying to record the state of some pins over time. To save memory, I'm thinking about encoding the pin states into a single integer, like this:
Pin 1: TRUE
Pin 2: FALSE
Pin 3: FALSE
Pin 4: TRUE
...
0
votes
2answers
135 views
Understanding bitwise operations [duplicate]
I am wondering what the second line of code does:
int16_t GyX;
GyX=Wire.read()<<8|Wire.read();
Also, how can I write the GyX value to EEPROM?
From what I understand, int16_t is a two-bytes ...
0
votes
2answers
72 views
Overflow in bit calculation [closed]
I'm having a double buffer to write data from sensors to SD card. inBuf points to the buffer that are written into (from sensors). The other buffer write data to SD card.
char buffer[2][BUFLEN];
...
