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What is the purpose of bit banging?
Bit banging allows a device to implement different protocols with minimal or no hardware changes. In some cases, bit banging is made feasible by newer, faster processors because more recent hardware operates much more quickly than hardware did when standard communications protocols were created.
What is bit binding in I2C?
The I2C bit banging is a technique for serial communi- cations using software instead of a dedicated hardware module. This means that the code controls the state of the MCU pins, related to all parameters of the signals: timing, levels and synchronization. Source code for common data transfer modes is also provided.
Can synchronous or asynchronous?
Synchronous = happens at the same time. Asynchronous = doesn’t happen at the same time. With synchronous learning, participants can receive immediate feedback. With asynchronous learning, the participants can learn at their own pace.
What are the bits in the bit band?
Bit_word_offset is the position of the target bit in the bit-band memory region. the targeted bit. Bit_band_base is the starting address of the alias region. Byte_offset is the number of the byte in the bit-band region that contains the targeted bit. Bit_number is the bit position (0-7) of the targeted bit.
What are the advantages of bit banding in C?
Advantages of Bit-Banding (Applications) Changing the value of register’s bits using atomic operation (the READ-MODIFY-WRITE operation cannot be interrupted by other activities). Make flags variables instead of packed bit fields in C (which is not advised for a portable code).
Why is bit banding not an atomic operation?
It is not an atomic operation, which could lead to faults in some critical code sections. Especially for shared bit-field variables between interrupts and processes. In a nutshell, using bit-field variables is more efficient for SRAM but less for flash and the speed of the code execution.
How to map each bit in bit band region?
To map each bit in bit-band region you need 1 word in the alias region. Apparently, the size of bit-band alias will be 32-MB. As a condensed explanation, to set the value of a bit from bit-band region you need to change the value of the LSB in the alias address.