Module tm4c123x_hal::bb

Code to handle bit-banding.

Bit-banding is where the SoC maps each 8-bit byte to 8 consecutive 32-bit words. Writing a 1 to that word sets the matching bit. Writing a 0 clears the matching bit. It means you can perform atomic bit set/clear; i.e. without a read-modify-write.

Functions

• change_bit^⚠
  Sets/Clears a bit at the given address atomically, using the bit-banding feature.
• read_bit
  Reads a bit at the given address atomically, using the bit-banding feature.
• spin_bit
  Spins while reading a bit at the given address atomically, using the bit- banding feature. We take a const pointer and mutate it, but that’s because the svd2rust crate will only give us const pointers.
• toggle_bit^⚠
  Sets and then Clears a bit at the given address atomically, using the bit- banding feature.