29. Bit Field Operations-ii

Question.7

A firmware engineer writes this code while configuring a peripheral:

uint32_t reg = read_register(CTRL_ADDR);
uint32_t mask = ((1U << 5) - 1) << 8;
reg &= ~mask;
reg |= ((new_val & 0x1F) << 8);
write_register(CTRL_ADDR, reg);

What bit field operation is this code performing?

Need Help? Refer to the Quick Guide below

Extracting a 5-bit field from bits 8–12 and storing it
Replacing a 5-bit field at bits 8–12 with a new value, preserving all other bits
Toggling bits 8–12 to the complement of new_val
Clearing bits 8–12 and setting them all to 1

Restart quiz!