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esp32_Adafruit_BusIO
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fixed? mask calculation for RegisterBits

This commit is contained in:
siddacious 2019-10-11 19:09:25 -07:00
parent a403ba0dab
commit 93a03b19f4
1 changed files with 2 additions and 2 deletions
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4
Adafruit_BusIO_Register.cpp
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@ -229,7 +229,7 @@ Adafruit_BusIO_RegisterBits::Adafruit_BusIO_RegisterBits(Adafruit_BusIO_Register
uint32_t Adafruit_BusIO_RegisterBits::read(void) { uint32_t Adafruit_BusIO_RegisterBits::read(void) {
uint32_t val = _register->read(); uint32_t val = _register->read();
val >>= _shift; val >>= _shift;
return val & ((1 << (_bits+1)) - 1); return val & ((1 << (_bits)) - 1);
} }
@ -241,7 +241,7 @@ void Adafruit_BusIO_RegisterBits::write(uint32_t data) {
uint32_t val = _register->read(); uint32_t val = _register->read();
// mask off the data before writing // mask off the data before writing
uint32_t mask = (1 << (_bits+1)) - 1; uint32_t mask = (1 << (_bits)) - 1;
data &= mask; data &= mask;
mask <<= _shift; mask <<= _shift;