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Code Issues Projects Releases Packages Wiki Activity Actions 9

Clean-up reverse_bits helpers (#3011)

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Oxan van Leeuwen 2022-01-06 12:54:58 +01:00 committed by GitHub
parent 5e1e543b06
commit a4931f5d78
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 20 additions and 22 deletions
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4
esphome/components/remote_base/midea_protocol.cpp
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@ -9,8 +9,8 @@ static const char *const TAG = "remote.midea";
uint8_t MideaData::calc_cs_() const {
uint8_t cs = 0;
for (const uint8_t *it = this->data(); it != this->data() + OFFSET_CS; ++it)
cs -= reverse_bits_8(*it);
return reverse_bits_8(cs);
cs -= reverse_bits(*it);
return reverse_bits(cs);
}
bool MideaData::check_compliment(const MideaData &rhs) const {

2
esphome/components/ttp229_lsf/ttp229_lsf.cpp
View file

@ -35,7 +35,7 @@ void TTP229LSFComponent::loop() {
}
touched = i2c::i2ctohs(touched);
this->status_clear_warning();
touched = reverse_bits_16(touched);
touched = reverse_bits(touched);
for (auto *channel : this->channels_) {
channel->process(touched);
}

15
esphome/core/helpers.cpp
View file

@ -187,17 +187,6 @@ void delay_microseconds_safe(uint32_t us) { // avoids CPU locks that could trig
;
}
uint8_t reverse_bits_8(uint8_t x) {
x = ((x & 0xAA) >> 1) | ((x & 0x55) << 1);
x = ((x & 0xCC) >> 2) | ((x & 0x33) << 2);
x = ((x & 0xF0) >> 4) | ((x & 0x0F) << 4);
return x;
}
uint16_t reverse_bits_16(uint16_t x) {
return uint16_t(reverse_bits_8(x & 0xFF) << 8) | uint16_t(reverse_bits_8(x >> 8));
}
uint32_t fnv1_hash(const std::string &str) {
uint32_t hash = 2166136261UL;
for (char c : str) {
@ -210,10 +199,6 @@ bool str_equals_case_insensitive(const std::string &a, const std::string &b) {
return strcasecmp(a.c_str(), b.c_str()) == 0;
}
template<uint32_t> uint32_t reverse_bits(uint32_t x) {
return uint32_t(reverse_bits_16(x & 0xFFFF) << 16) | uint32_t(reverse_bits_16(x >> 16));
}
static int high_freq_num_requests = 0; // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
void HighFrequencyLoopRequester::start() {

21
esphome/core/helpers.h
View file

@ -120,10 +120,6 @@ std::string uint64_to_string(uint64_t num);
/// Convert a uint32_t to a hex string
std::string uint32_to_string(uint32_t num);
uint8_t reverse_bits_8(uint8_t x);
uint16_t reverse_bits_16(uint16_t x);
uint32_t reverse_bits_32(uint32_t x);
/// Convert RGB floats (0-1) to hue (0-360) & saturation/value percentage (0-1)
void rgb_to_hsv(float red, float green, float blue, int &hue, float &saturation, float &value);
/// Convert hue (0-360) & saturation/value percentage (0-1) to RGB floats (0-1)
@ -343,6 +339,23 @@ inline std::array<uint8_t, sizeof(T)> decode_value(T val) {
return ret;
}
/// Reverse the order of 8 bits.
inline uint8_t reverse_bits(uint8_t x) {
x = ((x & 0xAA) >> 1) | ((x & 0x55) << 1);
x = ((x & 0xCC) >> 2) | ((x & 0x33) << 2);
x = ((x & 0xF0) >> 4) | ((x & 0x0F) << 4);
return x;
}
/// Reverse the order of 16 bits.
inline uint16_t reverse_bits(uint16_t x) {
return (reverse_bits(static_cast<uint8_t>(x & 0xFF)) << 8) | reverse_bits(static_cast<uint8_t>((x >> 8) & 0xFF));
}
/// Reverse the order of 32 bits.
inline uint32_t reverse_bits(uint32_t x) {
return (reverse_bits(static_cast<uint16_t>(x & 0xFFFF)) << 16) |
reverse_bits(static_cast<uint16_t>((x >> 16) & 0xFFFF));
}
/// Convert a value between host byte order and big endian (most significant byte first) order.
template<typename T, enable_if_t<std::is_unsigned<T>::value, int> = 0> constexpr T convert_big_endian(T val) {
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__