mirror of https://github.com/arendst/Tasmota.git
259 lines
8.3 KiB
C++
259 lines
8.3 KiB
C++
|
#include <Adafruit_BusIO_Register.h>
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Create a register we access over an I2C Device (which defines the bus and address)
|
||
|
|
* @param i2cdevice The I2CDevice to use for underlying I2C access
|
||
|
|
* @param reg_addr The address pointer value for the I2C/SMBus register, can be 8 or 16 bits
|
||
|
|
* @param width The width of the register data itself, defaults to 1 byte
|
||
|
|
* @param bitorder The bit order of the register (used when width is > 1), defaults to LSBFIRST
|
||
|
|
* @param address_width The width of the register address itself, defaults to 1 byte
|
||
|
|
*/
|
||
|
|
Adafruit_BusIO_Register::Adafruit_BusIO_Register(Adafruit_I2CDevice *i2cdevice, uint16_t reg_addr,
|
||
|
|
uint8_t width, uint8_t bitorder, uint8_t address_width) {
|
||
|
|
_i2cdevice = i2cdevice;
|
||
|
|
_spidevice = NULL;
|
||
|
|
_addrwidth = address_width;
|
||
|
|
_address = reg_addr;
|
||
|
|
_bitorder = bitorder;
|
||
|
|
_width = width;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Create a register we access over an SPI Device (which defines the bus and CS pin)
|
||
|
|
* @param spidevice The SPIDevice to use for underlying I2C access
|
||
|
|
* @param reg_addr The address pointer value for the I2C/SMBus register, can be 8 or 16 bits
|
||
|
|
* @param type The method we use to read/write data to SPI (which is not as well defined as I2C)
|
||
|
|
* @param width The width of the register data itself, defaults to 1 byte
|
||
|
|
* @param bitorder The bit order of the register (used when width is > 1), defaults to LSBFIRST
|
||
|
|
* @param address_width The width of the register address itself, defaults to 1 byte
|
||
|
|
*/
|
||
|
|
Adafruit_BusIO_Register::Adafruit_BusIO_Register(Adafruit_SPIDevice *spidevice, uint16_t reg_addr,
|
||
|
|
Adafruit_BusIO_SPIRegType type,
|
||
|
|
uint8_t width, uint8_t bitorder, uint8_t address_width) {
|
||
|
|
_spidevice = spidevice;
|
||
|
|
_spiregtype = type;
|
||
|
|
_i2cdevice = NULL;
|
||
|
|
_addrwidth = address_width;
|
||
|
|
_address = reg_addr;
|
||
|
|
_bitorder = bitorder;
|
||
|
|
_width = width;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Create a register we access over an I2C or SPI Device. This is a handy function because we
|
||
|
|
* can pass in NULL for the unused interface, allowing libraries to mass-define all the registers
|
||
|
|
* @param i2cdevice The I2CDevice to use for underlying I2C access, if NULL we use SPI
|
||
|
|
* @param spidevice The SPIDevice to use for underlying I2C access, if NULL we use I2C
|
||
|
|
* @param reg_addr The address pointer value for the I2C/SMBus register, can be 8 or 16 bits
|
||
|
|
* @param type The method we use to read/write data to SPI (which is not as well defined as I2C)
|
||
|
|
* @param width The width of the register data itself, defaults to 1 byte
|
||
|
|
* @param bitorder The bit order of the register (used when width is > 1), defaults to LSBFIRST
|
||
|
|
* @param address_width The width of the register address itself, defaults to 1 byte
|
||
|
|
*/
|
||
|
|
Adafruit_BusIO_Register::Adafruit_BusIO_Register(Adafruit_I2CDevice *i2cdevice, Adafruit_SPIDevice *spidevice,
|
||
|
|
Adafruit_BusIO_SPIRegType type, uint16_t reg_addr,
|
||
|
|
uint8_t width, uint8_t bitorder, uint8_t address_width) {
|
||
|
|
_spidevice = spidevice;
|
||
|
|
_i2cdevice = i2cdevice;
|
||
|
|
_spiregtype = type;
|
||
|
|
_addrwidth = address_width;
|
||
|
|
_address = reg_addr;
|
||
|
|
_bitorder = bitorder;
|
||
|
|
_width = width;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Write a buffer of data to the register location
|
||
|
|
* @param buffer Pointer to data to write
|
||
|
|
* @param len Number of bytes to write
|
||
|
|
* @return True on successful write (only really useful for I2C as SPI is uncheckable)
|
||
|
|
*/
|
||
|
|
bool Adafruit_BusIO_Register::write(uint8_t *buffer, uint8_t len) {
|
||
|
|
|
||
|
|
uint8_t addrbuffer[2] = {(uint8_t)(_address & 0xFF), (uint8_t)(_address>>8)};
|
||
|
|
|
||
|
|
if (_i2cdevice) {
|
||
|
|
return _i2cdevice->write(buffer, len, true, addrbuffer, _addrwidth);
|
||
|
|
}
|
||
|
|
if (_spidevice) {
|
||
|
|
if (_spiregtype == ADDRBIT8_HIGH_TOREAD) {
|
||
|
|
addrbuffer[0] &= ~0x80;
|
||
|
|
}
|
||
|
|
return _spidevice->write( buffer, len, addrbuffer, _addrwidth);
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Write up to 4 bytes of data to the register location
|
||
|
|
* @param value Data to write
|
||
|
|
* @param numbytes How many bytes from 'value' to write
|
||
|
|
* @return True on successful write (only really useful for I2C as SPI is uncheckable)
|
||
|
|
*/
|
||
|
|
bool Adafruit_BusIO_Register::write(uint32_t value, uint8_t numbytes) {
|
||
|
|
if (numbytes == 0) {
|
||
|
|
numbytes = _width;
|
||
|
|
}
|
||
|
|
if (numbytes > 4) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (int i=0; i<numbytes; i++) {
|
||
|
|
if (_bitorder == LSBFIRST) {
|
||
|
|
_buffer[i] = value & 0xFF;
|
||
|
|
} else {
|
||
|
|
_buffer[numbytes-i-1] = value & 0xFF;
|
||
|
|
}
|
||
|
|
value >>= 8;
|
||
|
|
}
|
||
|
|
return write(_buffer, numbytes);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Read data from the register location. This does not do any error checking!
|
||
|
|
* @return Returns 0xFFFFFFFF on failure, value otherwise
|
||
|
|
*/
|
||
|
|
uint32_t Adafruit_BusIO_Register::read(void) {
|
||
|
|
if (! read(_buffer, _width)) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint32_t value = 0;
|
||
|
|
|
||
|
|
for (int i=0; i < _width; i++) {
|
||
|
|
value <<= 8;
|
||
|
|
if (_bitorder == LSBFIRST) {
|
||
|
|
value |= _buffer[_width-i-1];
|
||
|
|
} else {
|
||
|
|
value |= _buffer[i];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Read a buffer of data from the register location
|
||
|
|
* @param buffer Pointer to data to read into
|
||
|
|
* @param len Number of bytes to read
|
||
|
|
* @return True on successful write (only really useful for I2C as SPI is uncheckable)
|
||
|
|
*/
|
||
|
|
bool Adafruit_BusIO_Register::read(uint8_t *buffer, uint8_t len) {
|
||
|
|
uint8_t addrbuffer[2] = {(uint8_t)(_address & 0xFF), (uint8_t)(_address>>8)};
|
||
|
|
|
||
|
|
if (_i2cdevice) {
|
||
|
|
return _i2cdevice->write_then_read(addrbuffer, _addrwidth, buffer, len);
|
||
|
|
}
|
||
|
|
if (_spidevice) {
|
||
|
|
if (_spiregtype == ADDRBIT8_HIGH_TOREAD) {
|
||
|
|
addrbuffer[0] |= 0x80;
|
||
|
|
}
|
||
|
|
return _spidevice->write_then_read(addrbuffer, _addrwidth, buffer, len);
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Read 2 bytes of data from the register location
|
||
|
|
* @param value Pointer to uint16_t variable to read into
|
||
|
|
* @return True on successful write (only really useful for I2C as SPI is uncheckable)
|
||
|
|
*/
|
||
|
|
bool Adafruit_BusIO_Register::read(uint16_t *value) {
|
||
|
|
if (! read(_buffer, 2)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (_bitorder == LSBFIRST) {
|
||
|
|
*value = _buffer[1];
|
||
|
|
*value <<= 8;
|
||
|
|
*value |= _buffer[0];
|
||
|
|
} else {
|
||
|
|
*value = _buffer[0];
|
||
|
|
*value <<= 8;
|
||
|
|
*value |= _buffer[1];
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Read 1 byte of data from the register location
|
||
|
|
* @param value Pointer to uint8_t variable to read into
|
||
|
|
* @return True on successful write (only really useful for I2C as SPI is uncheckable)
|
||
|
|
*/
|
||
|
|
bool Adafruit_BusIO_Register::read(uint8_t *value) {
|
||
|
|
if (! read(_buffer, 1)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
*value = _buffer[0];
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Pretty printer for this register
|
||
|
|
* @param s The Stream to print to, defaults to &Serial
|
||
|
|
*/
|
||
|
|
void Adafruit_BusIO_Register::print(Stream *s) {
|
||
|
|
uint32_t val = read();
|
||
|
|
s->print("0x"); s->print(val, HEX);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Pretty printer for this register
|
||
|
|
* @param s The Stream to print to, defaults to &Serial
|
||
|
|
*/
|
||
|
|
void Adafruit_BusIO_Register::println(Stream *s) {
|
||
|
|
print(s);
|
||
|
|
s->println();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Create a slice of the register that we can address without touching other bits
|
||
|
|
* @param reg The Adafruit_BusIO_Register which defines the bus/register
|
||
|
|
* @param bits The number of bits wide we are slicing
|
||
|
|
* @param shift The number of bits that our bit-slice is shifted from LSB
|
||
|
|
*/
|
||
|
|
Adafruit_BusIO_RegisterBits::Adafruit_BusIO_RegisterBits(Adafruit_BusIO_Register *reg, uint8_t bits, uint8_t shift) {
|
||
|
|
_register = reg;
|
||
|
|
_bits = bits;
|
||
|
|
_shift = shift;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Read 4 bytes of data from the register
|
||
|
|
* @return data The 4 bytes to read
|
||
|
|
*/
|
||
|
|
uint32_t Adafruit_BusIO_RegisterBits::read(void) {
|
||
|
|
uint32_t val = _register->read();
|
||
|
|
val >>= _shift;
|
||
|
|
return val & ((1 << (_bits)) - 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Write 4 bytes of data to the register
|
||
|
|
* @param data The 4 bytes to write
|
||
|
|
*/
|
||
|
|
void Adafruit_BusIO_RegisterBits::write(uint32_t data) {
|
||
|
|
uint32_t val = _register->read();
|
||
|
|
|
||
|
|
// mask off the data before writing
|
||
|
|
uint32_t mask = (1 << (_bits)) - 1;
|
||
|
|
data &= mask;
|
||
|
|
|
||
|
|
mask <<= _shift;
|
||
|
|
val &= ~mask; // remove the current data at that spot
|
||
|
|
val |= data << _shift; // and add in the new data
|
||
|
|
|
||
|
|
_register->write(val, _register->width());
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief The width of the register data, helpful for doing calculations
|
||
|
|
* @returns The data width used when initializing the register
|
||
|
|
*/
|
||
|
|
uint8_t Adafruit_BusIO_Register::width(void) { return _width; }
|