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Linduino
1.3.0
Linear Technology Arduino-Compatible Demonstration Board
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Library for LTC24XX no-latency delta sigma ADCs with SINC4 rejection. More...
Library for LTC24XX no-latency delta sigma ADCs with SINC4 rejection.
Definition in file LTC24XX_general.cpp.
Go to the source code of this file.
Functions | |
int8_t | LTC24XX_EOC_timeout (uint8_t cs, uint16_t miso_timeout) |
Checks for EOC with a specified timeout. More... | |
void | LTC24XX_SPI_32bit_data (uint8_t cs, int32_t *adc_code) |
Reads from LTC24XX ADC that has no configuration word and returns a 32 bit result. More... | |
void | LTC24XX_SPI_8bit_command_32bit_data (uint8_t cs, uint8_t adc_command, int32_t *adc_code) |
Reads from LTC24XX ADC that accepts an 8 bit configuration and returns a 32 bit result. More... | |
void | LTC24XX_SPI_16bit_command_32bit_data (uint8_t cs, uint8_t adc_command_high, uint8_t adc_command_low, int32_t *adc_code) |
Reads from LTC24XX ADC that accepts a 16 bit configuration and returns a 32 bit result. More... | |
void | LTC24XX_SPI_2ch_ping_pong_32bit_data (uint8_t cs, uint8_t *adc_channel, int32_t *code) |
Reads from LTC24XX two channel "Ping-Pong" ADC, placing the channel information in the adc_channel parameter and returning the 32 bit result with the channel bit cleared so the data format matches the rest of the family. More... | |
void | LTC24XX_SPI_24bit_data (uint8_t cs, int32_t *adc_code) |
Reads from LTC24XX ADC that has no configuration word and returns a 32 bit result. More... | |
void | LTC24XX_SPI_8bit_command_24bit_data (uint8_t cs, uint8_t adc_command, int32_t *adc_code) |
Reads from LTC24XX ADC that accepts an 8 bit configuration and returns a 24 bit output word. More... | |
void | LTC24XX_SPI_16bit_command_24bit_data (uint8_t cs, uint8_t adc_command_high, uint8_t adc_command_low, int32_t *adc_code) |
Reads from LTC24XX ADC that accepts a 16 bit configuration and returns a 24 bit output word. More... | |
void | LTC24XX_SPI_2ch_ping_pong_24bit_data (uint8_t cs, uint8_t *adc_channel, int32_t *code) |
Reads from LTC24XX two channel "Ping-Pong" ADC, placing the channel information in the adc_channel parameter and returning the 24 bit result with the channel bit cleared so the data format matches the rest of the family. More... | |
int8_t | LTC24XX_I2C_8bit_command_24bit_data (uint8_t i2c_address, uint8_t adc_command, int32_t *adc_code, uint16_t eoc_timeout) |
Reads from LTC24XX ADC that accepts an 8 bit configuration and returns a 24 bit result. More... | |
int8_t | LTC24XX_I2C_32bit_data (uint8_t i2c_address, int32_t *adc_code, uint16_t eoc_timeout) |
Reads from LTC24XX ADC that has no configuration word and returns a 32 bit result. More... | |
int8_t | LTC24XX_I2C_8bit_command_32bit_data (uint8_t i2c_address, uint8_t adc_command, int32_t *adc_code, uint16_t eoc_timeout) |
Reads from LTC24XX ADC that accepts an 8 bit configuration and returns a 32 bit result. More... | |
int8_t | LTC24XX_I2C_16bit_command_32bit_data (uint8_t i2c_address, uint8_t adc_command_high, uint8_t adc_command_low, int32_t *adc_code, uint16_t eoc_timeout) |
Reads from LTC24XX ADC that accepts a 16 bit configuration and returns a 32 bit result. More... | |
float | LTC24XX_SE_code_to_voltage (int32_t adc_code, float vref) |
Calculates the voltage corresponding to an ADC code, given the reference voltage. More... | |
float | LTC24XX_diff_code_to_voltage (int32_t adc_code, float vref) |
Calculates the voltage corresponding to an ADC code, given the reference voltage. More... | |
float | LTC24XX_diff_code_to_calibrated_voltage (int32_t adc_code, float LTC2449_lsb, int32_t LTC2449_offset_code) |
Calculates the voltage corresponding to an ADC code, given lsb weight (in volts) and the calibrated ADC offset code (zero code that is subtracted from adc_code). More... | |
void | LTC24XX_calibrate_voltage (int32_t zero_code, int32_t fs_code, float zero_voltage, float fs_voltage, float *LTC24XX_lsb, int32_t *LTC24XX_offset_code) |
Calculate the lsb weight and offset code given a full-scale code and a measured zero-code. More... | |
void LTC24XX_calibrate_voltage | ( | int32_t | zero_code, |
int32_t | fs_code, | ||
float | zero_voltage, | ||
float | fs_voltage, | ||
float * | LTC24XX_lsb, | ||
int32_t * | LTC24XX_offset_code | ||
) |
Calculate the lsb weight and offset code given a full-scale code and a measured zero-code.
zero_code | Measured code with the inputs shorted to ground |
fs_code | Measured code at nearly full-scale |
zero_voltage | Measured zero voltage |
fs_voltage | Voltage measured at input (with voltmeter) when fs_code was read from ADC |
LTC24XX_lsb | Overwritten with lsb weight (in volts) |
LTC24XX_offset_code | Overwritten with offset code (zero code) |
Definition at line 427 of file LTC24XX_general.cpp.
float LTC24XX_diff_code_to_calibrated_voltage | ( | int32_t | adc_code, |
float | LTC24XX_lsb, | ||
int32_t | LTC24XX_offset_code | ||
) |
Calculates the voltage corresponding to an ADC code, given lsb weight (in volts) and the calibrated ADC offset code (zero code that is subtracted from adc_code).
Applies to differential input, SPI interface parts.
adc_code | Code read from ADC |
LTC2449_lsb | LSB weight (in volts) |
LTC2449_offset_code | The calibrated offset code (This is the ADC code zero code that will be subtracted from adc_code) |
Definition at line 409 of file LTC24XX_general.cpp.
float LTC24XX_diff_code_to_voltage | ( | int32_t | adc_code, |
float | vref | ||
) |
Calculates the voltage corresponding to an ADC code, given the reference voltage.
Applies to differential input parts (LTC2410 type input)
adc_code | Code read from ADC |
vref | Reference voltage |
Definition at line 389 of file LTC24XX_general.cpp.
int8_t LTC24XX_EOC_timeout | ( | uint8_t | cs, |
uint16_t | miso_timeout | ||
) |
Checks for EOC with a specified timeout.
Applies to all SPI interface delta sigma ADCs that have SINC4 rejection, does NOT apply to LTC2450/60/70 family.
cs | Chip Select pin |
miso_timeout | Timeout (in milliseconds) |
Definition at line 82 of file LTC24XX_general.cpp.
int8_t LTC24XX_I2C_16bit_command_32bit_data | ( | uint8_t | i2c_address, |
uint8_t | adc_command_high, | ||
uint8_t | adc_command_low, | ||
int32_t * | adc_code, | ||
uint16_t | eoc_timeout | ||
) |
Reads from LTC24XX ADC that accepts a 16 bit configuration and returns a 32 bit result.
i2c_address | I2C address of device |
adc_command_high | First command byte written to LTC24XX |
adc_command_low | Second command written to LTC24XX |
adc_code | 4 byte conversion code read from LTC24XX |
eoc_timeout | Timeout (in milliseconds) |
Definition at line 350 of file LTC24XX_general.cpp.
int8_t LTC24XX_I2C_32bit_data | ( | uint8_t | i2c_address, |
int32_t * | adc_code, | ||
uint16_t | eoc_timeout | ||
) |
Reads from LTC24XX ADC that has no configuration word and returns a 32 bit result.
Data is formatted to match the SPI devices, with the MSB in the bit 28 position.
i2c_address | I2C address of device |
adc_code | 4 byte conversion code read from LTC24XX |
eoc_timeout | Timeout (in milliseconds) |
Definition at line 298 of file LTC24XX_general.cpp.
int8_t LTC24XX_I2C_8bit_command_24bit_data | ( | uint8_t | i2c_address, |
uint8_t | adc_command, | ||
int32_t * | adc_code, | ||
uint16_t | eoc_timeout | ||
) |
Reads from LTC24XX ADC that accepts an 8 bit configuration and returns a 24 bit result.
Reads from LTC24XX ADC that accepts an 8 bit configuration and returns a 32 bit result.
i2c_address | I2C address of device |
adc_command | 1 byte command written to LTC24XX |
adc_code | 4 byte conversion code read from LTC24XX |
eoc_timeout | Timeout (in milliseconds) |
Definition at line 268 of file LTC24XX_general.cpp.
int8_t LTC24XX_I2C_8bit_command_32bit_data | ( | uint8_t | i2c_address, |
uint8_t | adc_command, | ||
int32_t * | adc_code, | ||
uint16_t | eoc_timeout | ||
) |
Reads from LTC24XX ADC that accepts an 8 bit configuration and returns a 32 bit result.
i2c_address | I2C address of device |
adc_command | 1 byte command written to LTC24XX |
adc_code | 4 byte conversion code read from LTC24XX |
eoc_timeout | Timeout (in milliseconds) |
Definition at line 326 of file LTC24XX_general.cpp.
float LTC24XX_SE_code_to_voltage | ( | int32_t | adc_code, |
float | vref | ||
) |
Calculates the voltage corresponding to an ADC code, given the reference voltage.
Applies to Single-Ended input parts (LTC2400-type input)
adc_code | Code read from ADC |
vref | Reference voltage |
Definition at line 375 of file LTC24XX_general.cpp.
void LTC24XX_SPI_16bit_command_24bit_data | ( | uint8_t | cs, |
uint8_t | adc_command_high, | ||
uint8_t | adc_command_low, | ||
int32_t * | adc_code | ||
) |
Reads from LTC24XX ADC that accepts a 16 bit configuration and returns a 24 bit output word.
Reads from LTC24XX ADC that accepts a 16 bit configuration and returns a 32 bit result.
cs | Chip Select pin |
adc_command_high | First command byte written to LTC24XX |
adc_command_low | Second command written to LTC24XX |
adc_code | 4 byte conversion code read from LTC24XX |
Definition at line 216 of file LTC24XX_general.cpp.
void LTC24XX_SPI_16bit_command_32bit_data | ( | uint8_t | cs, |
uint8_t | adc_command_high, | ||
uint8_t | adc_command_low, | ||
int32_t * | adc_code | ||
) |
Reads from LTC24XX ADC that accepts a 16 bit configuration and returns a 32 bit result.
cs | Chip Select pin |
adc_command_high | First command byte written to LTC24XX |
adc_command_low | Second command written to LTC24XX |
adc_code | 4 byte conversion code read from LTC24XX |
Definition at line 136 of file LTC24XX_general.cpp.
void LTC24XX_SPI_24bit_data | ( | uint8_t | cs, |
int32_t * | adc_code | ||
) |
Reads from LTC24XX ADC that has no configuration word and returns a 32 bit result.
cs | Chip Select pin |
adc_code | 4 byte conversion code read from LTC24XX |
Definition at line 176 of file LTC24XX_general.cpp.
void LTC24XX_SPI_2ch_ping_pong_24bit_data | ( | uint8_t | cs, |
uint8_t * | adc_channel, | ||
int32_t * | code | ||
) |
Reads from LTC24XX two channel "Ping-Pong" ADC, placing the channel information in the adc_channel parameter and returning the 24 bit result with the channel bit cleared so the data format matches the rest of the family.
Reads from LTC24XX two channel "Ping-Pong" ADC, placing the channel information in the adc_channel parameter and returning the 32 bit result with the channel bit cleared so the data format matches the rest of the family.
cs | Chip Select pin |
adc_channel | Returns channel number read. |
code | 4 byte conversion code read from LTC24XX |
Definition at line 239 of file LTC24XX_general.cpp.
void LTC24XX_SPI_2ch_ping_pong_32bit_data | ( | uint8_t | cs, |
uint8_t * | adc_channel, | ||
int32_t * | code | ||
) |
Reads from LTC24XX two channel "Ping-Pong" ADC, placing the channel information in the adc_channel parameter and returning the 32 bit result with the channel bit cleared so the data format matches the rest of the family.
cs | Chip Select pin |
adc_channel | Returns channel number read. |
code | 4 byte conversion code read from LTC24XX |
Definition at line 155 of file LTC24XX_general.cpp.
void LTC24XX_SPI_32bit_data | ( | uint8_t | cs, |
int32_t * | adc_code | ||
) |
Reads from LTC24XX ADC that has no configuration word and returns a 32 bit result.
cs | Chip Select pin |
adc_code | 4 byte conversion code read from LTC24XX |
Definition at line 103 of file LTC24XX_general.cpp.
void LTC24XX_SPI_8bit_command_24bit_data | ( | uint8_t | cs, |
uint8_t | adc_command, | ||
int32_t * | adc_code | ||
) |
Reads from LTC24XX ADC that accepts an 8 bit configuration and returns a 24 bit output word.
Reads from LTC24XX ADC that accepts an 8 bit configuration and returns a 32 bit result.
cs | Chip Select pin |
adc_command | 1 byte command written to LTC24XX |
adc_code | 4 byte conversion code read from LTC24XX |
Definition at line 195 of file LTC24XX_general.cpp.
void LTC24XX_SPI_8bit_command_32bit_data | ( | uint8_t | cs, |
uint8_t | adc_command, | ||
int32_t * | adc_code | ||
) |
Reads from LTC24XX ADC that accepts an 8 bit configuration and returns a 32 bit result.
cs | Chip Select pin |
adc_command | 1 byte command written to LTC24XX |
adc_code | 4 byte conversion code read from LTC24XX |
Definition at line 118 of file LTC24XX_general.cpp.