mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
0.1.1 MCP3424
This commit is contained in:
Rob Tillaart
parent
188019a4fb
commit
3336a0dced
@ -6,6 +6,14 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
|
||||
and this project adheres to [Semantic Versioning](http://semver.org/).
|
||||
|
||||
|
||||
## [0.1.1] - 2024-09-18
|
||||
- add derived classes for MCP3421/2/3/6/7/8
|
||||
- extend unit tests.
|
||||
- fixed **getMode()** to return 1 (continuous) or 0 (single shot).
|
||||
- fixed math of **floats readVolts()** et al.
|
||||
- update readme.md
|
||||
- minor edits
|
||||
|
||||
## [0.1.0] - 2024-09-15
|
||||
- initial version
|
||||
|
||||
|
||||
@ -1,7 +1,7 @@
|
||||
//
|
||||
// FILE: MCP3424.cpp
|
||||
// AUTHOR: Rob Tillaart
|
||||
// VERSION: 0.1.0
|
||||
// VERSION: 0.1.1
|
||||
// PURPOSE: Arduino library for 18 bit ADC I2C MCP3424 and compatibles.
|
||||
// URL: https://github.com/RobTillaart/MCP3424
|
||||
|
||||
@ -23,8 +23,7 @@ MCP3424::MCP3424(uint8_t address, TwoWire *wire)
|
||||
|
||||
_gain = 1;
|
||||
_bits = 12;
|
||||
_mode = 0; // CONTINUOUS
|
||||
_config = 0x10;
|
||||
_config = 0x10; // default
|
||||
}
|
||||
|
||||
|
||||
@ -60,47 +59,52 @@ int32_t MCP3424::read()
|
||||
}
|
||||
|
||||
|
||||
// shift is to calculate the LSB factor.
|
||||
// 18 bits => 1, LSB == 15.625 uV
|
||||
// 16 bits => 4, LSB == 62.5 uV
|
||||
// 14 bits => 16, LSB == 250 uV
|
||||
// 12 bits => 64 LSB == 1000 uV = 1 mV
|
||||
// must be multiplied to float first to prevent
|
||||
// losing bits due to integer division
|
||||
float MCP3424::readVolts()
|
||||
{
|
||||
// TODO
|
||||
// pre calculate float _factor = 15.625e-6 * pow(2, (_bits - 12))/ _gain;
|
||||
return read() * 15.625e-6 * pow(2, (_bits - 12))/ _gain;
|
||||
return read() * (15.625e-6 * (1L << (18 - _bits))) / _gain;
|
||||
}
|
||||
|
||||
|
||||
float MCP3424::readMilliVolts()
|
||||
{
|
||||
return read() * 15.625e-3 * pow(2, (_bits - 12))/ _gain;
|
||||
return read() * (15.625e-3 * (1L << (18 - _bits))) / _gain;
|
||||
}
|
||||
|
||||
|
||||
float MCP3424::readMicroVolts()
|
||||
{
|
||||
return read() * 15.625e0 * pow(2, (_bits - 12))/ _gain;
|
||||
return read() * (15.625e0 * (1L << (18 - _bits))) / _gain;
|
||||
}
|
||||
|
||||
|
||||
// TODO move to derived class with more than one channel?
|
||||
bool MCP3424::setChannel(uint8_t channel)
|
||||
{
|
||||
if (channel >= _maxChannels)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
// only update if changed
|
||||
if (_channel != channel)
|
||||
{
|
||||
_channel = channel;
|
||||
_config &= 0x1F; // channel = 0
|
||||
if (channel == 1) _config |= 0x20;
|
||||
if (channel == 2) _config |= 0x40;
|
||||
if (channel == 3) _config |= 0x60;
|
||||
// if (channel > 0) => _config |= (channel << 4)
|
||||
if (channel == 1) _config |= 0x20;
|
||||
else if (channel == 2) _config |= 0x40;
|
||||
else if (channel == 3) _config |= 0x60;
|
||||
}
|
||||
writeConfig();
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
// TODO move to derived class with more than one channel?
|
||||
uint8_t MCP3424::getChannel()
|
||||
{
|
||||
return _channel;
|
||||
@ -113,13 +117,14 @@ bool MCP3424::setGain(uint8_t gain)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
// only update if changed.
|
||||
if (_gain != gain)
|
||||
{
|
||||
_gain = gain;
|
||||
_config &= 0xFC; // gain == 1
|
||||
if (_gain == 2) _config |= 0x01;
|
||||
if (_gain == 4) _config |= 0x02;
|
||||
if (_gain == 8) _config |= 0x03;
|
||||
if (_gain == 2) _config |= 0x01;
|
||||
else if (_gain == 4) _config |= 0x02;
|
||||
else if (_gain == 8) _config |= 0x03;
|
||||
writeConfig();
|
||||
}
|
||||
return true;
|
||||
@ -138,13 +143,14 @@ bool MCP3424::setResolution(uint8_t bits)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
// only update if changed.
|
||||
if (_bits != bits)
|
||||
{
|
||||
_bits = bits;
|
||||
_config &= 0xF3; // bits == 12
|
||||
if (_bits == 14) _config |= 0x04;
|
||||
if (_bits == 16) _config |= 0x08;
|
||||
if (_bits == 18) _config |= 0x0C;
|
||||
if (_bits == 14) _config |= 0x04;
|
||||
else if (_bits == 16) _config |= 0x08;
|
||||
else if (_bits == 18) _config |= 0x0C;
|
||||
writeConfig();
|
||||
}
|
||||
return true;
|
||||
@ -153,27 +159,34 @@ bool MCP3424::setResolution(uint8_t bits)
|
||||
|
||||
uint8_t MCP3424::getResolution()
|
||||
{
|
||||
// return 12 + 2 * ((_config >> 2) & 0x03);
|
||||
return _bits;
|
||||
}
|
||||
|
||||
|
||||
void MCP3424::setContinuousMode()
|
||||
{
|
||||
_config &= ~0x10;
|
||||
writeConfig();
|
||||
if (getMode() != 1)
|
||||
{
|
||||
_config |= 0x10;
|
||||
writeConfig();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void MCP3424::setSingleShotMode()
|
||||
{
|
||||
_config |= 0x10;
|
||||
writeConfig();
|
||||
if (getMode() != 0)
|
||||
{
|
||||
_config &= ~0x10;
|
||||
writeConfig();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
uint8_t MCP3424::getMode()
|
||||
{
|
||||
return (_config & 0x10);
|
||||
return (_config & 0x10) ? 1 : 0;
|
||||
}
|
||||
|
||||
|
||||
@ -226,5 +239,42 @@ int32_t MCP3424::readRaw()
|
||||
}
|
||||
|
||||
|
||||
/////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// DERIVED CLASSES
|
||||
//
|
||||
|
||||
MCP3421::MCP3421(uint8_t address, TwoWire *wire) : MCP3424(address, wire)
|
||||
{
|
||||
_maxChannels = 1;
|
||||
}
|
||||
|
||||
MCP3422::MCP3422(uint8_t address, TwoWire *wire) : MCP3424(address, wire)
|
||||
{
|
||||
_maxChannels = 2;
|
||||
}
|
||||
|
||||
MCP3423::MCP3423(uint8_t address, TwoWire *wire) : MCP3424(address, wire)
|
||||
{
|
||||
_maxChannels = 2;
|
||||
}
|
||||
|
||||
MCP3426::MCP3426(uint8_t address, TwoWire *wire) : MCP3424(address, wire)
|
||||
{
|
||||
_maxChannels = 2;
|
||||
}
|
||||
|
||||
MCP3427::MCP3427(uint8_t address, TwoWire *wire) : MCP3424(address, wire)
|
||||
{
|
||||
_maxChannels = 2;
|
||||
}
|
||||
|
||||
MCP3428::MCP3428(uint8_t address, TwoWire *wire) : MCP3424(address, wire)
|
||||
{
|
||||
_maxChannels = 4;
|
||||
}
|
||||
|
||||
|
||||
|
||||
// -- END OF FILE --
|
||||
|
||||
|
||||
@ -2,7 +2,7 @@
|
||||
//
|
||||
// FILE: MCP3424.h
|
||||
// AUTHOR: Rob Tillaart
|
||||
// VERSION: 0.1.0
|
||||
// VERSION: 0.1.1
|
||||
// PURPOSE: Arduino library for 18 bit ADC I2C MCP3424 and compatibles.
|
||||
// URL: https://github.com/RobTillaart/MCP3424
|
||||
|
||||
@ -10,15 +10,9 @@
|
||||
#include "Arduino.h"
|
||||
#include "Wire.h"
|
||||
|
||||
#define MCP3424_LIB_VERSION (F("0.1.0"))
|
||||
#define MCP3424_LIB_VERSION (F("0.1.1"))
|
||||
|
||||
|
||||
// TODO
|
||||
// - ERROR HANDLING
|
||||
// - READ STATUS
|
||||
// - CACHE LAST READ
|
||||
//
|
||||
|
||||
class MCP3424
|
||||
{
|
||||
public:
|
||||
@ -50,12 +44,11 @@ public:
|
||||
uint8_t getMode();
|
||||
|
||||
|
||||
private:
|
||||
protected:
|
||||
uint8_t _maxChannels;
|
||||
uint8_t _channel;
|
||||
uint8_t _gain;
|
||||
uint8_t _bits;
|
||||
uint8_t _mode;
|
||||
uint8_t _config;
|
||||
|
||||
uint8_t _address;
|
||||
@ -66,5 +59,49 @@ private:
|
||||
};
|
||||
|
||||
|
||||
/////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// DERIVED CLASSES
|
||||
//
|
||||
class MCP3421 : public MCP3424
|
||||
{
|
||||
public:
|
||||
MCP3421(uint8_t address = 0x68, TwoWire *wire = &Wire);
|
||||
};
|
||||
|
||||
class MCP3422 : public MCP3424
|
||||
{
|
||||
public:
|
||||
MCP3422(uint8_t address = 0x68, TwoWire *wire = &Wire);
|
||||
};
|
||||
|
||||
class MCP3423 : public MCP3424
|
||||
{
|
||||
public:
|
||||
MCP3423(uint8_t address = 0x68, TwoWire *wire = &Wire);
|
||||
};
|
||||
|
||||
//
|
||||
// max 16 bit
|
||||
//
|
||||
class MCP3426 : public MCP3424
|
||||
{
|
||||
public:
|
||||
MCP3426(uint8_t address = 0x68, TwoWire *wire = &Wire);
|
||||
};
|
||||
|
||||
class MCP3427 : public MCP3424
|
||||
{
|
||||
public:
|
||||
MCP3427(uint8_t address = 0x68, TwoWire *wire = &Wire);
|
||||
};
|
||||
|
||||
class MCP3428 : public MCP3424
|
||||
{
|
||||
public:
|
||||
MCP3428(uint8_t address = 0x68, TwoWire *wire = &Wire);
|
||||
};
|
||||
|
||||
|
||||
// -- END OF FILE --
|
||||
|
||||
|
||||
@ -22,22 +22,25 @@ Library not tested with hardware yet.
|
||||
|
||||
This library is to be used to configure and read the 18 bit MCP4324 4 channel ADC et al.
|
||||
|
||||
The MCP3424 is not a fast ADC, however with 18 bit it has at least a very high
|
||||
The MCP3424 is not a fast ADC, however with 18 bit it has at least a very high
|
||||
resolution. What the effects of the long sampling time means is to be investigated.
|
||||
The high resolution combined with an optional gain of 8x means one could
|
||||
measure voltage in steps of about 2 µV
|
||||
The high resolution combined with an optional gain of 8x means one could
|
||||
measure voltage in steps of about 2 µV.
|
||||
|
||||
The library has three functions that return a reading in volts, millivolts or
|
||||
microvolts to match the need of the user.
|
||||
The library cannot check yet if a conversion is ready.
|
||||
Need hardware to check how this works in detail.
|
||||
|
||||
The library has three functions that return a reading in Volts, milliVolts or
|
||||
microVolts to match the need of the user.
|
||||
|
||||
The user has to configure the ADC device (bits, gain) and can call
|
||||
**read()** (et al) without parameters to keep usage straightforward.
|
||||
|
||||
Current implementation will probably change slightly in the future
|
||||
Current implementation will probably change slightly in the future
|
||||
when related devices will be supported. (See future section).
|
||||
|
||||
|
||||
Alt-230 = µ
|
||||
Alt-230 = µ
|
||||
|
||||
|
||||
### Resolution
|
||||
@ -45,23 +48,33 @@ Alt-230 =
|
||||
| Bits | LSB (gain=1) | SPS | Raw range | Notes |
|
||||
|:------:|---------------:|:------:|:-------------------:|:-------:|
|
||||
| 12 | 1 mV | 240 | -2048 .. 2047 |
|
||||
| 14 | 250 µV | 60 | -8192 .. 8191 |
|
||||
| 16 | 62.5 µV | 15 | -32768 .. 32767 |
|
||||
| 18 | 15.625 µV | 3.75 | -131072 .. 131071 | not for 3426/27/28.
|
||||
| 14 | 250 µV | 60 | -8192 .. 8191 |
|
||||
| 16 | 62.5 µV | 15 | -32768 .. 32767 |
|
||||
| 18 | 15.625 µV | 3.75 | -131072 .. 131071 | not for 3426/27/28.
|
||||
|
||||
The effective resolution also depends on the gain set.
|
||||
In theory with a gain of 8 the LSB of the 18 bit resolution represents
|
||||
1/8 of 15.625 µV == 1.95 µV.
|
||||
If this is feasible in practice is to be seen.
|
||||
In theory with a gain of 8 the LSB of the 18 bit resolution represents
|
||||
1/8 of 15.625 µV == 1.95 µV.
|
||||
If this is feasible in practice is to be seen.
|
||||
|
||||
|
||||
### I2C Address
|
||||
|
||||
The MCP3421 has a fixed address 0x68, one can order different addresses at factory (how?).
|
||||
The MCP3421 and MCP3426 have a fixed address 0x68, one can order different
|
||||
addresses at the factory (how?).
|
||||
|
||||
TODO Table of addresses?
|
||||
The other devices have two address pins to set 8 addresses. The trick is
|
||||
to leave address pins floating. See datasheet table 5.3 for details.
|
||||
|
||||
Max speed ? 400 KHz.
|
||||
|
||||
### I2C Speed
|
||||
|
||||
The MCP342x devices support 100 KHz, 400 KHz and 3.4 MHz.
|
||||
The latter is not (yet) supported by the library.
|
||||
The sketch **MCP3424_performance.ino** can be used to get some insight
|
||||
in the performance. It will check up to 800 kHz.
|
||||
|
||||
TODO verify with hardware.
|
||||
|
||||
|
||||
### I2C multiplexing
|
||||
@ -99,14 +112,14 @@ too if they are behind the multiplexer.
|
||||
|
||||
### Constructor
|
||||
|
||||
TODO other constructors.
|
||||
|
||||
- **MCP3424(uint8_t address = 0x68, TwoWire \*wire = &Wire)**
|
||||
- **MCP3424(uint8_t address = 0x68, TwoWire \*wire = &Wire)**
|
||||
- **bool begin()** initializes the device. POR?
|
||||
- **bool isConnected()** checks if the device address can be seen on I2C bus.
|
||||
- **uint8_t getAddress()** idem, convenience function.
|
||||
- **uint8_t getMaxChannels()** idem, convenience function.
|
||||
|
||||
The MCP3421/2/3/6/7/8 constructors have the same parameters.
|
||||
|
||||
|
||||
### Read
|
||||
|
||||
@ -115,8 +128,8 @@ TODO other constructors.
|
||||
- **float readMilliVolts()** converts the raw reading to millivolts value (wrapper).
|
||||
This is useful for small ranges.
|
||||
- **float readMicroVolts()** converts the raw reading to microvolts value (wrapper).
|
||||
This is useful for very small ranges (especially with a gain of 8 one has a
|
||||
resolution of about 2 microvolts.
|
||||
This is useful for very small ranges (especially with a gain of 8 one has a
|
||||
resolution of about 2 microvolts.
|
||||
|
||||
|
||||
### Configuration
|
||||
@ -128,53 +141,67 @@ Correct settings will be written to the device immediately, but be aware of the
|
||||
that it will take some time before the conversion with new settings is done.
|
||||
|
||||
- **bool setChannel(uint8_t channel = 0)** not to be used for the MCP3421 as
|
||||
it has only one channel. Default is channel 0, parameter should be less than the
|
||||
it has only one channel. Default is channel 0, parameter should be less than the
|
||||
value of **getMaxChannels()**.
|
||||
- **uint8_t getChannel()** returns chosen channel, 0 based. e
|
||||
- **bool setGain(uint8_t gain = 1)** set gain to 1,2,4, or 8.
|
||||
- **uint8_t getChannel()** returns chosen channel (default 0).
|
||||
- **bool setGain(uint8_t gain = 1)** set gain to 1,2,4, or 8.
|
||||
Other values will return false and not change the setting.
|
||||
- **uint8_t getGain()** returns the set gain (default 1).
|
||||
- **bool setResolution(uint8_t bits = 12)** set the bit resolution 12,14,16 or 18.
|
||||
Other values will return false and not change the setting.
|
||||
- **uint8_t getResolution()** returns the set resolution.
|
||||
- **uint8_t getResolution()** returns the set resolution (default 12).
|
||||
- **void setContinuousMode()** idem.
|
||||
- **void setSingleShotMode()** idem.
|
||||
- **uint8_t getMode()** idem.
|
||||
- **uint8_t getMode()** returns 0 for singleShot and 1 for continuous.
|
||||
|
||||
The set function write their changes directly to the device. It might be better
|
||||
to have one function to set all parameters in one call. To be investigated.
|
||||
|
||||
The library caches the last configuration, it is not read back from the device.
|
||||
This might be added in the future.
|
||||
|
||||
|
||||
## Future
|
||||
|
||||
#### Must
|
||||
|
||||
- investigate reading of ready flag
|
||||
- get hardware to test.
|
||||
- redo interface for MCP3424 if needed.
|
||||
- investigate ready flag
|
||||
- investigate continuous vs single shot.
|
||||
- investigate continuous vs single shot mode.
|
||||
- improve documentation
|
||||
|
||||
- Table of addresses.
|
||||
|
||||
#### Should
|
||||
|
||||
- implement support for (separate classes ?)
|
||||
- 18 bit, MCP3421/MCP3422/MCP3423
|
||||
- 16 bit: MCP3426/MCP3427/MCP3428 (no 18 bit so not 100% compatible)
|
||||
- test on different boards.
|
||||
- optimize performance (a lot of same math in conversion to voltage)
|
||||
- optimize performance if possible
|
||||
- check performance I2C with HW
|
||||
- optimize setting all configuration in one function call.
|
||||
- PowerOnReset function for configuration
|
||||
- **setConfig(channel, resolution, gain, mode)** ?
|
||||
- getter needed?
|
||||
- implement PowerOnReset function for configuration
|
||||
|
||||
|
||||
#### Could
|
||||
|
||||
- implement maxResolution (combine with maxChannels? in one "maxValue" byte)
|
||||
- check range in **setResolution()**.
|
||||
- extract gain and resolution from the config byte to reduce storage.
|
||||
- like **getMode()**.
|
||||
- extend examples
|
||||
- array of ADC's
|
||||
- mcp3424_plotter
|
||||
- add error handling
|
||||
- add error variable
|
||||
- check return value **writeConfig()**.
|
||||
- check read() process.
|
||||
|
||||
|
||||
#### Wont
|
||||
|
||||
- cache last read value. (difficult for wrappers)
|
||||
|
||||
|
||||
## Support
|
||||
|
||||
|
||||
@ -1,7 +1,7 @@
|
||||
//
|
||||
// FILE: MCP3424_test.ino
|
||||
// FILE: MCP3424_performance.ino
|
||||
// AUTHOR: Rob Tillaart
|
||||
// PURPOSE: basic test API calls.
|
||||
// PURPOSE: basic performance test API calls.
|
||||
// URL: https://github.com/RobTillaart/MCP3424
|
||||
//
|
||||
// needs a device connected to be able to test.
|
||||
@ -38,6 +38,8 @@ void setup()
|
||||
Serial.println(mcp.getGain());
|
||||
Serial.print("Bits:\t");
|
||||
Serial.println(mcp.getResolution());
|
||||
Serial.print("Mode:\t");
|
||||
Serial.println(mcp.getMode());
|
||||
Serial.println();
|
||||
delay(100);
|
||||
|
||||
|
||||
@ -7,11 +7,9 @@
|
||||
|
||||
#include "MCP3424.h"
|
||||
|
||||
|
||||
MCP3424 mcp;
|
||||
|
||||
|
||||
|
||||
void setup()
|
||||
{
|
||||
Serial.begin(115200);
|
||||
@ -36,6 +34,8 @@ void setup()
|
||||
Serial.println(mcp.getGain());
|
||||
Serial.print("Bits:\t");
|
||||
Serial.println(mcp.getResolution());
|
||||
Serial.print("Mode:\t");
|
||||
Serial.println(mcp.getMode());
|
||||
Serial.println();
|
||||
|
||||
Serial.println("GAIN 1");
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
{
|
||||
"name": "MCP3424",
|
||||
"keywords": "",
|
||||
"keywords": "MCP3421,MCP3422,MCP3423,MCP3426,MCP3427,MCP3428",
|
||||
"description": "Arduino library for 18 bit ADC I2C MCP3424 et al.",
|
||||
"authors":
|
||||
[
|
||||
@ -15,7 +15,7 @@
|
||||
"type": "git",
|
||||
"url": "https://github.com/RobTillaart/MCP3424.git"
|
||||
},
|
||||
"version": "0.1.0",
|
||||
"version": "0.1.1",
|
||||
"license": "MIT",
|
||||
"frameworks": "*",
|
||||
"platforms": "*",
|
||||
|
||||
@ -1,9 +1,9 @@
|
||||
name=MCP3424
|
||||
version=0.1.0
|
||||
version=0.1.1
|
||||
author=Rob Tillaart <rob.tillaart@gmail.com>
|
||||
maintainer=Rob Tillaart <rob.tillaart@gmail.com>
|
||||
sentence=Arduino library for 18 bit ADC I2C MCP3424 et al.
|
||||
paragraph=
|
||||
paragraph=MCP3421,MCP3422,MCP3423,MCP3426,MCP3427,MCP3428
|
||||
category=Sensors
|
||||
url=https://github.com/RobTillaart/MCP3424
|
||||
architectures=*
|
||||
|
||||
@ -29,7 +29,7 @@
|
||||
unittest_setup()
|
||||
{
|
||||
fprintf(stderr, "MCP3424_LIB_VERSION: %s\n", (char *) MCP3424_LIB_VERSION);
|
||||
|
||||
|
||||
Wire.begin();
|
||||
// Wire.setTimeout(10000);
|
||||
}
|
||||
@ -45,15 +45,55 @@ unittest(test_constants)
|
||||
}
|
||||
|
||||
|
||||
unittest(test_constructor)
|
||||
unittest(test_constructors)
|
||||
{
|
||||
MCP3421 mcp1;
|
||||
MCP3422 mcp2;
|
||||
MCP3423 mcp3;
|
||||
MCP3424 mcp4;
|
||||
MCP3426 mcp6;
|
||||
MCP3427 mcp7;
|
||||
MCP3428 mcp8;
|
||||
|
||||
// base class
|
||||
assertEqual(0, mcp4.getChannel());
|
||||
assertEqual(4, mcp4.getMaxChannels());
|
||||
assertEqual(1, mcp4.getGain());
|
||||
assertEqual(12, mcp4.getResolution());
|
||||
assertEqual(1, mcp4.getMode());
|
||||
|
||||
// check MAX channels derived classes
|
||||
assertEqual(1, mcp1.getMaxChannels());
|
||||
assertEqual(2, mcp2.getMaxChannels());
|
||||
assertEqual(2, mcp3.getMaxChannels());
|
||||
assertEqual(4, mcp4.getMaxChannels());
|
||||
assertEqual(2, mcp6.getMaxChannels());
|
||||
assertEqual(2, mcp7.getMaxChannels());
|
||||
assertEqual(4, mcp8.getMaxChannels());
|
||||
}
|
||||
|
||||
|
||||
unittest(test_channel)
|
||||
{
|
||||
MCP3424 mcp;
|
||||
|
||||
assertEqual(0, mcp.getChannel());
|
||||
assertEqual(4, mcp.getMaxChannels());
|
||||
assertEqual(1, mcp.getGain());
|
||||
assertEqual(12, mcp.getResolution());
|
||||
// mode
|
||||
|
||||
assertTrue(mcp.setChannel(1));
|
||||
assertEqual(1, mcp.getChannel());
|
||||
|
||||
assertTrue(mcp.setChannel(2));
|
||||
assertEqual(2, mcp.getChannel());
|
||||
|
||||
assertTrue(mcp.setChannel(3));
|
||||
assertEqual(3, mcp.getChannel());
|
||||
|
||||
// default
|
||||
assertTrue(mcp.setChannel());
|
||||
assertEqual(0, mcp.getChannel());
|
||||
|
||||
// out of range
|
||||
assertFalse(mcp.setChannel(5));
|
||||
}
|
||||
|
||||
|
||||
@ -72,9 +112,11 @@ unittest(test_gain)
|
||||
assertTrue(mcp.setGain(8));
|
||||
assertEqual(8, mcp.getGain());
|
||||
|
||||
// default
|
||||
assertTrue(mcp.setGain());
|
||||
assertEqual(1, mcp.getGain());
|
||||
|
||||
// out of range
|
||||
assertFalse(mcp.setGain(0));
|
||||
}
|
||||
|
||||
@ -94,13 +136,29 @@ unittest(test_resolution)
|
||||
assertTrue(mcp.setResolution(18));
|
||||
assertEqual(18, mcp.getResolution());
|
||||
|
||||
// default
|
||||
assertTrue(mcp.setResolution());
|
||||
assertEqual(12, mcp.getResolution());
|
||||
|
||||
// out of range
|
||||
assertFalse(mcp.setResolution(13));
|
||||
}
|
||||
|
||||
|
||||
unittest(test_mode)
|
||||
{
|
||||
MCP3424 mcp;
|
||||
|
||||
assertEqual(1, mcp.getMode());
|
||||
|
||||
mcp.setSingleShotMode();
|
||||
assertEqual(0, mcp.getMode());
|
||||
|
||||
mcp.setContinuousMode();
|
||||
assertEqual(1, mcp.getMode());
|
||||
}
|
||||
|
||||
|
||||
unittest_main()
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user