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Reverse order of MCP300X arguments, close #92

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Ben Nuttall
2015-11-15 13:51:49 +00:00
parent 492f311cc4
commit 382d6e45fc
2 changed files with 11 additions and 18 deletions
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19
docs/inputs.md
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@@ -210,29 +210,22 @@ with MCP3008() as pot:
#### Initialisation options
```python
MCP3008(device=0, channel=0)
MCP3008(channel=0, device=0)
```
| Argument | Description | Values | Default |
| -------- | ----------- | ------ | ------- |
| `device` | Which of the two Chip Select SPI pins to access. | Integer: `0` or `1` | `0` |
| `channel` | Which of the 8 ADC channels to access. | Integer: `0` to `7` | `0` |
#### Methods
| Method | Description | Arguments |
| ------ | ----------- | --------- |
| `wait_for_light()` | Halt the program until light is detected. | `timeout` - The number of seconds to wait before proceeding if light is not detected. **Default: `None`** |
| `wait_for_dark()` | Halt the program until darkness is detected. | `timeout` - The number of seconds to wait before proceeding if darkness is not detected. **Default: `None`** |
| `device` | Which of the two Chip Select SPI pins to access. | Integer: `0` or `1` | `0` |
#### Properties
| Property | Description | Type |
| -------- | ----------- | ---- |
| `pin` | The GPIO pin number the sensor is connected to. | Integer |
| `light_detected` | The current state of the sensor (`True` if light; otherwise `False`). | Boolean |
| `when_light` | A reference to the function to be called when light is detected. | `None` or Function |
| `when_dark` | A reference to the function to be called when darkness is detected. | `None` or Function |
| `channel` | The ADC channel the device is connected to. | Integer |
| `device` | The chip select pin the device is connected to. | Integer |
| `value` | The current value of the device. | Float |
| `values` | A generator continuously yielding the device's current value. | Generator |
## MCP3004 Analogue-to-Digital Converter

10
gpiozero/input_devices.py
View File

@@ -3,7 +3,7 @@ from __future__ import (
print_function,
absolute_import,
division,
)
)
import inspect
import warnings
@@ -20,7 +20,7 @@ from .devices import (
GPIODevice,
CompositeDevice,
GPIOQueue,
)
)
class InputDeviceError(GPIODeviceError):
@@ -554,7 +554,7 @@ class AnalogInputDevice(CompositeDevice):
class MCP3008(AnalogInputDevice):
def __init__(self, device=0, channel=0):
def __init__(self, channel=0, device=0):
if not 0 <= channel < 8:
raise InputDeviceError('channel must be between 0 and 7')
super(MCP3008, self).__init__(device=device, bits=10)
@@ -590,9 +590,9 @@ class MCP3008(AnalogInputDevice):
class MCP3004(MCP3008):
def __init__(self, device=0, channel=0):
def __init__(self, channel=0, device=0):
# MCP3004 protocol is identical to MCP3008 but the top bit of the
# channel number must be 0 (effectively restricting it to 4 channels)
if not 0 <= channel < 4:
raise InputDeviceError('channel must be between 0 and 3')
super(MCP3004, self).__init__(device, channel)
super(MCP3004, self).__init__(channel, device)