Matt Briggs
Fork to see if I can get working
Dependencies: BufferedSerial OneWire WinbondSPIFlash libxDot-dev-mbed5-deprecated
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xDotBridge_update_test20180823
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Matt Briggs
DS2408 Class Reference
This class abstracts communicating with the DS2408 port expander. More...
#include <DS2408.h>
Public Member Functions | |
| DS2408 (OneWire *owMaster, uint8_t romAddr[8]) | |
| DS2408 constructor. | |
| CmdResult | registerRead (uint8_t addr, uint8_t &val) |
| registerRead() | |
| CmdResult | pioLogicRead (uint8_t &val) |
| pioLogicRead() | |
| CmdResult | pioLogicReliableRead (uint8_t &val) |
| pioLogicReliableRead() | |
| CmdResult | pioLogicReliableWrite (uint8_t val) |
| pioLogicReliableWrite() | |
| CmdResult | pioLogicWrite (uint8_t val) |
| pioLogicWrite() | |
Detailed Description
This class abstracts communicating with the DS2408 port expander.
The OneWire library is used for physical layer communication and this class simply makes it easy to communicate with this one chip.
Definition at line 19 of file DS2408.h.
Constructor & Destructor Documentation
| DS2408 | ( | OneWire * | owMaster, |
| uint8_t | romAddr[8] | ||
| ) |
DS2408 constructor.
Just initialized internal variables and disables test mode
On Entry:
- Parameters:
-
[in] owMaster - reference to 1-wire master [in] romAddr - 64-bit address of ROM
On Exit:
- Returns:
Definition at line 9 of file DS2408.cpp.
Member Function Documentation
| CmdResult pioLogicRead | ( | uint8_t & | val ) |
Uses regisrterRead to get logic values
On Exit:
- Parameters:
-
[out] val - lsb represents the state of the pio
- Returns:
- Result of operation zero for success
Definition at line 52 of file DS2408.cpp.
| CmdResult pioLogicReliableRead | ( | uint8_t & | val ) |
Uses regisrterRead to get logic values. Then reads again to check for bit errors.
On Exit:
- Parameters:
-
[out] val - lsb represents the state of the pio
- Returns:
- Result of operation zero for success
Definition at line 57 of file DS2408.cpp.
| CmdResult pioLogicReliableWrite | ( | uint8_t | val ) |
writes to pio. Note 0 means active pull down and 1 high-Z to allow PIO to float high. This will automatically retry for DS2408_NRETRIES times.
On Entry:
- Parameters:
-
[in] val - Value for IO.
- Returns:
- CmdResult - result of operation
Definition at line 78 of file DS2408.cpp.
| CmdResult pioLogicWrite | ( | uint8_t | val ) |
writes to pio. Note 0 means active pull down and 1 high-Z to allow PIO to float high.
On Entry:
- Parameters:
-
[in] val - Value for IO.
- Returns:
- CmdResult - result of operation
Definition at line 62 of file DS2408.cpp.
| CmdResult registerRead | ( | uint8_t | addr, |
| uint8_t & | val | ||
| ) |
reads state of pio
On Exit:
- Parameters:
-
[in] addr - per datasheet valid registers are from 0x88 to 0x8D. Note value will be automatically promoted to 16-bit value. [out] val - register value
- Returns:
- Result of operation zero for success
Definition at line 39 of file DS2408.cpp.
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