wolfv6
7 years ago
5 changed files with 36 additions and 7 deletions
+ 1
- 1
src/Port_MCP23017.h
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| @@ -5,7 +5,7 @@ | |||
| #include <Wire.h> | |||
| #include <PortInterface.h> | |||
| /* | |||
| /* Port_MCP23017 | |||
| write pins are connected to matrix Row (strobe pin) or LED. | |||
| readPins are connected to matrix column to read which keys are pressed. | |||
+ 2
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src/Port_MCP23018.h
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| @@ -1,7 +1,8 @@ | |||
| #ifndef PORT_MCP23018_H | |||
| #define PORT_MCP23018_H | |||
| #include "Port_MCP23017.h" | |||
| /* | |||
| /* Port_MCP23018 | |||
| write pins are connected to matrix Row (strobe pin) or LED. | |||
| readPins are connected to matrix column to read which keys are pressed. | |||
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src/Port_MCP23S17.h
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| @@ -5,7 +5,7 @@ | |||
| #include <SPI.h> | |||
| #include <PortInterface.h> | |||
| /* | |||
| /* Port_MCP23S17 | |||
| write pins are connected to matrix Row (strobe pin) or LED. | |||
| readPins are connected to matrix column to read which keys are pressed. | |||
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- 0
src/Port_MCP23S18.h
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| @@ -0,0 +1,31 @@ | |||
| #ifndef PORT_MCP23S18_H | |||
| #define PORT_MCP23S18_H | |||
| #include "Port_MCP23S17.h" | |||
| /* Port_MCP23S18 has not been tested. | |||
| write pins are connected to matrix Row (strobe pin) or LED. | |||
| readPins are connected to matrix column to read which keys are pressed. | |||
| Port_MCP23S18 can only be active low (Scanner_IOE::activeState = LOW). | |||
| Open-drain active high would not work because pull down resistors have no effect on sink. | |||
| https://en.wikipedia.org/wiki/Open_collector | |||
| Use LED_PortOpenDrain class for indicator LEDs. | |||
| Example instantiation: | |||
| const uint8_t IOE_ADDR = 0x20; //MCP23S18 address pin grounded | |||
| Port_MCP23S18 portB(IOE_ADDR, 1, 0); //all pins are set to output for strobes and LEDs | |||
| Port_MCP23S18 portA(IOE_ADDR, 0, 1<<0 | 1<<1 ); //pin 0 and pin 1 are set to input for reading, | |||
| //remaining pins can be used for LEDs | |||
| Diode orientation | |||
| ---------------- | |||
| Diode orientation is explained in keybrd_library_user_guide.md > Diode orientation | |||
| */ | |||
| class Port_MCP23S18 : public Port_MCP23S17 | |||
| { | |||
| public: | |||
| Port_MCP23S18(const uint8_t deviceAddr, const uint8_t portNum, const uint8_t readPins) | |||
| : Port_MCP23S17(deviceAddr, portNum, readPins) {} | |||
| }; | |||
| #endif | |||
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src/Port_PCA9655E.h
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| @@ -5,7 +5,7 @@ | |||
| #include <Wire.h> | |||
| #include <PortInterface.h> | |||
| /* | |||
| /* Port_PCA9655E | |||
| write pins are connected to matrix Row (strobe pin) or LED. | |||
| readPins are connected to matrix column to read which keys are pressed. | |||
| @@ -29,9 +29,6 @@ Diode orientation | |||
| ---------------- | |||
| Diode orientation is explained in keybrd_library_user_guide.md > Diode orientation | |||
| PCA9655E data sheet | |||
| ---------------- | |||
| http://www.onsemi.com/pub_link/Collateral/PCA9655E-D.PDF | |||
| */ | |||
| class Port_PCA9655E : public PortInterface | |||