wolfv6
il y a 7 ans
6 fichiers modifiés avec 34 ajouts et 19 suppressions
+ 16
- 6
src/PortRead_MCP23S17.cpp
Voir le fichier
| PortRead_MCP23S17::begin() is not needed because port direction is already configured to input by default. | PortRead_MCP23S17::begin() is not needed because port direction is already configured to input by default. | ||||
| SPI bus is configured in PortWrite_MCP23S17::begin(). | SPI bus is configured in PortWrite_MCP23S17::begin(). | ||||
| */ | */ | ||||
| void PortRead_MCP23S17::begin() | |||||
| void PortRead_MCP23S17::begin(const uint8_t strobeOn) | |||||
| { | { | ||||
| uint8_t pullUp; //bitwise, 1 means internal pull-up resistor enabled | |||||
| if (strobeOn == LOW) //if active low | |||||
| { | |||||
| pullUp = readPins; | |||||
| } | |||||
| else | |||||
| { | |||||
| pullUp = 0; | |||||
| } | |||||
| pinMode(SS, OUTPUT); //configure controller's Slave Select pin to output | pinMode(SS, OUTPUT); //configure controller's Slave Select pin to output | ||||
| digitalWrite(SS, HIGH); //disable Slave Select | digitalWrite(SS, HIGH); //disable Slave Select | ||||
| SPI.begin(); | SPI.begin(); | ||||
| SPI.beginTransaction(SPISettings (SPI_CLOCK_DIV8, MSBFIRST, SPI_MODE0)); //control SPI bus todo is slow clock needed? | SPI.beginTransaction(SPISettings (SPI_CLOCK_DIV8, MSBFIRST, SPI_MODE0)); //control SPI bus todo is slow clock needed? | ||||
| digitalWrite(SS, LOW); //enable Slave Select | |||||
| digitalWrite(SS, LOW); //enable Slave Select | |||||
| SPI.transfer(port.ADDR << 1); //write command | SPI.transfer(port.ADDR << 1); //write command | ||||
| SPI.transfer(port.num); //configure IODIR | SPI.transfer(port.num); //configure IODIR | ||||
| SPI.transfer(pullUp); //0=output (for LED), 1=input (for read) | |||||
| SPI.transfer(readPins); //0=output (for LED), 1=input (for read) | |||||
| digitalWrite(SS, LOW); //enable Slave Select | digitalWrite(SS, LOW); //enable Slave Select | ||||
| digitalWrite(SS, HIGH); //disable Slave Select | |||||
| digitalWrite(SS, HIGH); //disable Slave Select | |||||
| SPI.transfer(port.ADDR << 1); //write command | SPI.transfer(port.ADDR << 1); //write command | ||||
| SPI.transfer(port.num + 0x0C); //configure GPPU | SPI.transfer(port.num + 0x0C); //configure GPPU | ||||
| SPI.transfer(pullUp); //0=pull-up disabled (for LED), 1=pull-up enabled (for read) | SPI.transfer(pullUp); //0=pull-up disabled (for LED), 1=pull-up enabled (for read) | ||||
| digitalWrite(SS, HIGH); //disable Slave Select | digitalWrite(SS, HIGH); //disable Slave Select | ||||
| //SPI.endTransaction() is not called to release the SPI bus | //SPI.endTransaction() is not called to release the SPI bus | ||||
| // because keyboard only has one SPI device. | // because keyboard only has one SPI device. | ||||
| } | } |
+ 6
- 5
src/PortRead_MCP23S17.h
Voir le fichier
| #include <SPI.h> | #include <SPI.h> | ||||
| #include <PortRead.h> | #include <PortRead.h> | ||||
| #include "PortIOE.h" | #include "PortIOE.h" | ||||
| #include "Scanner_Port.h" | |||||
| /* One MCP23S17 I/O expander port connected to matrix columns. | /* One MCP23S17 I/O expander port connected to matrix columns. | ||||
| Instantiation todo | Instantiation todo | ||||
| ------------ | ------------ | ||||
| pullUp parameter is port's bitwise pin configuration | |||||
| readPins parameter is port's bitwise pin configuration | |||||
| 1=configure as input (for pins connected to column) | 1=configure as input (for pins connected to column) | ||||
| 0=configure as output (for LED or not connected to a column) | 0=configure as output (for LED or not connected to a column) | ||||
| PortIOE port1(1, 0); | PortIOE port1(1, 0); | ||||
| PortRead_MCP23S17 colPort1(port1, 2<<0 | 1<<3 ); | PortRead_MCP23S17 colPort1(port1, 2<<0 | 1<<3 ); | ||||
| pullUp are read from pin 0 on up. | |||||
| readPins are read from pin 0 on up. | |||||
| */ | */ | ||||
| class PortRead_MCP23S17 : public PortRead | class PortRead_MCP23S17 : public PortRead | ||||
| { | { | ||||
| private: | private: | ||||
| PortIOE& port; | PortIOE& port; | ||||
| const uint8_t pullUp; //bitwise, 1 means internal pull-up resistor enabled | |||||
| const uint8_t readPins; //bitwise, 1 means internal pull-up resistor enabled | |||||
| public: | public: | ||||
| PortRead_MCP23S17(PortIOE& port, const uint8_t pullUp) : port(port), pullUp(pullUp) {} | |||||
| void begin(); | |||||
| PortRead_MCP23S17(PortIOE& port, const uint8_t readPins) : port(port), readPins(readPins) {} | |||||
| void begin(const uint8_t strobeOn); | |||||
| virtual uint8_t read(); | virtual uint8_t read(); | ||||
| }; | }; | ||||
| #endif | #endif |
+ 7
- 7
src/PortWrite_MCP23S17.cpp
Voir le fichier
| } | } | ||||
| /* | /* | ||||
| pin is bitwise, where pin being strobed is 1. | |||||
| strobe is HIGH or LOW (for active high or active low). | |||||
| strobePin is bitwise, where pin being strobed is 1. | |||||
| pinLogicLevel is HIGH or LOW. | |||||
| port.outputVal can be shared by LEDs. | port.outputVal can be shared by LEDs. | ||||
| The functions does not reset the other pins so that they can be used for LEDs. | The functions does not reset the other pins so that they can be used for LEDs. | ||||
| */ | */ | ||||
| void PortWrite_MCP23S17::write(const uint8_t pin, const bool strobe) | |||||
| void PortWrite_MCP23S17::write(const uint8_t strobePin, const uint8_t pinLogicLevel) | |||||
| { | { | ||||
| if (strobe == LOW) //if active low | |||||
| if (pinLogicLevel == LOW) | |||||
| { | { | ||||
| port.outputVal &= ~pin; //set pin output to low | |||||
| port.outputVal &= ~strobePin; //set strobePin output to low | |||||
| } | } | ||||
| else //if active high | |||||
| else | |||||
| { | { | ||||
| port.outputVal |= pin; //set pin output to high | |||||
| port.outputVal |= strobePin; //set strobePin output to high | |||||
| } | } | ||||
| writePort(port.num + 0x12, port.outputVal); //set GPIO port pins for stobe and LEDs | writePort(port.num + 0x12, port.outputVal); //set GPIO port pins for stobe and LEDs |
+ 1
- 1
src/PortWrite_MCP23S17.h
Voir le fichier
| public: | public: | ||||
| PortWrite_MCP23S17(PortIOE& port) : port(port) {} | PortWrite_MCP23S17(PortIOE& port) : port(port) {} | ||||
| void begin(); | void begin(); | ||||
| virtual void write(const uint8_t pin, const bool level); | |||||
| virtual void write(const uint8_t pin, const uint8_t level); | |||||
| }; | }; | ||||
| #endif | #endif |
+ 4
- 0
unit_tests/PortRead_MCP23S17/PortRead_MCP23S17.ino
Voir le fichier
| */ | */ | ||||
| #include "PortIOE.h" | #include "PortIOE.h" | ||||
| #include "PortRead_MCP23S17.h" | #include "PortRead_MCP23S17.h" | ||||
| #include "Scanner_Port.h" | |||||
| const bool Scanner_Port::STROBE_ON = LOW; | |||||
| const bool Scanner_Port::STROBE_OFF = HIGH; | |||||
| const uint8_t PortIOE::ADDR = 0x20; //MCP23S17 address, all 3 ADDR pins are grounded | const uint8_t PortIOE::ADDR = 0x20; //MCP23S17 address, all 3 ADDR pins are grounded | ||||
| PortIOE portB(1, 0); | PortIOE portB(1, 0); |