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move PortMCP23S17.DEVICE_ADDR from static to local

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This commit is contained in:
wolfv6 2016-09-24 12:08:47 -06:00
parent 6c03b007c4
commit 218a1ce284
3 changed files with 11 additions and 10 deletions
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9
src/PortMCP23S17.cpp
View File

@ -30,6 +30,7 @@ void PortMCP23S17::beginProtocol()
SPI.begin();
SPI.beginTransaction( SPISettings(5000000, MSBFIRST, SPI_MODE0) ); //control SPI bus, 5 MHz
//SPI.endTransaction() not called to release SPI bus because keyboard only has one SPI device
//if two IOEs are used, move beginTransaction() endTransaction() to write() read() functions
}
/* begin() is called from Scanner_IOE::begin().
@ -49,8 +50,8 @@ void PortMCP23S17::begin(const uint8_t strobeOn)
pullUp = 0;
}
transfer(DEVICE_ADDR << 1, portNum, readPins); //configure IODIR
transfer(DEVICE_ADDR << 1, portNum + 0x0C, pullUp); //configure GPPU
transfer(deviceAddr << 1, portNum, readPins); //configure IODIR
transfer(deviceAddr << 1, portNum + 0x0C, pullUp); //configure GPPU
}
/* write() sets pin output to logicLevel (useful for strobePin, one LED pin, or multiple pins).
@ -69,12 +70,12 @@ void PortMCP23S17::write(const uint8_t pin, const bool logicLevel)
outputVal |= pin; //set pin output to high
}
transfer(DEVICE_ADDR << 1, portNum + 0x12, outputVal); //set GPIO port to outputVal
transfer(deviceAddr << 1, portNum + 0x12, outputVal); //set GPIO port to outputVal
}
/* read() returns portState. Only portState pins with pull resistors are valid.
*/
uint8_t PortMCP23S17::read()
{
return transfer( (DEVICE_ADDR << 1) | 1, portNum + 0x12, 0); //read from GPIO
return transfer( (deviceAddr << 1) | 1, portNum + 0x12, 0); //read from GPIO
}

6
src/PortMCP23S17.h
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@ -36,14 +36,14 @@ MCP23S17 data sheet
class PortMCP23S17 : public PortInterface
{
private:
static const uint8_t DEVICE_ADDR;
const uint8_t deviceAddr;
const uint8_t portNum; //port identification number
uint8_t outputVal; //bit pattern for strobe and LEDs
const uint8_t readPins; //bits, IODIR 0=output, 1=input
uint8_t transfer(const uint8_t command, const uint8_t registerAddr, const uint8_t data);
public:
PortMCP23S17(const uint8_t portNum, const uint8_t readPins)
: portNum(portNum), outputVal(0), readPins(readPins) {}
PortMCP23S17(const uint8_t deviceAddr, const uint8_t portNum, const uint8_t readPins)
: deviceAddr(deviceAddr), portNum(portNum), outputVal(0), readPins(readPins) {}
void beginProtocol();
void begin(const uint8_t strobeOn);
virtual void write(const uint8_t pin, const bool logicLevel);

6
tutorials/keybrd_5b_LED_on_IOE/keybrd_5b_LED_on_IOE.ino
View File

@ -46,9 +46,9 @@ LED_uC LED_CapsLck(21);
// =============== RIGHT ===============
// --------------- RIGHT SCANNER ---------------
const uint8_t PortMCP23S17::DEVICE_ADDR = 0x20; //MCP23S17 address, all 3 ADDR pins are grounded
PortMCP23S17 portA(0, 1<<0 | 1<<1 ); //for read and LED
PortMCP23S17 portB(1, 0); //for strobe and LED
const uint8_t IOE_ADDR = 0x20; //MCP23S17 address, all 3 ADDR pins are grounded
PortMCP23S17 portA(IOE_ADDR, 0, 1<<0 | 1<<1 ); //for read and LED
PortMCP23S17 portB(IOE_ADDR, 1, 0); //for strobe and LED
Scanner_IOE scanner_R(LOW, portB, portA);