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examples/keybrd_PCA9655E/keybrd_PCA9655E.ino
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examples/keybrd_PCA9655E/keybrd_PCA9655E.ino
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/* keybrd_PCA9655E.ino
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Teensy 2.0 controller PCA9655E I/O expander
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| Left | **0** | **1** | | Right | **0** | **1** |
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|:-----:|-------|-------| |:-----:|-------|-------|
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| **1** | 1 | 2 | | **1** | 3 | 4 |
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| **0** | a | b | | **0** | c | d |
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*/
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// ################## GLOBAL ###################
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// ================= INCLUDES ==================
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#include <ScanDelay.h>
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#include <Code_Sc.h>
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//left matrix
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#include <Row_uC.h>
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//right matrix
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#include <Row_IOE.h>
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#include <PortIOE.h>
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#include <PortWrite_PCA9655E.h>
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#include <PortRead_PCA9655E.h>
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// ============ SPEED CONFIGURATION ============
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ScanDelay scanDelay(9000);
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// =============== LEFT uC MATRIX ==============
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const bool Scanner_uC::STROBE_ON = HIGH; //active high
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const bool Scanner_uC::STROBE_OFF = LOW;
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uint8_t readPins_L[] = {0, 1};
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// ============== RIGHT IOE MATRIX =============
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const bool Scanner_Port::STROBE_ON = HIGH; //active high
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const bool Scanner_Port::STROBE_OFF = LOW;
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const uint8_t PortIOE::DEVICE_ADDR = 0x18;
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// ------------------ PORT 1 -------------------
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PortIOE port1_R(1, 0);
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PortWrite_PCA9655E portWrite1_R(port1_R);
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// ------------------ PORT 0 -------------------
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PortIOE port0_R(0, 0);
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PortWrite_PCA9655E portWrite0_R(port0_R);
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PortRead_PCA9655E portRead0_R(port0_R, 1<<0 | 1<<1 );
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// =================== CODES ===================
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Code_Sc s_a(KEY_A);
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Code_Sc s_b(KEY_B);
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Code_Sc s_c(KEY_C);
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Code_Sc s_d(KEY_D);
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Code_Sc s_1(KEY_1);
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Code_Sc s_2(KEY_2);
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Code_Sc s_3(KEY_3);
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Code_Sc s_4(KEY_4);
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// =================== ROWS ====================
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// ---------------- LEFT ROWS ------------------
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Key* ptrsKeys_L0[] = { &s_1, &s_2 };
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uint8_t KEY_COUNT_L0 = sizeof(ptrsKeys_L0)/sizeof(*ptrsKeys_L0);
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Row_uC row_L0(21, readPins_L, KEY_COUNT_L0, ptrsKeys_L0);
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Key* ptrsKeys_L1[] = { &s_a, &s_b };
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uint8_t KEY_COUNT_L1 = sizeof(ptrsKeys_L1)/sizeof(*ptrsKeys_L1);
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Row_uC row_L1(20, readPins_L, KEY_COUNT_L1, ptrsKeys_L1);
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// ---------------- RIGHT ROWS -----------------
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Key* ptrsKeys_R0[] = { &s_3, &s_4 };
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uint8_t KEY_COUNT_R0 = sizeof(ptrsKeys_R0)/sizeof(*ptrsKeys_R0);
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Row_IOE row_R0(portWrite1_R, 1<<0, portRead0_R, KEY_COUNT_R0, ptrsKeys_R0);
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Key* ptrsKeys_R1[] = { &s_c, &s_d };
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uint8_t KEY_COUNT_R1 = sizeof(ptrsKeys_R1)/sizeof(*ptrsKeys_R1);
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Row_IOE row_R1(portWrite1_R, 1<<1, portRead0_R, KEY_COUNT_R1, ptrsKeys_R1);
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// ################### MAIN ####################
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void setup()
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{
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Keyboard.begin();
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Wire.begin(); //Wire.begin() must be called before port begin()
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portWrite1_R.begin();
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portRead0_R.begin();
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}
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void loop()
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{
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//left matrix
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row_L0.process();
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row_L1.process();
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//right matrix
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row_R0.process();
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row_R1.process();
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scanDelay.delay();
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//debug.print_scans_per_second();
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//debug.print_microseconds_per_scan();
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}
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@ -7,15 +7,15 @@
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class PortWriteInterface;
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class PortReadInterface;
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/* Row_IOE is a row connected to an Input/Output Expander.
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Configuration and Instantiation instructions are in keybrd/src/Row_IOE.h
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/* Row_IOE is a row connected to an I/O Expander.
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Configuration and Instantiation instructions are in keybrd/src/Row_uC.h
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*/
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class Row_IOE : public Row
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{
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private:
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Scanner_Port scanner;
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Debouncer_Samples debouncer;
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const uint8_t readPinCount; //number of read pins
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const uint8_t readPinCount;
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public:
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Row_IOE(PortWriteInterface& refPortWrite, const uint8_t strobePin,
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PortReadInterface& refPortRead, const uint8_t readPinCount, Key *const ptrsKeys[])
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@ -1,4 +1,4 @@
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/* keybrd_4c_split_with_IOE_annotated.ino
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/* keybrd_4c_split_with_IOE.ino
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| Left | **0** | **1** | | Right | **0** | **1** |
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|:-----:|-------|-------| |:-----:|-------|-------|
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@ -1,42 +0,0 @@
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/* this works
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The setup is an MCP23S17 I/O expander on a Teensy LC controller.
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MCP23S17 port B pins are alternately grounded and energized.
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portBState is a bitwise reading of port B.
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output is: 10101010
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posted on http://arduino.stackexchange.com/questions/tagged/spi
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http://arduino.stackexchange.com/questions/28792/reading-an-mcp23s17-i-o-expander-port-with-the-arduino-spi-library
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*/
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#include <SPI.h>
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const uint8_t ADDR = 0x20; //MCP23S17 address, all 3 ADDR pins are grounded
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const uint8_t OPCODE_READ = (ADDR << 1 | 0x01); //MCP23S17 opcode read has LSB set
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const uint8_t IODIRB = 0x01;
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const uint8_t GPIOB = 0x13;
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uint8_t portBState = 0; //bit wise
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void setup()
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{
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Serial.begin(9600);
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delay(1000);
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pinMode(SS, OUTPUT); //configure controller's Slave Select pin to output
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digitalWrite(SS, HIGH); //disable Slave Select
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SPI.begin();
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//IODIRB register is already configured to input by default
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SPI.beginTransaction(SPISettings (SPI_CLOCK_DIV8, MSBFIRST, SPI_MODE0)); //gain control of SPI bus
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digitalWrite(SS, LOW); //enable Slave Select
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SPI.transfer(OPCODE_READ); //read command
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SPI.transfer(GPIOB); //register address to read data from
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portBState = SPI.transfer(0); //save the data (0 is dummy data to send)
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digitalWrite(SS, HIGH); //disable Slave Select
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SPI.endTransaction(); //release the SPI bus
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Serial.println(portBState, BIN); //should print 10101010
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}
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void loop() { }
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/* this works with volt meter (MCP23S17 on 3.3v does not output enough power for LEDs)
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LED lights w/o resistor, not light with 56 ohm resistor
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blink LED on MCP23S17 port A pin
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from Example 41.1 - Microchip MCP23017 with Arduino
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http://tronixstuff.com/tutorials > chapter 41
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http://tronixstuff.com/2011/08/26/tutorial-maximising-your-arduinos-io-ports/
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John Boxall | CC by-sa-nc
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from http://69.5.26.215/forum/?id=10945&page=3 #35
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modified to test MCP23S17 (SPI) using syntax from
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http://arduino.stackexchange.com/questions/16348/how-do-you-use-spi-on-an-arduino
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>
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SPISettings from http://arduino.stackexchange.com/questions/14191/mcp23s17-programming-iodirx-register-works-in-loop-but-not-in-setup
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*/
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#include <SPI.h>
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const uint8_t ADDR = 0x20; //MCP23S17 address, all ADDR pins are grounded
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const uint8_t OPCODE_WRITE = (ADDR << 1); //MCP23S17 opcode write has LSB clear
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const uint8_t IODIRA = 0x00; //LEDs are on port A
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const uint8_t GPIOA = 0x12;
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uint8_t LED_state = 0; //bit wise
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void IOEWrite(const uint8_t registerAddr, const uint8_t data)
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{
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SPI.beginTransaction(SPISettings (SPI_CLOCK_DIV8, MSBFIRST, SPI_MODE0)); //slower clock
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digitalWrite(SS, LOW); //enable Slave Select
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SPI.transfer(OPCODE_WRITE); //write command
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SPI.transfer(registerAddr); //register address to write data to
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SPI.transfer(data); //data
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digitalWrite(SS, HIGH); //disable Slave Select
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SPI.endTransaction(); //release the SPI bus
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}
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void setup()
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{
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Serial.begin(9600);
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pinMode(SS, OUTPUT); //configure controller's Slave Select pin to output
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digitalWrite(SS, HIGH); //disable Slave Select
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SPI.begin();
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IOEWrite(IODIRA, 0x00); //configure IODIRA register to output
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}
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void loop()
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{
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IOEWrite(GPIOA, LED_state); //set all GPIOA pins
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delay(2000);
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//Serial.println(LED_state, BIN); //prints alternating 0 and 11111111
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LED_state = ~LED_state; //toggle LED on/off
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}
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