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@@ -9,12 +9,28 @@ This sketch: |
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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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MCP23018 pin assignments |
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DESTINATION PIN PIN_NUMBER PIN DESTINATION |
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GND VSS 1 28 NC |
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NC 2 27 GPA7 |
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row0 GPB0 3 26 GPA6 |
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row1 GPB1 4 25 GPA5 |
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GPB2 5 24 GPA4 |
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GPB4 7 22 GPA2 |
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GPB5 8 21 GPA1 col1 |
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GPB6 9 20 GPA0 col0 |
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GPB7 10 19 INTA |
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LC 3.3V VCC 11 18 INTB |
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LC 19 SCL 12 17 NC |
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LC 18 SDA 13 16 /RESET VCC |
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NC 14 15 ADDR GND |
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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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#include <Code_LEDLock.h> |
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#include <Row.h> |
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//left matrix |
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@@ -36,28 +52,14 @@ const uint8_t readPinCount = sizeof(readPins)/sizeof(*readPins); |
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Scanner_uC scanner_L(LOW, readPins, readPinCount); |
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/* =============== RIGHT SCANNER =============== |
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The right matrix is scanned by an I/O expander. |
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The MCP23018 address is set by grounding or powering pins. |
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*/ |
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const uint8_t IOE_ADDR = 0x20; //MCP23018 address pin grounded |
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/* |
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Normally all strobe pins are on one port, and all the read pins are on the other port. |
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In this example, portB stobes the row while portA reads the colums. |
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Port_MCP23018 constructor parameters are: deviceAddr, portNum, readPins. |
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readPins is a bit pattern, where 0=output, 1=input. |
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In portA, the first two pins are set to input for reading. |
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"<<" (bit shift left) and "|" (OR) are bitwise operators. |
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Pin numbers to be read are delimited by "|" and to the right of "1<<". |
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*/ |
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// =============== RIGHT SCANNER =============== |
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const uint8_t IOE_ADDR = 0x20; //MCP23018 ADDR pin grounded |
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Port_MCP23018 portA(IOE_ADDR, 0, 1<<0 | 1<<1 ); //read pins 0, 1 |
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Port_MCP23018 portB(IOE_ADDR, 1, 0); |
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Scanner_IOE scanner_R(LOW, portB, portA); |
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/* ================= RIGHT LED ================= |
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The LED_Port constructor parameters are a port and pin number that is connected to an LED. |
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*/ |
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// ================= RIGHT LED ================= |
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LED_Port LED_capsLck(portA, 1<<7); |
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// =================== CODES =================== |
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@@ -71,19 +73,8 @@ 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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Code_LEDLock o_capsLock(KEY_CAPS_LOCK, LED_capsLck);//was testing LED, restore s_4 when done |
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/* =================== ROWS ==================== |
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Left row names contain the letter 'L', while right row names conatain the letter 'R'. |
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Row constructor parameters are: scanner, strobePin, ptrsKeys[], keyCount. |
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strobePin has one of two formats: |
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* if refScanner a Scanner_uC, then strobePin is an Arduino pin number connected to this row |
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* otherwise strobePin is a bit pattern, 1 indicating an IC pin connected to the row |
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*/ |
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/* ---------------- LEFT ROWS ------------------ |
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The left rows have a Scanner_uC and Arduino pin numbers to strobe. |
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*/ |
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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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const uint8_t KEY_COUNT_L0 = sizeof(ptrsKeys_L0)/sizeof(*ptrsKeys_L0); |
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Row row_L0(scanner_L, 0, ptrsKeys_L0, KEY_COUNT_L0); |
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@@ -92,10 +83,8 @@ Key* ptrsKeys_L1[] = { &s_a, &s_b }; |
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const uint8_t KEY_COUNT_L1 = sizeof(ptrsKeys_L1)/sizeof(*ptrsKeys_L1); |
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Row row_L1(scanner_L, 1, ptrsKeys_L1, KEY_COUNT_L1); |
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/* ---------------- RIGHT ROWS ----------------- |
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The right rows have a Scanner_IOE and pin bits to strobe. |
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*/ |
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Key* ptrsKeys_R0[] = { &s_3, &o_capsLock }; |
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// ---------------- RIGHT ROWS ----------------- |
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Key* ptrsKeys_R0[] = { &s_3, &s_4 }; |
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const uint8_t KEY_COUNT_R0 = sizeof(ptrsKeys_R0)/sizeof(*ptrsKeys_R0); |
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Row row_R0(scanner_R, 1<<0, ptrsKeys_R0, KEY_COUNT_R0); |
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@@ -106,7 +95,9 @@ Row row_R1(scanner_R, 1<<1, ptrsKeys_R1, KEY_COUNT_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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delay(6000); |
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Keyboard.print("keybrd_MCP23018.ino "); |
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scanner_R.begin(); |
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} |
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wolfv6
7 years ago
