allow non-standard digital control pins

examples/HandyTalkie/HandyTalkie.ino

@@ -20,6 +20,8 @@
 
 // create object for radio
 HamShield radio;
+// To use non-standard pins, use the following initialization
+//HamShield radio(ncs_pin, clk_pin, dat_pin);
 
 #define LED_PIN 13
 #define RSSI_REPORT_RATE_MS 5000
@@ -50,9 +52,10 @@ void setup() {
   
   // initialize serial communication
   Serial.begin(9600);
-  Serial.println("press the switch to begin...");
+  Serial.println("press the switch or send any character to begin...");
   
-  while (digitalRead(SWITCH_PIN));
+  while (digitalRead(SWITCH_PIN) && !Serial.available());
+  Serial.read(); // flush
   
   // let the AU ot of reset
   digitalWrite(RESET_PIN, HIGH);

src/HamShield.cpp

@@ -120,40 +120,19 @@ const unsigned char AFSK_space[] PROGMEM = { 140, 228, 250, 166, 53, 0, 53, 166,
 volatile int ptt = false;
 volatile long bouncer = 0;
 
-/** Default constructor, uses default I2C address.
- * @see A1846S_DEFAULT_ADDRESS
- */
-HamShield::HamShield() {
-    devAddr = A1; // devAddr is the chip select pin used by the HamShield
-    sHamShield = this;
-    
-    pinMode(devAddr, OUTPUT);
-    digitalWrite(devAddr, HIGH);
-    pinMode(CLK, OUTPUT);
-    digitalWrite(CLK, HIGH);
-    pinMode(DAT, OUTPUT);
-    digitalWrite(DAT, HIGH);
-}
-
 /** Specific address constructor.
  * @param chip select pin for HamShield
  * @see A1846S_DEFAULT_ADDRESS
  * @see A1846S_ADDRESS_AD0_LOW
  * @see A1846S_ADDRESS_AD0_HIGH
  */
-HamShield::HamShield(uint8_t cs_pin) {
+HamShield::HamShield(uint8_t cs_pin = nSEN, uint8_t clk_pin = CLK, uint8_t dat_pin = DAT) {
     devAddr = cs_pin;
     
-    pinMode(devAddr, OUTPUT);
+    HSsetPins(cs_pin, clk_pin, dat_pin);
-    digitalWrite(devAddr, HIGH);
-    pinMode(CLK, OUTPUT);
-    digitalWrite(CLK, HIGH);
-    pinMode(DAT, OUTPUT);
-    digitalWrite(DAT, HIGH);
 }
 
 
-
 /** Power on and prepare for general usage.
  * 
  */

src/HamShield.h

@@ -233,8 +233,7 @@ class HamShield {
 	    // public singleton for ISRs to reference
         static HamShield *sHamShield; // HamShield singleton, used for ISRs mostly
 
-        HamShield();
+		HamShield(uint8_t cs_pin = nSEN, uint8_t clk_pin = CLK, uint8_t dat_pin = DAT);
-        HamShield(uint8_t cs_pin);
 
         void initialize();  // defaults to 12.5kHz
 		void initialize(bool narrowBand); // select 12.5kHz if true or 25kHz if false

src/HamShield_comms.cpp

@@ -4,6 +4,26 @@
 
 #include "HamShield_comms.h"
 
+
+
+uint8_t ncs_pin = nSEN;
+uint8_t clk_pin = CLK;
+uint8_t dat_pin = DAT;
+
+void HSsetPins(uint8_t ncs, uint8_t clk, uint8_t dat) {
+    ncs_pin = ncs;
+    clk_pin = clk;
+    dat_pin = dat;
+    
+    pinMode(ncs_pin, OUTPUT);
+    digitalWrite(ncs_pin, HIGH);
+    pinMode(clk_pin, OUTPUT);
+    digitalWrite(clk_pin, HIGH);
+    pinMode(dat_pin, OUTPUT);
+    digitalWrite(dat_pin, HIGH);
+
+}
+
 int8_t HSreadBitW(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint16_t *data)
 {
     uint16_t b;
@@ -33,22 +53,22 @@ int8_t HSreadWord(uint8_t devAddr, uint8_t regAddr, uint16_t *data)
 	uint16_t temp_dat;
 	// bitbang for great justice!
 	*data = 0;
-	pinMode(DAT, OUTPUT);
+	pinMode(dat_pin, OUTPUT);
 	regAddr = regAddr | (1 << 7);
 	
 	digitalWrite(devAddr, 0); //PORTC &= ~(1<<1); //devAddr used as chip select
 	for (int i = 0; i < 8; i++) {
 		temp = ((regAddr & (0x80 >> i)) != 0);
-		digitalWrite(CLK, 0); //PORTC &= ~(1<<5); //
+		digitalWrite(clk_pin, 0); //PORTC &= ~(1<<5); //
-		digitalWrite(DAT, temp);
+		digitalWrite(dat_pin, temp);
-		digitalWrite(CLK, 1); //PORTC |= (1<<5); //
+		digitalWrite(clk_pin, 1); //PORTC |= (1<<5); //
 	}
-	// change direction of DAT
+	// change direction of dat_pin
-	pinMode(DAT, INPUT); //	DDRC &= ~(1<<4); //
+	pinMode(dat_pin, INPUT); //	DDRC &= ~(1<<4); //
 	for (int i = 15; i >= 0; i--) {
-		digitalWrite(CLK, 0); //PORTC &= ~(1<<5); //
+		digitalWrite(clk_pin, 0); //PORTC &= ~(1<<5); //
-		digitalWrite(CLK, 1); //PORTC |= (1<<5); //
+		digitalWrite(clk_pin, 1); //PORTC |= (1<<5); //
-		temp_dat = digitalRead(DAT); //((PINC & (1<<4)) != 0);
+		temp_dat = digitalRead(dat_pin); //((PINC & (1<<4)) != 0);
 		temp_dat = temp_dat << i;
 		*data |= temp_dat;
 	}
@@ -91,21 +111,21 @@ bool HSwriteWord(uint8_t devAddr, uint8_t regAddr, uint16_t data)
 	//digitalWrite(13, HIGH);
 	
 	// bitbang for great justice!
-	pinMode(DAT, OUTPUT);
+	pinMode(dat_pin, OUTPUT);
 	regAddr = regAddr & ~(1 << 7);
 	
 	digitalWrite(devAddr, 0); // PORTC &= ~(1<<1); //CS
 	for (int i = 0; i < 8; i++) {
 		temp_reg = ((regAddr & (0x80 >> i)) != 0);
-		digitalWrite(CLK, 0); //PORTC &= ~(1<<5); //
+		digitalWrite(clk_pin, 0); //PORTC &= ~(1<<5); //
-		digitalWrite(DAT, regAddr & (0x80 >> i));
+		digitalWrite(dat_pin, regAddr & (0x80 >> i));
-		digitalWrite(CLK, 1); // PORTC |= (1<<5); //
+		digitalWrite(clk_pin, 1); // PORTC |= (1<<5); //
 	}
 	for (int i = 0; i < 16; i++) {
 		temp_dat = ((data & (0x8000 >> i)) != 0);
-		digitalWrite(CLK, 0); //PORTC &= ~(1<<5); //
+		digitalWrite(clk_pin, 0); //PORTC &= ~(1<<5); //
-		digitalWrite(DAT, temp_dat);
+		digitalWrite(dat_pin, temp_dat);
-		digitalWrite(CLK, 1); // PORTC |= (1<<5); //
+		digitalWrite(clk_pin, 1); // PORTC |= (1<<5); //
 	}
 	
 	digitalWrite(devAddr, 1); //PORTC |= (1<<1); //CS

src/HamShield_comms.h

@@ -11,6 +11,8 @@
 #define CLK A5
 #define DAT A4
 
+void HSsetPins(uint8_t ncs, uint8_t clk, uint8_t dat);
+
 int8_t HSreadBitW(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint16_t *data);
 int8_t HSreadBitsW(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint16_t *data);
 int8_t HSreadWord(uint8_t devAddr, uint8_t regAddr, uint16_t *data);