add gain=2, non-blocking operation, led abstracted

Metro.cpp

@@ -0,0 +1,61 @@
+
+
+#if defined(ARDUINO) && ARDUINO >= 100
+#include "Arduino.h"
+#else
+#include "WProgram.h"
+#endif
+#include "Metro.h"
+
+Metro::Metro()
+{
+	
+	this->interval_millis = 1000;
+	
+}
+
+
+Metro::Metro(unsigned long interval_millis)
+{
+	
+	this->interval_millis = interval_millis;
+	
+}
+
+
+void Metro::interval(unsigned long interval_millis)
+{
+  this->interval_millis = interval_millis;
+}
+
+uint8_t Metro::check()
+{
+
+  unsigned long now = millis();
+  
+  if ( interval_millis == 0 ){
+    previous_millis = now;
+	return 1;
+  }
+ 
+  if ( (now - previous_millis) >= interval_millis) {
+	#ifdef NOCATCH-UP
+	previous_millis = now ; 
+	#else
+	previous_millis += interval_millis ; 
+	 #endif
+    return 1;
+  }
+  
+  return 0;
+
+}
+
+void Metro::reset() 
+{
+ 
+  this->previous_millis = millis();
+
+}
+
+

Metro.h

@@ -0,0 +1,49 @@
+
+/*
+ *      This program is free software; you can redistribute it and/or modify
+ *      it under the terms of the GNU General Public License as published by
+ *      the Free Software Foundation; either version 2 of the License, or
+ *      (at your option) any later version.
+ *      
+ *      This program is distributed in the hope that it will be useful,
+ *      but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *      GNU General Public License for more details.
+ *      
+ *      You should have received a copy of the GNU General Public License
+ *      along with this program; if not, write to the Free Software
+ *      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ *      MA 02110-1301, USA.
+ */
+
+
+
+/*  * * * * * * * * * * * * * * * * * * * * * * * * * * * 
+ Main code by Thomas O Fredericks (tof@t-o-f.info)
+ Contributions by Paul Bouchier and Benjamin.soelberg
+* * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef Metro_h
+#define Metro_h
+
+#include <inttypes.h>
+
+
+class Metro
+{
+
+public:
+  Metro();
+  Metro(unsigned long interval_millis);
+  void interval(unsigned long interval_millis);
+  uint8_t check();
+  void reset();
+	
+private:
+  unsigned long  previous_millis, interval_millis;
+
+};
+
+#endif
+
+

ModbusThermometer.cpp

@@ -1,30 +1,36 @@
 #include "Arduino.h"
 
 #include "Streaming.h"
+#include "Metro.h"
 
 #include "ads1210.h"
+#include "led.h"
+
+
+const uint8_t LED_PIN = 8;
+const uint8_t ADC_CS_PIN = 9;
+const uint8_t ADC_RDY_PIN = 7;
 
 
 ADS1210 ads1210;
-
+LED led;
+Metro secondTick = Metro(1000); 
 
 
 void setup() {
   Serial.begin(9600);
   delay(1000);
   
-  pinMode(8, OUTPUT);
-
-  ads1210.begin(9, 7);
-  
+  led(LED_PIN);
+  ads1210.begin(ADC_CS_PIN, ADC_RDY_PIN);
 }
 
 void loop() {
-  digitalWrite(8, HIGH);   // turn the LED on (HIGH is the voltage level)
-  delay(1000);              // wait for a second
-  digitalWrite(8, LOW);    // turn the LED off by making the voltage LOW
-  delay(1000);              // wait for a second
+  ads1210.exec();
   
-  uint32_t adcValue = ads1210.get();
-  Serial << "AdcValue: " << adcValue << endl; 
+  if (secondTick.check() == 1) {
+    led.toggle();
+
+    Serial << "AdcValue: " << adc1210.value << endl; 
+  }
 }

ads1210.cpp

@@ -13,8 +13,6 @@
 
 
 
-ADS1210::ADS1210() {
-}
 
 void ADS1210::enableCS() const {
 	digitalWrite(m_csPin, LOW);
@@ -33,10 +31,6 @@ void ADS1210::waitForDRdy() const {
   } 
 }
 
-void ADS1210::waitForDRdyWOTimeout() const {
-  while (0 != digitalRead(m_drdyPin)) {
-  }
-}
 
   
 void ADS1210::writeRegister(const uint8_t regAddr, const uint8_t value) const {
@@ -60,13 +54,13 @@ uint8_t ADS1210::readRegister(const uint8_t regAddr) const {
   return res;
 }
 
-uint32_t ADS1210::readDataOutRegister() const {
+void ADS1210::exec() {
+  if (0 == digitalRead(m_drdyPin)) {
     union {
       uint8_t in[4];
       uint32_t out;
     } res;
   
-  waitForDRdy();
     enableCS();
     SPI.transfer(ADDR_DOR2 | INSR_MB1 | INSR_RW);
     res.in[2] = SPI.transfer(0);
@@ -78,7 +72,8 @@ uint32_t ADS1210::readDataOutRegister() const {
     Serial << "DOR4x8:  " << _HEX(res.in[3]) << " " << _HEX(res.in[2]) << " " << _HEX(res.in[1]) << " " << _HEX(res.in[0]) << endl;
     Serial << "DOR1x32: " << _HEX(res.out) << endl;
 
-  return res.out;
+    value = res.out;
+  }
 }
 
 
@@ -130,13 +125,14 @@ void ADS1210::begin(uint8_t csPin, uint8_t drdyPin) {
   writeRegister(ADDR_CMR3, CMR_SDL | CMR_UB | CMR_REFO);
   Serial << "done." << endl;
 
+  Serial << "Set gain ... ";
+  setGain(CMR_Gain_2);
+  Serial << "done." << endl;
+    
   Serial << "SelfCalibration ... ";
   setMode(CMR_MD_SelfCalibration);
-  waitForDRdyWOTimeout();
+  waitForDRdy();
   Serial << "done." << endl;  
 }
 
 
-uint32_t ADS1210::get() const {
-  return readDataOutRegister();
-}

ads1210.h

@@ -10,10 +10,11 @@
 
 class ADS1210 {
 public:
-	ADS1210();
+	ADS1210() : value(0);
 	void begin(uint8_t csPin, uint8_t drdyPin);
-	uint32_t get() const;
+	void exec();
 
+  uint32_t value;
 private:
 	// register addresses
 	const uint8_t ADDR_DOR2 = 0x00;
@@ -75,11 +76,7 @@ private:
 	void disableCS() const;
 	void writeRegister(const uint8_t regAddr, const uint8_t value) const;
 	uint8_t readRegister(const uint8_t regAddr) const;
-	uint32_t readDataOutRegister() const;
 	void waitForDRdy() const;
-	void waitForDRdyWOTimeout() const;
-	void disableRefO() const;
-	void enableRefO() const;
 	void setMode(uint8_t mode) const;
 	void setGain(uint8_t gain) const;
 };

led.h

@@ -0,0 +1,32 @@
+#ifndef _LED_H_
+#define _LED_H_
+
+#include <Arduino.h>
+#include <stdint.h>
+
+class LED {
+public:
+  LED() : m_state(0) {};
+  void begin(const uint8_t pin) { 
+    m_pin = pin;
+    pinMode(m_pin, OUTPUT);
+    digitalWrite(m_pin, m_state);
+  };
+  void on() {
+    m_state = 1;
+    digitalWrite(m_pin, m_state);
+  }
+  void off() {
+    m_state = 0;
+    digitalWrite(m_pin, m_state);
+  }
+  void toggle() {
+    m_state ^= 1;
+    digitalWrite(m_pin, m_state);
+  }
+private:
+  uint8_t m_state;
+  uint8_t m_pin;
+}
+
+#endif // _LED_H_