1 files changed, 18 insertions, 94 deletions

diff --git a/ESS1995i2c/main.cpp b/ESS1995i2c/main.cpp
index 54aa879..efb8e65 100644
--- a/ESS1995i2c/main.cpp
+++ b/ESS1995i2c/main.cpp
@@ -7,6 +7,7 @@
     http://arduino.cc/playground/Code/ATMELTWI
 
     i2c library seems to require a 'register address' - -ESS1995 doesn't need this?
+    it certainly doesn't define a register in control byte 1 of write message
 */
 
 #include "electic.h"
@@ -41,9 +42,20 @@ int main(){
 */
     digitalWrite(CS,HIGH); //select DMM
 
-
-
-    Wire.beginTransmission(ESS1995_ADDR);
+    uint8_t WB1,WB2,WB3,WB4;
+/*
+    uint8_t WB1 = (CB_SHBP << 7) | (CB_function << 3) | (CB_VARCrange);
+    uint8_t WB2 = (CB_BUZfreq << 5) | (CB_ADCrate << 3) | (CB_FREQrange);
+    uint8_t WB3 = (CB_ACmode << 7) | (CB_EXTdiode << 4) | (CB_DCfs << 3) | (CB_LPFbw << 1) | (CB_FREQinprest);
+    uint8_t WB4 = (CB_PEAKmode << 7) | (CB_PCALmode << 6) | (CB_OPconf << 2) | (CB_ADPext);
+*/
+    Wire.beginTransmission(WRITE_ID);
+    Wire.send(WB1);
+    Wire.send(WB2);
+    Wire.send(WB3);
+    Wire.send(WB4);
+    //default reads
+    Wire.endTransmission();
 
 
     uint16_t delayMillis=250;
@@ -97,20 +109,12 @@ writeDMM();
 
     while(1) {
         if (digitalRead(DATA_NEW)==HIGH){ //DMM is ready to send data
-            digitalWrite(OUTPUT1,HIGH);
-            digitalWrite(OUTPUT2,LOW);
-            startWrite();
-            writeStartBit();
-            writeByte(READ_ID);
+            Wire.beginTransmission(READ_ID);
             if (digitalRead(DATA_NEW)==LOW){ //ID confirmed
-                digitalWrite(OUTPUT2,HIGH);
-                startRead();
                 for (int i=0;i<10;i++) {
-                    data[i] = readByte();
+                    data[i] = Wire.receive();
                 }
-                //stop bit comes from the MPU? does seem to be necessary.
-                startWrite();
-                writeStopBit();
+                Wire.endTransmission();
 
                 //parse data
                 DB_STATUS=data[0];
@@ -177,85 +181,5 @@ writeDMM();
         //delay(delayMillis);
     }
 }
-void startWrite() {
-    pinMode(SDATA,OUTPUT);
-    digitalWrite(SCLK, HIGH);
-}
-void startRead() {
-    pinMode(SDATA,INPUT);
-    digitalWrite(SCLK, HIGH);
-}
-void SCLKcycle_W() {
-    //insert a high clock cycle, normally LOW
-    delayMicroseconds(START_DELAY);
-    digitalWrite(SCLK, HIGH);
-    delayMicroseconds(CLOCK_DELAY);
-    digitalWrite(SCLK, LOW);
-    delayMicroseconds(START_DELAY);
-}
-void SCLKcycle_R() {
-    //insert a low clock cycle, normally HIGH
-    delayMicroseconds(START_DELAY);
-    digitalWrite(SCLK, LOW);
-    delayMicroseconds(CLOCK_DELAY);
-    digitalWrite(SCLK, HIGH);
-    delayMicroseconds(START_DELAY);
-}
-void writeByte(uint8_t data){
-
-    for (uint8_t i=0,bit=7;i<8;i++,bit--) {
-        digitalWrite(SDATA,(data>>bit)&0b01);
-        SCLKcycle_W();
-    }
-    digitalWrite(SDATA,HIGH); //ACK/ stopbit should be HIGH?
-    SCLKcycle_W(); //ACK INTERVAL
-}
-void writeStopBit(){
-    digitalWrite(SDATA,LOW); //prepare SDATA
-    delayMicroseconds(START_DELAY);
-    digitalWrite(SCLK,HIGH);
-    delayMicroseconds(START_DELAY);
-    digitalWrite(SDATA,HIGH); //stop bit
-}
-void writeStartBit(){
-    digitalWrite(SDATA, HIGH); //should be anyway
-    digitalWrite(SCLK, HIGH);
-    delayMicroseconds(START_DELAY);
-    digitalWrite(SDATA,LOW); //start bit
-    delayMicroseconds(START_DELAY);
-    digitalWrite(SCLK, LOW);
-    delayMicroseconds(START_DELAY);
-}
-uint8_t readByte(){
-    uint8_t data=0;
-    uint8_t thisdata;
-    //delayMicroseconds(START_DELAY);
-    //digitalWrite(SCLK, HIGH); //load first bit
-    delayMicroseconds(START_DELAY);
-    for (uint8_t i=0,bit=7;i<8;i++,bit--) {
-        thisdata=digitalRead(SDATA);
-        data = data | (thisdata<<bit);
-        digitalWrite(OUTPUT1,thisdata);
-        SCLKcycle_R();
-    }
-    SCLKcycle_R(); //ACK
-    return data;
-}
-void writeDMM(){
-    uint8_t WB1 = (CB_SHBP << 7) | (CB_function << 3) | (CB_VARCrange);
-    uint8_t WB2 = (CB_BUZfreq << 5) | (CB_ADCrate << 3) | (CB_FREQrange);
-    uint8_t WB3 = (CB_ACmode << 7) | (CB_EXTdiode << 4) | (CB_DCfs << 3) | (CB_LPFbw << 1) | (CB_FREQinprest);
-    uint8_t WB4 = (CB_PEAKmode << 7) | (CB_PCALmode << 6) | (CB_OPconf << 2) | (CB_ADPext);
-
-    startWrite();
-    writeStartBit();
-    writeByte(WRITE_ID);
-    writeByte(WB1);
-    writeByte(WB2);
-    writeByte(WB3);
-    writeByte(WB4);
-    writeStopBit();
-
-}