Version 4.0.0 Improved LCD output

Author: ArminJo

README.md

@@ -1,6 +1,7 @@
 # [SMB](https://github.com/ArminJo/Smart-Battery-Module-Info_For_Arduino) - Smart Battery Module (Laptop Battery Pack) Info
 ### Version 4.0.0
 [![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
+[![Commits since latest](https://img.shields.io/github/commits-since/ArminJo/Smart-Battery-Module-Info_For_Arduino/latest)](https://github.com/ArminJo/Smart-Battery-Module-Info_For_Arduino/commits/master)
 [![Build Status](https://github.com/ArminJo/Smart-Battery-Module-Info_For_Arduino/workflows/TestCompile/badge.svg)](https://github.com/ArminJo/Smart-Battery-Module-Info_For_Arduino/actions)
 [![Hit Counter](https://hitcounter.pythonanywhere.com/count/tag.svg?url=https%3A%2F%2Fgithub.com%2FArminJo%2FSmart-Battery-Module-Info_For_Arduino)](https://github.com/brentvollebregt/hit-counter)
 
@@ -18,8 +19,8 @@ Download and extract the repository. In the Arduino IDE open the sketch with Fil
 
 ## Identifying the right connection
 The minimal connector layout is: | GROUND | THERMISTOR (103AT) | CLOCK | DATA | VCC (11 or 14 volt) | (clock and data my be switched).
-- The **thermistor** connection has 10 kOhms to ground at 25 degree celsius.
-- **Clock** und data connectors have the same resistance (around 1 MOhm) to ground.
+- The **thermistor** connection has 10 kOhm to ground at 25 degree celsius.
+- **Clock** und data connectors have the same resistance (around 0.3 to 1 MOhm) to ground.
 - **VCC** may not be enabled. Sometimes it gets enabled when *Host Present* is connected to ground or clock and data are pulled high to 3.3 or 5 volt.
 
 Some packs (e.g.for IBM-T41 with bq29310) require once an external voltage (e.g. 11 volt) at the VCC connector to initially get alive after full discharge condition.
@@ -35,7 +36,7 @@ Examples:
 After startup, the program scans for a connected I2C device.<br/>
 In version 4.0 a voltage and resistance measurement by means of 4 additional resistors is integrated **to identify the I2C pins**.
 It measures voltage or resistance to ground (if voltage is zero).<br/>
-**The I2c pins have around 300 kOhm to 1000 kOhm**, the thermistor 10 kOhm.
+**The I2c pins have around 300 kOhm to 1000 kOhm**, the thermistor 10 kOhm (sometimes up to 40 kOhm).
 
 You can try different I2C pin combinations until led stops blinking and `Found I2C device attached at address: 0x0B` is printed.
 If you connect clock or data  with the thermistor connector or ground, the scanning stops.<br/>
@@ -195,6 +196,7 @@ Average minutes remaining until empty: 16 h 11 min
 - Integrated voltage and resistance measurement.
 - Major improvements in I2C communication and output.
 - Detection of disconnect.
+- Improved LCD output.
 
 ### Version 3.1.1
 - Better prints at scanning.

SBMInfo/ADCUtils.cpp

@@ -28,11 +28,11 @@
 // Union to speed up the combination of low and high bytes to a word
 // it is not optimal since the compiler still generates 2 unnecessary moves
 // but using  -- value = (high << 8) | low -- gives 5 unnecessary instructions
-union Myword {
+union WordUnionForADCUtils {
     struct {
         uint8_t LowByte;
         uint8_t HighByte;
-    } byte;
+    } UByte;
     uint16_t UWord;
     int16_t Word;
     uint8_t *BytePointer;
@@ -42,7 +42,7 @@ union Myword {
  * Conversion time is defined as 0.104 milliseconds by ADC_PRESCALE in ADCUtils.h.
  */
 uint16_t readADCChannel(uint8_t aChannelNumber) {
-    Myword tUValue;
+    WordUnionForADCUtils tUValue;
     ADMUX = aChannelNumber | (DEFAULT << SHIFT_VALUE_FOR_REFERENCE);
 
     // ADCSRB = 0; // Only active if ADATE is set to 1.
@@ -53,8 +53,8 @@ uint16_t readADCChannel(uint8_t aChannelNumber) {
     loop_until_bit_is_clear(ADCSRA, ADSC);
 
     // Get value
-    tUValue.byte.LowByte = ADCL;
-    tUValue.byte.HighByte = ADCH;
+    tUValue.UByte.LowByte = ADCL;
+    tUValue.UByte.HighByte = ADCH;
     return tUValue.UWord;
     //    return ADCL | (ADCH <<8); // needs 4 bytes more
 }
@@ -63,7 +63,7 @@ uint16_t readADCChannel(uint8_t aChannelNumber) {
  * Conversion time is defined as 0.104 milliseconds by ADC_PRESCALE in ADCUtils.h.
  */
 uint16_t readADCChannelWithReference(uint8_t aChannelNumber, uint8_t aReference) {
-    Myword tUValue;
+    WordUnionForADCUtils tUValue;
     ADMUX = aChannelNumber | (aReference << SHIFT_VALUE_FOR_REFERENCE);
 
     // ADCSRB = 0; // Only active if ADATE is set to 1.
@@ -74,8 +74,8 @@ uint16_t readADCChannelWithReference(uint8_t aChannelNumber, uint8_t aReference)
     loop_until_bit_is_clear(ADCSRA, ADSC);
 
     // Get value
-    tUValue.byte.LowByte = ADCL;
-    tUValue.byte.HighByte = ADCH;
+    tUValue.UByte.LowByte = ADCL;
+    tUValue.UByte.HighByte = ADCH;
     return tUValue.UWord;
 }
 
@@ -160,7 +160,7 @@ uint16_t readADCChannelWithReferenceOversample(uint8_t aChannelNumber, uint8_t a
 
         ADCSRA |= _BV(ADIF); // clear bit to enable recognizing next conversion has finished
         // Add value
-        tSumValue += ADCL | (ADCH << 8); // using myWord does not save space here
+        tSumValue += ADCL | (ADCH << 8); // using WordUnionForADCUtils does not save space here
         // tSumValue += (ADCH << 8) | ADCL; // this does NOT work!
     }
     ADCSRA &= ~_BV(ADATE); // Disable auto-triggering (free running mode)
@@ -189,7 +189,7 @@ uint16_t readADCChannelWithReferenceOversampleFast(uint8_t aChannelNumber, uint8
 
         ADCSRA |= _BV(ADIF); // clear bit to enable recognizing next conversion has finished
         // Add value
-        tSumValue += ADCL | (ADCH << 8); // using myWord does not save space here
+        tSumValue += ADCL | (ADCH << 8); // using WordUnionForADCUtils does not save space here
         // tSumValue += (ADCH << 8) | ADCL; // this does NOT work!
     }
     ADCSRA &= ~_BV(ADATE); // Disable auto-triggering (free running mode)
@@ -217,7 +217,7 @@ uint16_t readADCChannelWithReferenceMultiSamples(uint8_t aChannelNumber, uint8_t
 
         ADCSRA |= _BV(ADIF); // clear bit to enable recognizing next conversion has finished
         // Add value
-        tSumValue += ADCL | (ADCH << 8); // using myWord does not save space here
+        tSumValue += ADCL | (ADCH << 8); // using WordUnionForADCUtils does not save space here
         // tSumValue += (ADCH << 8) | ADCL; // this does NOT work!
     }
     ADCSRA &= ~_BV(ADATE); // Disable auto-triggering (free running mode)

SBMInfo/SBMInfo.ino

@@ -308,7 +308,7 @@ BQ20Z70_PackVoltage, Pack_Voltage, &printVoltage } };
 /*
  * From the specs:
  * Its clock frequency range is 10 kHz to 100 kHz.
- * The charger must NOT charge a battery when it senses the resistance between the Safety Signal pin and ground to be in the range between 425 and 3150 ohms.
+ * The charger must NOT charge a battery when it senses the resistance between the Safety Signal pin and ground to be in the range between 425 and 3150 ohm.
  * E.g. NiMH battery may use a 103AT thermistor for this.
  * Only Read Word, Write Word, Read Block or Write Block protocol is used.
  * bq2084 spec: With SMBus, the most-significant bit (MSB) of a data byte is transmitted first.
@@ -784,16 +784,15 @@ void printCapacity(struct SBMFunctionDescriptionStruct *aSBMFunctionDescription,
         myLCD.print(sDesignCapacity);
         if (sCapacityModePower) {
             myLCD.print('0'); // here we have units of 10 mWh
+            myLCD.print("->");
+        } else {
+            myLCD.print(" -> ");
         }
-        myLCD.print(" -> ");
 //        if (tPercent < 100) {
 //            myLCD.print(' ');
 //        }
         myLCD.print(aCapacity);
-        if (sCapacityModePower) {
-            myLCD.print('0'); // here we have units of 10 mWh
-        }
-        myLCD.print((getCapacityModeUnit() + 1));
+        myLCD.print((getCapacityModeUnit()));
         myLCD.print('h');
 
         Serial.print(" = ");