fix NANO RP2040 (mbed) support (#54)

- fix NANO RP2040 - update and add examples - minor edits
RobTillaart · Jun 13, 2023 · 75fe0f1 · 75fe0f1
1 parent 1d53197
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diff --git a/ADS1X15.cpp b/ADS1X15.cpp
@@ -1,7 +1,7 @@
 //
 //    FILE: ADS1X15.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.3.9
+// VERSION: 0.3.10
 //    DATE: 2013-03-24
 // PUPROSE: Arduino library for ADS1015 and ADS1115
 //     URL: https://github.com/RobTillaart/ADS1X15
@@ -140,6 +140,7 @@ void ADS1X15::reset()
 
 
 #if defined (ESP8266) || defined(ESP32)
+
 bool ADS1X15::begin(int sda, int scl)
 {
   _wire = &Wire;
@@ -148,9 +149,8 @@ bool ADS1X15::begin(int sda, int scl)
   if (! isConnected()) return false;
   return true;
 }
-#endif
 
-#if defined (ARDUINO_ARCH_RP2040)
+#elif defined (ARDUINO_ARCH_RP2040) && !defined(__MBED__)
 
 bool ADS1X15::begin(int sda, int scl)
 {

diff --git a/ADS1X15.h b/ADS1X15.h
@@ -2,7 +2,7 @@
 //
 //    FILE: ADS1X15.H
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.3.9
+// VERSION: 0.3.10
 //    DATE: 2013-03-24
 // PUPROSE: Arduino library for ADS1015 and ADS1115
 //     URL: https://github.com/RobTillaart/ADS1X15
@@ -12,7 +12,7 @@
 #include "Arduino.h"
 #include "Wire.h"
 
-#define ADS1X15_LIB_VERSION               (F("0.3.9"))
+#define ADS1X15_LIB_VERSION               (F("0.3.10"))
 
 //  allow compile time default address
 //  address in { 0x48, 0x49, 0x4A, 0x4B }, no test...
@@ -38,9 +38,7 @@ class ADS1X15
 
 #if defined (ESP8266) || defined(ESP32)
   bool     begin(int sda, int scl);
-#endif
-
-#if defined (ARDUINO_ARCH_RP2040)
+#elif defined (ARDUINO_ARCH_RP2040) && !defined(__MBED__)
   bool    begin(int sda, int scl);
 #endif
 

diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -8,13 +8,18 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - update and add examples
 
 
+## [0.3.10] - 2023-06-07
+- fix NANO RP2040
+- update and add examples
+- minor edits
+
+
 ## [0.3.9] - 2023-01-21
 - update GitHub actions
 - update license 2023
 - update readme.md
 - minor edits
 
-
 ## [0.3.8] - 2022-10-17
 - add RP2040 support (kudos to intubun)
 - simplified changelog.md

diff --git a/examples/ADS_continuous/ADS_continuous.ino b/examples/ADS_continuous/ADS_continuous.ino
@@ -4,14 +4,16 @@
 // PURPOSE: read analog input
 //     URL: https://github.com/RobTillaart/ADS1X15
 
-// test
-// connect 1 potmeter
+//  test
+//  connect 1 potmeter
 //
-// GND ---[   x   ]------ 5V
-//            |
+//  GND ---[   x   ]------ 5V
+//             |
+//
+//  measure at x (connect to AIN0).
+//
+//  See https://github.com/RobTillaart/ADS1X15/issues/49
 //
-// measure at x (connect to AIN0).
-
 
 #include "ADS1X15.h"
 
@@ -24,28 +26,47 @@
 // ADS1114 ADS(0x48);
 ADS1115 ADS(0x48);
 
+uint16_t count = 0;
+uint16_t value = 0;
+uint16_t prev  = 0;
+uint32_t lastTime = 0;
+uint32_t lastSample = 0;
+
 
 void setup()
 {
-  Serial.begin(115200);
+  Serial.begin(500000);
   Serial.println(__FILE__);
   Serial.print("ADS1X15_LIB_VERSION: ");
   Serial.println(ADS1X15_LIB_VERSION);
 
   ADS.begin();
-  ADS.setGain(0);      // 6.144 volt
-  ADS.setDataRate(7);  // 0 = slow   4 = medium   7 = fast
-  ADS.setMode(0);      // continuous mode
-  ADS.readADC(0);      // first read to trigger
+  ADS.setGain(0);      //  6.144 volt
+  ADS.setDataRate(7);  //  0 = slow   4 = medium   7 = fast
+  ADS.setMode(0);      //  continuous mode
+  ADS.readADC(0);      //  first read to trigger
 }
 
 
 void loop()
 {
-  Serial.println(ADS.getValue());
-  // optional other code here
+  uint32_t now = micros();
+  if (now - lastSample >= 1160)   //  almost exact 860 SPS
+  {
+    lastSample = now;
+    value = ADS.getValue();
+    count++;
+    Serial.print(count);
+    Serial.print("\t");
+    Serial.println(value);
+  }
+  if (now - 1000000 >= lastTime)
+  {
+    lastTime = now;
+    count = 0;
+  }
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
 
diff --git a/examples/ADS_performance/ADS_performance.ino b/examples/ADS_performance/ADS_performance.ino
@@ -4,13 +4,15 @@
 // PURPOSE: read analog input
 //     URL: https://github.com/RobTillaart/ADS1X15
 
-// test
-// connect 1 potmeter
+//  test
+//  connect 1 potmeter
 //
-// GND ---[   x   ]------ 5V
-//            |
+//  GND ---[   x   ]------ 5V
+//             |
 //
-// measure at x (connect to AIN0).
+//  measure at x (connect to AIN0).
+//
+//  https://github.com/RobTillaart/ADS1X15/issues/53
 
 
 #include "ADS1X15.h"
@@ -37,6 +39,9 @@ void setup()
   Serial.println(ADS1X15_LIB_VERSION);
 
   ADS.begin();
+
+  Wire.setClock(100000);
+
   ADS.setGain(0);  // 6.144 volt
 
   for (int dr = 0; dr < 8; dr++)
@@ -75,7 +80,10 @@ void test_single_shot()
   }
   d1 = micros() - start;
   Serial.print("\t");
-  Serial.println(d1);
+  Serial.print(d1);                  //  TIME (us)
+  Serial.print("\t\t");
+  Serial.println(100000000.0 / d1);  //  SPS
+  delay(100);
 }
 
 
@@ -92,7 +100,10 @@ void test_continuous()
   }
   d2 = micros() - start;
   Serial.print("\t\t");
-  Serial.println(d2);
+  Serial.print(d2);                  //  TIME (us)
+  Serial.print("\t\t");
+  Serial.println(100000000.0 / d2);  //  SPS
+  delay(100);
 }
 
 

diff --git a/examples/ADS_performance/performance_0.3.9.md b/examples/ADS_performance/performance_0.3.9.md
@@ -0,0 +1,49 @@
+Based upon output of **ADS_performance.ino**
+UNO 16 MHz.
+IDE 1.8.19
+
+
+Synchronous calls  I2C **100 KHz**
+
+|  DataRate  |  Time 100 calls  |  SPS   |
+|:----------:|:----------------:|:------:|
+|  0         |  12861340        |  7.78  |
+|  1         |   6481396        |  15.4  |
+|  2         |   3347512        |  29.9  |
+|  3         |   1724380        |  58.0  |
+|  4         |    941032        |  106   |
+|  5         |    549204        |  182   |
+|  6         |    381340        |  262   |
+|  7         |    269448        |  371   |
+
+
+Synchronous calls  I2C **400 KHz**
+
+|  DataRate  |  Time 100 calls  |  SPS   |
+|:----------:|:----------------:|:------:|
+|  0         |  12872804        |  7.77  |
+|  1         |   6402848        |  15.6  |
+|  2         |   3234156        |  30.9  |
+|  3         |   1649272        |  60.6  |
+|  4         |    862188        |  116   |
+|  5         |    468652        |  213   |
+|  6         |    271552        |  368   |
+|  7         |    173412        |  577   |
+
+
+Synchronous calls  I2C **600 KHz**
+
+|  DataRate  |  Time 100 calls  |  SPS   |
+|:----------:|:----------------:|:------:|
+|  0         |  12736788        |  7.85  |
+|  1         |   6390104        |  15.7  |
+|  2         |   3223568        |  31.0  |
+|  3         |   1645768        |  60.8  |
+|  4         |    852300        |  117   |
+|  5         |    448520        |  223   |
+|  6         |    261216        |  383   |
+|  7         |    167660        |  596   |
+
+These are maxima of the SPS feasible, they do not include further processing.
+At least this test shows the effect of the I2C bus speed.
+
diff --git a/examples/ADS_read/ADS_read.ino b/examples/ADS_read/ADS_read.ino
@@ -4,14 +4,14 @@
 // PURPOSE: read analog inputs - straightforward.
 //     URL: https://github.com/RobTillaart/ADS1X15
 
-// test
-// connect 1 potmeter per port.
+//  test
+//  connect 1 potmeter per port.
 //
-// GND ---[   x   ]------ 5V
-//            |
-//
-// measure at x (connect to AIN0).
+//  GND ---[   x   ]------ 5V
+//             |
 //
+//  measure at x (connect to AIN0).
+
 
 
 #include "ADS1X15.h"

diff --git a/library.json b/library.json
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/ADS1X15"
   },
-  "version": "0.3.9",
+  "version": "0.3.10",
   "license": "MIT",
   "frameworks": "*",
   "platforms": "*",

diff --git a/library.properties b/library.properties
@@ -1,5 +1,5 @@
 name=ADS1X15
-version=0.3.9
+version=0.3.10
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino library for ADS1015 - I2C 12 bit ADC and ADS1115 I2C 16 bit ADC