0.1.6 MCP_ADC

libraries/MCP_ADC/MCP_ADC.cpp

@@ -1,7 +1,7 @@
 //
 //    FILE: MCP_ADC.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.5
+// VERSION: 0.1.6
 //    DATE: 2019-10-24
 // PURPOSE: Arduino library for MCP3002, MCP3004, MCP3008, MCP3202, MCP3204, MCP3208
 //     URL: https://github.com/RobTillaart/MCP_ADC
@@ -35,15 +35,18 @@ void MCP_ADC::begin(uint8_t select)
     if (_useHSPI)      // HSPI
     {
       mySPI = new SPIClass(HSPI);
-      mySPI->begin(14, 12, 13, _select);   // CLK MISO MOSI SELECT
+      mySPI->end();
+      mySPI->begin(14, 12, 13, select);   // CLK=14 MISO=12 MOSI=13
     }
     else               // VSPI
     {
       mySPI = new SPIClass(VSPI);
-      mySPI->begin(18, 19, 23, _select);   // CLK MISO MOSI SELECT
+      mySPI->end();
+      mySPI->begin(18, 19, 23, select);   // CLK=18 MISO=19 MOSI=23
     }
-    #else              // generic SPI
+    #else              // generic hardware SPI
     mySPI = &SPI;
+    mySPI->end();
     mySPI->begin();
     #endif
   }
@@ -65,7 +68,11 @@ void MCP_ADC::setGPIOpins(uint8_t clk, uint8_t miso, uint8_t mosi, uint8_t selec
   _dataIn  = miso;
   _dataOut = mosi;
   _select  = select;
-  mySPI->begin(_clock, miso, _dataOut, _select);  // CLK MISO MOSI SELECT
+  pinMode(_select, OUTPUT);
+  digitalWrite(_select, HIGH);
+
+  mySPI->end();  // disable SPI 
+  mySPI->begin(clk, miso, mosi, select);
 }
 #endif
 

libraries/MCP_ADC/MCP_ADC.h

@@ -2,7 +2,7 @@
 //
 //    FILE: MCP_ADC.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.5
+// VERSION: 0.1.6
 //    DATE: 2019-10-24
 // PURPOSE: Arduino library for MCP_ADC
 //     URL: https://github.com/RobTillaart/MCP_ADC
@@ -13,7 +13,7 @@
 #include "SPI.h"
 
 
-#define MCP_ADC_LIB_VERSION       (F("0.1.5"))
+#define MCP_ADC_LIB_VERSION       (F("0.1.6"))
 
 
 class MCP_ADC
@@ -41,7 +41,8 @@ public:
   void     selectVSPI() { _useHSPI = false; };
   bool     usesHSPI()   { return _useHSPI;  };
   bool     usesVSPI()   { return !_useHSPI; };
-  // to overrule ESP32 default hw pins...
+
+  // to overrule ESP32 default hardware pins
   void     setGPIOpins(uint8_t clk, uint8_t miso, uint8_t mosi, uint8_t select);
   #endif
 

libraries/MCP_ADC/README.md

@@ -86,7 +86,24 @@ Differential channel table
 - **void selectVSPI()** see above.
 - **bool usesHSPI()** returns true if HSPI is used.
 - **bool usesVSPI()** returns true if VSPI is used.
-- **void setGPIOpins(clk, miso, mosi, select)** overrule GPIO pins of ESP32 for hardware SPI.
+
+The **selectVSPI()** or the **selectHSPI()** needs to be called 
+BEFORE the **begin()** function.
+
+
+#### experimental
+
+- **void setGPIOpins(clk, miso, mosi, select)** overrule GPIO pins of ESP32 for hardware SPI. needs to be called 
+AFTER the **begin()** function.
+
+```cpp
+void setup()
+{
+  MCP.selectVSPI();
+  MCP.begin(15);
+  MCP.setGPIOpins(CLK, MISO, MOSI, SELECT);  // SELECT should match the param of begin()
+}
+```
 
 
 ## About SPI Speed
@@ -118,7 +135,6 @@ For hardware SPI the ESP32 uses the VSPI pins. (see ESP examples).
   it actually does float mapping. As it implies the same mapping for all it might 
   not be that useful
 - analogRead (mask, int array\[8\] ) read ports (set in mask) in an array in one call.
-- ESP32 - how to integrate the HSPI interface.
 
 
 ## Operations

libraries/MCP_ADC/library.json

@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/MCP_ADC.git"
   },
-  "version": "0.1.5",
+  "version": "0.1.6",
   "license": "MIT",
   "frameworks": "*",
   "platforms": "*"

libraries/MCP_ADC/library.properties

@@ -1,5 +1,5 @@
 name=MCP_ADC
-version=0.1.5
+version=0.1.6
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino library for MCP3002, MCP3004, MCP3008, MCP3202, MCP3204, MCP3208