Add Wire:setPins(sda, scl)

Fixes: #3779
espressif · Jul 18, 2020 · 4d98cea · 4d98cea
1 parent b92c58d
commit 4d98cea
Show file tree

Hide file tree

Showing 2 changed files with 15 additions and 0 deletions.
diff --git a/libraries/Wire/src/Wire.cpp b/libraries/Wire/src/Wire.cpp
@@ -58,6 +58,17 @@ TwoWire::~TwoWire()
     }
 }
 
+bool TwoWire::setPins(int sdaPin, int sclPin)
+{
+    if(i2c) {
+        log_e("can not set pins if begin was already called");
+        return false;
+    }
+    sda = sdaPin;
+    scl = sclPin;
+    return true;
+}
+
 bool TwoWire::begin(int sdaPin, int sclPin, uint32_t frequency)
 {
     if(sdaPin < 0) { // default param passed

diff --git a/libraries/Wire/src/Wire.h b/libraries/Wire/src/Wire.h
@@ -67,6 +67,10 @@ class TwoWire: public Stream
 public:
     TwoWire(uint8_t bus_num);
     ~TwoWire();
+
+    //call setPins() first, so that begin() can be called without arguments from libraries
+    bool setPins(int sda, int scl);
+
     bool begin(int sda=-1, int scl=-1, uint32_t frequency=0); // returns true, if successful init of i2c bus
       // calling will attemp to recover hung bus