some speed optimizations

Links2004 · Links2004 · commit c35ecfe64439 · 2015-05-08T15:33:48.000+02:00
diff --git a/hardware/esp8266com/esp8266/libraries/SPI/SPI.cpp b/hardware/esp8266com/esp8266/libraries/SPI/SPI.cpp
@@ -123,7 +123,11 @@ void SPIClass::setFrequency(uint32_t freq) {
     const spiClk_t minFreqReg = { 0x7FFFF000 };
     uint32_t minFreq = ClkRegToFreq((spiClk_t*) &minFreqReg);
     if(freq < minFreq) {
-        freq = minFreq;
+        // use minimum possible clock
+        setClockDivider(minFreqReg.regValue);
+        lastSetRegister = SPI1CLK;
+        lastSetFrequency = freq;
+        return;
     }
 
     uint8_t calN = 1;
