add temp read for ext clocked mode

common/config/devConf.h

@@ -23,6 +23,12 @@ static constexpr uint32_t DEFAULT_L3G_SPEED = 976'000;
 static constexpr uint32_t L3G_TRANSITION_DELAY = 5000;
 static constexpr spi::SpiModes DEFAULT_L3G_MODE = spi::SpiModes::MODE_3;
 
+/**
+ * Some MAX1227 could not be reached with frequencies around 4 MHz. Maybe this is caused by
+ * the decoder and buffer circuits. Thus frequency is here defined to 1 MHz.
+ */
+static const uint32_t SUS_MAX1227_SPI_FREQ = 1'000'000;
+
 static constexpr uint32_t DEFAULT_MAX_1227_SPEED = 3'900'000;
 static constexpr spi::SpiModes DEFAULT_MAX_1227_MODE = spi::SpiModes::MODE_3;