6 files changed, 30 insertions(+), 0 deletions(-)

M module-bsp/board/linux/lpm/LinuxLPM.cpp
M module-bsp/board/linux/lpm/LinuxLPM.h
M module-bsp/board/rt1051/bsp/lpm/RT1051LPM.cpp
M module-bsp/board/rt1051/bsp/lpm/RT1051LPM.hpp
M module-bsp/bsp/lpm/bsp_lpm.hpp
M module-sys/SystemManager/PowerManager.cpp

@@ 45,4 45,10 @@ namespace bsp
     void LinuxLPM::DisableDcdcPowerSaveMode()
     {}
 
+    void LinuxLPM::DisconnectInternalLoadResistor()
+    {}
+
+    void LinuxLPM::ConnectInternalLoadResistor()
+    {}
+
 } // namespace bsp

@@ 22,6 22,9 @@ namespace bsp
 
         void EnableDcdcPowerSaveMode() final;
         void DisableDcdcPowerSaveMode() final;
+
+        void DisconnectInternalLoadResistor() final;
+        void ConnectInternalLoadResistor() final;
     };
 
 } // namespace bsp

@@ 133,4 133,14 @@ namespace bsp
         gpio_2->WritePin(static_cast<uint32_t>(BoardDefinitions::DCDC_INVERTER_MODE_PIN), 1);
     }
 
+    void RT1051LPM::DisconnectInternalLoadResistor()
+    {
+        DCDC->REG1 &= ~DCDC_REG1_REG_RLOAD_SW_MASK;
+    }
+
+    void RT1051LPM::ConnectInternalLoadResistor()
+    {
+        DCDC->REG1 |= DCDC_REG1_REG_RLOAD_SW_MASK;
+    }
+
 } // namespace bsp

@@ 25,6 25,9 @@ namespace bsp
         void EnableDcdcPowerSaveMode() final;
         void DisableDcdcPowerSaveMode() final;
 
+        void DisconnectInternalLoadResistor() final;
+        void ConnectInternalLoadResistor() final;
+
       private:
         std::shared_ptr<drivers::DriverGPIO> gpio_1;
         std::shared_ptr<drivers::DriverGPIO> gpio_2;

@@ 45,6 45,9 @@ namespace bsp
         virtual void EnableDcdcPowerSaveMode()  = 0;
         virtual void DisableDcdcPowerSaveMode() = 0;
 
+        virtual void DisconnectInternalLoadResistor()  = 0;
+        virtual void ConnectInternalLoadResistor() = 0;
+
       protected:
         CpuFrequencyHz currentFrequency = CpuFrequencyHz::Level_6;
     };

@@ 120,6 120,8 @@ namespace sys
         const auto freq = lowPowerControl->GetCurrentFrequencyLevel();
 
         if (freq == bsp::CpuFrequencyHz::Level_1) {
+            // connect internal the load resistor
+            lowPowerControl->ConnectInternalLoadResistor();
             // turn off power save mode for DCDC inverter
             lowPowerControl->DisableDcdcPowerSaveMode();
             // Switch DCDC to full throttle during oscillator switch


@@ 182,6 184,9 @@ namespace sys
 
             // turn on power save mode for DCDC inverter
             lowPowerControl->EnableDcdcPowerSaveMode();
+
+            // disconnect internal the load resistor
+            lowPowerControl->DisconnectInternalLoadResistor();
         }
 
         isFrequencyLoweringInProgress = true;