diff --git a/cpu/msp430-common/lpm_cpu.c b/cpu/msp430-common/lpm_cpu.c
index 26858ce9f0..2c3ad657bf 100644
--- a/cpu/msp430-common/lpm_cpu.c
+++ b/cpu/msp430-common/lpm_cpu.c
@@ -1,26 +1,100 @@
 #include <stdio.h>
+#include <intrinsics.h>   // MSP430-gcc compiler instrinsics
+
+#include "board.h"
+#include <msp430.h>
 
 #include "lpm.h"
 
-/* TODO: implement */
+/* Initialise the MSP430 power-saving mechanisms. */
+void lpm_init(void)
+{
+    // nothing to initialize on MSP430s: everything is done by fiddling
+    //  with 4 bits of the status register (SR).
+
+    // just ensure MCU is fully up and running at start
+    lpm_awake();
+}
+
+/* Change the current power-saving mode. */
 enum lpm_mode lpm_set(enum lpm_mode target)
 {
-    enum lpm_mode last_mode;
+    enum lpm_mode last_mode = lpm_get();
 
-    /* dummy value as lpm is not currently implemented */
-    last_mode = LPM_ON;
+    switch (target)
+    {
+    case LPM_ON:
+        // fully running MCU
+        __bic_status_register(CPUOFF | OSCOFF | SCG0 | SCG1);
+        break;
+    case LPM_IDLE:
+        // lightest mode => LPM0 mode of MSP430
+        __bic_status_register(OSCOFF | SCG0 | SCG1);
+        // only stops CPU block
+        __bis_status_register(CPUOFF);
+        break;
+    case LPM_SLEEP:
+        // mid-level mode => LPM1 mode of MSP430
+        __bic_status_register(OSCOFF | SCG1);
+        // stops CPU and master clock blocks
+        __bis_status_register(CPUOFF | SCG0);
+        break;
+    case LPM_POWERDOWN:
+        // deep-level mode => LPM3 mode of MSP430
+        __bic_status_register(OSCOFF);
+        // stops all blocks except auxiliary clock (timers)
+        __bis_status_register(CPUOFF | SCG0 | SCG1);
+        break;
+    case LPM_OFF:
+        // MCU totally down (LPM4), only RESET or NMI can resume execution
+        __bis_status_register(CPUOFF | OSCOFF | SCG0 | SCG1);  // all blocks off
+        break;
+    default:
+        printf("ERROR: trying to set an invalid low-power mode!\n");
+        printf("       Operation aborted.\n\n");
+    }
 
     return last_mode;
 }
 
+#define LPM_MASK_SR   (CPUOFF | OSCOFF | SCG0 | SCG1)
 
-/* TODO: implement */
-enum lpm_mode lpm_get()
+/* Return the current LPM mode of the MSP430 MCU. */
+enum lpm_mode lpm_get(void)
 {
     enum lpm_mode current_mode;
 
-    /* dummy value as lpm is not currently implemented */
-    current_mode = LPM_ON;
+    unsigned int current_sr = __read_status_register();
+    switch (current_sr & LPM_MASK_SR) {
+    case CPUOFF + OSCOFF + SCG0 + SCG1:   // MSP430's LPM4
+        current_mode = LPM_OFF;
+        break;
+    case CPUOFF + SCG0 + SCG1:   // MSP430's LPM3
+    case CPUOFF + SCG1:   // MSP430's LPM2
+        current_mode = LPM_POWERDOWN;
+        break;
+    case CPUOFF + SCG0:   // MSP430's LPM1
+        current_mode = LPM_SLEEP;
+        break;
+    case CPUOFF:   // MSP430's LPM1
+        current_mode = LPM_IDLE;
+        break;
+    case 0:   // MSP430 active
+        current_mode = LPM_ON;
+        break;
+    }
 
     return current_mode;
 }
+
+/* resume the MSP430 MCU */
+inline void lpm_awake(void)
+{
+    // disable all power savings mechanisms
+    __bic_status_register(CPUOFF | OSCOFF | SCG0 | SCG1);
+}
+
+/* the following two functions have no actual role to play MSP430s */
+inline void lpm_begin_awake(void) { }
+inline void lpm_end_awake(void) { }
+