diff --git a/drivers/rcc.c b/drivers/rcc.c
index dc488ec..cf99db1 100644
--- a/drivers/rcc.c
+++ b/drivers/rcc.c
@@ -14,6 +14,9 @@
 
 //--local definitions-----------------------------------------------------------
 
+#define APB1_MASK 0x3afec9ff
+#define APB2_MASK 0x0038fffd
+
 static void apply_default_preset(void);
 static void apply_speed_preset(void);
 
@@ -49,6 +52,36 @@ void rcc_configure(enum RccPreset preset)
 	regs->APB2ENR = apb2_enr;
 }
 
+void rcc_enable_apb1(enum RccApb1 mask)
+{
+	regs->APB1ENR.word |= mask & APB1_MASK;
+}
+
+void rcc_disable_apb1(enum RccApb1 mask)
+{
+	regs->APB1ENR.word &= !(mask & APB1_MASK);
+}
+
+void rcc_reset_apb1(enum RccApb1 mask)
+{
+	regs->APB1RSTR.word &= !(mask & APB1_MASK);
+}
+
+void rcc_enable_apb2(enum RccApb2 mask)
+{
+	regs->APB2ENR.word |= mask & APB2_MASK;
+}
+
+void rcc_disable_apb2(enum RccApb2 mask)
+{
+	regs->APB2ENR.word &= !(mask & APB2_MASK);
+}
+
+void rcc_reset_apb2(enum RccApb2 mask)
+{
+	regs->APB2RSTR.word &= !(mask & APB2_MASK);
+}
+
 
 //--local functions-------------------------------------------------------------
 
diff --git a/drivers/rcc.h b/drivers/rcc.h
index 09d71d4..30455b6 100644
--- a/drivers/rcc.h
+++ b/drivers/rcc.h
@@ -23,6 +23,61 @@ enum RccPreset {
 	RCC_PRESET_SPEED,   //highest clocks, uses 8MHz HSE if available
 };
 
+/**
+ * Available peripherals on the APB1 bus. Note that some of these peripherals
+ * may not be availables on all chips
+ */
+enum RccApb1 {
+	RCC_APB1_TIM2   = (0x1 <<  0),
+	RCC_APB1_TIM3   = (0x1 <<  1),
+	RCC_APB1_TIM4   = (0x1 <<  2),
+	RCC_APB1_TIM5   = (0x1 <<  3),
+	RCC_APB1_TIM6   = (0x1 <<  4),
+	RCC_APB1_TIM7   = (0x1 <<  5),
+	RCC_APB1_TIM12  = (0x1 <<  6),
+	RCC_APB1_TIM13  = (0x1 <<  7),
+	RCC_APB1_TIM14  = (0x1 <<  8),
+	RCC_APB1_WWDG   = (0x1 << 11),
+	RCC_APB1_SPI2   = (0x1 << 14),
+	RCC_APB1_SPI3   = (0x1 << 15),
+	RCC_APB1_USART2 = (0x1 << 17),
+	RCC_APB1_USART3 = (0x1 << 18),
+	RCC_APB1_UART4  = (0x1 << 19),
+	RCC_APB1_UART5  = (0x1 << 20),
+	RCC_APB1_I2C1   = (0x1 << 21),
+	RCC_APB1_I2C2   = (0x1 << 22),
+	RCC_APB1_USB    = (0x1 << 23),
+	RCC_APB1_CAN    = (0x1 << 25),
+	RCC_APB1_BKP    = (0x1 << 27),
+	RCC_APB1_PWR    = (0x1 << 28),
+	RCC_APB1_DAC    = (0x1 << 29),
+};
+
+/**
+ * Available peripherals on the APB2 bus. Note that some of these peripherals
+ * may not be available on all chips
+ */
+enum RccApb2 {
+	RCC_APB2_AFOI  = (0x1 <<  0),
+	RCC_APB2_IOPA  = (0x1 <<  2),
+	RCC_APB2_IOPB  = (0x1 <<  3),
+	RCC_APB2_IOPC  = (0x1 <<  4),
+	RCC_APB2_IOPD  = (0x1 <<  5),
+	RCC_APB2_IOPE  = (0x1 <<  6),
+	RCC_APB2_IOPF  = (0x1 <<  7),
+	RCC_APB2_IOPG  = (0x1 <<  8),
+	RCC_APB2_ADC1  = (0x1 <<  9),
+	RCC_APB2_ADC2  = (0x1 << 10),
+	RCC_APB2_TIM1  = (0x1 << 11),
+	RCC_APB2_SPI1  = (0x1 << 12),
+	RCC_APB2_TIM8  = (0x1 << 13),
+	RCC_APB2_USART = (0x1 << 14),
+	RCC_APB2_ADC3  = (0x1 << 15),
+	RCC_APB2_TIM9  = (0x1 << 19),
+	RCC_APB2_TIM10 = (0x1 << 20),
+	RCC_APB2_TIM11 = (0x1 << 21),
+};
+
 
 //--functions-------------------------------------------------------------------
 
@@ -33,6 +88,48 @@ enum RccPreset {
  */
 void rcc_configure(enum RccPreset preset);
 
+/**
+ * Enables peripherals on the APB1 bus according to the given mask.
+ *
+ * @param mask the mask for the peripherals to enable
+ */
+void rcc_enable_apb1(enum RccApb1 mask);
+
+/**
+ * Disables peripherals on the APB1 bus according to the given mask.
+ *
+ * @param mask the mask for the peripherals to disable
+ */
+void rcc_disable_apb1(enum RccApb1 mask);
+
+/**
+ * Resets peripherals on the APB1 bus according to the given mask.
+ *
+ * @param mask the mask for the peripherals to reset
+ */
+void rcc_reset_apb1(enum RccApb1 mask);
+
+/**
+ * Enables peripherals on the APB2 bus according to the given mask.
+ *
+ * @param mask the mask for the peripherals to enable
+ */
+void rcc_enable_apb2(enum RccApb2 mask);
+
+/**
+ * Disables peripherals on the APB2 bus according to the given mask.
+ *
+ * @param mask the mask for the peripherals to disable
+ */
+void rcc_disable_apb2(enum RccApb2 mask);
+
+/**
+ * Resets peripherals on the APB2 bus according to the given mask.
+ *
+ * @param mask the mask for the peripherals to reset
+ */
+void rcc_reset_apb2(enum RccApb2 mask);
+
 
 #endif //_RCC_H_