ST STM32F31xx

UM1581
Reset and clock control (RCC)
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 RCC_AHBPeriph_GPIOB :
 RCC_AHBPeriph_GPIOC :
 RCC_AHBPeriph_GPIOD :
 RCC_AHBPeriph_GPIOE :
 RCC_AHBPeriph_GPIOF :
 RCC_AHBPeriph_TS :
 RCC_AHBPeriph_CRC :
 RCC_AHBPeriph_FLITF :
 RCC_AHBPeriph_SRAM :
 RCC_AHBPeriph_DMA2 :
 RCC_AHBPeriph_DMA1 :
 RCC_AHBPeriph_ADC34 :
 RCC_AHBPeriph_ADC12 :
 NewState : new state of the specified peripheral clock. This
parameter can be: ENABLE or DISABLE.
Return values
 None.
Notes
 After reset, the peripheral clock (used for registers read/write
access) is disabled and the application software has to enable
this clock before using it.
18.2.8.11 RCC_APB2PeriphClockCmd
Function Name
void RCC_APB2PeriphClockCmd ( uint32_t RCC_APB2Periph,
FunctionalState NewState)
Function Description
Enables or disables the High Speed APB (APB2) peripheral clock.
Parameters
 RCC_APB2Periph : specifies the APB2 peripheral to gates
its clock. This parameter can be any combination of the
following values:
 RCC_APB2Periph_SYSCFG :
 RCC_APB2Periph_SPI1 :
 RCC_APB2Periph_USART1 :
 RCC_APB2Periph_TIM15 :
 RCC_APB2Periph_TIM16 :
 RCC_APB2Periph_TIM17 :
 RCC_APB2Periph_TIM1 :
 RCC_APB2Periph_TIM8 :
 NewState : new state of the specified peripheral clock. This
parameter can be: ENABLE or DISABLE.
Return values
 None.
Notes
 After reset, the peripheral clock (used for registers read/write
access) is disabled and the application software has to enable
this clock before using it.