Texas Instruments Tiva TM4C123GH6PM, User Manual

Page: 210 / 352

System Control
Description:
Peripherals are enabled with this function. At power-up, all peripherals are disabled; they must
be enabled in order to operate or respond to register reads/writes.
The ui32Peripheral parameter must be only one of the follow-
ing values: SYSCTL_PERIPH_ADC0 , SYSCTL_PERIPH_ADC1 ,
SYSCTL_PERIPH_CAN0 , SYSCTL_PERIPH_CAN1 , SYSCTL_PERIPH_CAN2 ,
SYSCTL_PERIPH_COMP0 , SYSCTL_PERIPH_COMP1 , SYSCTL_PERIPH_COMP2 ,
SYSCTL_PERIPH_EEPROM0 , SYSCTL_PERIPH_GPIOA , SYSCTL_PERIPH_GPIOB ,
SYSCTL_PERIPH_GPIOC , SYSCTL_PERIPH_GPIOD , SYSCTL_PERIPH_GPIOE ,
SYSCTL_PERIPH_GPIOF
,
SYSCTL_PERIPH_HIBERNATE
,
SYSCTL_PERIPH_I2C0
,
SYSCTL_PERIPH_I2C1
,
SYSCTL_PERIPH_I2C2
,
SYSCTL_PERIPH_I2C3
,
SYSCTL_PERIPH_I2C4 , SYSCTL_PERIPH_I2C5 , SYSCTL_PERIPH_PWM0 ,
SYSCTL_PERIPH_PWM1 , SYSCTL_PERIPH_QEI0 , SYSCTL_PERIPH_QEI1 ,
SYSCTL_PERIPH_SSI0 , SYSCTL_PERIPH_SSI1 , SYSCTL_PERIPH_SSI2 ,
SYSCTL_PERIPH_SSI3 , SYSCTL_PERIPH_TIMER0 , SYSCTL_PERIPH_TIMER1 ,
SYSCTL_PERIPH_TIMER2 , SYSCTL_PERIPH_TIMER3 , SYSCTL_PERIPH_TIMER4 ,
SYSCTL_PERIPH_TIMER5 , SYSCTL_PERIPH_UART0 , SYSCTL_PERIPH_UART1 ,
SYSCTL_PERIPH_UART2 , SYSCTL_PERIPH_UART3 , SYSCTL_PERIPH_UART4 ,
SYSCTL_PERIPH_UART5 , SYSCTL_PERIPH_UART6 , SYSCTL_PERIPH_UART7 ,
SYSCTL_PERIPH_UDMA , SYSCTL_PERIPH_USB0 , SYSCTL_PERIPH_WDOG0 ,
SYSCTL_PERIPH_WDOG1 , SYSCTL_PERIPH_WTIMER0 , SYSCTL_PERIPH_WTIMER1 ,
SYSCTL_PERIPH_WTIMER2 , SYSCTL_PERIPH_WTIMER3 ,
SYSCTL_PERIPH_WTIMER4 , or SYSCTL_PERIPH_WTIMER5 .
Note:
It takes five clock cycles after the write to enable a peripheral before the the peripheral is
actually enabled. During this time, attempts to access the peripheral will result in a bus fault.
Care should be taken to ensure that the peripheral is not accessed during this brief time period.
Returns:
None.
18.2.1.19 ROM_SysCtlPeripheralPowerOff
Powers off a peripheral.
Prototype:
void
ROM_SysCtlPeripheralPowerOff(uint32_t ui32Peripheral)
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_SYSCTLTABLE
is an array of pointers located at
ROM_APITABLE[13]
.
ROM_SysCtlPeripheralPowerOff
is a function pointer located at
ROM_SYSCTLTABLE[37]
.
Parameters:
ui32Peripheral is the peripheral to be powered off.
Description:
This function allows the power to a peripheral to be turned off. The peripheral will continue
to receive power when its clock is enabled, but the power will be removed when its clock is
disabled.
210 April 8, 2013