/**
* This function will initial LM3S board.
*/
void rt_hw_board_init()
{
//
// Enable lazy stacking for interrupt handlers. This allows floating-point
// instructions to be used within interrupt handlers, but at the expense of
// extra stack usage.
//
FPULazyStackingEnable();
// set sysclock to 80M
SysCtlClockSet(SYSCTL_SYSDIV_2_5 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ);
/* init systick */
SysTickDisable();
SysTickPeriodSet(SysCtlClockGet()/RT_TICK_PER_SECOND);
SysTickIntEnable();
SysTickEnable();
/* enable ssio */
//SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI0);
#if LM3S_EXT_SRAM == 1
/* init SDRAM */
rt_hw_sdram_init();
#endif
/* init console */
rt_hw_console_init();
/* enable interrupt */
IntMasterEnable();
}
/*
*********************************************************************************************************
* void SysTickInit(void)
* Description: This function is to init the systick.
*
* Argument(s) : none
* Return(s) : none
*
* Note(s) : none.
*********************************************************************************************************
*/
_BSP_EVK_V10_BSP_INIT_
void SysTickInit(void)
{
SysTickDisable();
SysTickClkSourceSet(NVIC_SYSTICKCTRL_CLKIN);
SysTickPeriodSet(10);
SysTickEnable();
}
void SystickIntHandler(){
//Samples the voltage on pin 3
if (GPIOPinRead(GPIOA1_BASE, 0x10)){
//modify the bitsequence using logic AND
//Use bitwise operation here to save memory. Another option is to use an aray
bitsequence = bitsequence | (1LL << (64-index));
}
//Increments the next index of the bit in bitsequence to be modified
index++;
//Clear the GPIO interrupt
GPIOIntClear(GPIOA1_BASE, 0x10);
//Enables the GPIO interrupt
GPIOIntEnable(GPIOA1_BASE, 0x10);
if(index == 60)
{
//If 60 bits have been written, it's time to check what number on the remote the bit sequence reprensent.
SysTickDisable();
GPIOIntDisable(GPIOA1_BASE, 0x10);
}
}
/************************************************************************************//**
** \brief Stops and disables the timer.
** \return none.
**
****************************************************************************************/
void TimeDeinit(void)
{
SysTickIntDisable();
SysTickDisable();
} /*** end of TimeDeinit ***/
void SysTick::stop(void)
{
SysTickDisable();
}
/**
* stop timer
*/
void Timer::stop()
{
SysTickDisable();
}
