/* ##################################    SysTick function  ###################################### */
/** 
\defgroup    SysTick_gr Systick Timer (SYSTICK)
\brief       Initialize and start the SysTick timer.
\details
    The System Tick Time (SysTick) generates interrupt requests on a regular basis.
    This allows an OS to carry out context switching to support multiple tasking. For applications
    that do not require an OS, the SysTick can be used for time keeping, time measurement, or as an 
    interrupt source for tasks that need to be executed regularly.
    

\section SysTick_code_ex_sec Code Example     
    The code below shows the usage of the function SysTick_Config() with an LPC1700.
    
\code
#include "LPC17xx.h"
  
volatile uint32_t msTicks = 0;                              /* Variable to store millisecond ticks */
  
void SysTick_Handler(void)  {                               /* SysTick interrupt Handler. */
  msTicks++;                                                /* See startup file startup_LPC17xx.s for SysTick vector */ 
}
  
int main (void)  {
  uint32_t returnCode;
  
  returnCode = SysTick_Config(SystemCoreClock / 1000);      /* Configure SysTick to generate an interrupt every millisecond */
  
  if (returnCode != 0)  {                                   /* Check return code for errors */
    // Error Handling 
  }
  
  while(1);
}
\endcode    
    
@{
*/


/**************************************************************************************************/
/** \brief  System Tick Timer Configuration
    \details
    Initialises and starts the System Tick Timer and its interrupt.
    After this call, the SysTick timer creates interrupts with the specified time interval. 
    Counter is in free running mode to generate periodical interrupts.   

    \param [in]  ticks  Number of ticks between two interrupts

    \returns          0  - success
    \returns          1  - failure
    
    \note
    When \ref __Vendor_SysTickConfig is defined to 1, the standard function <b>SysTick_Config</b>
    is excluded. In this case, the \ref device_h_pg must contain a vendor specific implementation
    of this function. 
*/
uint32_t SysTick_Config(uint32_t ticks);

/** @} */