uint16_t divisor_sum( uint16_t n )
{
uint16_t s = 0 ;
uint16_t i;
for( i = 1; i <= n/2 ; ++ i )
{
if( is_divisor( n, i ) == 1)
{
s += i;
}
}
return s ;
}
/**
* @brief Gets the brp and tsegbitsize in order to achieve the desired bitwidth.
* @details The following must be fullfilled:
*(brp + CAN_BRP_EXTRA_BIT) * (tsegbitsize + CAN_TSEG_EXTRA_BITS) == bitwidth
*
* @param bitwidth The bitwidth that we need to achieve.
* @param brp Here it returns the calculated brp value.
* @param tsegbitsize Here it returns the calculated tseg bit size value.
* @return true if brp and tsegbitsize have been calculated.
*/
static inline bool get_brp_and_bitsize(
const uint32_t bitwidth,
uint16_t *const brp,
uint32_t *const tsegbitsize
)
{
bool hit = false;
while ( ( !hit ) && ( *brp < bitwidth / MIN_NUMBER_OF_CAN_BITS ) ) {
if ( ( is_divisor( bitwidth, *brp + CAN_BRP_EXTRA_BIT ) )
&& ( get_tseg_bit_size( bitwidth, *brp ) < MAX_TSEG1_TSEG2_BITS ) ) {
hit = true;
*tsegbitsize = get_tseg_bit_size( bitwidth, *brp );
} else { /*Correct values not found, keep looking*/
( *brp )++;
}
}
return hit;
}