ARM, RISC-V контроллеры

//PA8-SCK,PA9-SDT,PA10-SEL
#define patternOneSet  (bit8SetBSHR|bit9SetBSHR|bit10ResetBSHR) 
#define patternOneFix  (bit8ResetBSHR|bit9SetBSHR|bit10ResetBSHR) 
#define patternZeroSet (bit8SetBSHR|bit9ResetBSHR|bit10ResetBSHR) 
#define patternZeroFix (bit8ResetBSHR|bit9ResetBSHR|bit10ResetBSHR) 
#define patternOff     (bit8ResetBSHR|bit9ResetBSHR|bit10SetBSHR) 

...

void sendFIRtoDAC(uint16_t FIRdata) 
{
 int i; uint16_t mask;
 mask=0x8000;
 for(i=0;i<8;i++) 
 {
     GPIOA->BSHR=patternZeroSet;
     GPIOA->BSHR=patternZeroFix; 
 }
 for(i=0;i<16;i++) 
 {
     if((FIRdata&mask)!=0)
     {
         GPIOA->BSHR=patternOneSet;
         GPIOA->BSHR=patternOneFix;
     }
     else
     {
         GPIOA->BSHR=patternZeroSet; 
         GPIOA->BSHR=patternZeroFix;
     }
     mask=mask>>1;
 }
 GPIOA->BSHR=patternOff; 
}