스마트 컨트롤러

20150814

2015 스마트 콘트롤러/업무일지 2015. 8. 17. 00:24

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ARM

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<ARM>

=DBGU INTERRUPT RX 구현

:EXTERNAL INTERRUPT

<DBGU.C>

#include "dbgu.h"

unsigned char DBGU_Rx(void)
{
  while(0 == (*AT91C_DBGU_CSR & AT91C_US_RXRDY));
  return *AT91C_DBGU_RHR;
}

void DBGU_Tx(char cData)
{
  while(0 == (*AT91C_DBGU_CSR & AT91C_US_TXRDY));
  *AT91C_DBGU_THR = cData;
  return;
}

void DBGU_Str(char * cpStr)
{
  while(0 != *cpStr)
  {
    DBGU_Tx(*cpStr);
    ++cpStr;
  }
  return;
}

void DBGU_Menu(void)
{
  DBGU_Str("1. LCD Print\n\r");
  DBGU_Str("M. MENU Print\n\r");
  return;
}

void DBGU_Rx_ISR(void)
{
  switch ((*AT91C_DBGU_RHR)&0x000000FF)// 1byte 추출
  {
    case 'M':
    case 'm':
      DBGU_Menu();
      break;
    default :
      DBGU_Str("Wrong Command\n\r");
      DBGU_Menu();
      break;
  }
  return;
}

void DBGU_Init_ISR(void)  // Interrupt
{
  *AT91C_PIOA_ASR = AT91C_PA9_DRXD | AT91C_PA10_DTXD;  // Peripheral A setting
  *AT91C_PIOA_PDR = AT91C_PA9_DRXD | AT91C_PA10_DTXD;  // PIO Disable
  *AT91C_DBGU_CR = AT91C_US_RSTRX | AT91C_US_RSTTX;    // Reset & Disable -ref) p224
  *AT91C_DBGU_MR = AT91C_US_PAR_EVEN | AT91C_US_CHMODE_NORMAL;  // Parity:EVEN /CHmode: Normal
  *AT91C_DBGU_BRGR = DBGU_CD;              // Baud Rate setting
  *AT91C_AIC_IDCR = 1 << AT91C_ID_SYS;
  AT91C_AIC_SVR[AT91C_ID_SYS] = (unsigned int)DBGU_Rx_ISR;  // 핸들러 등록
                              // 동작모드 및 우선순위 결정 -ref) p176
  AT91C_AIC_SMR[AT91C_ID_SYS] = AT91C_AIC_SRCTYPE_POSITIVE_EDGE | AT91C_AIC_PRIOR_LOWEST;
  *AT91C_AIC_ICCR = 1 << AT91C_ID_SYS;  // 커맨드 레지스터 클리어
  //*AT91C_AIC_ISCR = 1 << AT91C_ID_PIOA;  // 커맨드 레지스터 셋
  *AT91C_DBGU_IER = AT91C_US_RXRDY;
  *AT91C_AIC_IECR = 1 << AT91C_ID_SYS;
  *AT91C_DBGU_CR = AT91C_US_RXEN | AT91C_US_TXEN;    // Enable

  //AT91C_US_RXDIS | AT91C_US_TXDIS;  // Disable
  return;
}

void DBGU_Init_Polling(void)  // Polling
{
  *AT91C_PIOA_ASR = AT91C_PA9_DRXD | AT91C_PA10_DTXD;  // Peripheral A setting
  *AT91C_PIOA_PDR = AT91C_PA9_DRXD | AT91C_PA10_DTXD;  // PIO Disable
  *AT91C_DBGU_CR = AT91C_US_RSTRX | AT91C_US_RSTTX;    // Reset & Disable
  *AT91C_DBGU_MR = AT91C_US_PAR_EVEN | AT91C_US_CHMODE_NORMAL ;  // Parity:EVEN /CHmode: Normal
  *AT91C_DBGU_BRGR = DBGU_CD;              // Baud Rate setting
  *AT91C_DBGU_CR = AT91C_US_RXEN | AT91C_US_TXEN;    // Enable

  //AT91C_US_RXDIS | AT91C_US_TXDIS;  // Disable
  return;
}

void DBGU_Init(void)
{
  //DBGU_Init_Polling();
  DBGU_Init_ISR();
  return;
}