/* Constructor */
MAX3421E::MAX3421E( void )
{
// initialize SPI pins
pinMode( SCK_PIN, OUTPUT );
pinMode( MISO_PIN, INPUT );
pinMode( MOSI_PIN, OUTPUT );
pinMode( SS_PIN, OUTPUT );
digitalWrite( SCK_PIN, HIGH );
digitalWrite( MOSI_PIN, HIGH );
digitalWrite( SS_PIN, HIGH );
// initialize pins
pinMode( INT_PIN, INPUT );
pinMode( GPX_PIN, INPUT );
pinMode( RST_PIN, OUTPUT );
setRST( HIGH );
if (SPI_SAUxEN == 0) {
#ifdef WORKAROUND_READ_MODIFY_WRITE
SBI2(SFR2_PER0, SFR2_BIT_SAUxEN); /* supply SAUx clock */
#else
SPI_SAUxEN = 1U; /* supply SAUx clock */
#endif
NOP();
NOP();
NOP();
NOP();
SPI_SPSx = 0x0001U;
}
#ifdef WORKAROUND_READ_MODIFY_WRITE
SPI_STx |= SPI_CHx; /* disable CSIxx */
CBI(SFR_IFxx, SFR_BIT_CSIIFxx); /* clear INTCSIxx interrupt flag */
SBI(SFR_MKxx, SFR_BIT_CSIMKxx); /* disable INTCSIxx interrupt */
CBI(SFR_PR1xx, SFR_BIT_CSIPR1xx); /* set INTCSIxx high priority */
CBI(SFR_PR0xx, SFR_BIT_CSIPR0xx);
#else
SPI_STx |= SPI_CHx; /* disable CSIxx */
SPI_CSIIFxx = 0U; /* clear INTCSIxx interrupt flag */
SPI_CSIMKxx = 1U; /* disable INTCSIxx interrupt */
SPI_CSIPR1xx = 0U; /* set INTCSIxx high priority */
SPI_CSIPR0xx = 0U;
#endif
SPI_SIRxx = 0x0007U; /* clear error flag */
SPI_SMRxx = 0x0020U;
SPI_SCRxx = 0xF007U;
SPI_SDRxx = 0x0200U;
SPI_SOx |= SPI_CHx << 8; /* CSIxx clock initial level */
SPI_SOx &= ~SPI_CHx; /* CSIxx SO initial level */
SPI_SOEx |= SPI_CHx; /* enable CSIxx output */
SPI_SSx |= SPI_CHx; /* enable CSIxx */
}
void SPIClass::begin() {
pinMode(SCK, OUTPUT);
pinMode(MISO, INPUT_PULLUP);
pinMode(MOSI, OUTPUT);
pinMode(SS, OUTPUT);
digitalWrite(SCK, HIGH);
digitalWrite(MOSI, HIGH);
digitalWrite(SS, HIGH);
if (SPI_SAUxEN == 0) {
#ifdef WORKAROUND_READ_MODIFY_WRITE
SBI2(SFR2_PER0, SFR2_BIT_SAUxEN); // クロック供給開始
#else
SPI_SAUxEN = 1; // クロック供給開始
#endif
NOP();
NOP();
NOP();
NOP();
SPI_SPSx = 0x0001; // 動作クロック設定
}
#ifdef WORKAROUND_READ_MODIFY_WRITE
SPI_STx |= SPI_CHx; // シリアル通信停止
SBI(SFR_MKxx, SFR_BIT_CSIMKxx); // 割り込み処理禁止
CBI(SFR_IFxx, SFR_BIT_CSIIFxx); // 割り込み要求フラグをクリア
CBI(SFR_PR1xx, SFR_BIT_CSIPR1xx); // 割り込み優先順位の設定
CBI(SFR_PR0xx, SFR_BIT_CSIPR0xx);
#else
SPI_STx |= SPI_CHx; // シリアル通信停止
SPI_CSIMKxx = 1; // 割り込み処理禁止
SPI_CSIIFxx = 0; // 割り込み要求フラグをクリア
SPI_CSIPR1xx = 0; // 割り込み優先順位の設定
SPI_CSIPR0xx = 0;
#endif
SPI_SIRxx = 0x0007; // エラーフラグをクリア
SPI_SMRxx = 0x0020; // モード設定
SPI_SCRxx = 0xF007; // シリアル通信動作設定
SPI_SDRxx = SPI_CLOCK_DIV4 << 9; // 動作クロックの分周設定
start();
}
static void initISR(timer16_Sequence_t timer)
{
if( timer == _timer1){
if( SRV_TAUxEN == 0 ){
#ifdef WORKAROUND_READ_MODIFY_WRITE
SBI2( SRV_SFR2_PERx, SRV_SFR2_BIT_TAUxEN ); /* supplies input clock */
#else
SRV_TAUxEN = 1U; /* supplies input clock */
#endif
SRV_TPSx = TIMER_CLOCK;
}
#ifdef WORKAROUND_READ_MODIFY_WRITE
/* Set INTTM04 low priority */
SBI( SRV_SFR_PR1xx, SRV_SFR_BIT_TMPR1xx );
SBI( SRV_SFR_PR0xx, SRV_SFR_BIT_TMPR0xx );
/* Mask channel 04 interrupt */
CBI( SRV_SFR_MKxx, SRV_SFR_BIT_TMMKxx ); /* enable INTTM04 interrupt */
CBI( SRV_SFR_IFxx, SRV_SFR_BIT_TMIFxx ); /* clear INTTM04 interrupt flag */
#else
/* Set INTTM04 low priority */
SRV_TMPR1xx = 1U;
SRV_TMPR0xx = 1U;
/* Mask channel 04 interrupt */
SRV_TMMKxx = 0U; /* enable INTTM04 interrupt */
SRV_TMIFxx = 0U; /* clear INTTM04 interrupt flag */
#endif
/* Channel 0 used as interval timer */
SRV_TMRxx = 0x8000U;
SRV_TDRxx = (unsigned int)usToTicks(REFRESH_INTERVAL);
SRV_TSx |= SRV_CHx; /* operation is enabled (start trigger is generated) */
delay(1);
Channel[timer] = -1;
handle_interrupts(_timer1); /* TDR0x setting */
}
}