void play_song(int* notebuf, int* accidentalsbuf, int* octavebuf, int length) {
PWM_1_Start();
PWM_2_Start();
PWM_3_Start();
PWM_4_Start();
for (int i = 0; i < length; i+=4) {
PWM_1_WriteCompare((note_lengths[note_lookup[notebuf[i]]+accidentalsbuf[i]]/2)>>octavebuf[i]);
PWM_1_WritePeriod(note_lengths[note_lookup[notebuf[i]]+accidentalsbuf[i]]>>octavebuf[i]);
PWM_1_WriteCounter(0);
PWM_2_WriteCompare((note_lengths[note_lookup[notebuf[i+1]]+accidentalsbuf[i]]/2)>>octavebuf[i+1]);
PWM_2_WritePeriod(note_lengths[note_lookup[notebuf[i+1]]+accidentalsbuf[i]]>>octavebuf[i+1]);
PWM_2_WriteCounter(0);
PWM_3_WriteCompare((note_lengths[note_lookup[notebuf[i+2]]+accidentalsbuf[i]]/2)>>octavebuf[i+2]);
PWM_3_WritePeriod(note_lengths[note_lookup[notebuf[i+2]]+accidentalsbuf[i]]>>octavebuf[i+2]);
PWM_3_WriteCounter(0);
PWM_4_WriteCompare((note_lengths[note_lookup[notebuf[i+3]]+accidentalsbuf[i]]/2)>>octavebuf[i+3]);
PWM_4_WritePeriod(note_lengths[note_lookup[notebuf[i+3]]+accidentalsbuf[i]]>>octavebuf[i+3]);
PWM_4_WriteCounter(0);
if (Keypad_1_Status_Reg_Read() & 0x10) break;
CyDelay(TEMPO_MS);
}
PWM_1_Stop();
PWM_2_Stop();
PWM_3_Stop();
PWM_4_Stop();
}
/*******************************************************************************
* Function Name: PWM_3_Init
********************************************************************************
*
* Summary:
* Initialize component's parameters to the parameters set by user in the
* customizer of the component placed onto schematic. Usually called in
* PWM_3_Start().
*
* Parameters:
* None
*
* Return:
* None
*
*******************************************************************************/
void PWM_3_Init(void)
{
#if (PWM_3_UsingFixedFunction || PWM_3_UseControl)
uint8 ctrl;
#endif /* (PWM_3_UsingFixedFunction || PWM_3_UseControl) */
#if(!PWM_3_UsingFixedFunction)
#if(PWM_3_UseStatus)
/* Interrupt State Backup for Critical Region*/
uint8 PWM_3_interruptState;
#endif /* (PWM_3_UseStatus) */
#endif /* (!PWM_3_UsingFixedFunction) */
#if (PWM_3_UsingFixedFunction)
/* You are allowed to write the compare value (FF only) */
PWM_3_CONTROL |= PWM_3_CFG0_MODE;
#if (PWM_3_DeadBand2_4)
PWM_3_CONTROL |= PWM_3_CFG0_DB;
#endif /* (PWM_3_DeadBand2_4) */
ctrl = PWM_3_CONTROL3 & ((uint8 )(~PWM_3_CTRL_CMPMODE1_MASK));
PWM_3_CONTROL3 = ctrl | PWM_3_DEFAULT_COMPARE1_MODE;
/* Clear and Set SYNCTC and SYNCCMP bits of RT1 register */
PWM_3_RT1 &= ((uint8)(~PWM_3_RT1_MASK));
PWM_3_RT1 |= PWM_3_SYNC;
/*Enable DSI Sync all all inputs of the PWM*/
PWM_3_RT1 &= ((uint8)(~PWM_3_SYNCDSI_MASK));
PWM_3_RT1 |= PWM_3_SYNCDSI_EN;
#elif (PWM_3_UseControl)
/* Set the default compare mode defined in the parameter */
ctrl = PWM_3_CONTROL & ((uint8)(~PWM_3_CTRL_CMPMODE2_MASK)) &
((uint8)(~PWM_3_CTRL_CMPMODE1_MASK));
PWM_3_CONTROL = ctrl | PWM_3_DEFAULT_COMPARE2_MODE |
PWM_3_DEFAULT_COMPARE1_MODE;
#endif /* (PWM_3_UsingFixedFunction) */
#if (!PWM_3_UsingFixedFunction)
#if (PWM_3_Resolution == 8)
/* Set FIFO 0 to 1 byte register for period*/
PWM_3_AUX_CONTROLDP0 |= (PWM_3_AUX_CTRL_FIFO0_CLR);
#else /* (PWM_3_Resolution == 16)*/
/* Set FIFO 0 to 1 byte register for period */
PWM_3_AUX_CONTROLDP0 |= (PWM_3_AUX_CTRL_FIFO0_CLR);
PWM_3_AUX_CONTROLDP1 |= (PWM_3_AUX_CTRL_FIFO0_CLR);
#endif /* (PWM_3_Resolution == 8) */
PWM_3_WriteCounter(PWM_3_INIT_PERIOD_VALUE);
#endif /* (!PWM_3_UsingFixedFunction) */
PWM_3_WritePeriod(PWM_3_INIT_PERIOD_VALUE);
#if (PWM_3_UseOneCompareMode)
PWM_3_WriteCompare(PWM_3_INIT_COMPARE_VALUE1);
#else
PWM_3_WriteCompare1(PWM_3_INIT_COMPARE_VALUE1);
PWM_3_WriteCompare2(PWM_3_INIT_COMPARE_VALUE2);
#endif /* (PWM_3_UseOneCompareMode) */
#if (PWM_3_KillModeMinTime)
PWM_3_WriteKillTime(PWM_3_MinimumKillTime);
#endif /* (PWM_3_KillModeMinTime) */
#if (PWM_3_DeadBandUsed)
PWM_3_WriteDeadTime(PWM_3_INIT_DEAD_TIME);
#endif /* (PWM_3_DeadBandUsed) */
#if (PWM_3_UseStatus || PWM_3_UsingFixedFunction)
PWM_3_SetInterruptMode(PWM_3_INIT_INTERRUPTS_MODE);
#endif /* (PWM_3_UseStatus || PWM_3_UsingFixedFunction) */
#if (PWM_3_UsingFixedFunction)
/* Globally Enable the Fixed Function Block chosen */
PWM_3_GLOBAL_ENABLE |= PWM_3_BLOCK_EN_MASK;
/* Set the Interrupt source to come from the status register */
PWM_3_CONTROL2 |= PWM_3_CTRL2_IRQ_SEL;
#else
#if(PWM_3_UseStatus)
/* CyEnterCriticalRegion and CyExitCriticalRegion are used to mark following region critical*/
/* Enter Critical Region*/
PWM_3_interruptState = CyEnterCriticalSection();
/* Use the interrupt output of the status register for IRQ output */
PWM_3_STATUS_AUX_CTRL |= PWM_3_STATUS_ACTL_INT_EN_MASK;
/* Exit Critical Region*/
CyExitCriticalSection(PWM_3_interruptState);
/* Clear the FIFO to enable the PWM_3_STATUS_FIFOFULL
bit to be set on FIFO full. */
PWM_3_ClearFIFO();
#endif /* (PWM_3_UseStatus) */
#endif /* (PWM_3_UsingFixedFunction) */
}
