/**************************************************************************//**
* @brief Get status of PB1,...,PB4 buttons and the AEM state
* @return Bitmap button status, AEM state in bit position EXIT_LOOP
*****************************************************************************/
static uint32_t readButtons( void )
{
if ( BSP_RegisterRead(&BC_REGISTER->UIF_AEM) == BC_UIF_AEM_BC )
return EXIT_LOOP | BSP_PushButtonsGet();
return BSP_PushButtonsGet();
}
/**************************************************************************//**
* @brief GPIO Interrupt handler
* This interrupt handler is not an example of good design, as it will do
* a lot of operations inside the interrupt handler.
*****************************************************************************/
void GPIO_EVEN_IRQHandler(void)
{
uint16_t joystick;
uint16_t pb;
/* Clear interrupt */
BSP_InterruptFlagsClear(BC_INTEN_JOYSTICK);
BSP_InterruptFlagsClear(BC_INTEN_PB);
GPIO_IntClear(1 << GPIO_INT_PIN);
/* LEDs on to indicate joystick used */
BSP_LedsSet(0xffff);
/* Read and store joystick activity - wait for key release */
joystick = BSP_JoystickGet();
while (BSP_JoystickGet()) ;
/* Read and store pushbutton activity - wait for key release */
pb = BSP_PushButtonsGet();
while (BSP_PushButtonsGet()) ;
/* LEDs off to indicate joystick release */
BSP_LedsSet(0x0000);
/* Up increases data to store in EEPROM */
if (joystick & BC_UIF_JOYSTICK_UP)
{
eepromData++;
}
/* Down decreases data to store in EEPROM */
if (joystick & BC_UIF_JOYSTICK_DOWN)
{
eepromData--;
}
/* Reset modified data to factory default */
if (pb & BC_UIF_PB4)
{
eepromReset = true;
}
}
/**************************************************************************//**
* @brief Initialize GPIO interrupt on PC14
*****************************************************************************/
void GPIO_EVEN_IRQHandler(void)
{
uint16_t flags, joystick, pb;
/* Clear interrupt */
flags = BSP_InterruptFlagsGet();
BSP_InterruptFlagsClear(flags);
/* Clear GPIO interrupt */
GPIO_IntClear(1 << GPIO_INT_PIN);
/* Move selection */
if(flags & BC_INTEN_JOYSTICK)
{
/* Read joystick status */
joystick = BSP_JoystickGet();
/* Move selection around */
if(joystick == BC_UIF_JOYSTICK_UP)
{
if(eModeDemo>0) eModeDemo=eModeDemo-1;
}
if(joystick == BC_UIF_JOYSTICK_DOWN)
{
if(eModeDemo<8) eModeDemo=eModeDemo+1;
}
}
/* Activate demo */
if(flags & BC_INTEN_PB)
{
pb = BSP_PushButtonsGet();
if(pb == BC_UIF_PB1)
{
runDemo = true;
}
/* Wait until key is released */
while(BSP_PushButtonsGet()!=0) ;
}
}
int main(void)
{
DMA_Init_TypeDef dmaInit;
TIMER_Init_TypeDef timerInit = TIMER_INIT_DEFAULT;
uint32_t leds;
static uint16_t last_buttons = 0;
uint16_t buttons;
/* Initialize DK board register access */
BSP_Init(BSP_INIT_DEFAULT);
/* If first word of user data page is non-zero, enable eA Profiler trace */
BSP_TraceProfilerSetup();
volume = 7;
preampAdjustFactor = preampVolume[ volume ];
BSP_LedsSet((uint16_t)(0x00003FFF << (15 - volume)));
/* Connect audio in/out to ADC/DAC */
BSP_PeripheralAccess(BSP_AUDIO_IN, true);
BSP_PeripheralAccess(BSP_AUDIO_OUT, true);
/* Wait a while in order to let signal from audio-in stabilize after */
/* enabling audio-in peripheral. */
RTCDRV_Trigger(1000, NULL);
EMU_EnterEM2(true);
/* Current example gets by at 14MHz core clock (also with low level of compiler */
/* optimization). That may however change if modified, consider changing to */
/* higher HFRCO band or HFXO. */
/*
* Use for instance one of below statements to increase core clock.
* CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFXO);
* CMU_HFRCOBandSet(cmuHFRCOBand_28MHz);
*/
/* Enable clocks required */
CMU_ClockEnable(cmuClock_HFPER, true);
CMU_ClockEnable(cmuClock_ADC0, true);
CMU_ClockEnable(cmuClock_DAC0, true);
CMU_ClockEnable(cmuClock_PRS, true);
CMU_ClockEnable(cmuClock_DMA, true);
CMU_ClockEnable(cmuClock_TIMER0, true);
/* Ensure DMA interrupt at higher priority than PendSV. */
/* (PendSV used to process sampled audio). */
NVIC_SetPriority(DMA_IRQn, 0); /* Highest priority */
NVIC_SetPriority(PendSV_IRQn, (1 << __NVIC_PRIO_BITS) - 1); /* Lowest priority */
/* Configure peripheral reflex system used by TIMER to trigger ADC/DAC */
preampPRSConfig(PREAMP_PRS_CHANNEL);
/* Configure general DMA issues */
dmaInit.hprot = 0;
dmaInit.controlBlock = dmaControlBlock;
DMA_Init(&dmaInit);
/* Configure DAC used for audio-out */
preampDACConfig();
/* Configure ADC used for audio-in */
preampADCConfig();
/* Trigger sampling according to configured sample rate */
TIMER_TopSet(TIMER0, CMU_ClockFreqGet(cmuClock_HFPER) / PREAMP_AUDIO_SAMPLE_RATE);
TIMER_Init(TIMER0, &timerInit);
/* Main loop, only responsible for checking volume */
while (1)
{
/* Triggered to check volume setting? */
if (preampCheckVolume)
{
preampCheckVolume = false;
/* Calculate new output volume. */
buttons = BSP_PushButtonsGet() & PB_MASK; /* Check pushbuttons */
if (buttons != last_buttons)
{
if (buttons & BC_UIF_PB2) /* Increase volume */
{
if (volume < VOLUME_MAX)
volume++;
}
else if (buttons & BC_UIF_PB1) /* Decrease volume */
{
if (volume)
volume--;
}
preampAdjustFactor = preampVolume[ volume ];
last_buttons = buttons;
}
/* Use 14 leftmost leds for volume control indication. Rightmost led is */
/* used to indicate clipping of audio out signal. */
leds = 0x00003FFF << (15 - volume);
/* Audio out clipped? */
if (preampAudioOutClipped)
{
preampAudioOutClipped = false;
leds |= 0x0001;
}
BSP_LedsSet((uint16_t) leds);
}
EMU_EnterEM1();
}
}
/**************************************************************************//**
* @brief Main function
*****************************************************************************/
int main(void)
{
#ifdef GG_STK
uint32_t mode = 0;
#else
/* Initialize DK board register access, necessary if run on DK */
BSP_Init(BSP_INIT_DEFAULT);
BSP_PeripheralAccess(BSP_AUDIO_OUT, true);
#endif
/* Initialize peripherals */
initClock();
initDma();
initDac();
initDacDma();
initTimer();
#ifdef GG_STK
initGpio();
#endif
while(1)
{
/*** Operation for EFM32GG-DK3750 ***/
#ifndef GG_STK
/* Wait key press */
while(!BSP_PushButtonsGet())
;
if (BSP_PushButtonsGet() == BC_UIF_PB1)
{
BSP_LedsSet(0x0001);
/* Wait key release */
while(BSP_PushButtonsGet()!=0);
/* Start play files */
playList[0].frameStart = (char *)voice8k;
playList[1].frameStart = NULL;
playList[0].frameNum = sizeof(voice8k)/FRAME_SIZE_8K;
speexPlayBack(0, NARROWBAND, FRAME_SIZE_8K, &playList[0]);
BSP_LedsSet(0x0000);
}
if (BSP_PushButtonsGet() == BC_UIF_PB2)
{
BSP_LedsSet(0x0002);
/* Wait key release */
while(BSP_PushButtonsGet()!=0);
/* Start play files */
playList[0].frameStart = (char *)voice11k;
playList[1].frameStart = NULL;
playList[0].frameNum = sizeof(voice11k)/FRAME_SIZE_11K;
speexPlayBack(0, NARROWBAND, FRAME_SIZE_11K, &playList[0]);
BSP_LedsSet(0x0000);
}
if (BSP_PushButtonsGet() == BC_UIF_PB3)
{
BSP_LedsSet(0x0004);
/* Wait key release */
while(BSP_PushButtonsGet()!=0);
/* Start play files */
playList[0].frameStart = (char *)voice15k;
playList[1].frameStart = NULL;
playList[0].frameNum = sizeof(voice15k)/FRAME_SIZE_15K;
speexPlayBack(0, NARROWBAND, FRAME_SIZE_15K, &playList[0]);
BSP_LedsSet(0x0000);
}
if (BSP_PushButtonsGet() == BC_UIF_PB4)
{
BSP_LedsSet(0x0008);
/* Wait key release */
while(BSP_PushButtonsGet()!=0);
/* Start play files */
playList[0].frameStart = (char *)voice18k2;
playList[1].frameStart = NULL;
playList[0].frameNum = sizeof(voice18k2)/FRAME_SIZE_18K2;
speexPlayBack(0, NARROWBAND, FRAME_SIZE_18K2, &playList[0]);
BSP_LedsSet(0x0000);
}
/*** Operation for EFM32GG-STK3750 ***/
#else
/* Wait key press */
EMU_EnterEM1();
switch (keyCheck())
{
case 1:
mode++;
if (mode == 4)
{
mode = 0;
}
GPIO_PortOutSetVal(gpioPortE, (mode << 2), 0x000c);
break;
case 2:
if (mode == 0x00)
{
/* Start play files */
playList[0].frameStart = (char *)voice8k;
playList[1].frameStart = NULL;
playList[0].frameNum = sizeof(voice8k)/FRAME_SIZE_8K;
speexPlayBack(0, NARROWBAND, FRAME_SIZE_8K, &playList[0]);
}
else if (mode == 0x01)
{
/* Start play files */
playList[0].frameStart = (char *)voice11k;
playList[1].frameStart = NULL;
playList[0].frameNum = sizeof(voice11k)/FRAME_SIZE_11K;
speexPlayBack(0, NARROWBAND, FRAME_SIZE_11K, &playList[0]);
}
else if (mode == 0x02)
{
/* Start play files */
playList[0].frameStart = (char *)voice15k;
playList[1].frameStart = NULL;
playList[0].frameNum = sizeof(voice15k)/FRAME_SIZE_15K;
speexPlayBack(0, NARROWBAND, FRAME_SIZE_15K, &playList[0]);
}
else
{
/* Start play files */
playList[0].frameStart = (char *)voice18k2;
playList[1].frameStart = NULL;
playList[0].frameNum = sizeof(voice18k2)/FRAME_SIZE_18K2;
speexPlayBack(0, NARROWBAND, FRAME_SIZE_18K2, &playList[0]);
}
break;
default:
break;
}
#endif
}
}
