void SSI3DMASlaveClass::begin() {
ROM_SysCtlPeripheralClockGating(true);
configureSSI3();
configureDMA();
configureCSInterrupt();
}
//-----------------------------------
// Start/Stop/configure this singleton
//-----------------------------------
void METH(setParameter)(void * bufferTx, t_uint16 bufferSizeInSample, t_uint16 nbMspChannelEnabled,
t_uint16 target) {
mNbMspChannelEnabled = nbMspChannelEnabled;
// MAINTAIN BOTH COUNTERS ALIGNED !
param_buffer_tx = getLogicalParameterPtr(getLogicalChannel(MSP_AB8500_TX, MSP_TX));
mTxBuffer = bufferTx;
mTxBufferSize = 48 * nbMspChannelEnabled;
mTxBufferArmAddr = getArmPhysicalAddr(mTxBuffer);
load_prcmu_pointers(target);
mTarget = target;
configureMspRegs(STOPPED);
resetDefaultTxBuffer();
// Configure DMA common stuff
configureDMA();
mIsConfigured = 1;
}
void start_DMA_MSP(t_uint16 samplerate){
if(mStartCount) {
return;
}
mStartCount++;
//resetMSP(MSP0); // reset shoud NOT be called EVER
mspReg->WMRK = 0x9;
// Init Rx
mspReg->IMSC |= 0x2; // mask for msp overrun IT
mspReg->RCF = 0x2007; // 1 elements of 32 bits, RDDLY=1 MSB first
mspReg->DMACR |= 0x1;
mspReg->MCR |= 0x1;
mspReg->RCE0 = 0x3;
mspReg->GCR |= 0x202UL; // enable fifos
// Init Tx
mspReg->IMSC |= 0x20UL; // mask for msp underrun IT
mspReg->TCF = 0x0000007; // 1 elements of 32 bits, TDDLY=1 MSB first
mspReg->DMACR |= 0x2UL;
mspReg->MCR |= 0x20UL;
mspReg->TCE0 = 0x3UL;
//mspReg->IODLY |= 0x00020UL; // works with or without
mspReg->GCR |= 0x155A50UL; // this is mandatory
if (samplerate == 8000)
mspReg->SRG |= 0x1F004A; // internal bitclk = 19.2MHz/75 = 256 KHz (needed 256 KHZ = 2x16x8KHz), width = 1 bclk,frame periode = 32 bclk
else
mspReg->SRG = 0x27001D; // SCKDIV=30, width = 1 bclk,frame periode = 40 bclk. internal bitclk = 19.2MHz/30/40 = 16 KHz
// Remap Msp0 Tc interrupt
// Async_IT[1] = mmdsp_IT[17] = MSP0_RX_TC
// Async_IT[11] = mmdsp_IT[37] = MSP0_TX_TC
ITREMAP_interf_reg28 = 37;
ITREMAP_interf_reg26 = 17;
ITREMAP_interf_reg17 = 26;
configureDMA();
AUDIO_UNMASK_IT(30);
}
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32l1xx_md.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32l1xx.c file
*/
/* Configure Clocks for Application need */
RCC_Configuration();
/* Configure RTC Clocks */
RTC_Configuration();
/* Set internal voltage regulator to 1.8V */
PWR_VoltageScalingConfig(PWR_VoltageScaling_Range1);
/* Wait Until the Voltage Regulator is ready */
while (PWR_GetFlagStatus(PWR_FLAG_VOS) != RESET) ;
/* Enable debug features in low power modes (Sleep, STOP and STANDBY) */
#ifdef DEBUG_SWD_PIN
DBGMCU_Config(DBGMCU_SLEEP | DBGMCU_STOP | DBGMCU_STANDBY, ENABLE);
#endif
/* Configure SysTick IRQ and SysTick Timer to generate interrupts */
RCC_GetClocksFreq(&RCC_Clocks);
SysTick_Config(RCC_Clocks.HCLK_Frequency / 500);
/* Init I/O ports */
Init_GPIOs();
/* Initializes the LCD glass */
LCD_GLASS_Configure_GPIO();
LCD_GLASS_Init();
/* Display Welcome message */
LCD_GLASS_ScrollSentence(" ** TEMPERATURE SENSOR EXAMPLE ** ",1,SCROLL_SPEED);
/* Disable SysTick IRQ and SysTick Timer */
SysTick->CTRL &= ~ ( SysTick_CTRL_TICKINT_Msk | SysTick_CTRL_ENABLE_Msk );
/* Test user or factory temperature sensor calibration value */
if ( testFactoryCalibData() == SUCCESS ) getFactoryTSCalibData(&calibdata);
else if ( testUserCalibData() == SUCCESS ) calibdata = *USER_CALIB_DATA;
else {
/* User calibration or factory calibration TS data are not available */
calibdata.TS_CAL_1 = DEFAULT_COLD_VAL;
calibdata.TS_CAL_2 = DEFAULT_HOT_VAL;
writeCalibData(&calibdata);
calibdata = *USER_CALIB_DATA;
}
/* Configure Wakeup from sleep using RTC event*/
configureWakeup();
/* Configure direct memory access for ADC usage*/
configureDMA();
/* Configure ADC for temperature sensor value conversion */
configureADC_Temp();
while(1) {
/* Re-enable DMA and ADC conf and start Temperature Data acquisition */
acquireTemperatureData();
/* Stay in SLEEP mode untill the data are acquired by ADC */
__WFI();
/* for DEBUG purpose uncomment the following line and comment the __WFI call to do not enter STOP mode */
// while (!flag_ADCDMA_TransferComplete);
/* Disable ADC, DMA and clock*/
powerDownADC_Temper();
/* Process mesured Temperature data - calculate average temperature value in °C */
processTempData();
if (flag_UserButton == TRUE) {
clearUserButtonFlag();
if (CurrentlyDisplayed == Display_TemperatureDegC)
CurrentlyDisplayed = Display_ADCval;
else
CurrentlyDisplayed = Display_TemperatureDegC;
}
if (CurrentlyDisplayed == Display_TemperatureDegC) {
/* print average temperature value in °C */
sprintf(strDisp, "%d °C", temperature_C );
} else {
/* print result of ADC conversion */
sprintf(strDisp, "> %d", tempAVG );
}
LCD_GLASS_Clear();
LCD_GLASS_DisplayString( (unsigned char *) strDisp );
/* Enable RTC Wakeup */
RTC_WakeUpCmd(ENABLE);
/* Clear WakeUp flag */
PWR_ClearFlag(PWR_FLAG_WU);
/* Enter in wait for interrupt stop mode*/
PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);
RCC_Configuration(); // reinitialize clock
/* After Wake up : Disable Wake up from RTC*/
RTC_WakeUpCmd(DISABLE);
}
}
