Hi Chris Sterzik, thank you very much for your help, I posted the code below that interest me for the comunity, but I am not figure out how to change the sampling rate of one sample per second for example, you can help me? My code for this post is from the microphone example ( Code-Link ): #include "msp.h" #include #include #include #include // Buffer specs #define SAMPLE_LENGTH 1024 int16_t data_array1[SAMPLE_LENGTH]; int16_t data_array2[SAMPLE_LENGTH]; //volatile arm_status status; #define SMCLK_FREQUENCY 48000000 #define SAMPLE_FREQUENCY 8000 /* DMA Control Table */ #ifdef ewarm #pragma data_alignment=256 #else #pragma DATA_ALIGN(controlTable, 256) #endif uint8_t controlTable[256]; volatile int switch_data = 0; uint32_t color = 0; /* Timer_A PWM Configuration Parameter */ Timer_A_PWMConfig pwmConfig = { TIMER_A_CLOCKSOURCE_SMCLK, TIMER_A_CLOCKSOURCE_DIVIDER_1, (SMCLK_FREQUENCY/SAMPLE_FREQUENCY), TIMER_A_CAPTURECOMPARE_REGISTER_1, TIMER_A_OUTPUTMODE_SET_RESET, (SMCLK_FREQUENCY/SAMPLE_FREQUENCY)/2 }; void main(void) { /* Halting WDT and disabling master interrupts */ MAP_WDT_A_holdTimer(); MAP_Interrupt_disableMaster(); /* Set the core voltage level to VCORE1 */ MAP_PCM_setCoreVoltageLevel(PCM_VCORE1); /* Set 2 flash wait states for Flash bank 0 and 1*/ MAP_FlashCtl_setWaitState(FLASH_BANK0, 2); MAP_FlashCtl_setWaitState(FLASH_BANK1, 2); /* Initializes Clock System */ MAP_CS_setDCOCenteredFrequency(CS_DCO_FREQUENCY_48); MAP_CS_initClockSignal(CS_MCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_1 ); MAP_CS_initClockSignal(CS_HSMCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_1 ); MAP_CS_initClockSignal(CS_SMCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_1 ); MAP_CS_initClockSignal(CS_ACLK, CS_REFOCLK_SELECT, CS_CLOCK_DIVIDER_1 ); /* Configuring Timer_A to have a period of approximately 500ms and * an initial duty cycle of 10% of that (3200 ticks) */ MAP_Timer_A_generatePWM(TIMER_A0_BASE, &pwmConfig); /* Initializing ADC (MCLK/1/1) */ MAP_ADC14_enableModule(); MAP_ADC14_initModule(ADC_CLOCKSOURCE_MCLK, ADC_PREDIVIDER_1, ADC_DIVIDER_1, 0); MAP_ADC14_setSampleHoldTrigger(ADC_TRIGGER_SOURCE1, false); /* Configuring GPIOs (5.5 A0) */ MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P5, GPIO_PIN5, GPIO_TERTIARY_MODULE_FUNCTION); /* Configuring ADC Memory */ MAP_ADC14_configureSingleSampleMode(ADC_MEM0, true); MAP_ADC14_configureConversionMemory(ADC_MEM0, ADC_VREFPOS_AVCC_VREFNEG_VSS, ADC_INPUT_A0, false); // /* Set ADC result format to signed binary */ // MAP_ADC14_setResultFormat(ADC_SIGNED_BINARY); /* Configuring DMA module */ MAP_DMA_enableModule(); MAP_DMA_setControlBase(controlTable); MAP_DMA_disableChannelAttribute(DMA_CH7_ADC14, UDMA_ATTR_ALTSELECT | UDMA_ATTR_USEBURST | UDMA_ATTR_HIGH_PRIORITY | UDMA_ATTR_REQMASK); /* Setting Control Indexes. In this case we will set the source of the * DMA transfer to ADC14 Memory 0 * and the destination to the * destination data array. */ MAP_DMA_setChannelControl(UDMA_PRI_SELECT | DMA_CH7_ADC14, UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 | UDMA_ARB_1); MAP_DMA_setChannelTransfer(UDMA_PRI_SELECT | DMA_CH7_ADC14, UDMA_MODE_PINGPONG, (void*) &ADC14->MEM[0], data_array1, SAMPLE_LENGTH); MAP_DMA_setChannelControl(UDMA_ALT_SELECT | DMA_CH7_ADC14, UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 | UDMA_ARB_1); MAP_DMA_setChannelTransfer(UDMA_ALT_SELECT | DMA_CH7_ADC14, UDMA_MODE_PINGPONG, (void*) &ADC14->MEM[0], data_array2, SAMPLE_LENGTH); /* Assigning/Enabling Interrupts */ MAP_DMA_assignInterrupt(DMA_INT1, 7); MAP_Interrupt_enableInterrupt(INT_DMA_INT1); MAP_DMA_assignChannel(DMA_CH7_ADC14); MAP_DMA_clearInterruptFlag(7); MAP_Interrupt_enableMaster(); /* Now that the DMA is primed and setup, enabling the channels. The ADC14 * hardware should take over and transfer/receive all bytes */ MAP_DMA_enableChannel(7); MAP_ADC14_enableConversion(); while(1) { MAP_PCM_gotoLPM0(); } } /* Completion interrupt for ADC14 MEM0 */ void DMA_INT1_IRQHandler(void) { /* Switch between primary and alternate bufferes with DMA's PingPong mode */ if (MAP_DMA_getChannelAttribute(7) & UDMA_ATTR_ALTSELECT) { MAP_DMA_setChannelControl(UDMA_PRI_SELECT | DMA_CH7_ADC14, UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 | UDMA_ARB_1); MAP_DMA_setChannelTransfer(UDMA_PRI_SELECT | DMA_CH7_ADC14, UDMA_MODE_PINGPONG, (void*) &ADC14->MEM[0], data_array1, SAMPLE_LENGTH); switch_data = 1; } else { MAP_DMA_setChannelControl(UDMA_ALT_SELECT | DMA_CH7_ADC14, UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 | UDMA_ARB_1); MAP_DMA_setChannelTransfer(UDMA_ALT_SELECT | DMA_CH7_ADC14, UDMA_MODE_PINGPONG, (void*) &ADC14->MEM[0], data_array2, SAMPLE_LENGTH); switch_data = 0; } }
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