EFM32 Gecko Software Documentation
efm32g-doc-5.1.2
|
Driver for the SPV1840LR5H-B MEMS Microphone.
Copyright 2016 Silicon Laboratories, Inc. http://www.silabs.com
This file is licensed under the Silicon Labs License Agreement. See the file "Silabs_License_Agreement.txt" for details. Before using this software for any purpose, you must agree to the terms of that agreement.
Definition in file mic.c.
#include "em_device.h"
#include "em_adc.h"
#include "em_emu.h"
#include "em_cmu.h"
#include "em_prs.h"
#include "em_letimer.h"
#include "dmadrv.h"
#include "thunderboard/util.h"
#include "thunderboard/board.h"
#include "thunderboard/mic.h"
#include <math.h>
Go to the source code of this file.
Functions | |
void | MIC_deInit (void) |
Powers down the MEMS microphone stops the ADC and frees up the DMA channel. More... | |
float | MIC_getMean (void) |
Calculates the average value of the samples in the buffer. More... | |
uint16_t * | MIC_getSampleBuffer (void) |
Gets the sample buffer. More... | |
float | MIC_getSoundLevel (float *var) |
Calculates the sound level. More... | |
uint32_t | MIC_init (uint32_t fs, uint16_t *buffer, size_t len) |
Initializes MEMS microphone and sets up the DMA, ADC and clocking. More... | |
bool | MIC_isBusy (void) |
Checks if the microphone is in use. More... | |
void | MIC_start (uint32_t nSamples) |
Starts taking samples using DMA from the microphone. More... | |