From 3cf361151427e0f93ecc36575bbed63502c73adc Mon Sep 17 00:00:00 2001
From: Troy Gruetzmacher <tgruetzm@gmail.com>
Date: Thu, 1 Dec 2022 07:31:58 -0700
Subject: [PATCH] added end method to PDM to facilitate stopping PDM

---
 libraries/PDM/src/PDM.cpp | 20 ++++++++++++++++++++
 libraries/PDM/src/PDM.h   |  1 +
 2 files changed, 21 insertions(+)

diff --git a/libraries/PDM/src/PDM.cpp b/libraries/PDM/src/PDM.cpp
index c32756ea..8c169980 100644
--- a/libraries/PDM/src/PDM.cpp
+++ b/libraries/PDM/src/PDM.cpp
@@ -37,6 +37,26 @@ bool AP3_PDM::begin(pin_size_t pinPDMData, pin_size_t pinPDMClock)
     return (true);
 }
 
+bool AP3_PDM::end()
+{
+    uint32_t retval = am_hal_pdm_disable(_PDMhandle);
+    if (retval != AP3_OK)
+    {
+        return false;
+    }
+    retval = (uint32_t)am_hal_pdm_power_control(_PDMhandle, AM_HAL_PDM_POWER_OFF, false);
+    if (retval != AP3_OK)
+    {
+        return retval;
+    }
+    retval = am_hal_pdm_deinitialize(_PDMhandle);
+    if (retval != AP3_OK)
+    {
+        return false;
+    }
+    return true;
+}
+
 bool AP3_PDM::available(void)
 {
     if (buff1New || buff2New)
diff --git a/libraries/PDM/src/PDM.h b/libraries/PDM/src/PDM.h
index 98a0bc7d..2b81dcfd 100644
--- a/libraries/PDM/src/PDM.h
+++ b/libraries/PDM/src/PDM.h
@@ -96,6 +96,7 @@ class AP3_PDM
     //AP3_PDM(uint16_t *userBuffer, uint32_t bufferSize);
 
     bool begin(pin_size_t pinPDMData = MIC_DATA, pin_size_t pinPDMClock = MIC_CLOCK);
+    bool end();
     bool available(void); //Goes true if circular buffer is not empty
     bool isOverrun(void); //Goes true if head crosses tail