libraries/PDM/src/PDM.cpp: Add PDM begin and end.

libraries/PDM/examples/PdmBasic/PdmBasic.ino

@@ -0,0 +1,21 @@
+#include "PDM.h"
+
+PdmClass PDM;
+void setup()
+{
+    Serial.begin(115200);
+    if (!PDM.begin(2, 16000)) {
+    Serial.println("Failed to start PDM!");
+    while (1);
+  }
+
+    Serial.println("PDM Initialized!");
+
+
+  PDM.end();
+}
+
+void loop()
+{
+    // Main loop does nothing, all handled via ISR and callback.
+}

libraries/PDM/keywords.txt

@@ -0,0 +1,32 @@
+#######################################
+# Syntax Coloring Map For PDM
+#######################################
+
+#######################################
+# Datatypes (KEYWORD1)
+#######################################
+
+#######################################
+# Methods and Functions (KEYWORD2)
+#######################################
+
+begin	            KEYWORD2
+end	                KEYWORD2
+available           KEYWORD2
+read                KEYWORD2
+onReceive           KEYWORD2
+setGain             KEYWORD2
+setBufferSize       KEYWORD2
+
+
+#######################################
+# Instances (KEYWORD2)
+#######################################
+
+PDM	KEYWORD2
+
+#######################################
+# Constants (LITERAL1)
+#######################################
+
+

libraries/PDM/library.properties

@@ -0,0 +1,10 @@
+name=PDM
+version=0.1.0
+author=Infineon Technologies AG
+maintainer=Infineon Technologies AG <[email protected]>
+sentence=Provides PDM audio input and output support for PSoC6.
+paragraph=Implements an easy interface for reading (microphone) and PDM audio streams on PSoC6.
+category=Signal Input/Output
+url=https://github.com/Infineon/arduino-core-psoc6/tree/main/libraries/PDM
+architectures=psoc6
+includes=PDM.h

libraries/PDM/src/PDM.cpp

@@ -0,0 +1,30 @@
+#include "PDM.h"
+
+#define PDM_assert(cy_ret) if (cy_ret != CY_RSLT_SUCCESS) { \
+        return; \
+}
+
+bool PdmClass::begin(int channels, int sample_rate) {
+    // Set up config struct (non-const!)
+    cyhal_pdm_pcm_cfg_t pdm_pcm_cfg = {
+        .sample_rate = SAMPLE_RATE_HZ,
+        .decimation_rate = DECIMATION_RATE,
+        .mode = (channels == 2) ? CYHAL_PDM_PCM_MODE_STEREO : CYHAL_PDM_PCM_MODE_LEFT,
+        .word_length = 16,
+        .left_gain = 0,
+        .right_gain = 0,
+    };
+    pdm_pcm_cfg.sample_rate = sample_rate;
+    pdm_status = cyhal_pdm_pcm_init(&pdm_pcm, PDM_DATA, PDM_CLK, &audio_clock, &pdm_pcm_cfg);
+    if (pdm_status != CY_RSLT_SUCCESS) {
+        return false;
+    }
+
+    return true;
+}
+
+void PdmClass::end() {
+    pdm_status = cyhal_pdm_pcm_stop(&pdm_pcm);
+    PDM_assert(pdm_status);
+    cyhal_pdm_pcm_free(&pdm_pcm);
+}

libraries/PDM/src/PDM.h

@@ -0,0 +1,26 @@
+#ifndef PDM_H
+#define PDM_H
+
+#include "Arduino.h"
+#include "cyhal_pdmpcm.h"
+
+#define PDM_DATA   P10_5
+#define PDM_CLK    P10_4
+
+#define SAMPLE_RATE_HZ   8000u
+#define DECIMATION_RATE  64u
+
+class PdmClass {
+public:
+    bool begin(int channels, int sample_rate);
+    void end();
+
+private:
+    cy_rslt_t pdm_status;
+    cyhal_clock_t audio_clock;
+    cyhal_pdm_pcm_t pdm_pcm;
+};
+
+extern PdmClass PDM;
+
+#endif