Implemented mic gain setting based on UI for Module 17

meson.build

@@ -389,6 +389,7 @@ mod17_src = ['platform/targets/Module17/platform.c',
              'platform/drivers/audio/inputStream_Mod17.cpp',
              'platform/drivers/audio/outputStream_Mod17.cpp',
              'platform/drivers/audio/audio_Mod17.c',
+             'platform/drivers/audio/MAX9814_Mod17.cpp',
              'platform/drivers/baseband/MCP4551_Mod17.cpp']
 
 mod17_src = src + openrtx_ui_module17 + mod17_src + stm32f405_src

platform/drivers/audio/MAX9814.h

@@ -0,0 +1,34 @@
+/***************************************************************************
+ *   Copyright (C) 2022 by Mathis Schmieder DB9MAT                         *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 3 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, see <http://www.gnu.org/licenses/>   *
+ ***************************************************************************/
+
+#ifndef MAX9814_H
+#define MAX9814_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void max9814_setGain(uint8_t gain);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MAX9814_H */

platform/drivers/audio/MAX9814_Mod17.cpp

@@ -0,0 +1,42 @@
+/***************************************************************************
+ *   Copyright (C) 2021 - 2022 by Mathis Schmieder DB9MAT                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 3 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, see <http://www.gnu.org/licenses/>   *
+ ***************************************************************************/
+
+#include <interfaces/gpio.h>
+#include <hwconfig.h>
+#include "MAX9814.h"
+
+/*
+ * Implementation of MAX9814 gain setting
+ */
+
+void max9814_setGain(uint8_t gain)
+{
+    if (gain == 0)
+    {
+        gpio_setMode(MIC_GAIN, OUTPUT);
+        gpio_setPin(MIC_GAIN); // 40 dB gain
+    }
+    else if (gain == 1)
+    {
+        gpio_setMode(MIC_GAIN, OUTPUT);
+        gpio_clearPin(MIC_GAIN); // 50 dB gain
+    }
+    else
+    {
+        gpio_setMode(MIC_GAIN, INPUT); // High impedance, 60 dB gain
+    }
+}

platform/drivers/audio/audio_Mod17.c

@@ -21,6 +21,7 @@
 #include <interfaces/audio.h>
 #include <interfaces/gpio.h>
 #include <hwconfig.h>
+#include "MAX9814.h"
 
 
 static const uint8_t pathCompatibilityMatrix[9][9] =
@@ -42,11 +43,10 @@ void audio_init()
 {
     gpio_setMode(SPK_MUTE, OUTPUT);
     gpio_setMode(MIC_MUTE, OUTPUT);
-    gpio_setMode(MIC_GAIN, OUTPUT);
 
     gpio_setPin(SPK_MUTE);      // Off  = logic high
     gpio_clearPin(MIC_MUTE);    // Off  = logic low
-    gpio_setPin(MIC_GAIN);      // gain = 40 dB
+    max9814_setGain(0);         // 40 dB gain
 }
 
 void audio_terminate()

platform/drivers/baseband/radio_Mod17.cpp

@@ -24,6 +24,7 @@
 #include <calibInfo_Mod17.h>
 #include <hwconfig.h>
 #include <MCP4551.h>
+#include "../audio/MAX9814.h"
 
 enum  opstatus      radioStatus;   // Current operating status
 const mod17Calib_t *calData;       // Calibration data
@@ -87,6 +88,7 @@ void radio_enableTx()
 
     mcp4551_setWiper(SOFTPOT_TX, calData->tx_wiper);
     mcp4551_setWiper(SOFTPOT_RX, calData->rx_wiper);
+    max9814_setGain(calData->mic_gain);
 }
 
 void radio_disableRtx()