From b80ddc114523740beabc30921a28b51b6dc20632 Mon Sep 17 00:00:00 2001
From: Silvano Seva <silseva@fastwebnet.it>
Date: Sat, 10 Jul 2021 21:52:11 +0200
Subject: [PATCH] Implemented reading of PTT status from external microphone on
 MD-3x0 and MD-UV3x0

---
 platform/targets/MD-3x0/hwconfig.h   | 3 ++-
 platform/targets/MD-3x0/platform.c   | 7 +++++--
 platform/targets/MD-UV3x0/hwconfig.h | 3 ++-
 platform/targets/MD-UV3x0/platform.c | 7 +++++--
 4 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/platform/targets/MD-3x0/hwconfig.h b/platform/targets/MD-3x0/hwconfig.h
index 7c22eae9..3cf558db 100644
--- a/platform/targets/MD-3x0/hwconfig.h
+++ b/platform/targets/MD-3x0/hwconfig.h
@@ -80,7 +80,8 @@
 #define CH_SELECTOR_3 GPIOB,11
 
 /* Push-to-talk switch */
-#define PTT_SW GPIOE,11
+#define PTT_SW  GPIOE,11
+#define PTT_EXT GPIOE,12
 
 /*
  * Keyboard. Here we define only rows, since coloumn lines are the same as
diff --git a/platform/targets/MD-3x0/platform.c b/platform/targets/MD-3x0/platform.c
index bf198d5f..1fd45728 100644
--- a/platform/targets/MD-3x0/platform.c
+++ b/platform/targets/MD-3x0/platform.c
@@ -46,7 +46,8 @@ void platform_init()
     gpio_setMode(CH_SELECTOR_2, INPUT);
     gpio_setMode(CH_SELECTOR_3, INPUT);
 
-    gpio_setMode(PTT_SW, INPUT);
+    gpio_setMode(PTT_SW,  INPUT);
+    gpio_setMode(PTT_EXT, INPUT);
 
     gpio_setMode(PWR_SW, OUTPUT);
 
@@ -122,7 +123,9 @@ int8_t platform_getChSelector()
 bool platform_getPttStatus()
 {
     /* PTT line has a pullup resistor with PTT switch closing to ground */
-    return (gpio_readPin(PTT_SW) == 0) ? true : false;
+    uint8_t intPttStatus = gpio_readPin(PTT_SW);
+    uint8_t extPttStatus = gpio_readPin(PTT_EXT);
+    return ((intPttStatus == 0) || (extPttStatus == 0)) ? true : false;
 }
 
 bool platform_pwrButtonStatus()
diff --git a/platform/targets/MD-UV3x0/hwconfig.h b/platform/targets/MD-UV3x0/hwconfig.h
index a2ab3af9..5d532d9f 100644
--- a/platform/targets/MD-UV3x0/hwconfig.h
+++ b/platform/targets/MD-UV3x0/hwconfig.h
@@ -74,7 +74,8 @@
 #define CH_SELECTOR_1 GPIOB,11
 
 /* Push-to-talk switch */
-#define PTT_SW GPIOE,11
+#define PTT_SW  GPIOE,11
+#define PTT_EXT GPIOE,12
 
 /*
  * Keyboard. Here we define only rows, since coloumn lines are the same as
diff --git a/platform/targets/MD-UV3x0/platform.c b/platform/targets/MD-UV3x0/platform.c
index 67c6ca7d..6107b42c 100644
--- a/platform/targets/MD-UV3x0/platform.c
+++ b/platform/targets/MD-UV3x0/platform.c
@@ -43,7 +43,8 @@ void platform_init()
 
     gpio_setMode(PTT_SW, INPUT_PULL_UP);
 
-    gpio_setMode(PWR_SW, OUTPUT);
+    gpio_setMode(PTT_SW,  INPUT);
+    gpio_setMode(PTT_EXT, INPUT);
 
     /*
      * Initialise ADC1, for vbat, RSSI, ...
@@ -116,7 +117,9 @@ float platform_getVolumeLevel()
 bool platform_getPttStatus()
 {
     /* PTT line has a pullup resistor with PTT switch closing to ground */
-    return (gpio_readPin(PTT_SW) == 0) ? true : false;
+    uint8_t intPttStatus = gpio_readPin(PTT_SW);
+    uint8_t extPttStatus = gpio_readPin(PTT_EXT);
+    return ((intPttStatus == 0) || (extPttStatus == 0)) ? true : false;
 }
 
 bool platform_pwrButtonStatus()