MD-UV3x0: using HR_C6000 DAC for "beep" tones

meson.build

@@ -82,6 +82,7 @@ openrtx_inc = ['openrtx/include',
                'platform/drivers/USB',
                'platform/drivers/GPIO',
                'platform/drivers/tones',
+               'platform/drivers/audio',
                'platform/drivers/baseband',
                'platform/drivers/backlight',
                'platform/drivers/chSelector']

platform/targets/MD-UV3x0/platform.c

@@ -28,6 +28,7 @@
 #include <peripherals/rtc.h>
 #include <interfaces/audio.h>
 #include <chSelector.h>
+#include <Cx000_dac.h>
 
 #ifdef CONFIG_SCREEN_BRIGHTNESS
 #include <backlight.h>
@@ -190,20 +191,12 @@ void platform_ledOff(led_t led)
 
 void platform_beepStart(uint16_t freq)
 {
-    // calculate appropriate volume.
-    uint8_t vol = platform_getVolumeLevel();
-    // Since beeps have been requested, we do not want to have 0 volume.
-    // We also do not want the volume to be excessive.
-    if (vol < 10)
-        vol = 5;
-    if (vol > 176)
-        vol = 176;
-    toneGen_beepOn((float)freq, vol, 0);
+    Cx000dac_startBeep(freq);
 }
 
 void platform_beepStop()
 {
-    toneGen_beepOff();
+    Cx000dac_stopBeep();
 }
 
 datetime_t platform_getCurrentTime()