From 3d9cefdd0313e31d4c14ae64115aa154cb24e912 Mon Sep 17 00:00:00 2001
From: Silvano Seva <silseva@fastwebnet.it>
Date: Tue, 10 Aug 2021 09:32:43 +0200
Subject: [PATCH] Fixed audio playback test: added a missing conversion from 12
 bit to 8 bit

---
 tests/platform/gimmi_ridimmi.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tests/platform/gimmi_ridimmi.c b/tests/platform/gimmi_ridimmi.c
index 065159dc..0bdfec4c 100644
--- a/tests/platform/gimmi_ridimmi.c
+++ b/tests/platform/gimmi_ridimmi.c
@@ -190,10 +190,18 @@ int main()
     gpio_setMode(BEEP_OUT, ALTERNATE);
     gpio_setAlternateFunction(BEEP_OUT, 2);
 
+    gpio_setPin(GREEN_LED);
+
     delayMs(3000);
 
     recordMic(sampleBuf);
 
+    /* Convert samples from 12 bit to 8 bit, as required by PWM audio */
+    for(size_t i = 0; i < numSamples; i++)
+    {
+        sampleBuf[i] >>= 4;
+    }
+
     /* End of recording, play sound */
     gpio_clearPin(GREEN_LED);
     gpio_setPin(RED_LED);