Added start of AN00248

examples/AN00248_xua_example_pdm_mics/src/audiohw.xc

@@ -0,0 +1,28 @@
+#include <xs1.h>
+#include <assert.h>
+#include <platform.h>
+
+#include "xua.h"
+
+/* 0: DAC reset */
+/* 1: Ethernet Phy reset */
+on tile[1] : out port p_gpio = XS1_PORT_4F;
+
+void AudioHwInit()
+{
+    /* DAC in reset */
+    p_gpio <: 0;
+
+    return;    
+}
+
+/* Configures the external audio hardware for the required sample frequency */
+void AudioHwConfig(unsigned samFreq, unsigned mClk, unsigned dsdMode,
+    unsigned sampRes_DAC, unsigned sampRes_ADC)
+{
+    /* Note, without any config the Cirrus 2100 will output it's 24.576MHz ref clock
+       to the Aux output - which we will use for mclk */
+
+    return;
+}
+//: