ESP32 I2S getClockSource

Author: pschatzmann

src/AudioTools/CoreAudio/AudioI2S/I2SESP32V1.h

@@ -289,30 +289,27 @@ class I2SDriverESP32V1 {
     soc_periph_i2s_clk_src_t getClockSource(I2SConfigESP32V1 &cfg){
       soc_periph_i2s_clk_src_t result = I2S_CLK_SRC_DEFAULT;
       // use mclk pin as input in slave mode if supported
-      bool is_pin_mck_input = false;
+      bool is_pin_mck_output = true;
       if (cfg.pin_mck != -1) {
         if (!cfg.is_master) {
 #if SOC_I2S_HW_VERSION_2
           LOGI("pin_mclk is input");
           result = I2S_CLK_SRC_EXTERNAL;
-          is_pin_mck_input = true;
+          is_pin_mck_output = false;
 #else
           LOGE("pin_mclk as input not supported");
 #endif
         }
 
-        if (!is_pin_mck_input) {
+        // select APLL clock if possible
+        if (is_pin_mck_output && cfg.use_apll) {
           // select clock source
 #if SOC_I2S_SUPPORTS_APLL
-          if (cfg.use_apll) {
             result = I2S_CLK_SRC_APLL;
             LOGI("clk_src is I2S_CLK_SRC_APLL");
-          }
 #elif SOC_I2S_SUPPORTS_PLL_F160M
-          if (cfg.use_apll) {
             result = I2S_CLK_SRC_PLL_160M;
             LOGI("clk_src is I2S_CLK_SRC_PLL_160M");
-          }
 #endif
         }
       }