use pwm buzzer

variants/elecrow_panel/platformio.ini

@@ -41,7 +41,6 @@ build_flags =
   -D CONFIG_DISABLE_HAL_LOCKS=1
   -D HAS_SCREEN=0
   -D HAS_TFT=1
-;  -D USE_PIN_BUZZER
   -D RAM_SIZE=6144
 	-D LV_LVGL_H_INCLUDE_SIMPLE
 	-D LV_CONF_INCLUDE_SIMPLE
@@ -85,7 +84,7 @@ build_flags =
   -D HAS_SDCARD
   -D SDCARD_USE_SOFT_SPI
   -D SPI_DRIVER_SELECT=2
-  -D USE_I2S_BUZZER
+  -D USE_PIN_BUZZER
 ;  -D INPUTDRIVER_BUTTON_TYPE=0 ; no button as this pin is assigned to LoRa cs!
   -D SCREEN_TOUCH_INT=47 ; used to wake up the MCU by touch
   -D LGFX_DRIVER_TEMPLATE
@@ -134,8 +133,9 @@ build_flags =
   -D HAS_SDCARD
   -D SDCARD_USE_SOFT_SPI
   -D SPI_DRIVER_SELECT=2
-  -D USE_I2S_BUZZER
-  -D INPUTDRIVER_BUTTON_TYPE=0
+  -D USE_PIN_BUZZER
+;  -D INPUTDRIVER_BUTTON_TYPE=0 ; no button as this pin is assigned to LoRa cs!
+  -D SCREEN_TOUCH_INT=47 ; used to wake up the MCU by touch
   -D LV_CACHE_DEF_SIZE=2097152
   -D LGFX_DRIVER_TEMPLATE
   -D LGFX_DRIVER=LGFX_GENERIC

variants/elecrow_panel/variant.h

@@ -1,8 +1,6 @@
 #define I2C_SDA 15
 #define I2C_SCL 16
 
-#define PIN_BUZZER 8
-
 #if TFT_HEIGHT == 320 && not defined(HAS_TFT) // 2.4 and 2.8 TFT
 // ST7789 TFT LCD
 #define ST7789_CS 40
@@ -120,13 +118,16 @@
 #define SC7277_PCLK_ACTIVE_NEG 0
 #endif
 
-#if TFT_HEIGHT == 320
+#if TFT_HEIGHT == 320 // 2.4-2.8 have I2S audio
 // dac / amp
-#define HAS_I2S
+// #define HAS_I2S // didn't get I2S sound working
+#define PIN_BUZZER 8 // using pwm buzzer instead (nobody will notice, lol)
 #define DAC_I2S_BCK 13
 #define DAC_I2S_WS 11
 #define DAC_I2S_DOUT 12
-#define DAC_I2S_MCLK 7 // don't use GPIO0 because it's assigned to LoRa or button
+#define DAC_I2S_MCLK 8 // don't use GPIO0 because it's assigned to LoRa or button
+#else
+#define PIN_BUZZER 8
 #endif
 
 // GPS via UART1 connector