diff -r b74b0e4902c3 -r ad2c8b13eb88 main/task_tft.c
--- a/main/task_tft.c	Sat Oct 20 13:23:15 2018 +0200
+++ b/main/task_tft.c	Sat Oct 20 17:09:48 2018 +0200
@@ -10,13 +10,13 @@
 
 #include "config.h"
 
-spi_lobo_device_handle_t	spi;
-spi_lobo_device_handle_t	tsspi = NULL;
-extern sButton			Buttons[MAXBUTTONS];	// 40 buttons on a screen.
-time_t				now;
-struct tm			timeinfo;
-char				s_timer[10];
-char				s_top_msg[64];
+spi_lobo_device_handle_t	spi;				///< TFT screen SPI handler
+spi_lobo_device_handle_t	tsspi = NULL;			///< Touchscreen SPI handler
+extern sButton			Buttons[MAXBUTTONS];		///< 40 buttons on a screen.
+time_t				now;				///< Current time
+struct tm			timeinfo;			///< Current time structure
+char				s_timer[10];			///< Timer sctring buffer
+char				s_top_msg[64];			///< Top message string buffer
 
 extern float			stageTemp;
 extern uint16_t			stageTime;
@@ -27,15 +27,14 @@
 extern uint32_t			pumpTime;
 extern uint32_t			TimeBrewing;
 extern uint16_t			Steady;
-esp_timer_handle_t		timerHandle;
+esp_timer_handle_t		timerHandle;			///< Timer handler
 extern bool			_NewMinute;
 extern bool			_UseHLT;
 extern bool			System_TimeOk;
 
 static const char		*TAG = "task_tft";
 
-// Define which spi bus to use TFT_VSPI_HOST or TFT_HSPI_HOST
-#define SPI_BUS			TFT_HSPI_HOST
+#define SPI_BUS			TFT_HSPI_HOST			///< SPI bus for the TFT, TFT_VSPI_HOST or TFT_HSPI_HOST
 
 extern int			Main_Screen;
 extern int			Old_Screen;