Proposal for SSD1306 display's backlight timeout

[fenyvesi]

The excellent, feature rich program manages turning off a display, but only in case of TFT screens. I propose to extend it for OLED, too.

1. A public routine in SSSD1306.h: void SSD1306::displaySwitch(bool enable) { i2c_cmd_handle_t cmd ; cmd = i2c_cmd_link_create() ; i2c_master_start ( cmd ) ; i2c_master_write_byte ( cmd, (OLED_I2C_ADDRESS << 1) | I2C_MASTER_WRITE, true ) ; i2c_master_write_byte ( cmd, OLED_CONTROL_BYTE_CMD_SINGLE, true ) ; if (enable ) { i2c_master_write_byte ( cmd, OLED_CMD_DISPLAY_ON, true ) ; } else { i2c_master_write_byte ( cmd, OLED_CMD_DISPLAY_OFF, true ) ; } i2c_master_stop ( cmd ) ; i2c_master_cmd_begin ( I2C_NUM_0, cmd, 10 / portTICK_PERIOD_MS ) ; i2c_cmd_link_delete ( cmd ) ; }
2. Defining a standalone ckecking-time routine (getting from timer100() interrupt routine) called from handle_spec(), avoiding guru meditation error. void check_display_live() { // check switching display off if ( ++bltimer == BL_TIME ) // Time to blank the TFT screen? { bltimer = 0 ; // Yes, reset counter blset ( false ) ; // Disable TFT (backlight) } } Calling: void handle_spec() { ... if ( time_req ) // Time to refresh timetxt? { time_req = false ; // Yes, clear request if ( NetworkFound ) // Time available? { displaytime ( timetxt ) ; // Write to TFT screen displayvolume() ; // Show volume on display displaybattery() ; // Show battery charge on display check_display_live(); // switch off display? } } ... }

[fenyvesi]

I don't know why the inserted code looks so strange. Sorry.

[Edzelf]

Yes, I refuse to read it.

[fenyvesi]

Once more. The code feature button somehow distorted the lines.

The excellent, feature rich program manages turning off a display, but only in case of TFT screens. I propose to extend it for OLED, too.

1. A public routine in SSSD1306.h:

   void SSD1306::displaySwitch(bool enable)
   {
   i2c_cmd_handle_t cmd ;
   cmd = i2c_cmd_link_create() ;
   i2c_master_start ( cmd ) ;
       i2c_master_write_byte ( cmd, (OLED_I2C_ADDRESS << 1) | I2C_MASTER_WRITE, true ) ;
       i2c_master_write_byte ( cmd, OLED_CONTROL_BYTE_CMD_SINGLE, true ) ;
   if (enable ) {
       i2c_master_write_byte ( cmd, OLED_CMD_DISPLAY_ON, true ) ;
   } else {
       i2c_master_write_byte ( cmd, OLED_CMD_DISPLAY_OFF, true ) ;
   }
   i2c_master_stop ( cmd ) ;
   i2c_master_cmd_begin ( I2C_NUM_0, cmd, 10 / portTICK_PERIOD_MS ) ;
   i2c_cmd_link_delete ( cmd ) ;
   }

   2. Defining a standalone time-ckecking routine (getting from timer100() interrupt routine) called from handle_spec(), avoiding guru meditation error.

void check_display_live() {            // check switching display off
    if ( ++bltimer == BL_TIME )                // Time to blank the TFT screen?
    {
      bltimer = 0 ;                                // Yes, reset counter
      blset ( false ) ;                            // Disable TFT (backlight)
    }
}

3. Calling:

   void handle_spec() {
   ...
   if ( time_req )                                             // Time to refresh timetxt?
   {
   time_req = false ;                                        // Yes, clear request
   if ( NetworkFound  )                                      // Time available?
   {
       displaytime ( timetxt ) ;                     // Write to TFT screen
       displayvolume() ;                             // Show volume on display
       displaybattery() ;                            // Show battery charge on display
       check_display_live();                 // switch off display?
   }
   }
   .....
   }

[fenyvesi]

I missed the modified blset() routine itself.

void  blset ( bool enable )                     // mod by fgy (guru meditation!!!
{
#ifdef OLED
    tft->displaySwitch(enable);
#else
........
#endif
}