Updated comments on pull-up resistors

Author: PilnyTomas

libraries/SD_MMC/examples/SDMMC_Test/SDMMC_Test.ino

@@ -22,7 +22,7 @@
  *                  |                                  █/
  *                  |__▍___▊___█___█___█___█___█___█___/
  * WARNING: ALL data pins must be pulled up to 3.3V with an external 10k Ohm resistor!
- * Note to ESP32 pin 2 (D0): Add a 1K Ohm pull-up resistor after flashing
+ * Note to ESP32 pin 2 (D0): Add a 1K Ohm pull-up resistor to 3.3V after flashing
  *
  * For more info see file README.md in this library or on URL:
  * https://github.com/espressif/arduino-esp32/tree/master/libraries/SD_MMC
@@ -38,7 +38,7 @@
 // Note: ESP32-S3-WROOM-1 does not have GPIO 33 and 34 broken out.
 // Note: The board ESP32-S3-USB-OTG has predefined default pins and the following definitions with the setPins() call will not be compiled.
 // Note: Pins in this definition block are ordered from top down in order in which they are on the full-sized SD card
-//       from left to right when facing the pins down (when connected to a breadboard)
+//   from left to right when facing the pins down (when connected to a breadboard)
 
 #if defined(SOC_SDMMC_USE_GPIO_MATRIX) && not defined(BOARD_HAS_SDMMC)
     int d1  = 21; // SD pin 8 - Add a 10k Ohm pull-up resistor to 3.3V if using 4-bit mode (use_1_bit_mode = false)
@@ -237,7 +237,7 @@ void setup(){
     if(!SD_MMC.begin("/sdcard", use_1_bit_mode)){
         Serial.println("Card Mount Failed.");
         Serial.println("Increase log level to see more info: Tools > Core Debug Level > Verbose");
-        Serial.println("Make sure that all data pins have a 10k Ohm pull-up resistor");
+        Serial.println("Make sure that all data pins have a 10k Ohm pull-up resistor to 3.3V");
 #ifdef SOC_SDMMC_USE_GPIO_MATRIX
         Serial.println("Make sure that when using generic ESP32-S3 board the pins are setup using SD_MMC.setPins()");
 #endif

libraries/SD_MMC/examples/SDMMC_time/SDMMC_time.ino

@@ -22,7 +22,7 @@
  *                  |                                  █/
  *                  |__▍___▊___█___█___█___█___█___█___/
  * WARNING: ALL data pins must be pulled up to 3.3V with external 10k Ohm resistor!
- * Note to ESP32 pin 2 (D0): Add 1K Ohm pull-up resistor after flashing
+ * Note to ESP32 pin 2 (D0): Add 1K Ohm pull-up resistor to 3.3V after flashing
  *
  * For more info see file README.md in this library or on URL:
  * https://github.com/espressif/arduino-esp32/tree/master/libraries/SD_MMC
@@ -47,18 +47,18 @@ byte daysavetime = 1;
 // Note: ESP32-S3-WROOM-1 does not have GPIO 33 and 34 broken out.
 // Note: The board ESP32-S3-USB-OTG has predefined default pins and the following definitions with the setPins() call will not be compiled.
 // Note: Pins in this definition block are ordered from top down in order in which they are on the full-sized SD card
-//       from left to right when facing the pins down (when connected to a breadboard)
+//   from left to right when facing the pins down (when connected to a breadboard)
 
 #if defined(SOC_SDMMC_USE_GPIO_MATRIX) && not defined(BOARD_HAS_SDMMC)
-    int d1  = 21; // SD pin 8 - Add 10k Ohm pull-up if using 4-bit mode (use_1_bit_mode = false)
-    int d0  = 47; // SD pin 7 - Add 10k Ohm pull-up
+    int d1  = 21; // SD pin 8 - Add a 10k Ohm pull-up resistor to 3.3V if using 4-bit mode (use_1_bit_mode = false)
+    int d0  = 47; // SD pin 7 - Add a 10k Ohm pull-up resistor to 3.3V
     //     GND pin - SD pin 6
-    int clk = 39; // SD pin 5 - Add 10k Ohm pull-up
+    int clk = 39; // SD pin 5 - Add a 10k Ohm pull-up resistor to 3.3V
     //    3.3V pin - SD pin 4
     //     GND pin - SD pin 3
-    int cmd = 40; // SD pin 2 - Add 10k Ohm pull-up
-    int d3  = 41; // SD pin 1 - Add 10k Ohm pull-up to card's pin even when using 1-bit mode
-    int d2  = 42; // SD pin 9 - Add 10k Ohm pull-up if using 4-bit mode (use_1_bit_mode = false)
+    int cmd = 40; // SD pin 2 - Add a 10k Ohm pull-up resistor to 3.3V
+    int d3  = 41; // SD pin 1 - Add a 10k Ohm pull-up resistor to 3.3V to card's pin even when using 1-bit mode
+    int d2  = 42; // SD pin 9 - Add a 10k Ohm pull-up resistor to 3.3V if using 4-bit mode (use_1_bit_mode = false)
 #endif
 
 bool use_1_bit_mode = false; // Change the value to `true` to use 1-bit mode instead of the 4-bit mode
@@ -240,7 +240,7 @@ void setup(){
     if(!SD_MMC.begin("/sdcard", use_1_bit_mode)){
         Serial.println("Card Mount Failed.");
         Serial.println("Increase log level to see more info: Tools > Core Debug Level > Verbose");
-        Serial.println("Make sure that all data pins have a 10k Ohm pull-up resistor");
+        Serial.println("Make sure that all data pins have a 10k Ohm pull-up resistor to 3.3V");
 #ifdef SOC_SDMMC_USE_GPIO_MATRIX
         Serial.println("Make sure that when using generic ESP32-S3 board the pins are setup using SD_MMC.setPins()");
 #endif