Merge pull request #16982 from maribu/cpu/esp32/doc

cpu/esp32, boards/esp32-wrover-kit: restore intended alignment of tables

boards/esp32-wrover-kit/doc.txt

@@ -79,6 +79,8 @@ These abbreviations are used in subsequent tables:
 *SDC* = SD-Card interface is used (module **sdcard_spi** is enabled)<br>
 *CAM* = Camera is plugged in/used
 
+<center>
+
 | Function              | None      | SDC       | CAM       | SDC + CAM | Remarks                       | Configuration                 |
 |:----------------------|-----------|-----------|-----------|-----------|:------------------------------|-------------------------------|
 | `ADC_LINE(0)`         | `GPIO34`  | `GPIO34`  | -         | -         | `CAMERA_D6`                   | \ref esp32_adc_channels       |
@@ -122,8 +124,12 @@ These abbreviations are used in subsequent tables:
 | `CAMERA_SIO_C`        | -         | -         | `GPIO27`  | `GPIO27`  |                               |                               |
 | `CAMERA_RESET`        | -         | -         | `GPIO0`   | `GPIO0`   |                               |                               |
 
+</center>
+
 Following table shows the default board configuration sorted by GPIOs.
 
+<center>
+
 | Pin    | None                   | SDC                 | CAM                 | SDC+CAM                    | Remarks |
 |:-------|:-----------------------|:--------------------|:--------------------|:---------------------------|:-----|
 | GPIO0  | PWM_DEV(0):0 / LED0    | PWM_DEV(0):0 / LED0 | CAMERA_RESET        | CAMERA_RESET               | |
@@ -159,6 +165,8 @@ Following table shows the default board configuration sorted by GPIOs.
 | GPIO36 | ADC_LINE(2)            | ADC_LINE(2)         | ADC_LINE(2)         | CAMERA_D4                  | |
 | GPIO39 | ADC_LINE(3)            | ADC_LINE(3)         | ADC_LINE(3)         | CAMERA_D5                  | |
 
+</center>
+
 @note
 - SPI_DEV(0) uses the HSPI interface with the GPIO2 pin as the MISO signal.
   Since GPIO2 has bootstrapping functionality, it might be necessary to to

cpu/esp32/doc.txt

@@ -81,6 +81,8 @@ ESP-IDF SDK.
 The following table gives a short reference of all board configuration parameters used by the ESP32
 port in alphabetical order.
 
+<center>
+
 Parameter                               | Short Description                                                 | Type*
 ----------------------------------------|-------------------------------------------------------------------|------
 [ADC_GPIOS](#esp32_adc_channels)        | GPIOs that can be used as ADC channels                            | m
@@ -110,12 +112,15 @@ Parameter                               | Short Description
 [UART2_TXD](#esp32_uart_interfaces)     | GPIO used as TxD for UART_DEV(2)                                  | o
 [UART2_RXD](#esp32_uart_interfaces)     | GPIO used as RxD for UART_DEV(2)                                  | o
 
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+
 **Type:* m - mandatory, o - optional
 
 The following table gives a short reference  in alphabetical order of modules
 that can be enabled/disabled by board configurations and/or application's
 makefile using `USEMODULE` and `DISABLE_MODULE`.
 
+<center>
 
 Module                                              | Default   | Short description
 ----------------------------------------------------|-----------|-------------------
@@ -135,6 +140,8 @@ Module                                              | Default   | Short descript
 [esp_wifi_ap](#esp32_wifi_ap_network_interface)     | not used  | enable the WiFi SoftAP network device
 [esp_wifi_enterprise](#esp32_wifi_network_interface)| not used  | enable the Wifi network device in WPA2 enterprise mode
 
+</center>
+
 
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