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Update configuration.md - SD_SPI_SPEED, Displays #587

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Update configuration.md - SD_SPI_SPEED, Displays #587

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Update configuration.md
classicrocker883 Nov 2, 2024
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Update configuration.md, SD_SPI_SPEED
classicrocker883 Nov 2, 2024
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add spaces to separate lines
classicrocker883 Nov 2, 2024
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Update configuration.md
classicrocker883 Nov 2, 2024
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add MARLIN_SMALL_BUILD POSTMORTEM_DEBUGGING
classicrocker883 Nov 2, 2024
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27 changes: 22 additions & 5 deletions _configuration/configuration.md
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Original file line number Diff line number Diff line change
Expand Up @@ -1858,13 +1858,15 @@ Enable to use SD printing, whether as part of an LCD controller or as a standalo
The `SDSUPPORT` option must be enabled or SD printing will not be supported. It is no longer enabled automatically for LCD controllers with built-in SDCard slot.
{% endalert %}

### SPI Speed
### SD SPI Speed
```cpp
//#define SPI_SPEED SPI_HALF_SPEED
//#define SPI_SPEED SPI_QUARTER_SPEED
//#define SPI_SPEED SPI_EIGHTH_SPEED
//#define SD_SPI_SPEED SPI_HALF_SPEED
```
Uncomment ONE of these options to use a slower SPI transfer speed. This is usually required if you're getting volume init errors.
Uncomment to enable and set ONE of these options to use a slower SPI transfer speed, otherwise full speed will be applied:
- `SPI_HALF_SPEED`
- `SPI_QUARTER_SPEED`
- `SPI_EIGHTH_SPEED`
This is usually required if you're getting volume init errors.

### Enable CRC
```cpp
Expand Down Expand Up @@ -1945,6 +1947,7 @@ Marlin includes support for several controllers. The two most popular controller
Most other LCD controllers are variants of these. Enable just one of the following options for your specific controller:

### Character LCDs

Option|Description
------|-----------
`ULTIMAKERCONTROLLER`|The original Ultimaker Controller.
Expand All @@ -1956,6 +1959,7 @@ Option|Description
`ANET_KEYPAD_LCD`|[Anet Keypad LCD](//www.anet3d.com/prod_view.aspx?TypeId=10&Id=178) for the Anet A3

### Graphical LCDs

Option|Description
------|-----------
`CARTESIO_UI`|[Cartesio UI](//mauk.cc/webshop/cartesio-shop/electronics/user-interface).
Expand All @@ -1970,6 +1974,7 @@ Option|Description
`ANET_FULL_GRAPHICS_LCD`|[Anet Full Graphics LCD](//www.anet3d.com/prod_view.aspx?TypeId=10&Id=178) for the Anet A3

### Keypads

Option|Description
------|-----------
`REPRAPWORLD_KEYPAD`|[RepRapWorld Keypad v1.1](//reprapworld.com/?products_details&products_id=202&cPath=1591_1626) Use `REPRAPWORLD_KEYPAD_MOVE_STEP` to set how much the robot should move on each keypress (_e.g.,_ 10mm per click).
Expand Down Expand Up @@ -4471,3 +4476,15 @@ Display pin status, toggle pins, watch pins, watch endstops & toggle LED, test s
//#define MARLIN_DEV_MODE
```
Enable Marlin dev mode which adds some special commands.

#### Enable Postmortem Debugging
```cpp
//#define POSTMORTEM_DEBUGGING
```
Captures misbehavior and outputs the CPU status and backtrace to serial. When running in the debugger it will break for debugging. This is useful to help understand a crash from a remote location.

#### Enable Marlin Small Build
```cpp
//#define MARLIN_SMALL_BUILD
```
Shrink the build for smaller boards by sacrificing some serial feedback.
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