docs: Add documentation for probe_eddy_current

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 22 insertions, 0 deletions

diff --git a/docs/G-Codes.md b/docs/G-Codes.md
index 0b8aa6e5..e55fba35 100644
--- a/docs/G-Codes.md
+++ b/docs/G-Codes.md
@@ -984,6 +984,28 @@ babystepping), and subtract if from the probe's z_offset.  This acts
 to take a frequently used babystepping value, and "make it permanent".
 Requires a `SAVE_CONFIG` to take effect.
 
+### [probe_eddy_current]
+
+The following commands are available when a
+[probe_eddy_current config section](Config_Reference.md#probe_eddy_current)
+is enabled.
+
+#### PROBE_EDDY_CURRENT_CALIBRATE
+`PROBE_EDDY_CURRENT_CALIBRATE CHIP=<config_name>`: This starts a tool
+that calibrates the sensor resonance frequencies to corresponding Z
+heights. The tool will take a couple of minutes to complete. After
+completion, use the SAVE_CONFIG command to store the results in the
+printer.cfg file.
+
+#### LDC_CALIBRATE_DRIVE_CURRENT
+`LDC_CALIBRATE_DRIVE_CURRENT CHIP=<config_name>` This tool will
+calibrate the ldc1612 DRIVE_CURRENT0 register. Prior to using this
+tool, move the sensor so that it is near the center of the bed and
+about 20mm above the bed surface. Run this command to determine an
+appropriate DRIVE_CURRENT for the sensor. After running this command
+use the SAVE_CONFIG command to store that new setting in the
+printer.cfg config file.
+
 ### [pwm_cycle_time]
 
 The following command is available when a