angle: mt6826s added support

Signed-off-by: Timofey Titovets <nefelim4ag@gmail.com>

docs/Config_Reference.md

@@ -5040,7 +5040,8 @@ serial:
 ### [angle]
 
 Magnetic hall angle sensor support for reading stepper motor angle
-shaft measurements using a1333, as5047d, mt6816, or tle5012b SPI chips.
+shaft measurements using a1333, as5047d, mt6816, mt6826s,
+or tle5012b SPI chips.
 The measurements are available via the [API Server](API_Server.md) and
 [motion analysis tool](Debugging.md#motion-analysis-and-data-logging).
 See the [G-Code reference](G-Codes.md#angle) for available commands.
@@ -5049,7 +5050,7 @@ See the [G-Code reference](G-Codes.md#angle) for available commands.
 [angle my_angle_sensor]
 sensor_type:
 #   The type of the magnetic hall sensor chip. Available choices are
-#   "a1333", "as5047d", "mt6816", and "tle5012b". This parameter must be
+#   "a1333", "as5047d", "mt6816", "mt6826s", and "tle5012b". This parameter must be
 #   specified.
 #sample_period: 0.000400
 #   The query period (in seconds) to use during measurements. The

docs/G-Codes.md

@@ -127,6 +127,14 @@ use this tool the Python "numpy" package must be installed (see the
 [measuring resonance document](Measuring_Resonances.md#software-installation)
 for more information).
 
+#### ANGLE_CHIP_CALIBRATE
+`ANGLE_CHIP_CALIBRATE CHIP=<chip_name>`: Perform internal sensor calibration,
+if implemented (MT6826S/MT6835).
+
+- **MT68XX**: The motor should be disconnected
+from any printer carriage before performing calibration.
+After calibration, the sensor should be reset by disconnecting the power.
+
 #### ANGLE_DEBUG_READ
 `ANGLE_DEBUG_READ CHIP=<config_name> REG=<register>`: Queries sensor
 register "register" (e.g. 44 or 0x2C). Can be useful for debugging