try to fix submodule

firmware/lib/Arduino-FOC-drivers/src/encoders/tle5012b/README.md

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+# SimpleFOC Driver for TLE5012B encoder for STM32 MCUs
+
+This driver code is compatible with STM32 MCUs. Based loosely on code from [here](https://github.com/xerootg/btt-s42b-simplefoc), with many thanks to @xerootg
+
+## Hardware setup
+
+Connect the data pin of the sensor to the MOSI (COPI) line of the MCU. The SCLK and nCS lines are connected as normal.
+
+## Software setup
+
+Sample code:
+
+```
+#include <Arduino.h>
+#include <SimpleFOC.h>
+#include <SimpleFOCDrivers.h>
+#include "encoders/tle5012b/MagneticSensorTLE5012B.h"
+
+MagneticSensorTLE5012B sensor(PB15,PB13,PB12);
+
+long ts;
+
+void setup() {
+  Serial.begin(115200);
+  while (!Serial) ;
+  delay(2000);
+
+  Serial.println("Initializing sensor...");
+
+  sensor.init();
+
+  Serial.println("Sensor initialized.");
+
+  ts = millis();
+}
+
+void loop() {
+  sensor.update();
+  if (millis() - ts > 1000) {
+    Serial.println(sensor.getAngle(), 3);
+    ts = millis();
+  }
+  delay(1);
+}
+```
+
+## Other MCUs
+
+Infineon provides a driver library compatible with Atmel AVR (Arduino UNO, Nano, etc...) and Infineon XMC MCUs. If you have one of those MCUs, you can use this library in conjunction with the GenericSensor class in SimpleFOC.
+
+```
+#include <SimpleFOC.h>
+#include <TLE5012-ino.hpp>
+
+Tle5012Ino Tle5012Sensor = Tle5012Ino();
+errorTypes checkError = NO_ERROR;
+
+float readMySensor(){
+ // read my sensor
+ // return the angle value in radians in between 0 and 2PI
+ 
+    Tle5012Sensor.getAngleValue(d);
+    d = (d + 180);
+    if ( d + 40.9 > 360 ) {
+        d = (d + 40.9) - 360;
+    }
+    else
+        d = d + 40.9;
+
+    d = d * 0.0174533;
+    return d;
+}
+void initMySensor(){
+  // do the init
+   checkError = Tle5012Sensor.begin();
+}
+
+// empty constructor 
+GenericSensor sensor = GenericSensor(readMySensor, initMySensor);
+
+void setup(){
+...
+  //init sensor and use it further with foc...
+  sensor.init();
+...
+}
+```
+
+Other MCUs are currently not supported. The problem is that the sensor uses SPI in half-duplex mode, which is not supported by Arduino framework. So for each MCU type a custom driver has to be written to get the half-duplex SPI communication to work. There are currently no plans to support other MCUs on our side, but we will gladly accept pull requests :-)
+
+If you can find other libraries for other MCUs, you can use the GenericSensor approach to integrate them.