calculate the ips based on the magnetic field strength

Cargo.lock

@@ -277,6 +277,7 @@ dependencies = [
  "embedded-graphics",
  "embedded-hal-bus",
  "heapless 0.9.2",
+ "libm",
  "log",
  "mipidsi",
  "mmc56x3",
@@ -829,6 +830,12 @@ version = "0.2.180"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bcc35a38544a891a5f7c865aca548a982ccb3b8650a5b06d0fd33a10283c56fc"
 
+[[package]]
+name = "libm"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
+
 [[package]]
 name = "litrs"
 version = "1.0.0"