🔧 Minor INPUT_SHAPING config fixes (MarlinFirmware#26882)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Author: Sophist-UK

Marlin/Configuration_adv.h

@@ -1204,14 +1204,14 @@
 //#define INPUT_SHAPING_Y
 #if ANY(INPUT_SHAPING_X, INPUT_SHAPING_Y)
   #if ENABLED(INPUT_SHAPING_X)
-    #define SHAPING_FREQ_X  40          // (Hz) The default dominant resonant frequency on the X axis.
-    #define SHAPING_ZETA_X  0.15f       // Damping ratio of the X axis (range: 0.0 = no damping to 1.0 = critical damping).
+    #define SHAPING_FREQ_X  40.0        // (Hz) The default dominant resonant frequency on the X axis.
+    #define SHAPING_ZETA_X   0.15       // Damping ratio of the X axis (range: 0.0 = no damping to 1.0 = critical damping).
   #endif
   #if ENABLED(INPUT_SHAPING_Y)
-    #define SHAPING_FREQ_Y  40          // (Hz) The default dominant resonant frequency on the Y axis.
-    #define SHAPING_ZETA_Y  0.15f       // Damping ratio of the Y axis (range: 0.0 = no damping to 1.0 = critical damping).
+    #define SHAPING_FREQ_Y  40.0        // (Hz) The default dominant resonant frequency on the Y axis.
+    #define SHAPING_ZETA_Y   0.15       // Damping ratio of the Y axis (range: 0.0 = no damping to 1.0 = critical damping).
   #endif
-  //#define SHAPING_MIN_FREQ  20        // By default the minimum of the shaping frequencies. Override to affect SRAM usage.
+  //#define SHAPING_MIN_FREQ  20.0      // (Hz) By default the minimum of the shaping frequencies. Override to affect SRAM usage.
   //#define SHAPING_MAX_STEPRATE 10000  // By default the maximum total step rate of the shaped axes. Override to affect SRAM usage.
   //#define SHAPING_MENU                // Add a menu to the LCD to set shaping parameters.
 #endif

Marlin/src/module/stepper.h

@@ -159,10 +159,10 @@ constexpr ena_mask_t enable_overlap[] = {
   #endif
 
   #ifndef SHAPING_MIN_FREQ
-    #define SHAPING_MIN_FREQ _MIN(0x7FFFFFFFL OPTARG(INPUT_SHAPING_X, SHAPING_FREQ_X) OPTARG(INPUT_SHAPING_Y, SHAPING_FREQ_Y))
+    #define SHAPING_MIN_FREQ _MIN(__FLT_MAX__ OPTARG(INPUT_SHAPING_X, SHAPING_FREQ_X) OPTARG(INPUT_SHAPING_Y, SHAPING_FREQ_Y))
   #endif
-  constexpr uint16_t shaping_min_freq = SHAPING_MIN_FREQ,
-                     shaping_echoes = max_step_rate / shaping_min_freq / 2 + 3;
+  constexpr float shaping_min_freq = SHAPING_MIN_FREQ;
+  constexpr uint16_t shaping_echoes = FLOOR(max_step_rate / shaping_min_freq / 2) + 3;
 
   typedef hal_timer_t shaping_time_t;
   enum shaping_echo_t { ECHO_NONE = 0, ECHO_FWD = 1, ECHO_BWD = 2 };