Fix FAST_PWM_FAN / TouchUI with NO_MOTION_BEFORE_HOMING (MarlinFirmwa…

…re#25005)

Fix regressions from MarlinFirmware#20323, MarlinFirmware#23463

Marlin/src/HAL/AVR/fast_pwm.cpp

@@ -146,11 +146,11 @@ void MarlinHAL::set_pwm_frequency(const pin_t pin, const uint16_t f_desired) {
  LIMIT(res_pc_temp, 1U, maxtop);
 
  // Calculate frequencies of test prescaler and resolution values
- const uint32_t f_diff  = _MAX(f, f_desired) - _MIN(f, f_desired),
-  f_fast_temp = (F_CPU) / (p * (1 + res_fast_temp)),
-  f_fast_diff = _MAX(f_fast_temp, f_desired) - _MIN(f_fast_temp, f_desired),
-  f_pc_temp  = (F_CPU) / (2 * p * res_pc_temp),
-  f_pc_diff  = _MAX(f_pc_temp, f_desired) - _MIN(f_pc_temp, f_desired);
+ const int f_diff = ABS(f - int(f_desired)),
+ f_fast_temp = (F_CPU) / (p * (1 + res_fast_temp)),
+ f_fast_diff = ABS(f_fast_temp - int(f_desired)),
+ f_pc_temp = (F_CPU) / (2 * p * res_pc_temp),
+ f_pc_diff = ABS(f_pc_temp - int(f_desired));
 
  if (f_fast_diff < f_diff && f_fast_diff <= f_pc_diff) { // FAST values are closest to desired f
  // Set the Wave Generation Mode to FAST PWM

Marlin/src/lcd/extui/ui_api.cpp

@@ -375,9 +375,9 @@ namespace ExtUI {
  bool canMove(const axis_t axis) {
  switch (axis) {
  #if IS_KINEMATIC || ENABLED(NO_MOTION_BEFORE_HOMING)
- case X: return axis_should_home(X_AXIS);
- OPTCODE(HAS_Y_AXIS, case Y: return axis_should_home(Y_AXIS))
- OPTCODE(HAS_Z_AXIS, case Z: return axis_should_home(Z_AXIS))
+ case X: return !axis_should_home(X_AXIS);
+ OPTCODE(HAS_Y_AXIS, case Y: return !axis_should_home(Y_AXIS))
+ OPTCODE(HAS_Z_AXIS, case Z: return !axis_should_home(Z_AXIS))
  #else
  case X: case Y: case Z: return true;
  #endif