Fix more code not matching comment in deadtime example

Author: usbalbin

examples/hrtim/deadtime.rs

@@ -49,29 +49,29 @@ fn main() -> ! {
     let prescaler = Pscl1;
 
     let gpioa = dp.GPIOA.split(&mut rcc);
-    let pin_a = gpioa.pa8; // D7 On nucleo-G474 - LI Blue-White
-    let pin_b = gpioa.pa9; // D8 On nucleo-G474 - HI Green
+    let pin_a = gpioa.pa8; // D7 On nucleo-G474
+    let pin_b = gpioa.pa9; // D8 On nucleo-G474
 
-    //        .               .               .               .
-    //        .  30%          .               .               .
-    //         ----           .               .----           .
-    //out1    |    |          .               |    |          .
-    //        |    |          .               |    |          .
-    // --------    ----------------------------    --------------------
-    //        .               .----           .               .----
-    //out2    .               |    |          .               |    |
-    //        .               |    |          .               |    |
-    // ------------------------    ----------------------------    ----
-    //        .               .               .               .
-    //        .               .               .               .
+    //        .               .               .
+    //        .duty           .               .
+    //         ----           .----           .
+    //out1    |    |          |    |          .
+    //        |    |          |    |          .
+    // --------    ------------    -----------.
+    //        .       ------          ------  .
+    //out2    .      |      |        |      | .
+    //        .      |      |        |      | .
+    // ---------------      ----------      --.
+    //        .   |<>|      |<>|              .
+    //        .   33ns      33ns              .
     let (hr_control, ..) = dp.HRTIM_COMMON.hr_control(&mut rcc).wait_for_calibration();
     let mut hr_control = hr_control.constrain();
 
     let deadtime = DeadtimeConfig::default()
         .prescaler(stm32_hrtim::deadtime::DeadtimePrescaler::ThrtimDiv8)
         .deadtime_rising_value(32) // 32 / (8 * 120MHz) = ~33.33ns
         .deadtime_falling_value(32); // 32 / (8 * 120MHz) = ~33.33ns
-    let period = 0xF00;
+    let period = 0xF00; // (120MHz * 32) / 0xF00 = 1MHz
     let HrParts {
         mut timer,
         mut cr1,
@@ -81,7 +81,7 @@ fn main() -> ! {
         .HRTIM_TIMA
         .pwm_advanced((pin_a, pin_b))
         .prescaler(prescaler)
-        .period(period) // (120MHz * 32) / 0xF00 = 1MHz
+        .period(period)
         .deadtime(deadtime)
         .out1_polarity(stm32_hrtim::Polarity::ActiveHigh)
         .out2_polarity(stm32_hrtim::Polarity::ActiveHigh)
@@ -98,7 +98,7 @@ fn main() -> ! {
     timer.start(&mut hr_control.control);
 
     loop {
-        // Step frequency from 14.6kHz to about 146kHz(half of that when only looking at one pin)
+        // Step duty cycle from 10% to 90%
         for i in 1..10 {
             let p = timer.get_period();
             info!("p: {}", p);