bare7_2

examples/bare7.rs

@@ -33,7 +33,9 @@ fn main() -> ! {
     let rcc = p.RCC.constrain();
 
     // 16 MHz (default, all clocks)
-    let clocks = rcc.cfgr.freeze();
+    // let clocks = rcc.cfgr.freeze();
+    let clocks = rcc.cfgr.sysclk(84.mhz()).hclk(84.mhz()).pclk1(42.mhz()).pclk2(64.mhz()).freeze();
+
 
     let gpioa = p.GPIOA.split();
 
@@ -49,6 +51,9 @@ fn main() -> ! {
     )
     .unwrap();
 
+    let gpioc = p.GPIOC.split();
+    gpioc.pc9.into_alternate_af0().set_speed(hal::gpio::Speed::VeryHigh);
+
     // Separate out the sender and receiver of the serial port
     let (mut tx, mut rx) = serial.split();
 
@@ -145,15 +150,15 @@ fn main() -> ! {
 //
 //    What is the frequency of MCO2 read by the oscilloscope.
 //
-//    ** your answer here **
+//    85 MHz
 //
 //    Compute the value of SYSCLK based on the oscilloscope reading.
 //
-//    ** your answer here **
+//    Sysclk was set to 84 MHz
 //
 //    What is the peak to peak reading of the signal.
 //
-//    ** your answer here **
+//    7.8 V
 //
 //    Make a screen dump or photo of the oscilloscope output.
 //    Save the the picture as "bare_6_84mhz_high_speed"