bare6_2

examples/bare6.rs

@@ -137,15 +137,16 @@ fn clock_out(rcc: &RCC, gpioc: &GPIOC) {
 //
 //    What is the frequency of MCO2 read by the oscilloscope?
 //
-//    ** your answer here **
+//    ** 4.00 MHz. **
 //
 //    Compute the value of SYSCLK based on the oscilloscope reading
 //
-//    ** your answer here **
+//    ** MCO2 reads 4 MHz, MCO2 is set to take SYSCLK (0b00) and scale
+//    it down by 4 (0b110 in MCO2PRE bits). This makes SYSCLK 16 MHz. **
 //
 //    What is the peak to peak reading of the signal?
 //
-//    ** your answer here **
+//    ** Disregarding ringing, 325 mVpp. With ringing, 775 mVpp. **
 //
 //    Make a folder called "pictures" in your git project.
 //    Make a screen dump or photo of the oscilloscope output.