Clean up the template header a bit

Closes #8

inc/timdac_config_template_ch32v103.h

@@ -9,11 +9,14 @@
 // ----------------------------------------------------------------------------
 // MAIN DRIVER CONFIGURATION
 
+// Timer base frequency in Hz
 #define TIMDAC_TIMERFREQ_HZ       72000000
 
+// How many channels are present, up to 254
 #define TIMDAC_N_CHANNELS         4
 
-#define TIMDAC_DIAGNOSTIC         1
+// Whether special diagnostic functions should be compiled in
+#define TIMDAC_DIAGNOSTIC         0
 
 // Include the reference design hardware parameters here:
 #include "timdac_config_ref1p0.h"
@@ -69,6 +72,6 @@
 
 // OPTIONAL GPIO <<port, pin>>: ISR profiler. Goes high when executing the ISR.
 // For debugging/development.
-#define TIMDAC_HW_GPIO_PROFILE    GPIOB, GPIO_Pin_2
+//#define TIMDAC_HW_GPIO_PROFILE    GPIOB, GPIO_Pin_2
 
 #endif // !defined(TIMDAC_CONFIG_H)