search for C files indep of pythonpath

example_pwm.py

@@ -8,10 +8,13 @@
 
 # optimum settings to control a small servo (190 Hz) 
 # typically the timing range is 0.8 .. 2.2 ms pulse width, but YMMV
-gpio = 0
-rp.pwm_configure_pair(gpio=gpio, wrap_value=65535, clkdiv=20, clkdiv_int_frac=0)
+
+rp.pwm_configure_pair(gpio=14, wrap_value=65535, clkdiv=50, clkdiv_int_frac=0)
+#rp.pwm_set_value(gpio=14, value=65534) # minimum position
+rp.pwm_set_value(gpio=14, value=0) # minimum position
+
+gpio = 15
+rp.pwm_configure_pair(gpio=gpio, wrap_value=65535, clkdiv=50, clkdiv_int_frac=0)
 rp.pwm_set_value(gpio=gpio, value=100) # minimum position
-time.sleep(1)
-rp.pwm_set_value(gpio=gpio, value=27500) # maximum position
 
 

rp2daq.c

@@ -151,7 +151,7 @@ int main() {  // CPU core0 can be fully occupied with USB communication
     bi_decl(bi_program_url("https://github.com/FilipDominec/rp2daq"));
     bi_decl(bi_1pin_with_name(PICO_DEFAULT_LED_PIN, "Diagnostic LED, other pins assigned run-time"));
 
-    set_sys_clock_khz(250000, false); // reasonable overclock with safe margin
+    //set_sys_clock_khz(250000, false); // reasonable overclock with safe margin
 	// TODO check freq accuracy, set 'true' ? Seems a bit off, us_timer ticking 1% faster.
     stdio_set_translate_crlf(&stdio_usb, false); // crucial for correct binary data transmission
     stdio_init_all();