diff --git a/rtl/library/adc_driver.v b/rtl/library/adc_driver.v
index 685dbda..5a67609 100644
--- a/rtl/library/adc_driver.v
+++ b/rtl/library/adc_driver.v
@@ -1,7 +1,10 @@
 // driver for the MAX1141 ADC used in the board
 // it has 4 analog inputs, and is configured to automatically
 // scan them sequentially while being driven by SCK
-// it uses 
+// it divides the input clock by 16 to produce the SPI clock
+
+// it writes one configuration word to the ADC and then constantly
+// polls it for new data
 module adc_driver(
   input clk,
   input rstn,
@@ -25,9 +28,9 @@ assign channel = channel_ff;
 assign val = adc_val_ff;
 assign vld = new & ~ack;
 
-reg [1:0] sck_strobe = 0;
-wire strobe = &sck_strobe;
-wire strobe2 = &(sck_strobe^2'b10);
+reg sck_strobe = 0;
+wire strobe = sck_strobe;
+wire strobe2 = ~sck_strobe;
 
 always @(posedge clk) begin
   if (rstn)