Changes between Version 4 and Version 5 of FreeRunnerLEDs

Timestamp:

2009-11-18T21:06:04Z (15 years ago)

Author:

Jiri Svoboda

Comment:

On vs. off

FreeRunnerLEDs

@@ -21 +21 @@
 '''Register descriptions:'''
  * GPBCON: Two configuration bits per pin (GPBCON![1:0] for GPB0, GPBCON![3:2] for GPB1, etc.), 00 = Input, 01 = Output, 10 = XXX, 11 = reserved. XXX refers to internal signals, different for each pin.
- * GPBDAT![10:0]: Obvious, write GPB10..GPB0 in output mode and read GPB10..GPB0 in input mode.
+ * GPBDAT![10:0]: Write GPB10..GPB0 in output mode and read GPB10..GPB0 in input mode.
  * GPBDN![10:0]: 0 = pull-down enabled, 1 = pull-down disabled in GPB10..GPB0.
 
-For blinking LEDs, we select output mode (0b01) for GPB0..GPB2. Pull-down should be disabled. Then write to GPBDAT![0:2].
+For blinking LEDs, we select output mode (0b01) for GPB0..GPB2. Pull-down should be disabled. Then write to GPBDAT![0:2]. To turn the LED on, the pin must be driven high, to turn it off it must be driven low.
 
 '''References:'''
@@ -33 +33 @@
  * Not verified
  * From the documentation I've seen it is not clear whether the registers are sensitive to endianness and if so, what their endianness is.
+ * Could not find in datasheet whether H drive is coded as 1 or 0 (probably 1?)