Correct NO_TIMER index value for SAMD21.

tannewt · tannewt · commit c37ade9aeba3 · 2018-03-13T12:44:00.000-07:00
We check validity by ensuring it's lower than the total number of timers. 0 is a terrible number for the NO_TIMER value because its valid even though it shouldn't be. Fixes adafruit/Adafruit_CircuitPython_SimpleIO#29
diff --git a/ports/atmel-samd/samd21_pins.c b/ports/atmel-samd/samd21_pins.c
@@ -57,7 +57,7 @@
   .wave_output = p_wave_output \
 }
 
-#define NO_TIMER TCC(0, 0)
+#define NO_TIMER TCC(0xff, 0)
 
 #define TOUCH(y_line) \
     .has_touch = true, \

Original file line number	Diff line number	Diff line change
`@@ -57,7 +57,7 @@`
`57`	`57`	`.wave_output = p_wave_output \`
`58`	`58`	`}`
`59`	`59`
`60`		`-#define NO_TIMER TCC(0, 0)`
	`60`	`+#define NO_TIMER TCC(0xff, 0)`
`61`	`61`
`62`	`62`	`#define TOUCH(y_line) \`
`63`	`63`	`.has_touch = true, \`