Slightly clearer formula for interrupt config register position

cmaglie · cmaglie · commit 9d9fe5c0979c · 2017-09-08T16:55:33.000+02:00
diff --git a/cores/arduino/WInterrupts.c b/cores/arduino/WInterrupts.c
@@ -106,12 +106,13 @@ void attachInterrupt(uint32_t pin, voidFuncPtr callback, uint32_t mode)
     // Look for right CONFIG register to be addressed
     if (in > EXTERNAL_INT_7) {
       config = 1;
+      pos = (in - 8) << 2;
     } else {
       config = 0;
+      pos = in << 2;
     }
 
     // Configure the interrupt mode
-    pos = (in - (8 * config)) << 2;
     EIC->CONFIG[config].reg &=~ (EIC_CONFIG_SENSE0_Msk << pos); // Reset sense mode, important when changing trigger mode during runtime
     switch (mode)
     {

Original file line number	Diff line number	Diff line change
`@@ -106,12 +106,13 @@ void attachInterrupt(uint32_t pin, voidFuncPtr callback, uint32_t mode)`
`106`	`106`	`// Look for right CONFIG register to be addressed`
`107`	`107`	`if (in > EXTERNAL_INT_7) {`
`108`	`108`	`config = 1;`
	`109`	`+ pos = (in - 8) << 2;`
`109`	`110`	`} else {`
`110`	`111`	`config = 0;`
	`112`	`+ pos = in << 2;`
`111`	`113`	`}`
`112`	`114`
`113`	`115`	`// Configure the interrupt mode`
`114`		`- pos = (in - (8 * config)) << 2;`
`115`	`116`	`EIC->CONFIG[config].reg &=~ (EIC_CONFIG_SENSE0_Msk << pos); // Reset sense mode, important when changing trigger mode during runtime`
`116`	`117`	`switch (mode)`
`117`	`118`	`{`