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Revert "Fix setting alternate port functions on the STM32F4."

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This was also fixed in ac29b654a992a4855626fc0b92874d3847914f85 in a
different way. I think the mask definition should be left with 1s
indicating the bits of interest.

This reverts commit e11185d47d0a2fea6d2782761edd5fd489541512.
This commit is contained in:
Fergus Noble 2012-03-21 20:16:10 -07:00
parent 26de4cb9d6
commit 87ea496ca7
1 changed files with 1 additions and 1 deletions
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include/libopencm3/stm32/f4/gpio.h
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@ -232,7 +232,7 @@
/* See Datasheet Table 6 (pg. 48) for alternate function mappings. */
#define GPIO_AFR(n, af) (af << ((n) * 4))
#define GPIO_AFR_MASK(n) ~(0xf << ((n) * 4))
#define GPIO_AFR_MASK(n) (0xf << ((n) * 4))
#define GPIO_AF0 0x0
#define GPIO_AF1 0x1
#define GPIO_AF2 0x2