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stm32: Add support for configuring open drain output mode

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-08-20 13:32:14 -04:00
parent c930fc392b
commit e32be928dc
3 changed files with 9 additions and 2 deletions
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7
src/stm32/stm32f1.c
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@ -75,10 +75,15 @@ gpio_peripheral(uint32_t gpio, uint32_t mode, int pullup)
cfg = pullup ? 0x8 : 0x4;
} else if (mode == GPIO_OUTPUT) {
cfg = 0x1;
} else if (mode == (GPIO_OUTPUT | GPIO_OPEN_DRAIN)) {
cfg = 0x5;
} else if (mode == GPIO_ANALOG) {
cfg = 0x0;
} else {
if (pullup > 0)
if (mode & GPIO_OPEN_DRAIN)
// Alternate function with open-drain mode
cfg = 0xd;
else if (pullup > 0)
// Alternate function input pins use GPIO_INPUT mode on the stm32f1
cfg = 0x8;
else