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| author | Kevin O'Connor <kevin@koconnor.net> | 2019-08-20 13:32:14 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2019-08-20 19:39:49 -0400 |
| commit | e32be928dc042b61876384fac9ef2a225d10e929 (patch) | |
| tree | 260659bab600486cb42b9dfdeaa9a764f56744b2 /src/stm32/stm32f4.c | |
| parent | c930fc392b6977b17d6f7953bd738583974208c2 (diff) | |
| download | kutter-e32be928dc042b61876384fac9ef2a225d10e929.tar.gz kutter-e32be928dc042b61876384fac9ef2a225d10e929.tar.xz kutter-e32be928dc042b61876384fac9ef2a225d10e929.zip | |
stm32: Add support for configuring open drain output mode
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'src/stm32/stm32f4.c')
| -rw-r--r-- | src/stm32/stm32f4.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/stm32/stm32f4.c b/src/stm32/stm32f4.c index 5a09f2d6..9d40f34c 100644 --- a/src/stm32/stm32f4.c +++ b/src/stm32/stm32f4.c @@ -72,7 +72,7 @@ gpio_peripheral(uint32_t gpio, uint32_t mode, int pullup) gpio_clock_enable(regs); // Configure GPIO - uint32_t mode_bits = mode & 0x0f, func = mode >> 4; + uint32_t mode_bits = mode & 0xf, func = (mode >> 4) & 0xf, od = mode >> 8; uint32_t pup = pullup ? (pullup > 0 ? 1 : 2) : 0; uint32_t pos = gpio % 16, af_reg = pos / 8; uint32_t af_shift = (pos % 8) * 4, af_msk = 0x0f << af_shift; @@ -81,6 +81,7 @@ gpio_peripheral(uint32_t gpio, uint32_t mode, int pullup) regs->AFR[af_reg] = (regs->AFR[af_reg] & ~af_msk) | (func << af_shift); regs->MODER = (regs->MODER & ~m_msk) | (mode_bits << m_shift); regs->PUPDR = (regs->PUPDR & ~m_msk) | (pup << m_shift); + regs->OTYPER = (regs->OTYPER & ~(1 << pos)) | (od << pos); regs->OSPEEDR = (regs->OSPEEDR & ~m_msk) | (0x02 << m_shift); } |