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Merge pull request #1915 from anpilog/master 

Fix pin mode for STM32F1 target.
pull/1961/head
Martin Kojtal 2016-06-16 15:22:16 +02:00 committed by GitHub
parent 42561b9193 9c0d45598e
commit 9836fedd33
1 changed files with 2 additions and 2 deletions
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4
hal/targets/hal/TARGET_STM/TARGET_STM32F1/pinmap.c
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@ -177,12 +177,12 @@ void pin_mode(PinName pin, PinMode mode)
if (pin_index < 8) {
if ((gpio->CRL & (0x03 << (pin_index * 4))) == 0) { // MODE bits = Input mode
gpio->CRL |= (0x08 << (pin_index * 4)); // Set pull-up / pull-down
gpio->CRL &= ~(0x08 << ((pin_index * 4)-1)); // ENSURES GPIOx_CRL.CNFx.bit0 = 0
gpio->CRL &= ~(0x04 << (pin_index * 4)); // ENSURES GPIOx_CRL.CNFx.bit0 = 0
}
} else {
if ((gpio->CRH & (0x03 << ((pin_index % 8) * 4))) == 0) { // MODE bits = Input mode
gpio->CRH |= (0x08 << ((pin_index % 8) * 4)); // Set pull-up / pull-down
gpio->CRH &= ~(0x08 << (((pin_index % 8) * 4)-1)); // ENSURES GPIOx_CRH.CNFx.bit0 = 0
gpio->CRH &= ~(0x04 << ((pin_index % 8) * 4)); // ENSURES GPIOx_CRH.CNFx.bit0 = 0
}
}
// Now it's time to setup properly if pullup or pulldown. This is done in ODR register: