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STM32: gpio SPEED - always set High Speed by default #3840

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Merged
merged 1 commit into from
Mar 6, 2017
Merged

STM32: gpio SPEED - always set High Speed by default #3840

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11 changes: 10 additions & 1 deletion targets/TARGET_STM/pinmap.c
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Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,16 @@ void pin_function(PinName pin, int data)
// Enable GPIO clock
GPIO_TypeDef *gpio = Set_GPIO_Clock(port);

/* Set default speed to high.
* This is done before other settings on purpose:
* For most families there are dedicated registers so it is
* not so important, register can be set at any time.
* But for families like F1, speed only applies to output. so we set
* it here, and then if input is selected, this setting might be
* overriden by the input one.
*/
LL_GPIO_SetPinSpeed(gpio, ll_pin, LL_GPIO_SPEED_FREQ_HIGH);

switch (mode) {
case STM_PIN_INPUT:
ll_mode = LL_GPIO_MODE_INPUT;
Expand Down Expand Up @@ -103,7 +113,6 @@ void pin_function(PinName pin, int data)

/* For now by default use Speed HIGH for output or alt modes */
if ((mode == STM_PIN_OUTPUT) ||(mode == STM_PIN_ALTERNATE)) {
LL_GPIO_SetPinSpeed(gpio, ll_pin, LL_GPIO_SPEED_FREQ_HIGH);
if (STM_PIN_OD(data)) {
LL_GPIO_SetPinOutputType(gpio, ll_pin, LL_GPIO_OUTPUT_OPENDRAIN);
} else {
Expand Down