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stm32/pin_defs_stm32: Fix pin printing to show IN mode correctly. 

Prior to this commit, if you configure a pin as an output type (I2C in this
example) and then later configure it back as an input, then it will report
the type incorrectly.  Example:

    >>> import machine
    >>> b6 = machine.Pin('B6')
    >>> b6
    Pin(Pin.cpu.B6, mode=Pin.IN)
    >>> machine.I2C(1)
    I2C(1, scl=B6, sda=B7, freq=420000)
    >>> b6
    Pin(Pin.cpu.B6, mode=Pin.ALT_OPEN_DRAIN, pull=Pin.PULL_UP, af=Pin.AF4_I2C1)
    >>> b6.init(machine.Pin.IN)
    >>> b6
    Pin(Pin.cpu.B6, mode=Pin.ALT_OPEN_DRAIN, af=Pin.AF4_I2C1)

With this commit the last print now works:

    >>> b6
    Pin(Pin.cpu.B6, mode=Pin.IN)
This commit is contained in:
Dave Hylands 2020-08-11 12:44:51 -07:00 committed by Damien George
parent e76c7466b6
commit 8727c4e2ec
1 changed files with 2 additions and 2 deletions
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4
ports/stm32/pin_defs_stm32.c
View File

@ -8,9 +8,9 @@
uint32_t pin_get_mode(const pin_obj_t *pin) {
GPIO_TypeDef *gpio = pin->gpio;
uint32_t mode = (gpio->MODER >> (pin->pin * 2)) & 3;
if (mode != GPIO_MODE_ANALOG) {
if (mode == GPIO_MODE_OUTPUT_PP || mode == GPIO_MODE_AF_PP) {
if (gpio->OTYPER & pin->pin_mask) {
mode |= 1 << 4;
mode |= 1 << 4; // Converts from xxx_PP to xxx_OD
}
}
return mode;