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esp8266/machine_pin: Disable open drain when pin becomes input/output.

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Otherwise the pin stays in open drain mode.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George 2022-11-15 12:44:29 +11:00
parent 96a2cc5e13
commit d9bca305e5
1 changed files with 12 additions and 3 deletions
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15
ports/esp8266/machine_pin.c
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@ -46,6 +46,16 @@
(GPIO_REG_READ(GPIO_PIN_ADDR(phys_port)) & ~GPIO_PIN_INT_TYPE_MASK) \
| GPIO_PIN_INT_TYPE_SET(trig))) \
#define ENABLE_OPEN_DRAIN(phys_port) \
(GPIO_REG_WRITE(GPIO_PIN_ADDR(GPIO_ID_PIN(phys_port)), \
GPIO_REG_READ(GPIO_PIN_ADDR(GPIO_ID_PIN(phys_port))) \
| GPIO_PIN_PAD_DRIVER_SET(GPIO_PAD_DRIVER_ENABLE)))
#define DISABLE_OPEN_DRAIN(phys_port) \
(GPIO_REG_WRITE(GPIO_PIN_ADDR(GPIO_ID_PIN(phys_port)), \
GPIO_REG_READ(GPIO_PIN_ADDR(GPIO_ID_PIN(phys_port))) \
& ~GPIO_PIN_PAD_DRIVER_SET(GPIO_PAD_DRIVER_ENABLE))) \
typedef struct _pin_irq_obj_t {
mp_obj_base_t base;
uint16_t phys_port;
@ -165,9 +175,7 @@ void mp_hal_pin_open_drain(mp_hal_pin_obj_t pin_id) {
ETS_GPIO_INTR_DISABLE();
PIN_FUNC_SELECT(pin->periph, pin->func);
GPIO_REG_WRITE(GPIO_PIN_ADDR(GPIO_ID_PIN(pin->phys_port)),
GPIO_REG_READ(GPIO_PIN_ADDR(GPIO_ID_PIN(pin->phys_port)))
| GPIO_PIN_PAD_DRIVER_SET(GPIO_PAD_DRIVER_ENABLE)); // open drain
ENABLE_OPEN_DRAIN(pin->phys_port);
GPIO_REG_WRITE(GPIO_ENABLE_ADDRESS,
GPIO_REG_READ(GPIO_ENABLE_ADDRESS) | (1 << pin->phys_port));
ETS_GPIO_INTR_ENABLE();
@ -271,6 +279,7 @@ STATIC mp_obj_t pyb_pin_obj_init_helper(pyb_pin_obj_t *self, size_t n_args, cons
mp_raise_ValueError(MP_ERROR_TEXT("Pin(16) doesn't support pull"));
}
} else {
DISABLE_OPEN_DRAIN(self->phys_port);
PIN_FUNC_SELECT(self->periph, self->func);
#if 0
// Removed in SDK 1.1.0