kopia lustrzana https://github.com/micropython/micropython
72 wiersze
2.0 KiB
C
72 wiersze
2.0 KiB
C
#include <stdint.h>
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#include <mk20dx128.h>
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "pin.h"
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// Returns the pin mode. This value returned by this macro should be one of:
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// GPIO_MODE_INPUT, GPIO_MODE_OUTPUT_PP, GPIO_MODE_OUTPUT_OD,
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// GPIO_MODE_AF_PP, GPIO_MODE_AF_OD, or GPIO_MODE_ANALOG.
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uint32_t pin_get_mode(const pin_obj_t *pin) {
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if (pin->gpio == NULL) {
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// Analog only pin
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return GPIO_MODE_ANALOG;
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}
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volatile uint32_t *port_pcr = GPIO_PIN_TO_PORT_PCR(pin->gpio, pin->pin);
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uint32_t pcr = *port_pcr;
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uint32_t af = (pcr & PORT_PCR_MUX_MASK) >> 8;
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if (af == 0) {
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return GPIO_MODE_ANALOG;
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}
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if (af == 1) {
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if (pin->gpio->PDDR & (1 << pin->pin)) {
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if (pcr & PORT_PCR_ODE) {
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return GPIO_MODE_OUTPUT_OD;
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}
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return GPIO_MODE_OUTPUT_PP;
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}
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return GPIO_MODE_INPUT;
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}
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if (pcr & PORT_PCR_ODE) {
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return GPIO_MODE_AF_OD;
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}
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return GPIO_MODE_AF_PP;
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}
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// Returns the pin pullup/pulldown. The value returned by this macro should
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// be one of GPIO_NOPULL, GPIO_PULLUP, or GPIO_PULLDOWN.
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uint32_t pin_get_pull(const pin_obj_t *pin) {
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if (pin->gpio == NULL) {
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// Analog only pin
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return GPIO_NOPULL;
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}
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volatile uint32_t *port_pcr = GPIO_PIN_TO_PORT_PCR(pin->gpio, pin->pin);
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uint32_t pcr = *port_pcr;
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uint32_t af = (pcr & PORT_PCR_MUX_MASK) >> 8;
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// pull is only valid for digital modes (hence the af > 0 test)
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if (af > 0 && (pcr & PORT_PCR_PE) != 0) {
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if (pcr & PORT_PCR_PS) {
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return GPIO_PULLUP;
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}
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return GPIO_PULLDOWN;
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}
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return GPIO_NOPULL;
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}
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// Returns the af (alternate function) index currently set for a pin.
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uint32_t pin_get_af(const pin_obj_t *pin) {
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if (pin->gpio == NULL) {
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// Analog only pin
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return 0;
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}
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volatile uint32_t *port_pcr = GPIO_PIN_TO_PORT_PCR(pin->gpio, pin->pin);
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return (*port_pcr & PORT_PCR_MUX_MASK) >> 8;
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}
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