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mimxrt/machine_pin: Extend pin configuration functions.

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Add portable pin config macros to mphalport.h.  And add a function to
configure pins with more pin options such as alt function, pull, speed,
drive, interrupt mode, etc.

Note: this new `machine_pin_config()` function can replace
`machine_pin_set_mode()`, but the latter is left as-is to avoid breaking
anything.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>
This commit is contained in:
iabdalkader 2023-05-02 12:34:12 +02:00 committed by Damien George
parent 313068a5b3
commit 6b407d5600
3 changed files with 82 additions and 0 deletions
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54
ports/mimxrt/machine_pin.c
View File

@ -187,6 +187,60 @@ void machine_pin_set_mode(const machine_pin_obj_t *self, uint8_t mode) {
GPIO_PinInit(self->gpio, self->pin, &pin_config);
}
void machine_pin_config(const machine_pin_obj_t *self, uint8_t mode,
uint8_t pull, uint8_t drive, uint8_t speed, uint8_t alt) {
(void)speed;
gpio_pin_config_t pin_config = {0};
if (IS_GPIO_IT_MODE(mode)) {
if (mode == PIN_MODE_IT_FALLING) {
pin_config.interruptMode = kGPIO_IntFallingEdge;
} else if (mode == PIN_MODE_IT_RISING) {
pin_config.interruptMode = kGPIO_IntRisingEdge;
} else if (mode == PIN_MODE_IT_BOTH) {
pin_config.interruptMode = kGPIO_IntRisingOrFallingEdge;
}
// Set pad config mode to input.
mode = PIN_MODE_IN;
}
if (mode == PIN_MODE_IN) {
pin_config.direction = kGPIO_DigitalInput;
} else {
pin_config.direction = kGPIO_DigitalOutput;
}
if (mode != PIN_MODE_ALT) {
// GPIO is always ALT5
alt = PIN_AF_MODE_ALT5;
}
const machine_pin_af_obj_t *af = pin_find_af(self, alt);
if (af == NULL) {
return;
}
// Configure the pad.
uint32_t pad_config = pin_generate_config(pull, mode, drive, self->configRegister);
IOMUXC_SetPinMux(self->muxRegister, alt, af->input_register, af->input_daisy, self->configRegister, 0U);
IOMUXC_SetPinConfig(self->muxRegister, alt, af->input_register, af->input_daisy, self->configRegister, pad_config);
// Initialize the pin.
GPIO_PinInit(self->gpio, self->pin, &pin_config);
// Configure interrupt (if enabled).
if (pin_config.interruptMode != kGPIO_NoIntmode) {
uint32_t gpio_nr = GPIO_get_instance(self->gpio);
uint32_t irq_num = self->pin < 16 ? GPIO_combined_low_irqs[gpio_nr] : GPIO_combined_high_irqs[gpio_nr];
GPIO_PortEnableInterrupts(self->gpio, 1U << self->pin);
GPIO_PortClearInterruptFlags(self->gpio, ~0);
NVIC_SetPriority(irq_num, IRQ_PRI_EXTINT);
EnableIRQ(irq_num);
}
}
STATIC mp_obj_t machine_pin_obj_call(mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 0, 1, false);
machine_pin_obj_t *self = self_in;

19
ports/mimxrt/mphalport.h
View File

@ -38,6 +38,25 @@
#define MICROPY_HW_USB_CDC_TX_TIMEOUT (500)
#define MP_HAL_PIN_FMT "%q"
#define MP_HAL_PIN_MODE_INPUT PIN_MODE_IN
#define MP_HAL_PIN_MODE_OUTPUT PIN_MODE_OUT
#define MP_HAL_PIN_MODE_ALT PIN_MODE_ALT
#define MP_HAL_PIN_MODE_OPEN_DRAIN PIN_MODE_OPEN_DRAIN
#define MP_HAL_PIN_PULL_NONE PIN_PULL_DISABLED
#define MP_HAL_PIN_PULL_UP PIN_PULL_UP_100K
#define MP_HAL_PIN_PULL_DOWN PIN_PULL_DOWN_100K
#define MP_HAL_PIN_SPEED_LOW (0)
#define MP_HAL_PIN_SPEED_MEDIUM (1)
#define MP_HAL_PIN_SPEED_HIGH (2)
#define MP_HAL_PIN_SPEED_VERY_HIGH (3)
#define MP_HAL_PIN_TRIGGER_NONE kGPIO_NoIntmode
#define MP_HAL_PIN_TRIGGER_FALL kGPIO_IntFallingEdge
#define MP_HAL_PIN_TRIGGER_RISE kGPIO_IntRisingEdge
#define MP_HAL_PIN_TRIGGER_RISE_FALL kGPIO_IntRisingOrFallingEdge
extern ringbuf_t stdin_ringbuf;
// Define an alias for systick_ms, because the shared softtimer.c uses

9
ports/mimxrt/pin.h
View File

@ -39,6 +39,10 @@
((MODE) == PIN_MODE_OPEN_DRAIN) || \
((MODE) == PIN_MODE_ALT))
#define IS_GPIO_IT_MODE(MODE) (((MODE) == PIN_MODE_IT_RISING) || \
((MODE) == PIN_MODE_IT_FALLING) || \
((MODE) == PIN_MODE_IT_BOTH))
#define IS_GPIO_DRIVE(DRIVE) (((DRIVE) == PIN_DRIVE_OFF) || \
((DRIVE) == PIN_DRIVE_0) || \
((DRIVE) == PIN_DRIVE_1) || \
@ -56,6 +60,9 @@ enum {
PIN_MODE_OPEN_DRAIN,
PIN_MODE_ALT,
PIN_MODE_SKIP,
PIN_MODE_IT_RISING,
PIN_MODE_IT_FALLING,
PIN_MODE_IT_BOTH,
};
enum {
@ -161,6 +168,8 @@ const machine_pin_af_obj_t *pin_find_af(const machine_pin_obj_t *pin, uint8_t fn
const machine_pin_af_obj_t *pin_find_af_by_index(const machine_pin_obj_t *pin, mp_uint_t af_idx);
const machine_pin_af_obj_t *pin_find_af_by_name(const machine_pin_obj_t *pin, const char *name);
void machine_pin_set_mode(const machine_pin_obj_t *pin, uint8_t mode);
void machine_pin_config(const machine_pin_obj_t *self, uint8_t mode,
uint8_t pull, uint8_t drive, uint8_t speed, uint8_t alt);
uint32_t pin_generate_config(const uint32_t pull, const uint32_t mode, const uint32_t drive, uint32_t config_register);
#endif // MICROPY_INCLUDED_MIMXRT_PIN_H