pimoroni-pico/micropython/modules/breakout_bmp280/breakout_bmp280.cpp

121 lines
4.4 KiB
C++

#include "drivers/bmp280/bmp280.hpp"
#define MP_OBJ_TO_PTR2(o, t) ((t *)(uintptr_t)(o))
// SDA/SCL on even/odd pins, I2C0/I2C1 on even/odd pairs of pins.
#define IS_VALID_SCL(i2c, pin) (((pin) & 1) == 1 && (((pin) & 2) >> 1) == (i2c))
#define IS_VALID_SDA(i2c, pin) (((pin) & 1) == 0 && (((pin) & 2) >> 1) == (i2c))
using namespace pimoroni;
extern "C" {
#include "breakout_bmp280.h"
#include "pimoroni_i2c.h"
/***** I2C Struct *****/
typedef struct _PimoroniI2C_obj_t {
mp_obj_base_t base;
I2C *i2c;
} _PimoroniI2C_obj_t;
/***** Variables Struct *****/
typedef struct _breakout_bmp280_BreakoutBMP280_obj_t {
mp_obj_base_t base;
BMP280 *breakout;
} breakout_bmp280_BreakoutBMP280_obj_t;
/***** Print *****/
void BreakoutBMP280_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
(void)kind; //Unused input parameter
breakout_bmp280_BreakoutBMP280_obj_t *self = MP_OBJ_TO_PTR2(self_in, breakout_bmp280_BreakoutBMP280_obj_t);
BMP280* breakout = self->breakout;
mp_print_str(print, "BreakoutBMP280(");
mp_print_str(print, "i2c = ");
mp_obj_print_helper(print, mp_obj_new_int((breakout->get_i2c()->get_i2c() == i2c0) ? 0 : 1), PRINT_REPR);
mp_print_str(print, ", sda = ");
mp_obj_print_helper(print, mp_obj_new_int(breakout->get_i2c()->get_sda()), PRINT_REPR);
mp_print_str(print, ", scl = ");
mp_obj_print_helper(print, mp_obj_new_int(breakout->get_i2c()->get_scl()), PRINT_REPR);
mp_print_str(print, ", int = ");
mp_obj_print_helper(print, mp_obj_new_int(breakout->get_int()), PRINT_REPR);
mp_print_str(print, ")");
}
/***** Constructor *****/
mp_obj_t BreakoutBMP280_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
breakout_bmp280_BreakoutBMP280_obj_t *self = nullptr;
enum { ARG_i2c, ARG_address, ARG_int };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_i2c, MP_ARG_OBJ, {.u_obj = nullptr} },
{ MP_QSTR_address, MP_ARG_INT, {.u_int = BMP280::DEFAULT_I2C_ADDRESS} },
{ MP_QSTR_interrupt, MP_ARG_INT, {.u_int = PIN_UNUSED} },
};
// Parse args.
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
if(!MP_OBJ_IS_TYPE(args[ARG_i2c].u_obj, &PimoroniI2C_type)) {
mp_raise_ValueError(MP_ERROR_TEXT("BreakoutBMP280: Bad i2C object"));
return mp_const_none;
}
_PimoroniI2C_obj_t *i2c = (_PimoroniI2C_obj_t *)MP_OBJ_TO_PTR(args[ARG_i2c].u_obj);
self = m_new_obj(breakout_bmp280_BreakoutBMP280_obj_t);
self->base.type = &breakout_bmp280_BreakoutBMP280_type;
self->breakout = new BMP280(i2c->i2c, args[ARG_address].u_int, args[ARG_int].u_int);
if(!self->breakout->init()) {
mp_raise_msg(&mp_type_RuntimeError, "BreakoutBMP280: breakout not found when initialising");
}
return MP_OBJ_FROM_PTR(self);
}
mp_obj_t BreakoutBMP280_read(mp_obj_t self_in) {
breakout_bmp280_BreakoutBMP280_obj_t *self = MP_OBJ_TO_PTR2(self_in, breakout_bmp280_BreakoutBMP280_obj_t);
BMP280::bmp280_reading result = self->breakout->read();
mp_obj_t tuple[2];
tuple[0] = mp_obj_new_float(result.temperature);
tuple[1] = mp_obj_new_float(result.pressure);
return mp_obj_new_tuple(2, tuple);
}
mp_obj_t BreakoutBMP280_configure(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_self, ARG_filter, ARG_standby_time, ARG_os_pressure, ARG_os_temp, ARG_mode };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_, MP_ARG_REQUIRED | MP_ARG_OBJ },
{ MP_QSTR_filter, MP_ARG_INT, { .u_int=BMP280_FILTER_COEFF_2 } },
{ MP_QSTR_standby_time, MP_ARG_INT, { .u_int=BMP280_ODR_0_5_MS } },
{ MP_QSTR_os_pressure, MP_ARG_INT, { .u_int=BMP280_OS_16X } },
{ MP_QSTR_os_temp, MP_ARG_INT, { .u_int=BMP280_OS_2X } },
{ MP_QSTR_mode, MP_ARG_INT, { .u_int=BMP280_NORMAL_MODE } },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
breakout_bmp280_BreakoutBMP280_obj_t *self = MP_OBJ_TO_PTR2(args[ARG_self].u_obj, breakout_bmp280_BreakoutBMP280_obj_t);
self->breakout->configure(
args[ARG_filter].u_int,
args[ARG_standby_time].u_int,
args[ARG_os_pressure].u_int,
args[ARG_os_temp].u_int,
args[ARG_mode].u_int
);
return mp_const_none;
}
}