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nrf/machine/adc: Add ADC.read_u16() method.

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This commit is contained in:
Damien George 2019-07-25 18:22:54 +10:00
parent 983283a8cd
commit 9cad134a2f
1 changed files with 15 additions and 0 deletions
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15
ports/nrf/modules/machine/adc.c
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@ -169,6 +169,20 @@ int16_t machine_adc_value_read(machine_adc_obj_t * adc_obj) {
return value;
}
// read_u16()
STATIC mp_obj_t machine_adc_read_u16(mp_obj_t self_in) {
machine_adc_obj_t *self = self_in;
int16_t raw = machine_adc_value_read(self);
#if defined(NRF52_SERIES)
// raw is signed but the channel is in single-ended mode and this method cannot return negative values
if (raw < 0) {
raw = 0;
}
#endif
// raw is an 8-bit value
return MP_OBJ_NEW_SMALL_INT(raw << 8 | raw);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_machine_adc_read_u16_obj, machine_adc_read_u16);
/// \method value()
/// Read adc level.
@ -263,6 +277,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_0(mp_machine_adc_battery_level_obj, machine_adc_b
STATIC const mp_rom_map_elem_t machine_adc_locals_dict_table[] = {
// instance methods
{ MP_ROM_QSTR(MP_QSTR_read_u16), MP_ROM_PTR(&mp_machine_adc_read_u16_obj) },
{ MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&mp_machine_adc_value_obj) },
// class methods