diff options
| -rw-r--r-- | ports/rp2/machine_adc.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/ports/rp2/machine_adc.c b/ports/rp2/machine_adc.c index f0f367151..f8925e5aa 100644 --- a/ports/rp2/machine_adc.c +++ b/ports/rp2/machine_adc.c @@ -78,7 +78,10 @@ STATIC mp_obj_t machine_adc_make_new(const mp_obj_type_t *type, size_t n_args, s } } - adc_init(); + // Initialise the ADC peripheral if it's not already running. + if (!(adc_hw->cs & ADC_CS_EN_BITS)) { + adc_init(); + } if (ADC_IS_VALID_GPIO(channel)) { // Configure the GPIO pin in ADC mode. |