1 files changed, 2 insertions, 2 deletions
diff --git a/src/sam3/adc.c b/src/sam3/adc.c
index b9c5fb12..0baf9118 100644
--- a/src/sam3/adc.c
+++ b/src/sam3/adc.c
@@ -34,9 +34,9 @@ gpio_adc_setup(uint8_t pin)
             break;
     }
 
-    if (!(PMC->PMC_PCSR1 & (1 << (ID_ADC-32)))) {
+    if (!is_enabled_pclock(ID_ADC)) {
         // Setup ADC
-        PMC->PMC_PCER1 = 1 << (ID_ADC-32);
+        enable_pclock(ID_ADC);
         uint32_t prescal = SystemCoreClock / (2 * ADC_FREQ_MAX) - 1;
         ADC->ADC_MR = (ADC_MR_PRESCAL(prescal)
                        | ADC_MR_STARTUP_SUT768