disable pad keeper when using ADC pin; otherwise you'll see a 20k input

impedance.
2012-11-29 07:49:54 -05:00 · 2012-11-29 07:49:54 -05:00 · f7d1d78ac9
commit f7d1d78ac9
parent 89603f7b78
1 changed files with 1 additions and 0 deletions
--- a/cpu/mc1322x/lib/adc.c
+++ b/cpu/mc1322x/lib/adc.c
@ -76,6 +76,7 @@ void adc_service(void) {
            ADC->SEQ_1bits.CH##x = 1; \
            GPIO->FUNC_SEL.ADC##x = 1; \
 	    GPIO->PAD_DIR.ADC##x = 0; \
+	    GPIO->PAD_KEEP.ADC##x = 0; \
            GPIO->PAD_PU_EN.ADC##x = 0; \
 }} while (0)