From: Keith Packard <keithp@keithp.com>
Date: Tue, 9 Aug 2016 05:39:16 +0000 (-0700)
Subject: altos/stmf0: Switch ADC fast to ADC clock
X-Git-Tag: 1.6.8~1^2~20
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=46b1234140c04dbfac22be0fdf80be96506b6948

altos/stmf0: Switch ADC fast to ADC clock

Using this slower clock eliminates sampling problems with the ADC and
cleans up the chaoskey raw data.

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/stmf0/ao_adc_fast.c b/src/stmf0/ao_adc_fast.c
index fbf4ad2e..5ce3a396 100644
--- a/src/stmf0/ao_adc_fast.c
+++ b/src/stmf0/ao_adc_fast.c
@@ -154,7 +154,7 @@ ao_adc_init(void)
 #endif
 
 	/* Set the clock */
-	stm_adc.cfgr2 = STM_ADC_CFGR2_CKMODE_PCLK_2 << STM_ADC_CFGR2_CKMODE;
+	stm_adc.cfgr2 = STM_ADC_CFGR2_CKMODE_ADCCLK << STM_ADC_CFGR2_CKMODE;
 
 	/* Shortest sample time */
 	stm_adc.smpr = STM_ADC_SMPR_SMP_1_5 << STM_ADC_SMPR_SMP;