diff options
| author | Bart Massey <bart.massey@gmail.com> | 2016-02-08 18:55:28 -0800 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2016-02-08 18:55:28 -0800 |
| commit | e36117ccbf7cbe3704c6b44d3ad429e720a1e16c (patch) | |
| tree | f421f051a1b6ea260098e1a158705472ab6ffb70 | |
| parent | 5ce26345784459f5864ef59c96c8aa633d2ddf64 (diff) | |
Clean up stmf0 adc init.
This better matches the documented cal sequence.
Signed-off-by: Keith Packard <keithp@keithp.com>
| -rw-r--r-- | src/stmf0/ao_adc_fast.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/stmf0/ao_adc_fast.c b/src/stmf0/ao_adc_fast.c index 26e6691c..f6740b0e 100644 --- a/src/stmf0/ao_adc_fast.c +++ b/src/stmf0/ao_adc_fast.c @@ -83,7 +83,6 @@ void ao_adc_init(void) { uint32_t chselr; - int i; /* Reset ADC */ stm_rcc.apb2rstr |= (1 << STM_RCC_APB2RSTR_ADCRST); @@ -157,12 +156,13 @@ ao_adc_init(void) /* Shortest sample time */ stm_adc.smpr = STM_ADC_SMPR_SMP_1_5 << STM_ADC_SMPR_SMP; + /* Turn off enable and start */ + stm_adc.cr &= ~((1 << STM_ADC_CR_ADEN) | (1 << STM_ADC_CR_ADSTART)); + /* Calibrate */ stm_adc.cr |= (1 << STM_ADC_CR_ADCAL); - for (i = 0; i < 0xf000; i++) { - if ((stm_adc.cr & (1 << STM_ADC_CR_ADCAL)) == 0) - break; - } + while ((stm_adc.cr & (1 << STM_ADC_CR_ADCAL)) != 0) + ; /* Enable */ stm_adc.cr |= (1 << STM_ADC_CR_ADEN); |