diff options
Diffstat (limited to 'board/zinger/hardware.c')
| -rw-r--r-- | board/zinger/hardware.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/board/zinger/hardware.c b/board/zinger/hardware.c index fc0612eeb9..7e2cb013ea 100644 --- a/board/zinger/hardware.c +++ b/board/zinger/hardware.c @@ -104,13 +104,17 @@ static void adc_init(void) /* Only do the calibration if the ADC is off */ if (!(STM32_ADC_CR & 1)) { /* ADC calibration */ - STM32_ADC_CR = 1 << 31; /* set ADCAL = 1, ADC off */ + STM32_ADC_CR = STM32_ADC_CR_ADCAL; /* set ADCAL = 1, ADC off */ /* wait for the end of calibration */ - while (STM32_ADC_CR & (1 << 31)) + while (STM32_ADC_CR & STM32_ADC_CR_ADCAL) ; } + /* As per ST recommendation, ensure two cycles before setting ADEN */ + asm volatile("nop; nop;"); /* ADC enabled */ - STM32_ADC_CR = 1 << 0; + STM32_ADC_CR = STM32_ADC_ISR_ADRDY; + while (!(STM32_ADC_ISR & STM32_ADC_ISR_ADRDY)) + ; /* Single conversion, right aligned, 12-bit */ STM32_ADC_CFGR1 = 1 << 12; /* (1 << 15) => AUTOOFF */; /* clock is ADCCLK */ |