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stm32h7:adc read & clear EOC on init

This commit is contained in:
David Sidrane 2020-05-21 11:57:50 -07:00 committed by Daniel Agar
parent bd1f69fb76
commit 19cf2f47ac
1 changed files with 6 additions and 2 deletions
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8
platforms/nuttx/src/px4/stm/stm32h7/adc/adc.cpp
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@ -224,7 +224,7 @@ int px4_arch_adc_init(uint32_t base_address)
}
/* arbitrarily configure all channels for 810.5 cycle sample time */
/* arbitrarily configure all channels for 64.5 cycle sample time */
rSMPR1(base_address) = ADC_SMPR1_DEFAULT;
rSMPR2(base_address) = ADC_SMPR2_DEFAULT;
@ -260,6 +260,10 @@ int px4_arch_adc_init(uint32_t base_address)
}
}
/* Read out result, clear EOC */
(void) rDR(base_address);
return OK;
}
@ -278,7 +282,7 @@ uint32_t px4_arch_adc_sample(uint32_t base_address, unsigned channel)
rISR(base_address) &= ~ADC_INT_EOC;
}
/* run a single conversion right now - should take about 810.5 cycles (34 microseconds) max */
/* run a single conversion right now - should take about 64.5 cycles (34 microseconds) max */
rPCSEL(base_address) |= 1 << channel;
rSQR1(base_address) = channel << ADC_SQR1_SQ_OFFSET;