Continuous Conversion Mode (Cont=1) - ST STM32L4x6 Reference Manual

Analog-to-digital converters (ADC)
Inside the injected sequence, after each conversion is complete:
•
The converted data are stored into one of the four 16-bit ADCx_JDRy registers
•
The JEOC (end of injected conversion) flag is set
•
An interrupt is generated if the JEOCIE bit is set
After the regular sequence is complete:
•
The EOS (end of regular sequence) flag is set
•
An interrupt is generated if the EOSIE bit is set
After the injected sequence is complete:
•
The JEOS (end of injected sequence) flag is set
•
An interrupt is generated if the JEOSIE bit is set
Then the ADC stops until a new external regular or injected trigger occurs or until bit
ADSTART or JADSTART is set again.
Note: To convert a single channel, program a sequence with a length of 1.
16.3.14

Continuous conversion mode (CONT=1)

This mode applies to regular channels only.
In continuous conversion mode, when a software or hardware regular trigger event occurs,
the ADC performs once all the regular conversions of the channels and then automatically
re-starts and continuously converts each conversions of the sequence. This mode is started
with the CONT bit at 1 either by external trigger or by setting the ADSTART bit in the
ADCx_CR register.
Inside the regular sequence, after each conversion is complete:
• The converted data are stored into the 16-bit ADCx_DR register
•
The EOC (end of conversion) flag is set
•
An interrupt is generated if the EOCIE bit is set
After the sequence of conversions is complete:
•
The EOS (end of sequence) flag is set
•
An interrupt is generated if the EOSIE bit is set
Then, a new sequence restarts immediately and the ADC continuously repeats the
conversion sequence.
Note: To convert a single channel, program a sequence with a length of 1.
It is not possible to have both discontinuous mode and continuous mode enabled: it is
forbidden to set both DISCEN=1 and CONT=1.
Injected channels cannot be converted continuously. The only exception is when an injected
channel is configured to be converted automatically after regular channels in continuous
mode (using JAUTO bit), refer to
444/1693
Auto-injection mode
DocID024597 Rev 3
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RM0351