reference u stm32f162rd

[Jan Waclawek]

>Dne 18.2.2016 20:18, Jaroslav Buchta napsal(a):
>> Tohle jste zohlednil?
>>
>> The TSVREFE bit in the ADC_CCR register must be set to enable the 
>> internal reference voltage (and also the Temperature sensor). This 
>> reference voltage must be enabled only if its conversion is required.
>ano
>> The internal reference voltage is factory measured and the result of 
>> the ADC conversion is stored in a specific data address : the 
>> VREFINT_Factory_CONV byte.
>>
>zatim ne .chystam se na to ,ale pripadal mi ten rozdil moc velkej na 
>chybu v kalibraci .

Co nie, nepovolujete TSVREFE, alebo nepouzivate tu factory calibration?

Mimochodom, v DS je pomerne rozsiahly elaborat na temu tej referencie
(nepozeram do 'L16x ale 'L15x, ale to by malo byt to iste), oplati sa
postudovat a porozmyslat. Napriklad taky TVREFINT Internal reference
startup time typ.2 max.3 ms - nie je to bohvieako popisane, ale povedal by
som, ze tolkoto treba pockat po povoleni TSVREFE a pred konverziou. Alebo
vobec to, ake napatie ta referencia ma mat, nie je to celkom 1.2V (aj ked
ani 1.5V nie to je fakt). Alebo TS_vrefint - ak mam byt uprimny, myslim
si, ze popis nie je adkvatny a je matuci, ale pokusil by som sa pre
konverziu tej referencie nastavit ten typicky sampling time.

wek