How to keep date and time after shut down power in STM32F429iDisco?

[Linda]

Posted on June 10, 2015 at 23:34

Hi,

We want to add a cell battery to keep time and date. but in the schemaitcs, Pin 1 and Pin 6 in STM32F429iDisco for VBAT alredy connect to +3V.What we can do?Thanks a lot

[Tesla DeLorean]

Posted on August 20, 2015 at 19:37

I have an STM32F429I-DISCO with an LSE, added as described earlier. The clock starts and runs for me.

Not sure where you're implementation is falling over. If you need consulting work done on this, please contact me off board.

[Tesla DeLorean]

Posted on August 20, 2015 at 19:54

Attached is a small test app that turns on the LSI and LSE, and benchmarks them against the 8 MHz HSE source.

The software outputs via the SWV (use ST-LINK SWV Viewer) at 180 MHz

Test
SYS:180000000 H:180000000, P1:45000000, P2:90000000
PLL Source
PLL using HSE
HSI Running
HSE Running
PLL Running
WARNING: PLL I2S Not Ready
WARNING: LSI Failed to start
LSE Running
SYSTICK:180000
STM32 2048 KB FLASH, 256 KB RAM, 002D001B-3432470C-30333837 UNIQUE
ClockDiagnostic
SYS:180000000 H:180000000, P1:45000000, P2:90000000
LSI:32216, LSE:32764
PLL Source
0 32766
1 32765
2 32765
3 32765
4 32765
5 32765
6 32765
7 32765
8 32765
9 32765
SYS:180000000 H:180000000, P1:45000000, P2:90000000
PLL Source
PLL using HSE
HSI Running
HSE Running
PLL Running
WARNING: PLL I2S Not Ready
LSI Running
LSE Running
SYSTICK:180000
STM32 2048 KB FLASH, 256 KB RAM, 002D001B-3432470C-30333837 UNIQUE

________________ Attachments : SWV-LSI-STM32F429-DISCO.hex : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I10o&d=%2Fa%2F0X0000000bj3%2F3nqyllAKFcR0eRaZujIDIgRdFxyMx_pUoEDe0dNgpO8&asPdf=false

[Linda]

Posted on August 21, 2015 at 11:52

Dear clive1,

I try to contact you off board.But I am not able to find your contact info. Do you mind to send me email: linda.li8933@yahoo.caThanks

[Linda]

Posted on December 31, 2015 at 22:54