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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2021/05/10 13:28:14 UTC

[GitHub] [incubator-nuttx] acassis commented on issue #3686: low baud rate serial port not supported

acassis commented on issue #3686:
URL: https://github.com/apache/incubator-nuttx/issues/3686#issuecomment-836699669


   Hi @davids5 that is exactly what I did.
   I noticed that configuring the STM32L496 to 110 bps was resulting a baud rate of 12547 bps, because the mask to 16-bit was removing the higher part. Then I changed the SYSCLK from 80MHz to 48MHz and divided it by 16 to get 3MHz: APB1 clock (PCLK1) is HCLK/16 (3MHz). Other modification was "#  define STM32L4_CLK48_SEL       RCC_CCIPR_CLK48SEL_PLLMAIN" to get USB and serial working at same time.


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