diff options
Diffstat (limited to 'nuttx/configs/stm32f4discovery/README.txt')
| -rwxr-xr-x | nuttx/configs/stm32f4discovery/README.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/nuttx/configs/stm32f4discovery/README.txt b/nuttx/configs/stm32f4discovery/README.txt index 1ad1a2e0b..e4a676f44 100755 --- a/nuttx/configs/stm32f4discovery/README.txt +++ b/nuttx/configs/stm32f4discovery/README.txt @@ -843,3 +843,13 @@ Where <subdir> is one of the following: CONFIG_WATCHDOG=y : Enables watchdog timer driver support CONFIG_STM32_WWDG=y : Enables the WWDG timer facility, OR CONFIG_STM32_IWDG=y : Enables the IWDG timer facility (but not both) + + The WWDG watchdog is driven off the (fast) 42MHz PCLK1 and, as result, + has a maximum timout value of 49 milliseconds. for WWDG watchdog, you + should also add the fillowing to the configuration file: + + CONFIG_EXAMPLES_WATCHDOG_PINGDELAY=20 + CONFIG_EXAMPLES_WATCHDOG_TIMEOUT=49 + + The IWDG timer has a range of about 35 seconds and should not be an issue. + |