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Updated README files

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Gregory Nutt 2014-04-16 16:41:47 -06:00
parent 51950d7850
commit 5eb9ee30dd
2 changed files with 32 additions and 0 deletions
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16
configs/sama5d3-xplained/README.txt
View File

@ -340,6 +340,12 @@ Running NuttX from SDRAM
- Programming U-Boot
- Load NuttX with U-Boot on AT91 boards
TODO: Some drivers may require some adjustments to run from SDRAM. That
is because in this case macros like BOARD_MCK_FREQUENCY are not constants
but are instead function calls: The MCK clock frequency is not known in
advance but instead has to be calculated from the bootloader PLL configuration.
See the TODO list at the end of this file for further information.
NuttX Configuration
-------------------
@ -2767,3 +2773,13 @@ To-Do List
3) GMAC has only been tested on a 10/100Base-T network. I don't have a
1000Base-T network to support additional testing.
4) Some drivers may require some adjustments if you intend to run from SDRAM.
That is because in this case macros like BOARD_MCK_FREQUENCY are not constants
but are instead function calls: The MCK clock frequency is not known in
advance but instead has to be calculated from the bootloader PLL configuration.
As of this writing, all drivers have been converted to run from SDRAM except
for the PWM and the Timer/Counter drivers. These drivers use the
BOARD_MCK_FREQUENCY definition in more complex ways and will require some
minor redesign and re-testing before they can be available.

16
configs/sama5d3x-ek/README.txt
View File

@ -461,6 +461,12 @@ Running NuttX from SDRAM
- Programming U-Boot
- Load NuttX with U-Boot on AT91 boards
TODO: Some drivers may require some adjustments to run from SDRAM. That
is because in this case macros like BOARD_MCK_FREQUENCY are not constants
but are instead function calls: The MCK clock frequency is not known in
advance but instead has to be calculated from the bootloader PLL configuration.
See the TODO list at the end of this file for further information.
NuttX Configuration
-------------------
@ -3474,3 +3480,13 @@ To-Do List
10) GMAC has only been tested on a 10/100Base-T network. I don't have a
1000Base-T network to support additional testing.
11) Some drivers may require some adjustments if you intend to run from SDRAM.
That is because in this case macros like BOARD_MCK_FREQUENCY are not constants
but are instead function calls: The MCK clock frequency is not known in
advance but instead has to be calculated from the bootloader PLL configuration.
As of this writing, all drivers have been converted to run from SDRAM except
for the PWM and the Timer/Counter drivers. These drivers use the
BOARD_MCK_FREQUENCY definition in more complex ways and will require some
minor redesign and re-testing before they can be available.