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authorChristian Mauderer <christian.mauderer@embedded-brains.de>2021-07-15 15:31:17 +0200
committerChristian Mauderer <christian.mauderer@embedded-brains.de>2021-07-29 16:50:40 +0200
commit238b48f9f8b0a9126b75d058ac4392cbe483af5b (patch)
treeed36a7008f6243e22d2ed17f360547d2b28f54f9 /user
parent18746fb259c585442e2f6e893e2ab8900aa50d0c (diff)
downloadrtems-docs-238b48f9f8b0a9126b75d058ac4392cbe483af5b.tar.bz2
user/imxrt: Add notes about problems with EVB
There are some possible problems with the i.MXRT1050 evaluation board. Make some notes about that in the BSP manual.
Diffstat (limited to '')
-rw-r--r--user/bsps/arm/imxrt.rst9
1 files changed, 9 insertions, 0 deletions
diff --git a/user/bsps/arm/imxrt.rst b/user/bsps/arm/imxrt.rst
index 3f8b270..f8d9731 100644
--- a/user/bsps/arm/imxrt.rst
+++ b/user/bsps/arm/imxrt.rst
@@ -10,6 +10,10 @@ This BSP offers only one variant, the `imxrt1052`. This variant supports the
i.MXRT 1052 processor on a IMXRT1050-EVKB (tested with rev A1). You can also
configure it to work with custom boards.
+NOTE: The IMXRT1050-EVKB has an backlight controller that must not be enabled
+without load. Make sure to either attach a load, disable it by software or
+disable it by removing the 0-Ohm resistor on it's input.
+
Build Configuration Options
---------------------------
@@ -41,6 +45,11 @@ Then just copy the generated binary to the mass storage provided by the
debugger. Wait a bit till the mass storage vanishes and re-appears. After that,
reset the board and the newly programmed application will start.
+NOTE: It seems that there is a bug on at least some of the on board debuggers.
+They can't write more than 1MB to the HyperFlash. If your application is bigger
+than that (like quite some of the applications in libbsd), you should use an
+external debugger or find some alternative programming method.
+
For debugging: Create a special application with a `while(true)` loop at end of
`bsp_start_hook_1`. Load that application into flash. Then remove the loop
again, build your BSP for SDRAM and use a debugger to load the application into