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authorwuyangyong <[email protected]>2012-07-31 17:13:59 +0000
committerwuyangyong <[email protected]>2012-07-31 17:13:59 +0000
commit29846c07aac9098b402e2f136cd0dc635653a1b7 (patch)
tree4a46f0bf928a8ed57e2c1f65d2e0a1db522d7c03 /bsp
parent0919b8dab184ce36e6ae2db9d6938bdc372edae5 (diff)
add stm32f40x/readme.txt
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2240 bbd45198-f89e-11dd-88c7-29a3b14d5316
Diffstat (limited to 'bsp')
-rw-r--r--bsp/stm32f40x/readme.txt9
1 files changed, 9 insertions, 0 deletions
diff --git a/bsp/stm32f40x/readme.txt b/bsp/stm32f40x/readme.txt
new file mode 100644
index 0000000000..7bebe251c6
--- /dev/null
+++ b/bsp/stm32f40x/readme.txt
@@ -0,0 +1,9 @@
+board info:
+STM32F4 discovery
+http://www.st.com/internet/evalboard/product/252419.jsp
+
+note:
+in drivers/stm32f4xx_conf.h
+ /* Redefine the HSE value; it's equal to 8 MHz on the STM32F4-DISCOVERY Kit */
+ #define HSE_VALUE ((uint32_t)8000000)
+