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-rw-r--r--md/writeup.md2
-rw-r--r--md/writeup/dsp_lp_filter.md2
2 files changed, 3 insertions, 1 deletions
diff --git a/md/writeup.md b/md/writeup.md
index 3bddfc9..d9a99b1 100644
--- a/md/writeup.md
+++ b/md/writeup.md
@@ -18,6 +18,8 @@ title: Writeup page
[Kernel:Debug messages](writeup/kernel_debug_messages.md)
[Kernel:/dev/hwrng](writeup/kernel_dev_hwrng.md)
[DSP:Low-pass filter](writeup/dsp_lp_filter.md)
+<!--[Write hello world with stm32](writeup/hello_world_stm32.md) -->
+[C macro tricks](writeup/c_macro_tricks.md)
## Projects
diff --git a/md/writeup/dsp_lp_filter.md b/md/writeup/dsp_lp_filter.md
index 270fa4a..17b8c52 100644
--- a/md/writeup/dsp_lp_filter.md
+++ b/md/writeup/dsp_lp_filter.md
@@ -1,7 +1,7 @@
title: DSP Low-pass FIR filter
keywords:c,dsp,filter,fir,low-ass
-# Low FIR pass-filter
+# Low pass FIR filter
## Intro