From dc1985f978e2f1a7ca99c4add80cf825955251de Mon Sep 17 00:00:00 2001
From: Rui Huang <vowstar@users.noreply.github.com>
Date: Tue, 23 Apr 2019 11:20:57 +0800
Subject: [PATCH 1/3] Fix document problem, change AES to FFT

---
 fft_test/README.md | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/fft_test/README.md b/fft_test/README.md
index 9eb85b8..3f9b0f2 100644
--- a/fft_test/README.md
+++ b/fft_test/README.md
@@ -1,6 +1,12 @@
-FFT hardware calculation
-=====
-include FFT-512 FFT-256 FFT-128 FFT-64.
+# FFT and IFFT hardware calculation
+
+include 
+
+- FFT-512/IFFT-512
+- FFT-256/IFFT-256
+- FFT-128/IFFT-128
+- FFT-64/IFFT-64
 
 1.Calculate the frequency, phase and amplitude of the time domain signal.
-2.Compare the time spent on hardware aes and software aes.
+
+2.Compare the time spent on hardware FFT and software FFT.

From 17062b6ae82d5801bbff098f506e5d40fbb3f167 Mon Sep 17 00:00:00 2001
From: bj_wanghz <bj_wanghz@126.com>
Date: Wed, 5 Jun 2019 17:21:28 +0800
Subject: [PATCH 2/3] fix image sawtooth problem

---
 dvp2sdcard/rgb2bmp.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/dvp2sdcard/rgb2bmp.c b/dvp2sdcard/rgb2bmp.c
index 9a466ab..d158774 100644
--- a/dvp2sdcard/rgb2bmp.c
+++ b/dvp2sdcard/rgb2bmp.c
@@ -1,11 +1,14 @@
 #include "rgb2bmp.h"
 #include "ff.h"
 
-int rgb565tobmp(char *buf,int width,int height, const char *filename)
+int rgb565tobmp(uint8_t *buf,int width,int height, const char *filename)
 {
 	FIL file;
     FRESULT ret = FR_OK;
     uint32_t ret_len = 0;
+    uint32_t i;
+    uint16_t temp;
+    uint16_t *ptr;
     
 	BitMapFileHeader bmfHdr;    /* file header */
 	BitMapInfoHeader bmiHdr;    /* information header */
@@ -45,6 +48,15 @@ int rgb565tobmp(char *buf,int width,int height, const char *filename)
 	bmfHdr.bfReserved2 = 0;
 	bmfHdr.bfOffBits = sizeof(BitMapFileHeader) + sizeof(BitMapInfoHeader)+ sizeof(RgbQuad) * 3;
 
+    ptr = (uint16_t*)buf;
+    
+    for (i = 0; i < width * height; i += 2)
+    {
+        temp = ptr[i];
+        ptr[i] = ptr[i + 1];
+        ptr[i + 1] = temp;
+    }
+
     if ((ret = f_open(&file, filename, FA_CREATE_ALWAYS | FA_WRITE)) != FR_OK) 
     {
         printf("create file %s err[%d]\n", filename, ret);

From 956ee18f63dc9e2b57398d4603519f97d411f164 Mon Sep 17 00:00:00 2001
From: bj_wanghz <bj_wanghz@126.com>
Date: Mon, 24 Jun 2019 20:09:06 +0800
Subject: [PATCH 3/3] fix the type conflict of rgb565tobmp()

---
 dvp2sdcard/main.c    | 2 +-
 dvp2sdcard/rgb2bmp.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/dvp2sdcard/main.c b/dvp2sdcard/main.c
index d604e53..ec83e94 100644
--- a/dvp2sdcard/main.c
+++ b/dvp2sdcard/main.c
@@ -249,7 +249,7 @@ int main(void)
 
         if (g_save_flag)
         {
-            rgb565tobmp((char*)(g_ram_mux ? g_lcd_gram0 : g_lcd_gram1), 320, 240, _T("0:photo.bmp"));
+            rgb565tobmp((uint8_t*)(g_ram_mux ? g_lcd_gram0 : g_lcd_gram1), 320, 240, _T("0:photo.bmp"));
             g_save_flag = 0;
         }
         /* display pic*/        
diff --git a/dvp2sdcard/rgb2bmp.h b/dvp2sdcard/rgb2bmp.h
index 48330ab..6ee15a3 100644
--- a/dvp2sdcard/rgb2bmp.h
+++ b/dvp2sdcard/rgb2bmp.h
@@ -35,6 +35,6 @@ typedef struct tagRGBQUAD{
 	uint8_t rgbReserved;/* reserved */
 }__attribute__((packed)) RgbQuad;
 
-int rgb565tobmp(char *buf,int width,int height, const char *filename);
+int rgb565tobmp(uint8_t *buf,int width,int height, const char *filename);
 
 #endif