Daiki Kato / GR-Boads_Camera_sample

Camera sample for GR-Boads

Dependencies:   mbed-os-lychee

このサンプルは 「GR-LYCHEE」ではじめる電子工作 で紹介しています。
出版時と内容が異ならないよう、各ライブラリはアップデートせずに使用してください。

このサンプルの最新バージョンは下記から入手できます。最新バージョンは本の内容と一部処理が異なります。
https://github.com/d-kato/GR-Boards_Camera_sample

main.cpp@0:a1daffd30b6d, 2017-10-13 (annotated)

Committer:
dkato
Date:
Fri Oct 13 11:59:28 2017 +0000
Revision:
0:a1daffd30b6d
Child:
1:be0f952b4551
first commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dkato 0:a1daffd30b6d 1 #include "mbed.h"
dkato 0:a1daffd30b6d 2 #include "EasyAttach_CameraAndLCD.h"
dkato 0:a1daffd30b6d 3 #include "SdUsbConnect.h"
dkato 0:a1daffd30b6d 4 #include "JPEG_Converter.h"
dkato 0:a1daffd30b6d 5 #include "dcache-control.h"
dkato 0:a1daffd30b6d 6
dkato 0:a1daffd30b6d 7 #define MOUNT_NAME "storage"
dkato 0:a1daffd30b6d 8
dkato 0:a1daffd30b6d 9 /*! Frame buffer stride: Frame buffer stride should be set to a multiple of 32 or 128
dkato 0:a1daffd30b6d 10 in accordance with the frame buffer burst transfer mode. */
dkato 0:a1daffd30b6d 11 #define VIDEO_PIXEL_HW (640u) /* VGA */
dkato 0:a1daffd30b6d 12 #define VIDEO_PIXEL_VW (480u) /* VGA */
dkato 0:a1daffd30b6d 13
dkato 0:a1daffd30b6d 14 #define FRAME_BUFFER_STRIDE (((VIDEO_PIXEL_HW * 2) + 31u) & ~31u)
dkato 0:a1daffd30b6d 15 #define FRAME_BUFFER_HEIGHT (VIDEO_PIXEL_VW)
dkato 0:a1daffd30b6d 16
dkato 0:a1daffd30b6d 17 #if defined(__ICCARM__)
dkato 0:a1daffd30b6d 18 #pragma data_alignment=32
dkato 0:a1daffd30b6d 19 static uint8_t user_frame_buffer0[FRAME_BUFFER_STRIDE * FRAME_BUFFER_HEIGHT]@ ".mirrorram";
dkato 0:a1daffd30b6d 20 #else
dkato 0:a1daffd30b6d 21 static uint8_t user_frame_buffer0[FRAME_BUFFER_STRIDE * FRAME_BUFFER_HEIGHT]__attribute((section("NC_BSS"),aligned(32)));
dkato 0:a1daffd30b6d 22 #endif
dkato 0:a1daffd30b6d 23 static int file_name_index = 1;
dkato 0:a1daffd30b6d 24 static volatile int Vfield_Int_Cnt = 0;
dkato 0:a1daffd30b6d 25 /* jpeg convert */
dkato 0:a1daffd30b6d 26 static JPEG_Converter Jcu;
dkato 0:a1daffd30b6d 27 #if defined(__ICCARM__)
dkato 0:a1daffd30b6d 28 #pragma data_alignment=32
dkato 0:a1daffd30b6d 29 static uint8_t JpegBuffer[1024 * 63];
dkato 0:a1daffd30b6d 30 #else
dkato 0:a1daffd30b6d 31 static uint8_t JpegBuffer[1024 * 63]__attribute((aligned(32)));
dkato 0:a1daffd30b6d 32 #endif
dkato 0:a1daffd30b6d 33
dkato 0:a1daffd30b6d 34 DisplayBase Display;
dkato 0:a1daffd30b6d 35 DigitalIn button0(USER_BUTTON0);
dkato 0:a1daffd30b6d 36 DigitalOut led1(LED1);
dkato 0:a1daffd30b6d 37
dkato 0:a1daffd30b6d 38 static void IntCallbackFunc_Vfield(DisplayBase::int_type_t int_type) {
dkato 0:a1daffd30b6d 39 if (Vfield_Int_Cnt > 0) {
dkato 0:a1daffd30b6d 40 Vfield_Int_Cnt--;
dkato 0:a1daffd30b6d 41 }
dkato 0:a1daffd30b6d 42 }
dkato 0:a1daffd30b6d 43
dkato 0:a1daffd30b6d 44 static void wait_new_image(void) {
dkato 0:a1daffd30b6d 45 Vfield_Int_Cnt = 1;
dkato 0:a1daffd30b6d 46 while (Vfield_Int_Cnt > 0) {
dkato 0:a1daffd30b6d 47 Thread::wait(1);
dkato 0:a1daffd30b6d 48 }
dkato 0:a1daffd30b6d 49 }
dkato 0:a1daffd30b6d 50
dkato 0:a1daffd30b6d 51 static void Start_Video_Camera(void) {
dkato 0:a1daffd30b6d 52 // Field end signal for recording function in scaler 0
dkato 0:a1daffd30b6d 53 Display.Graphics_Irq_Handler_Set(DisplayBase::INT_TYPE_S0_VFIELD, 0, IntCallbackFunc_Vfield);
dkato 0:a1daffd30b6d 54
dkato 0:a1daffd30b6d 55 // Video capture setting (progressive form fixed)
dkato 0:a1daffd30b6d 56 Display.Video_Write_Setting(
dkato 0:a1daffd30b6d 57 DisplayBase::VIDEO_INPUT_CHANNEL_0,
dkato 0:a1daffd30b6d 58 DisplayBase::COL_SYS_NTSC_358,
dkato 0:a1daffd30b6d 59 (void *)user_frame_buffer0,
dkato 0:a1daffd30b6d 60 FRAME_BUFFER_STRIDE,
dkato 0:a1daffd30b6d 61 DisplayBase::VIDEO_FORMAT_YCBCR422,
dkato 0:a1daffd30b6d 62 DisplayBase::WR_RD_WRSWA_32_16BIT,
dkato 0:a1daffd30b6d 63 VIDEO_PIXEL_VW,
dkato 0:a1daffd30b6d 64 VIDEO_PIXEL_HW
dkato 0:a1daffd30b6d 65 );
dkato 0:a1daffd30b6d 66 EasyAttach_CameraStart(Display, DisplayBase::VIDEO_INPUT_CHANNEL_0);
dkato 0:a1daffd30b6d 67 }
dkato 0:a1daffd30b6d 68
dkato 0:a1daffd30b6d 69 static void save_image_jpg(void) {
dkato 0:a1daffd30b6d 70 size_t jcu_encode_size;
dkato 0:a1daffd30b6d 71 JPEG_Converter::bitmap_buff_info_t bitmap_buff_info;
dkato 0:a1daffd30b6d 72 JPEG_Converter::encode_options_t encode_options;
dkato 0:a1daffd30b6d 73
dkato 0:a1daffd30b6d 74 bitmap_buff_info.width = VIDEO_PIXEL_HW;
dkato 0:a1daffd30b6d 75 bitmap_buff_info.height = VIDEO_PIXEL_VW;
dkato 0:a1daffd30b6d 76 bitmap_buff_info.format = JPEG_Converter::WR_RD_YCbCr422;
dkato 0:a1daffd30b6d 77 bitmap_buff_info.buffer_address = (void *)user_frame_buffer0;
dkato 0:a1daffd30b6d 78
dkato 0:a1daffd30b6d 79 encode_options.encode_buff_size = sizeof(JpegBuffer);
dkato 0:a1daffd30b6d 80 encode_options.p_EncodeCallBackFunc = NULL;
dkato 0:a1daffd30b6d 81 encode_options.input_swapsetting = JPEG_Converter::WR_RD_WRSWA_32_16_8BIT;
dkato 0:a1daffd30b6d 82
dkato 0:a1daffd30b6d 83 jcu_encode_size = 0;
dkato 0:a1daffd30b6d 84 dcache_invalid(JpegBuffer, sizeof(JpegBuffer));
dkato 0:a1daffd30b6d 85 if (Jcu.encode(&bitmap_buff_info, JpegBuffer, &jcu_encode_size, &encode_options) != JPEG_Converter::JPEG_CONV_OK) {
dkato 0:a1daffd30b6d 86 jcu_encode_size = 0;
dkato 0:a1daffd30b6d 87 }
dkato 0:a1daffd30b6d 88
dkato 0:a1daffd30b6d 89 char file_name[32];
dkato 0:a1daffd30b6d 90 sprintf(file_name, "/"MOUNT_NAME"/img_%d.jpg", file_name_index++);
dkato 0:a1daffd30b6d 91 FILE * fp = fopen(file_name, "w");
dkato 0:a1daffd30b6d 92 fwrite(JpegBuffer, sizeof(char), (int)jcu_encode_size, fp);
dkato 0:a1daffd30b6d 93 fclose(fp);
dkato 0:a1daffd30b6d 94 printf("Saved file %s\r\n", file_name);
dkato 0:a1daffd30b6d 95 }
dkato 0:a1daffd30b6d 96
dkato 0:a1daffd30b6d 97 int main() {
dkato 0:a1daffd30b6d 98 // Initialize the background to black
dkato 0:a1daffd30b6d 99 for (uint32_t i = 0; i < sizeof(user_frame_buffer0); i += 2) {
dkato 0:a1daffd30b6d 100 user_frame_buffer0[i + 0] = 0x10;
dkato 0:a1daffd30b6d 101 user_frame_buffer0[i + 1] = 0x80;
dkato 0:a1daffd30b6d 102 }
dkato 0:a1daffd30b6d 103
dkato 0:a1daffd30b6d 104 // Camera
dkato 0:a1daffd30b6d 105 EasyAttach_Init(Display);
dkato 0:a1daffd30b6d 106 Start_Video_Camera();
dkato 0:a1daffd30b6d 107
dkato 0:a1daffd30b6d 108 // SD & USB
dkato 0:a1daffd30b6d 109 SdUsbConnect storage(MOUNT_NAME);
dkato 0:a1daffd30b6d 110
dkato 0:a1daffd30b6d 111 while (1) {
dkato 0:a1daffd30b6d 112 storage.wait_connect();
dkato 0:a1daffd30b6d 113 if (button0 == 0) {
dkato 0:a1daffd30b6d 114 wait_new_image(); // wait for image input
dkato 0:a1daffd30b6d 115 led1 = 1;
dkato 0:a1daffd30b6d 116 save_image_jpg(); // save as jpeg
dkato 0:a1daffd30b6d 117 led1 = 0;
dkato 0:a1daffd30b6d 118 }
dkato 0:a1daffd30b6d 119 }
dkato 0:a1daffd30b6d 120 }