Cameras: Difference between revisions

← Older edit

@@ Line 6: / Line 6: @@
 [[Image:DSiCameraSampleImage.jpg|200px|thumb|right|A picture taken with the DSi's camera.]]
+Aptina MT9V113
 * 0.3 Megapixel
 * 640*480 VGA
 * No zoom and no flash.
-* Photos saved in JPG format (saved in [[DCIM/]] folder on the SD/SDHC or in the internal memory)
 == Applications/Games compatible ==
@@ Line 33: / Line 34: @@
 * Castle of Magic (DSiWare)
 * Photo Dojo (DSiWare)
+=== Homebrew ===
+* [[dsi-camera]]
+* [[dsidl]]
 == Camera registers (ARM7) ==
@@ Line 50: / Line 55: @@
 |  0x04004200
 |  2
-|  REG_CAMRST
+|  REG_CAM_MCNT
 |-
 |  0x04004202
 |  2
-|  REG_CAMCNT
+|  REG_CAM_CNT
 |-
 |  0x04004204
 |  4
-|  REG_CAMDATA
+|  REG_CAM_DATA
 |-
 |  0x04004210
 |  4
-|  REG_CAM_?
+|  REG_CAM_SOFS
 |-
 |  0x04004214
 |  4
-|  REG_CAM_?
+|  REG_CAM_EOFS
 |}
-=== REG_CAMRST ===
+=== REG_CAM_MCNT ===
 {| class="wikitable" border="1"
 |-
@@ Line 75: / Line 80: @@
 !  DESCRIPTION
 |-
-| 15-0
+| 15-8
-| ?
+| unused
+|-
+| 7
+| INI
+|-
+| 6
+| V28 rail enable
+|-
+| 5
+| VIO (1.8V IO voltage) rail enable
+|-
+| 4
+| V18 (1.8V core voltage) rail enable
+|-
+| 3
+| IRCLK
+|-
+| 2
+| SYNC
+|-
+| 1
+| RST
+|-
+| 0
+| STDBY
 |}
@@ Line 88: / Line 117: @@
 |-
 | 0-3
-| ?
+| NLINES
 |-
 | 4
-| IRQ error flag
+| IRQ FIFO-error flag
 |-
 | 5
-| Resets cameras when set?
+| flush
 |-
 | 7-6
 | ?
 |-
-| 9-8
+| 8-9
-| Set to 2(bit9 set) during init, cleared to zero on shutdown
+| IREQVS
 |-
 | 10
-| Set to 1 during init, 0 on cameras shutdown
+| IREQBE: Set to 1 during init, 0 on cameras shutdown
 |-
 | 11
-| Set to 1 during init, 0 on cameras shutdown
+| IE: Set to 1 during init, 0 on cameras shutdown
 |-
 | 12
@@ Line 112: / Line 141: @@
 |-
 | 13
-| Set during initialization?
+| YUV2RGB
 |-
 | 14
-| Cleared during initialization?
+| TRIMEN
 |-
 | 15
-| Enable
+| data transfer enable
 |}
@@ Line 124: / Line 153: @@
 === REG_CAMDATA ===
 {| class="wikitable" border="1"
 |-
-!  BIT
+!
-!  DESCRIPTION
+! BIT
+! DESCRIPTION
+|-
+! rowspan=4 | YUV422
+| 0-7
+| First pixel's luminance (Y)
+|-
+| 8-15
+| Both pixels' blue (U)
+|-
+| 16-23
+| Second pixel's luminance (Y)
+|-
+| 24-31
+| Both pixels' red (V)
+|-
+! rowspan=8 | RGB555
+| 0-4
+| First pixel's red
+|-
+| 5-9
+| First pixel's green
+|-
+| 10-14
+| First pixel's blue
+|-
+| 15
+| First pixel's alpha (always 1)
+|-
+| 16-20
+| Second pixel's red
+|-
+| 21-25
+| Second pixel's green
+|-
+| 26-30
+| Second pixel's blue
 |-
-| 31-0
+| 31
-| RGB555 video data converted by internal-cameras DSP
+| Second pixel's alpha (always 1)
 |}
-For retrieving camera video data, [[NDMA]] with arm9 startup mode 11(camera) is used with this src register. The NDMA frame transfer is started when the cameras [[Interrupts|IRQ]] was thrown. Supported internal-cameras DSP final resolutions are 256x192 and 640x480, the corresponding frame transfer lengths are 0x18000 and 0x96000.(The 256x192 final resolution is converted by the internal-cameras DSP from the camera resolution)
+For retrieving camera video data, [[NDMA]] with arm9 startup mode 11(camera) is used with this src register. The NDMA frame transfer is started when the cameras [[Interrupts|IRQ]] was thrown. Supported internal-cameras DSP final resolutions are 256x192 and 640x480, the corresponding frame transfer lengths are 0x18000 and 0x96000. (The 256x192 final resolution is converted by the internal-cameras DSP from the camera resolution)
+The video data can be transferred as the camera's native YUV422 for higher quality or automatically converted to the same RGB555 as the 2D engine bitmap format. No official program uses the YUV mode, but it has been used in the homebrew [[dsi-camera]].
 == See also ==