I'm trying to get a 5" LCD working with my raspberry pi 3 and Android Things Developer Preview 4.1.
I've added this to my config.txt:
max_usb_current=1
hdmi_group=2
hdmi_mode=1
hdmi_mode=87
hdmi_cvt 800 480 60 6 0 0 0
All I get is a white screen with some artifacts:
It's not a cable issue, I can use the screen with my Windows PC just fine.
I've found some maybe relevant lines in logcat:
01-01 00:00:19.529 412-412/? I/SystemServiceManager: Starting com.android.server.display.DisplayManagerService
01-01 00:00:19.568 412-434/? I/DisplayManagerService: Display device added: DisplayDeviceInfo{"Built-in Screen": uniqueId="local:0", 800 x 480, modeId 1, defaultModeId 1, supportedModes [{id=1, width=800, height=480, fps=60.000004}], colorTransformId 1, defaultColorTransformId 1, supportedColorTransforms [{id=1, colorTransform=0}], HdrCapabilities android.view.Display$HdrCapabilities#192777c, density 160, 160.0 x 160.42105 dpi, appVsyncOff 0, presDeadline 17666666, touch INTERNAL, rotation 0, type BUILT_IN, state UNKNOWN, FLAG_DEFAULT_DISPLAY, FLAG_ROTATES_WITH_CONTENT, FLAG_SECURE, FLAG_SUPPORTS_PROTECTED_BUFFERS}
01-01 00:00:19.571 412-434/? I/DisplayManagerService: Display device changed state: "Built-in Screen", ON
01-01 00:00:23.990 412-434/? I/WindowManager: No existing display settings /data/system/display_settings.xml; starting empty
I've bought the screen from an ebay seller. It came with a dvd, and had a sample config.txt file, it suggests the same settings.
What am I doing wrong?
Related
I have a list of products, the list is below:
List<dynamic>products = [
{
"id": 3,
"name": "Apple MacBook Air 13.3-Inch 10th Gen Core i3-1.1GHz, 8GB RAM, 256GB SSD (MWTJ2) Space Gray 2020",
"price": 126000,
"descriptions": "Processor\tIntel Core i3-1000NG4 Processor (4M Cache, 1.10 GHz up to 3.20 GHz)\r\n\r\nMemory\t 8GB 3733MHz LPDDR4X onboard RAM\r\n\r\nStorage\t 256GB SSD\r\nGraphics\tIntel Iris Plus Graphics; **Support for Thunderbolt 3–enabled external graphics processors (eGPUs)\r\n\r\nDisplay\t 13.3-inch (diagonal) Retina LED-backlit display with IPS technology; 2560-by-1600 native resolution at 227 pixels per inch with support for millions of colors\r\n\r\nAdapter\t 30W USB-C Power Adapter; USB-C power port\r\n\r\nBattery\tUp to 10 hours battery back (Video & web browsing up to 05 hours depending on resolution) Built-in 49.9 watt-hours lithium-polymer battery\r\n\r\nOperating System\tmacOS\r\n\r\nNetworking\t 802.11ac Wi-Fi wireless networking; IEEE 802.11a/b/g/n compatible\r\n\r\nTouchpad\t Multi-Touch gestures\r\n\r\nKeyboard\tBacklit Keyboard - US English Retina is equipped with: 78 keys (ANSI specification) or 79 keys (ISO specification), including 12 function keys and 4 direction keys arranged in an \"inverted T\" shape. Ambient light sensor Force touchpad brings precise cursors Control and pressure-sensing functions, support forceful long-press, acceleration function, pressure-sensitive drawing, and multi-touch gestures\r\n\r\nBluetooth\tBluetooth 5.0 wireless technology\r\n\r\nAudio\t Stereo speakers; Wide stereo sound; Support for Dolby Atmos playback; Three-mic array with directional beamforming; 3.5 mm headphone jack\r\n\r\nOptical Drive None\r\n\r\nSoftware\tFinal Cut Pro X; Logic Pro X\r\n\r\nWebCam\t720p FaceTime HD camera\r\n\r\nFingerprint\tYes\r\n\r\nDisplay Touch\tDisplay WithTouch ID sensor\r\n\r\nPorts & Connectors\t2 x Thunderbolt 3 (Supports DisplayPort and Power Delivery); Thunderbolt (up to 40Gb / s); USB 3.1 Gen 2 (up to 10Gb / s; 1 x HDMI; 1 x VGA; 1 x 3.5 mm Headphone Output\r\n\r\nColor\tSpace Gray\r\n\r\nDimensions (W x D x H)\tThickness: 0.41 to 1.61 cm (0.16 to 0.63 inches); Width: 30.41 cm (11.97 inches); Depth: 21.24 cm (8.36 inches)\r\n\r\nWeight\t1.29 kg (2.8 lbs)\r\n\r\nIncluded in the Box\tMacBook Air; 30W USB-C Power Adapter; USB-C Charge Cable (2 m)\r\n\r\nWarranty \t01 year International Limited Warranty (Terms & Condition Apply As Per Apple)",
"image": "/images/macbook_IU3NvNF.jpg",
"created_at": "2022-08-19T17:42:13.118095Z",
"updated_at": "2022-08-19T17:42:13.118095Z",
"stock": true,
"category": 1,
"user": "mosta"
},
{
"id": 2,
"name": "MSI Modern 14 B10MW Core i3 10th Gen 14\" Full HD Laptop",
"price": 50890,
"descriptions": "Processor Intel Core i3 10110U Processor (4MB Cache, 2.1Ghz up to 4.1Ghz)\r\n\r\nDisplay 14.0\" FHD (1920x1080), IPS-Level Display\r\n\r\nMemory 4GB 2666MHz DDR4 RAM, (Suppoorted Up to 16GB)\r\n\r\nStorage 256GB NVMe SSD (Supported Up to 1TB)\r\n\r\nGraphics Intel UHD Graphics\r\n\r\nOperating System Free Dos\r\nBattery 39.3Whr\r\n\r\nAdapter 65W adapter\r\n\r\nInput Devices\r\nKeyboard Backlight Keyboard\r\n\r\nWebCam HD type (30fps#720p)\r\nCard Reader 1x Micro SD\r\n\r\nNetwork & Wireless Connectivity\r\nWi-Fi 802.11 ac Wi-Fi\r\n\r\nBluetooth Bluetooth v5\r\n\r\nPorts, Connectors & Slots\r\nUSB (s) 2x Type-A USB2.0\r\n\r\n1x Type-C USB3.2 Gen2\r\n\r\nHDMI 1x (4K # 30Hz) HDMI\r\n\r\nAudio Jack Combo 1x Mic-in/Headphone-out Combo Jack\r\n\r\nExtra RAM Slot NO\r\n\r\nExtra M.2 Slot NO\r\n\r\nPhysical Specification\r\nDimensions (W x D x H) 319 x 220.2 x 16.9 mm\r\n\r\nWeight 1.3 kg\r\n\r\nColor(s) Carbon Gray\r\n\r\nWarranty\r\nManufacturing Warranty 02 Year",
"image": "/images/msi_sCwzOcI.jpeg",
"created_at": "2022-08-19T17:41:53.358014Z",
"updated_at": "2022-08-19T17:41:53.358014Z",
"stock": true,
"category": 1,
"user": "mosta"
},
{
"id": 1,
"name": "iPhone 13 Pro Max",
"price": 169000,
"descriptions": "First Release\tSeptember 24, 2021\r\n\r\nColors\tGraphite, Gold, Silver, Sierra Blue\r\n\r\nNetwork\t2G, 3G, 4G, 5G\r\n\r\nSIM\tNano / Electronic SIM\r\n\r\nWLAN\t✅ dual-band, Wi-Fi hotspot\r\n\r\nBluetooth\t✅ v5.0, A2DP, LE\r\n\r\nGPS\t✅ A-GPS, GLONASS, GALILEO, BDS, QZSS\r\n\r\nRadio\t✖\r\n\r\nUSB\tLightning, USB 2.0\r\n\r\nOTG\t✅\r\n\r\nUSB Type-C\t✖ (Proprietary reversible connector)\r\n\r\nNFC\t✅\r\n\r\nStyle\tNotch\r\n\r\nMaterial\t Gorilla Glass front & back, stainless steel frame\r\n\r\nWater Resistance\t✅ IP68 dust/water resistant (up to 6m for 30 mins)\r\n\r\nDimensions\t160.8 x 78.1 x 7.7 mmillimeters\r\n\r\nWeight\t240 grams\r\n\r\nSize\t6.7 inches\r\n\r\nResolution\t1284 x 2778 pixels (458 ppi)\r\n\r\nTechnology\tSuper Retina XDR OLED Touchscreen\r\n\r\nProtection\t✅ Scratch-resistant ceramic glass, oleophobic coating\r\n\r\nFeatures\tDolby Vision, HDR10, 1200 nits (max.), 120Hz, true-tone, wide color gamut\r\n\r\nResolution\tQuad 12+12+12 Megapixel + TOF 3D LiDAR scanner\r\n\r\nFeatures\tDual Pixel PDAF, sensor-shift OIS, dual-LED flash, ultrawide, depth, telephoto, 3x optical zoom & more\r\n\r\nVideo Recording\t4K (2160p), Dolby Vision HDR, ProRes, Cinematic mode, stereo sound rec.\r\n\r\nResolution\tDual 12 Megapixel + SL 3D\r\n\r\nFeatures\tF/2.2, HDR, 1/3.6″, depth / biometrics sensor\r\n\r\nVideo Recording\t4K (2160p), gyro-EIS\r\n\r\nType and Capacity\tLithium-ion 4352 mAh (non-removable)\r\n\r\nFast Charging\t✅ 27W Fast Charging (50% in 30 minutes)\r\n\r\nUSB Power Delivery 2.0\r\n\r\nWireless Charging\t✅ Fast Wireless Charging (15W MagSafe, 7.5W Qi magnetic)\r\n\r\nOperating System\tiOS 15\r\n\r\nChipset\tApple A15 Bionic (5 nm)\r\n\r\nRAM\t6 GB\r\n\r\nProcessor\tHexa-core, up to 3.22 GHz\r\n\r\nGPU\tApple GPU (5-core graphics)",
"image": "/images/iPhone13promax_YiZ3ktK.jpg",
"created_at": "2022-08-19T17:41:27.837767Z",
"updated_at": "2022-08-19T17:41:27.837767Z",
"stock": true,
"category": 2,
"user": "mosta"
}
]
I want to search through the above list by product name. And also want a make separate list contain one single map.
If i search "apple" the result should be:
List<dynamic> searchResult = [
{
"id": 3,
"name": "Apple MacBook Air 13.3-Inch 10th Gen Core i3-1.1GHz, 8GB RAM, 256GB SSD (MWTJ2) Space Gray 2020",
"price": 126000,
"descriptions": "Processor\tIntel Core i3-1000NG4 Processor (4M Cache, 1.10 GHz up to 3.20 GHz)\r\n\r\nMemory\t 8GB 3733MHz LPDDR4X onboard RAM\r\n\r\nStorage\t 256GB SSD\r\nGraphics\tIntel Iris Plus Graphics; **Support for Thunderbolt 3–enabled external graphics processors (eGPUs)\r\n\r\nDisplay\t 13.3-inch (diagonal) Retina LED-backlit display with IPS technology; 2560-by-1600 native resolution at 227 pixels per inch with support for millions of colors\r\n\r\nAdapter\t 30W USB-C Power Adapter; USB-C power port\r\n\r\nBattery\tUp to 10 hours battery back (Video & web browsing up to 05 hours depending on resolution) Built-in 49.9 watt-hours lithium-polymer battery\r\n\r\nOperating System\tmacOS\r\n\r\nNetworking\t 802.11ac Wi-Fi wireless networking; IEEE 802.11a/b/g/n compatible\r\n\r\nTouchpad\t Multi-Touch gestures\r\n\r\nKeyboard\tBacklit Keyboard - US English Retina is equipped with: 78 keys (ANSI specification) or 79 keys (ISO specification), including 12 function keys and 4 direction keys arranged in an \"inverted T\" shape. Ambient light sensor Force touchpad brings precise cursors Control and pressure-sensing functions, support forceful long-press, acceleration function, pressure-sensitive drawing, and multi-touch gestures\r\n\r\nBluetooth\tBluetooth 5.0 wireless technology\r\n\r\nAudio\t Stereo speakers; Wide stereo sound; Support for Dolby Atmos playback; Three-mic array with directional beamforming; 3.5 mm headphone jack\r\n\r\nOptical Drive None\r\n\r\nSoftware\tFinal Cut Pro X; Logic Pro X\r\n\r\nWebCam\t720p FaceTime HD camera\r\n\r\nFingerprint\tYes\r\n\r\nDisplay Touch\tDisplay WithTouch ID sensor\r\n\r\nPorts & Connectors\t2 x Thunderbolt 3 (Supports DisplayPort and Power Delivery); Thunderbolt (up to 40Gb / s); USB 3.1 Gen 2 (up to 10Gb / s; 1 x HDMI; 1 x VGA; 1 x 3.5 mm Headphone Output\r\n\r\nColor\tSpace Gray\r\n\r\nDimensions (W x D x H)\tThickness: 0.41 to 1.61 cm (0.16 to 0.63 inches); Width: 30.41 cm (11.97 inches); Depth: 21.24 cm (8.36 inches)\r\n\r\nWeight\t1.29 kg (2.8 lbs)\r\n\r\nIncluded in the Box\tMacBook Air; 30W USB-C Power Adapter; USB-C Charge Cable (2 m)\r\n\r\nWarranty \t01 year International Limited Warranty (Terms & Condition Apply As Per Apple)",
"image": "/images/macbook_IU3NvNF.jpg",
"created_at": "2022-08-19T17:42:13.118095Z",
"updated_at": "2022-08-19T17:42:13.118095Z",
"stock": true,
"category": 1,
"user": "mosta"
}]
How to approach to make this step?
import 'package:collection/collection.dart';
and use firstWhereOrNull;
example:
searchArray(String searchValue){
var test =
products.firstWhereOrNull((element) => element['name'].contains(searchValue));
print(test); //print just first object whos name property contains "MSI"
}
Or
searchArray(String searchValue) {
var test =
products.where((element) => element['name'].toString().contains(searchValue));
if (test != null) {
for (var testItem in test) {
print(testItem); //print all maps whos contains sV
}
}
}
Here is one of approach you can use to search some query through the list and add the result in another list using for in iterables
void search(String query) {
List<dynamic> searchResult = [];
for (final product in products) {
if (product["name"].toLowerCase().contains(query.toLowerCase())) {
searchResult.add(product);
print(searchResult);
return;
}
}
}
full code here
Or you can use firstWhereOrNull in dart collection as mentioned by Kendruu
I'm developing a hobby OS ,I want to draw something in vga mode when OS is in protected mode. I'm using the multiboot2 to guide my OS to step in and I setup the VGA as 1024 X 768 X 32 ,then I paint the whole screen like this :
memset ((void *) 0xA0000,0x0F,1024 * 768 * 4);
but encounted an exception,I found that VGA buffer address starts at 0xA00000 but ends at 0xB0000 ,totally 64K, the whole 1024 * 768 * 32 screen need rather than the 64K buffer.
So,How to fill the whole screent ? Any help would be appreciated ...
I desperately try to get the PRU on my BBB working. By working I mean that I would want to use the pins P8 39-46 (GPIO2[6-13]) as a fast output controlled by the PRU.
I installed the debian for BBB (2 weeks ago, should be current) on SD.
Then I started with the following article: http://www.element14.com/community/community/designcenter/single-board-computers/next-gen_beaglebone/blog/2013/05/22/bbb--working-with-the-pru-icssprussv2
doing so, I got the PRU working with the LED example as well as with pin P8[12].
Now I try to get the other pins working. I started all over by just making a little change to the original am335x-boneblack.dtb. I just activated the PRU.
I did not change the LED heartbeat as well as pin P8.12.
Then I disabled HDMI in uEnv.txt
My "slots" look like this now:
0: 54:PF---
1: 55:PF---
2: 56:PF---
3: 57:PF---
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
5: ff:P-O-- Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
6: ff:P-O-- Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN
I stumbled upon this post here: https://groups.google.com/forum/#!topic/beagleboard/JRG36bOURfk
EXACTLY what I would want to have, so I took the dts ( the second one) , compiled it, copied it to /lib/firmware and loaded it. "slots" says the overlay was loaded.
0: 54:PF---
1: 55:PF---
2: 56:PF---
3: 57:PF---
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
5: ff:P-O-- Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
6: ff:P-O-- Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN
7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-PRU-IO
BB-PRU-IO is me.
dmesg says:
... part_number 'BB-PRU-IO', version 'N/A'
... slot #7: generic override
... bone: Using override eeprom data at slot 7
... slot #7: 'Override Board Name,00A0,Override Manuf,BB-PRU-IO'
... slot #7: Requesting part number/version based 'BB-PRU-IO-00A0.dtbo
... slot #7: Requesting firmware 'BB-PRU-IO-00A0.dtbo' for board-name 'Override Board Name', version '00A0'
... slot #7: dtbo 'BB-PRU-IO-00A0.dtbo' loaded; converting to live tree
... slot #7: #2 overlays
... slot #7: Applied #2 overlays.
Looking good I would say.
The problem is the pinmux does not seam to be impressed:
cat pins | grep 8a4
=> pin 41 (44e108a4) 0000002f pinctrl-single
This is MODE 7 (GPIO Out). Not what I wanted. For all of pins I intended to switch to PRU Mode 5.
Now I tried the delivered dtbo's for the PRU 01,02 in /lib/firmware
PRU-01.dtbo seems to be a fitting example. Only the Pin is different (P9.27).
I loaded it and changed the PRU code example.
The pins did not show the expected result:
pin 105 (44e109a4) 00000027 pinctrl-single
When I run the modified testprogram from the first articel my osci shows a flatline.
I tried PRU-02.dtbo.
At least the pins showed the expected result:
pin 105 (44e109a4) 00000025 pinctrl-single
When I start my little test program I get a "bus error"
dmesg has several lines. the important ones I would say are:
[ 119.258978] WARNING: at arch/arm/mach-omap2/omap_hwmod.c:2096 _enable+0x101/0x174()
[ 119.259004] omap_hwmod: pruss: enabled state can only be entered from initialized, idle, or disabled state
[ 119.259027] Modules linked in: g_multi libcomposite btusb bluetooth rfkill uio_pruss mt7601Usta(O)
.... several trace messages
[ 119.272382] pru-rproc 4a300000.prurproc: #8 PRU interrupts registered
[ 119.272445] pru-rproc 4a300000.prurproc: Failed to read events array
[ 119.287545] pru-rproc: probe of 4a300000.prurproc failed with error -22
PRU-02 does more than PRU-01 (what I do not understand). And it does not seem to work for me.
Now I am kind of helpless.
Any ideas on that?
EDIT:
I did what you should not do. I changed the pinmux setting in the am335x-boneblack.dtb file. I just added:
0xA0 0x05
0xA4 0x05
0xA8 0x05
0xAC 0x05
0xB0 0x05
0xB4 0x05
0xB8 0x05
0xBC 0x05
to pinmux_userled_pins {
pinctrl-single,pins = <
Now it works, but I am not happy. I still would appreciate a regular overlay file.
OK I got it working:
just enable the pruss in the am335x-boneblack.dtb (convert to dts. do the changes as described in the article mentioned in the original post)
Got to the website : http://kilobaser.com/blog/2014-07-28-beaglebone-black-devicetreeoverlay-generator#dtogenerator and let the site create dts files for the various pins in my case P8 46-39. Using a single DTS(DTBO) File for each individual pin works but requires 8 dtbos loaded => I moved all of them into one DTS File.
this is it:
/dts-v1/;
/plugin/;
/{
compatible = "ti,beaglebone", "ti,beaglebone-black";
part_number = "BS_PINMODE_PRU_OUT";
exclusive-use =
"P8.46",
"P8.45",
"P8.44",
"P8.43",
"P8.42",
"P8.41",
"P8.40",
"P8.39",
"pr1_pru1_pru_r30_6",
"pr1_pru_pru1_r30_7",
"pr1_pru1_pru_r30_4",
"pr1_pru1_pru_r30_5",
"pr1_pru1_pru_r30_2",
"pr1_pru1_pru_r30_3",
"pr1_pru1_pru_r30_0",
"pr1_pru1_pru_r30_1";
fragment#0 {
target = <&am33xx_pinmux>;
__overlay__ {
bs_pinmode_pru_out: pinmux_bs_pinmode_pru_out {
pinctrl-single,pins = <0x0a4 0x5 0x0a0 0x5 0x0ac 0x5 0x0a8 0x5 0x0b4 0x5 0x0b0 0x5 0x0bc 0x5 0x0b8 0x5>;
};
};
};
fragment#1 {
target = <&ocp>;
__overlay__ {
bs_pinmode_pru_out_pinmux {
compatible = "bone-pinmux-helper";
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&bs_pinmode_pru_out>;
};
};
};
};
I named the file bspm_pru_out-00A0.dts, compiled it to bspm_pru_out-00A0.dtbo and placed it it in the /lib/firmware.
You can load it via /boot/uEnv.txt or via echo... in a rc.local file... whatever you like.
I'm using QtEmbedded (4.8.0) on an ARM display device with 16bits color depth on the framebuffer (/dev/fb0). At this scenario we are getting the colors bits RED and BLUE exchanged.
We are using the following compile flags:
./configure -embedded arm -xplatform qws/linux-arm-gnueabi-g++ -prefix /home/rchaves/Toolchain -release -opensource -shared -fast -depths 16 -largefile -no-exceptions -no-accessibility -stl -no-sql-mysql -no-sql-psql -no-sql-oci -no-sql-odbc -no-sql-tds -no-sql-db2 -no-sql-sqlite -no-sql-sqlite2 -no-sql-ibase -no-qt3support -no-xmlpatterns -no-multimedia -no-audio-backend -no-phonon-backend -no-svg -no-webkit -no-javascript-jit -no-script -no-scripttools -no-declarative -no-declarative-debug -qt-zlib -qt-libtiff -qt-libpng -qt-libmng -qt-libjpeg -no-openssl -no-nis -no-cups -iconv -no-pch -no-dbus -qt-freetype -no-opengl -qt-gfx-linuxfb -qt-kbd-linuxinput -qt-mouse-tslib -nomake demos -nomake examples
And the following parameters to execute the application:
QWS_DISPLAY=LinuxFb:/dev/fb0:depth=16 ./app -qws
Here there are the application framebuffer (samples) log:
The framebuffer device was opened successfully.
Fixed screen info:
id: DISP3 BG
smem_start: 0x93800000
smem_len: 7864320
type: 0
type_aux: 0
visual: 2
xpanstep: 1
ypanstep: 1
ywrapstep: 0
line_length: 2048
mmio_start: 0x0
mmio_len: 0
accel: 0
The framebuffer device was mapped to memory successfully.
Successfully switched to graphics mode.
Variable screen info:
xres: 1024
yres: 768
xres_virtual: 1024
yres_virtual: 3840
yoffset: 0
xoffset: 0
bits_per_pixel: 16
grayscale: 0
red: offset: 0, length: 5, msb_right: 0
green: offset: 5, length: 6, msb_right: 0
blue: offset: 11, length: 5, msb_right: 0
transp: offset: 0, length: 0, msb_right: 0
nonstd: 0
activate: 64
height: -1
width: -1
accel_flags: 0x0
pixclock: 15385
left_margin: 157
right_margin: 157
upper_margin: 16
lower_margin: 15
hsync_len: 5
vsync_len: 1
sync: 0
vmode: 0
Frame Buffer Performance test...
Average: 43020 usecs
Bandwidth: 174.338 MByte/Sec
Max. FPS: 23.245 fps
Will draw 3 rectangles on the screen,
they should be colored red, green and blue (in that order).
Done.
Better late than never. I had this exact problem with a SAM5 processor using Qt5.5.1 and the linuxfb plugin. Reconfigure or recompile the Qt5 framework will NOT solve the problem.
Apparently the LinuxFB plugin does not support the BGR format. There is an open bug tracking this issue. Check the determineFormat function in ../src/plugins/platforms/linuxfb/qlinuxfbscreen.cpp, in which you will find out that the ImageFormats are hardcoded to **RGB no matter what kind of framebuffer info was provided.
To solve the problem, applying the patch attached to the bug may help you to resolve this issue.
I said "may" because my framebuffer driver was falsely reporting it is in the RBG format. So watch out for that. If that is the case, just hardcode the swapRgb flag until you fix your framebuffer driver.
Update: Try setting -depths generic in ./configure and run with -display linuxfb:genericcolors. This is as per this thread which discusses the problem.
Old answer: It sounds like your endian-ness of the display is swapped.
As per the documentation, you can try to pass the littleendian option to the display string. The other option is to consult the linux fb documentation about performing endian swaps.
I know that some of this data is viewable in iPhoto, such as latitude, longitude, and altitude, but is there more than this available? More specifically I am wanting to get the direction of the image as well, which is part of the EXIF format. Or does something other than geotagging need to be enabled (something to do with the compass)?
I suggest installing the command line tool exif. You can get it through Mac Ports by executing port install exif as root.
Here's an example of the exif info stored in a photo I took on an iPod Touch:
bash:$ exif Oct\ 9\,\ 2010/IMG_0038.JPG
EXIF tags in 'Oct 9, 2010/IMG_0018.JPG' ('Motorola' byte order):
--------------------+----------------------------------------------------------
Tag |Value
--------------------+----------------------------------------------------------
Manufacturer |Apple
Model |iPod touch
Orientation |right - top
x-Resolution |72.00
y-Resolution |72.00
Resolution Unit |Inch
Software |4.1
Date and Time |2010:10:06 17:43:43
YCbCr Positioning |centered
Compression |JPEG compression
x-Resolution |72.00
y-Resolution |72.00
Resolution Unit |Inch
Exposure Time |1/120 sec.
FNumber |f/2.4
Exposure Program |Normal program
ISO Speed Ratings |320
Exif Version |Exif Version 2.21
Date and Time (origi|2010:10:06 17:43:43
Date and Time (digit|2010:10:06 17:43:43
Components Configura|Y Cb Cr -
Shutter speed |6.91 EV (1/120 sec.)
Aperture |2.53 EV (f/2.4)
Metering Mode |Average
Flash |No flash function
Focal Length |3.9 mm
FlashPixVersion |FlashPix Version 1.0
Color Space |sRGB
PixelXDimension |640
PixelYDimension |480
Sensing Method |One-chip color area sensor
Exposure Mode |Auto exposure
White Balance |Auto white balance
Scene Capture Type |Standard
Sharpness |Normal
North or South Latit|N
Latitude |44.00, 22.12, 0.00
East or West Longitu|W
Longitude |56.00, 23.98, 0.00
GPS time (atomic clo|17:43:41.60
--------------------+----------------------------------------------------------
EXIF data contains a thumbnail (10215 bytes).
I don't think the iPod Touch has the same capabilities as an iPhone regarding GPS.
It looks like an iPhone will have the data 'GPSImg Direction' as well, which sounds like what you want. I don't think you have to do anything special to enable it, as I haven't found much info on this through searching.
Okay, good news :). The direction is stored in GPS Img Direction. Here's what I was able to get from a photo taken from an iphone (with location services and compass turned on) using the ExifTool mentioned by #rwong.
ExifTool Version Number : 8.34
File Name : photo.JPG
Directory : C:/Documents and Settings/user/My Document
s/Downloads
File Size : 349 kB
File Modification Date/Time : 2010:10:19 14:05:39-06:00
File Permissions : rw-rw-rw-
File Type : JPEG
MIME Type : image/jpeg
JFIF Version : 1.01
Exif Byte Order : Big-endian (Motorola, MM)
Image Description : Back Camera
Make : Apple
Camera Model Name : iPhone
Orientation : Horizontal (normal)
X Resolution : 72
Y Resolution : 72
Resolution Unit : inches
Software : 4.0.1
Modify Date : 2010:10:19 14:00:52
Y Cb Cr Positioning : Centered
Exposure Time : 1/146
F Number : 2.4
Exposure Program : Program AE
ISO : 80
Exif Version : 0221
Date/Time Original : 2010:10:19 14:00:52
Create Date : 2010:10:19 14:00:52
Shutter Speed Value : 1/146
Aperture Value : 2.4
Metering Mode : Average
Flash : Off, Did not fire
Focal Length : 3.9 mm
Subject Area : 1295 967 699 696
Flashpix Version : 0100
Color Space : sRGB
Exif Image Width : 1296
Exif Image Height : 968
Sensing Method : One-chip color area
Exposure Mode : Auto
White Balance : Auto
Scene Capture Type : Standard
Sharpness : Hard
GPS Latitude Ref : North
GPS Longitude Ref : West
GPS Time Stamp : 14:00:46.81
GPS Img Direction Ref : True North
GPS Img Direction : 32.52336904
Image Width : 1296
Image Height : 968
Encoding Process : Baseline DCT, Huffman coding
Bits Per Sample : 8
Color Components : 3
Y Cb Cr Sub Sampling : YCbCr4:2:0 (2 2)
Aperture : 2.4
GPS Latitude : 45 deg 14' 58.20" N
GPS Longitude : 121 deg 39' 4.80" W
GPS Position : 45 deg 14' 58.20" N, 121 deg 39' 4.80" W
Image Size : 1296x968
Shutter Speed : 1/146
Focal Length : 3.9 mm
Light Value : 10.0
you don't need an 'external' tool to view all the EXIF-infos, with the iPhone-app iMetaPhoto you can show all metainfos (EXIF, TIFF, IPTC, GPS, AUXiliary EXIF,...) and (the best of all) you can modify the most of them, esp. you can modify GPS ImgDirection.