epaper_display
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epaper_display [2011/02/24 15:03] steve_m [Driving the Motorola F3 e-paper display] sustain->retain |
epaper_display [2011/03/01 16:22] steve_m [Video] |
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| \\ By the way, since I mentioned the TI Locosto baseband: Maybe someone wants to reverse-engineer the [[http://bb.osmocom.org/trac/wiki/CalypsoRomloader#secure-RomloaderonCalypsoplus|serial rom-bootloader]] of this ARM7-based processor, so we can drive the display directly from the phone :-P | \\ By the way, since I mentioned the TI Locosto baseband: Maybe someone wants to reverse-engineer the [[http://bb.osmocom.org/trac/wiki/CalypsoRomloader#secure-RomloaderonCalypsoplus|serial rom-bootloader]] of this ARM7-based processor, so we can drive the display directly from the phone :-P | ||
| ===== Interfacing with the display ===== | ===== Interfacing with the display ===== | ||
| - | Normally, the baseband board and the display/keypad pcb are connected with a 32-pin connector (exact model unknown). Luckily there are pull-up resistors and capacitors for every needed signal, so I decided to solder some wires there, instead of directly to the connector. The schematics of this phone are floating around the web (just search for **f3_schem.rar**). | + | Normally, the baseband board and the display/keypad pcb are connected with a 32-pin connector (exact model unknown). Luckily there are pull-up resistors and capacitors for every needed signal, so I decided to solder some wires there, instead of directly to the connector. The schematics of this phone are floating around the web, just search for **f3_schem.rar**. |
| |{{:f3_wires_soldered.jpg?350|thin wires soldered to the display pcb}}|{{:f3_display_connector.jpg?436|the connector of the display}}| | |{{:f3_wires_soldered.jpg?350|thin wires soldered to the display pcb}}|{{:f3_display_connector.jpg?436|the connector of the display}}| | ||
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| |P1.5|SPI clock|16|SPI_CLK| | |P1.5|SPI clock|16|SPI_CLK| | ||
| |P1.6|SPI MOSI|17|SPI_MOSI| | |P1.6|SPI MOSI|17|SPI_MOSI| | ||
| + | |||
| + | Note: even though the MISO signal is connected in the original phone, there's no activity at all, so I left it unconnected. Also, DISPLAY_BUSY0 and 1 seem to be identical. | ||
| {{:msp430_epaper.jpg?300|Launchpad with connected display}} | {{:msp430_epaper.jpg?300|Launchpad with connected display}} | ||
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| A few notes on the video: | A few notes on the video: | ||
| - | * The timer was actually sped up by the factor of 10 for demonstration purposes, so 1 minute on the clock is actually 6 seconds in the video. | + | * The timer has been sped up by the factor of 10 for demonstration purposes, so 1 minute on the clock is actually 6 seconds in the video. |
| * Completely powering down the display also has its disadvantages. As you can see, the display needs to be initialized every time you power it up again (thus the flickering), which isn't needed when just disabling the 32KHz clock. | * Completely powering down the display also has its disadvantages. As you can see, the display needs to be initialized every time you power it up again (thus the flickering), which isn't needed when just disabling the 32KHz clock. | ||
| * The second row (showing 000000) is just a counter, counting the total hours, and is intended for a runtime test with a goldcap or CR2032 battery. | * The second row (showing 000000) is just a counter, counting the total hours, and is intended for a runtime test with a goldcap or CR2032 battery. | ||
epaper_display.txt ยท Last modified: 2011/07/27 23:48 by steve_m
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