tiacx1xx
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tiacx1xx [2010/08/10 22:17] steve_m |
tiacx1xx [2011/01/09 03:21] |
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| - | ====== Texas Instruments ACX100/ACX111 ====== | ||
| - | The TI ACX100/ACX111 is an already somewhat outdated 802.11 wireless LAN chipset, which is based on an ARM7TDMI core. | ||
| - | There is an [[http://acx100.sourceforge.net/|open source project]] which develops a Linux kernel driver. | ||
| - | |||
| - | ^ Chip ^ ACX100 ^ ACX111 ^ | ||
| - | | TI name | [[http://focus.ti.com/general/docs/bcg/bcgprodcontent.tsp?templateId=6116&navigationId=12147&path=templatedata/cm/product/data/acx100|TNETW1100]]| [[http://focus.ti.com/general/docs/bcg/bcgprodcontent.tsp?templateId=6116&navigationId=12246&contentId=4039|TNETW1130]]| | ||
| - | | standard | IEEE802.11b+ | IEE802.11g+ | | ||
| - | | speed | 22Mbps | 54Mbps | | ||
| - | |||
| - | For a full list of devices see [[http://acx100.sourceforge.net/matrix.html|here]]. | ||
| - | |||
| - | ====== ACX100 JTAG Port ====== | ||
| - | |||
| - | When taking apart a Level1 WBR-2401B router, I noticed that the used ACX100 CardBus-card has a 6-pin header. | ||
| - | |||
| - | {{:acx100_jtag.jpg?800|ACX100 card with JTAG header}} | ||
| - | |||
| - | As it turned out by try and error, it is connected to the JTAG pins of the ACX100 chip. Once it was clear that the first 2 pins are GND and VDD (+3.3V), I tried all combinations of the JTAG signals. | ||
| - | |||
| - | ^ Pin ^ 1 ^ 2 ^ 3 ^ 4 ^ 5 ^ 6 ^ | ||
| - | |signal | GND | VDD | TCK | TDI | TDO | TMS | | ||
| - | |||
| - | ==== OpenOCD ==== | ||
| - | |||
| - | I used [[http://openocd.berlios.de/web/|OpenOCD]] to connect to the [[http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0210c/Chdeaegh.html|EmbeddedICE]] unit of the ARM7TDMI core. | ||
| - | Since the ACX1xx contains a pretty standard TI TMS470 ARM7 core, it uses the TMS470 IDCODE: | ||
| - | |||
| - | <code> | ||
| - | Info : clock speed 6000 kHz | ||
| - | Info : JTAG tap: acx1xx.cpu tap/device found: 0x3100e02f (mfg: 0x017, part: 0x100e, ver: 0x3) | ||
| - | Info : Embedded ICE version 1 | ||
| - | Info : acx1xx.cpu: hardware has 2 breakpoint/watchpoint units | ||
| - | </code> | ||
| - | |||
| - | This is the used configuration file for OpenOCD (using the [[http://wiki.openmoko.org/wiki/Debug_Board_v3|OpenMoko Debug Board]]) as JTAG interface: | ||
| - | |||
| - | <file - acx1xx.cfg> | ||
| - | interface ft2232 | ||
| - | ft2232_device_desc "Debug Board for Neo1973 A" | ||
| - | ft2232_layout "jtagkey" | ||
| - | ft2232_vid_pid 0x1457 0x5118 | ||
| - | |||
| - | reset_config trst_and_srst | ||
| - | jtag_khz 6000 | ||
| - | |||
| - | jtag newtap acx1xx cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id 0x3100e02f | ||
| - | target create acx1xx.cpu arm7tdmi -chain-position acx1xx.cpu -endian little -variant arm7tdmi | ||
| - | </file> | ||
tiacx1xx.txt ยท Last modified: 2011/01/09 03:21 (external edit)
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