On Wed, Aug 31, 2011 at 9:46 PM, parth shah <parthmshah2...@gmail.com> wrote: > Hi Gil, > > Thanks for that response. Just before few minutes i tried that and i was > surprised to know that even after changing the baudrate i'm getting 8.06uS > pulse width. > > which means even i'm trying hciattach /dev/ttymxc1 texas 9600 noflow but the > UART packet is going out at baudrate of 115200(8.06uS).
The initial baud-rate is supposed to be 115200, If the chip supports something else, then hciattach has an option to have a different initial baud-rate "-s". In this case the initial speed is supposed to be 115200 though... That's why you see the first command - which is read chip version goes out at 115200. > > How can i make a change in this? > > Also how can i change settings of UART means how can i use different UART > then what i'm using for BT? Where to make change for that? > > Other Observation: > Is there any power up sequence i have to take care? > > Our Power up sequence says " BT_EN should go high for 10ms then make it low > and time between BT_EN high and HCI_RTS should be 100 ms". I suppose it should be high for it to be powered - and go low only when it to be powered off. The RTS is for it to be able to sample Rx - this might not matter in this case - Since there would be some significant delay between the BT_EN going high and you send the chip version read via hciattach. > How can i provide such small delays from U-boot? > > Thanks and Regards, > Parth > > > > On Wed, Aug 31, 2011 at 7:27 PM, Gil Zhaiek <gilzha...@gmail.com> wrote: >> >> One more thing - try a different baud rate (using a different bts >> file). >> Try 115200 bts - because you see that this works. >> >> Gil >> >> On Aug 30, 11:42 pm, parth shah <parthmshah2...@gmail.com> wrote: >> > Hi Pavan, >> > >> > We are using imx515 platform from freescale. >> > >> > We have pulled up connected with BT_EN with 1.8V. and BT_EN is connected >> > to >> > GPIO. >> > >> > We are making sure that before any BT activity BT_EN should go high. >> > >> > Is there any other reason? >> > >> > Thanks, >> > Parth >> > >> > >> > >> > >> > >> > >> > >> > On Tue, Aug 30, 2011 at 7:31 PM, Pavan Savoy <pavan.sa...@gmail.com> >> > wrote: >> > > On Tue, Aug 30, 2011 at 9:26 PM, parth shah <parthmshah2...@gmail.com> >> > > wrote: >> > > > Hello Friends, >> > >> > > > I'm using WL1271 WIFI/BT module. >> > >> > > > I'm getting below output while running hciattach /dev/ttymxc1 texas >> > > 30000000 >> > >> > > > [ATH_INFO] (external/bluetooth/bluez/tools/hciattach.c) <init_uart>: >> > > Serial >> > > > port is opened >> > > > [ATH_INFO] (external/bluetooth/bluez/tools/hciattach.c) <init_uart>: >> > > > Port >> > > > settings is gotten >> > > > [ATH_INFO] (external/bluetooth/bluez/tools/hciattach.c) <init_uart>: >> > > > Port >> > > > settings is set >> > > > [ATH_INFO] (external/bluetooth/bluez/tools/hciattach.c) <init_uart>: >> > > Initial >> > > > baud rate is set >> > > > [ATH_INFO] (external/bluetooth/bluez/tools/hciattach.c) <init_uart>: >> > > Break >> > > > is sent >> > > > Initialization timed out. >> > >> > > What platform is this ? >> > > Have you powered the BT chip ? These chips tend to have a >> > > BT_EN/NShutDown gpio which needs to be pulled up for it to be powered >> > > on. >> > >> > > > I have Firmware loaded at /lib/firmware/TIInit.... and BT_EN is high >> > > before >> > > > running hciattach >> > >> > > > Any idea why does it happen? Thanks in advance. >> > >> > > > Thanks, >> > > > Parth >> > >> > > > -- >> > > > unsubscribe: android-kernel+unsubscr...@googlegroups.com >> > > > website:http://groups.google.com/group/android-kernel >> > >> > > -- >> > > --Pavan Savoy >> > >> > > -- >> > > unsubscribe: android-kernel+unsubscr...@googlegroups.com >> > > website:http://groups.google.com/group/android-kernel >> >> -- >> unsubscribe: android-kernel+unsubscr...@googlegroups.com >> website: http://groups.google.com/group/android-kernel > > -- > unsubscribe: android-kernel+unsubscr...@googlegroups.com > website: http://groups.google.com/group/android-kernel -- --Pavan Savoy -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel
