-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 04/23/2013 01:43 PM, j m wrote: > thank you for your answer, but this it is if I have an external > pull-down resistor, I want the software to activate a pull-down on > the entrance, I don't have external resistor.
No. These settings activate an internal, weak pull-down that is inside the stm32f1 IC. Best regards Tomaž > 2013/4/23 Tomaž Šolc <[email protected] > <mailto:[email protected]>> > > On 04/23/2013 11:31 AM, j m wrote: >> Hello, I use libopencm3 with f1 stm32 for paparazzi autopilot >> (luftboot). I would like to force a pull-down resistor on PIN >> PA9. > >> I wanted to know how. If possible directly in libopencm3 file >> (gpio.h) for example, or in the luftboot.c file where I call >> libopencm3 ? > > You should add the following to the part of your code that > initializes GPIOs: > > gpio_set_mode(GPIOA, GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, > GPIO9); gpio_clear(GPIOA, GPIO9); > > Best regards Tomaž > > > ------------------------------------------------------------------------------ > > Try New Relic Now & We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance > monitoring service that delivers powerful full stack analytics. > Optimize and monitor your browser, app, & servers with just a few > lines of code. Try New Relic and get this awesome Nerd Life shirt! > http://p.sf.net/sfu/newrelic_d2d_apr > _______________________________________________ libopencm3-devel > mailing list [email protected] > <mailto:[email protected]> > https://lists.sourceforge.net/lists/listinfo/libopencm3-devel > > > > > ------------------------------------------------------------------------------ > > Try New Relic Now & We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance monitoring > service that delivers powerful full stack analytics. Optimize and > monitor your browser, app, & servers with just a few lines of code. > Try New Relic and get this awesome Nerd Life shirt! > http://p.sf.net/sfu/newrelic_d2d_apr > > > > _______________________________________________ libopencm3-devel > mailing list [email protected] > https://lists.sourceforge.net/lists/listinfo/libopencm3-devel - -- Tomaž Šolc, research assistant SensorLab, Jožef Stefan Institute http://sensorlab.ijs.si mail: [email protected] blog: http://www.tablix.org/~avian/blog -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQEcBAEBAgAGBQJRdnXYAAoJED848b3tOBsIQnYH/RK8I0YQZqHbcUNxo9e2Olij nSjgdLNCu0HlW8mRh8/l5+hL6WslaR1t62LVyA4PwGrElDKMRPtFXD931GCCQ7Dw ZIt1d3om3s2U5KXz3lVdZLa1GowfUKknLRMU6ipRWAumnzp6Qt8q2BhE/YOhda7G Gzl/j0WYbpg1ZuJ5uMdwvhdQiKzjq0IPzVJfBSn14SRJ0L2rI2bgaUQzWUK2R9Ds HzQYQ2TaxwkX3D1b8fnnYbXgn4pGvE83kdVADyUzp4HpY8oAZjT7X7fSkjr7c+J9 cGjrmmsSRwl0VFJIxsEErPND4yVH/3W7Inkyzb3m33g0KwWUbt+hVnGZamyI82M= =JA14 -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr _______________________________________________ libopencm3-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libopencm3-devel
