1.\"
2.\" Copyright (c) 2014 Luiz Otavio O Souza <loos@freebsd.org>
3.\" All rights reserved.
4.\"
5.\" Redistribution and use in source and binary forms, with or without
6.\" modification, are permitted provided that the following conditions
7.\" are met:
8.\" 1. Redistributions of source code must retain the above copyright
--- 8 unchanged lines hidden (view full) ---
17.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24.\"
25.\" $FreeBSD: stable/10/share/man/man4/man4.arm/ti_adc.4 270238 2014-08-20 18:10:12Z loos $
26.\"
27.Dd June 1, 2014
28.Dt TI_ADC 4
29.Os
30.Sh NAME
31.Nm ti_adc
32.Nd TI AM3XXX analog to digital converter driver
33.Sh SYNOPSIS
34.Cd "device ti_adc"
35.Sh DESCRIPTION
--- 37 unchanged lines hidden (view full) ---
73dev.ti_adc.0.ain.5.enable: 0
74dev.ti_adc.0.ain.5.open_delay: 0
75dev.ti_adc.0.ain.5.samples_avg: 0
76dev.ti_adc.0.ain.5.input: 0
77dev.ti_adc.0.ain.6.enable: 1
78dev.ti_adc.0.ain.6.open_delay: 0
79dev.ti_adc.0.ain.6.samples_avg: 4
80dev.ti_adc.0.ain.6.input: 2308
81dev.ti_adc.0.ain.7.enable: 1
82dev.ti_adc.0.ain.7.open_delay: 0
83dev.ti_adc.0.ain.7.samples_avg: 0
84dev.ti_adc.0.ain.7.input: 3812
85.Ed
86.Pp
87On Beaglebone-black the analog input 7 is connected to the 3V3B rail through
88a voltage divisor (2:1).
89The 3V3B voltage rail comes from the TL5209 LDO regulator which is limited
90to 500mA maximum.
91.Pp
92Global settings:
93.Bl -tag -width ".Va dev.ti_adc.0.clockdiv"
94.It Va dev.ti_adc.0.clockdiv
95Sets the ADC clock prescaler.
96The minimum value is 10 and the maximum is 65535.
97The ADC clock is based on CLK_M_OSC (24Mhz) / clockdiv.
98This gives a maximum of ~2.4Mhz for the ADC clock and ~10Khz for the default
99setting (clockdiv = 2400).
--- 16 unchanged lines hidden (view full) ---
116It is made of a 12 bit value (0 ~ 4095).
117.El
118.Sh SEE ALSO
119.Xr sysctl 8
120.Sh HISTORY
121The
122.Nm
123driver first appeared in
124.Fx 10.1 .
125.Sh AUTHORS
126.An -nosplit
127The driver and this manual page was written by
128.An Luiz Otavio O Souza Aq loos@FreeBSD.org .
2.\" Copyright (c) 2014 Luiz Otavio O Souza <loos@freebsd.org>
3.\" All rights reserved.
4.\"
5.\" Redistribution and use in source and binary forms, with or without
6.\" modification, are permitted provided that the following conditions
7.\" are met:
8.\" 1. Redistributions of source code must retain the above copyright
--- 8 unchanged lines hidden (view full) ---
17.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24.\"
25.\" $FreeBSD: stable/10/share/man/man4/man4.arm/ti_adc.4 270238 2014-08-20 18:10:12Z loos $
26.\"
27.Dd June 1, 2014
28.Dt TI_ADC 4
29.Os
30.Sh NAME
31.Nm ti_adc
32.Nd TI AM3XXX analog to digital converter driver
33.Sh SYNOPSIS
34.Cd "device ti_adc"
35.Sh DESCRIPTION
--- 37 unchanged lines hidden (view full) ---
73dev.ti_adc.0.ain.5.enable: 0
74dev.ti_adc.0.ain.5.open_delay: 0
75dev.ti_adc.0.ain.5.samples_avg: 0
76dev.ti_adc.0.ain.5.input: 0
77dev.ti_adc.0.ain.6.enable: 1
78dev.ti_adc.0.ain.6.open_delay: 0
79dev.ti_adc.0.ain.6.samples_avg: 4
80dev.ti_adc.0.ain.6.input: 2308
81dev.ti_adc.0.ain.7.enable: 1
82dev.ti_adc.0.ain.7.open_delay: 0
83dev.ti_adc.0.ain.7.samples_avg: 0
84dev.ti_adc.0.ain.7.input: 3812
85.Ed
86.Pp
87On Beaglebone-black the analog input 7 is connected to the 3V3B rail through
88a voltage divisor (2:1).
89The 3V3B voltage rail comes from the TL5209 LDO regulator which is limited
90to 500mA maximum.
91.Pp
92Global settings:
93.Bl -tag -width ".Va dev.ti_adc.0.clockdiv"
94.It Va dev.ti_adc.0.clockdiv
95Sets the ADC clock prescaler.
96The minimum value is 10 and the maximum is 65535.
97The ADC clock is based on CLK_M_OSC (24Mhz) / clockdiv.
98This gives a maximum of ~2.4Mhz for the ADC clock and ~10Khz for the default
99setting (clockdiv = 2400).
--- 16 unchanged lines hidden (view full) ---
116It is made of a 12 bit value (0 ~ 4095).
117.El
118.Sh SEE ALSO
119.Xr sysctl 8
120.Sh HISTORY
121The
122.Nm
123driver first appeared in
124.Fx 10.1 .
125.Sh AUTHORS
126.An -nosplit
127The driver and this manual page was written by
128.An Luiz Otavio O Souza Aq loos@FreeBSD.org .