Updating gpio manual page

[wiringPi.git] / gpio / gpio.1

diff --git a/gpio/gpio.1 b/gpio/gpio.1
index 73e43c81bdc1d193eff7c4fadc4b402ba7347069..ba0183f63c61a04fccd180f8894719ef2655c797 100644 (file)
--- a/gpio/gpio.1
+++ b/gpio/gpio.1
@@ -36,14 +36,23 @@ range
 .PP
 .B gpio
 .B load \ i2c/spi
+.PP
+.B gpio
+.B gbr
+channel
+.PP
+.B gpio
+.B gbw
+channel value
 
 .SH DESCRIPTION
 
 .B GPIO
-is a command line tool to allow the user easy access to the GPIO pins
-on the Raspberry Pi. It's designed for simple testing and diagnostic
-purposes, but can be used in shell scripts for general if somewhat slow
-control of the GPIO pins.
+is a swiss army knife of a command line tool to allow the user easy
+access to the GPIO pins on the Raspberry Pi and the SPI A/D and D/A
+converters on the Gertboard. It's designed for simple testing and
+diagnostic purposes, but can be used in shell scripts for general if
+somewhat slow control of the GPIO pins.
 
 Additionally, it can be used to set the exports in the \fI/sys/class/gpio\fR
 system directory to allow subsequent programs to use the \fR/sys/class/gpio\fR
@@ -113,7 +122,7 @@ the direction to input and set the edge interrupt method to \fInone\fR,
 above and note that \fBBCM_GPIO\fR pin number is used not not wiringPi pin
 numbering.
 
-Like the export commands abovem ownership is set to that of the 
+Like the export commands above, ownership is set to that of the 
 calling user, allowing subsequent access from user programs without
 requiring root/sudo.
 
@@ -142,31 +151,50 @@ Change the PWM range register. The default is 1024.
 This loads the i2c or the spi drivers into the system and changes the permissions on
 the associated /dev/ entries so that the current user has access to them.
 
+.TP
+.B gbr
+channel
+
+This reads the analog to digital converter on the Gertboard on the given
+channel. The board jumpers need to be in-place to do this operation.
+
+.TP
+.B gbw
+channel value
+
+This writes the supplied value to the output channel on the Gertboards
+SPI digital to analogue converter.
+The board jumpers need to be in-place to do this operation.
+
 
 .SH "WiringPi vs. GPIO Pin numbering"
 
 .PP
 .TS
-r r l.
-WiringPi       GPIO    Function
+r r r l.
+WiringPi       GPIO-r1 GPIO-r2 Function
 _
-0      17
-1      18      (PWM)
-2      21
-3      22
-4      23
-5      24
-6      25
-7      4
-8      0       SDA0
-9      1       SCL0
-10     8       SPI CE0
-11     7       SPI CE1
-12     10      SPI MOSI
-13     9       SPI MISO
-14     11      SPI SCLK
-15     14      TxD
-16     15      RxD
+0      17      17
+1      18      18      (PWM)
+2      21      27
+3      22      22
+4      23      23
+5      24      24
+6      25      25
+7      4       4
+8      0       2       I2C: SDA0
+9      1       3       I2C: SCL0
+10     8       8       SPI: CE0
+11     7       7       SPI: CE1
+12     10      10      SPI: MOSI
+13     9       9       SPI: MISO
+14     11      11      SPI: SCLK
+15     14      14      TxD
+16     15      16      RxD
+17     -       28
+18     -       29
+19     -       30
+20     -       31
 .TE
 
 .SH FILES