Difference between revisions of "Beagleboard:BeagleBone cape interface spec"
Lorforlinux (talk | contribs) (→SPI) |
(→I2C: Keep directory structure.) |
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| Line 2: | Line 2: | ||
= I2C = | = I2C = | ||
| − | === /dev/bone | + | === /dev/bone/i2c/0 === |
AM3358 I2C0<br> | AM3358 I2C0<br> | ||
AM5729 I2C1 | AM5729 I2C1 | ||
* On-board peripherals | * On-board peripherals | ||
| − | === /dev/bone | + | === /dev/bone/i2c/1 === |
AM3358 I2C1<br> | AM3358 I2C1<br> | ||
AM5729 I2C5 | AM5729 I2C5 | ||
| Line 13: | Line 13: | ||
* P9.18 - SDA | * P9.18 - SDA | ||
| − | === /dev/bone | + | === /dev/bone/i2c/2 === |
AM3358 I2C2<br> | AM3358 I2C2<br> | ||
AM5729 I2C4 | AM5729 I2C4 | ||
| Line 19: | Line 19: | ||
* P9.20 - SDA | * P9.20 - SDA | ||
| − | === /dev/bone | + | === /dev/bone/i2c/3 === |
AM3358 N/A<br> | AM3358 N/A<br> | ||
AM5729 I2C3 | AM5729 I2C3 | ||
Revision as of 09:24, 31 March 2020
This is a list of symlink interfaces based on BeagleBone Cape header pins.
I2C
/dev/bone/i2c/0
AM3358 I2C0
AM5729 I2C1
- On-board peripherals
/dev/bone/i2c/1
AM3358 I2C1
AM5729 I2C5
- P9.17 - SCL
- P9.18 - SDA
/dev/bone/i2c/2
AM3358 I2C2
AM5729 I2C4
- P9.19 - SCL
- P9.20 - SDA
/dev/bone/i2c/3
AM3358 N/A
AM5729 I2C3
- P9.24 - SCL
- P9.26 - SDA
SPI
/dev/spi/0.x
AM3358 SPI0
AM5729 SPI2
- P9.18 - MOSI
- P9.21 - MISO
- P9.22 - CLK
/dev/spi/0.0
AM3358 SPI0 CS0
AM5729 SPI2 CS0
- P9.17 - CS
/dev/spi/1.x
AM3358 SPI1
AM5729 SPI3
- P9.30 - MOSI
- P9.29 - MISO
- P9.31 - CLK
/dev/spi/1.0
AM3358 SPI1 CS0
AM5729 SPI3 CS0
- P9.28 - CS
/dev/spi/1.1
AM3358 SPI1 CS1
AM5729 SPI3 CS1
- P9.42 - CS
/dev/spi/1.2
AM3358 SPI1 GPIO1_17
AM5729 SPI3 GPIO7_11
- P9.23 - CS
UART
/dev/bone-uart0
AM3358 UART0
AM5729 UART1
- console debug header pins
/dev/bone-uart1
AM3358 UART1
AM5729 UART10
- P9.24 - TX
- P9.26 - RX
/dev/bone-uart2
AM3358 UART2
AM5729 UART3
- P9.21 - TX
- P9.22 - RX
/dev/bone-uart3
AM3358 UART3
AM5729 N/A
- P9.42 - TX
/dev/bone-uart4
AM3358 UART4
AM5729 UART5
- P9.13 - TX
- P9.11 - RX
/dev/bone-uart5
AM3358 UART5
AM5729 UART8
- P8.37 - TX
- P8.38 - RX
CAN
/dev/bone-can0
AM3358 CAN0
AM5729 N/A
- P9.19 - RX
- P9.20 - TX
/dev/bone-can1
AM3358 CAN1
AM5729 CAN2
- P9.24 - RX
- P9.26 - TX
ADC
/dev/bone-adc0
- AIN0 - AM3358 in_voltage0_raw, AM5729 in_voltage0_raw
- AIN1 - AM3358 in_voltage1_raw, AM5729 in_voltage1_raw
- AIN2 - AM3358 in_voltage2_raw, AM5729 in_voltage3_raw
- AIN3 - AM3358 in_voltage3_raw, AM5729 in_voltage2_raw
- AIN4 - AM3358 in_voltage4_raw, AM5729 in_voltage7_raw
- AIN5 - AM3358 in_voltage5_raw, AM5729 in_voltage6_raw
- AIN6 - AM3358 in_voltage6_raw, AM5729 in_voltage4_raw
PWM/TIMER
/dev/bone-timer0
AM3358 TIMER4
AM5729 TIMER11
- P8.7
/dev/bone-timer1
AM3358 TIMER5
AM5729 TIMER14
- P8.9
/dev/bone-timer2
AM3358 TIMER6
AM5729 TIMER10
- P8.10
/dev/bone-timer3
AM3358 TIMER7
AM5729 TIMER12
- P8.8
MMC
/dev/bone-mmc2
AM3358 MMC2
AM5729 MMC3
- P8.21 - CLK
- P8.20 - CMD
- P8.25 - DAT0
- P8.24 - DAT1
- P8.5 - DAT2
- P8.6 - DAT3
- P8.23 - DAT4
- P8.22 - DAT5
- P8.4 - DAT7
- P8.3 - DAT6
LCD
eQEP
/dev/bone-eqep0
AM3358 eQEP0
AM5729 eQEP3
- P9.42 - A
- P9.27 - B
- P9.25 - STROBE (AM3358-only)
/dev/bone-eqep1
AM3358 eQEP1
AM5729 eQEP1
- P8.34 - A
- P8.36 - B
/dev/bone-eqep2
AM3358 eQEP2
AM5729 eQEP2
- P8.12 - A
- P8.11 - B
McASP
Methodology
udev rules
10-of-symlink.rules
#From: https://github.com/mvduin/py-uio/blob/master/etc/udev/rules.d/10-of-symlink.rules
# allow declaring a symlink for a device in DT
ATTR{device/of_node/symlink}!="", \
ENV{OF_SYMLINK}="%s{device/of_node/symlink}"
ENV{OF_SYMLINK}!="", ENV{DEVNAME}!="", \
SYMLINK+="%E{OF_SYMLINK}", \
TAG+="systemd", ENV{SYSTEMD_ALIAS}+="/dev/%E{OF_SYMLINK}"
TBD
#Also courtesy of mvduin
# create symlinks for gpios exported to sysfs by DT
SUBSYSTEM=="gpio", ACTION=="add", TEST=="value", ATTR{label}!="sysfs", \
RUN+="/bin/mkdir -p /dev/gpio", \
RUN+="/bin/ln -sT '/sys/class/gpio/%k' /dev/gpio/%s{label}"
