Genio 1200-EVK
I2C
There are 4 I2C adapters on Genio 1200-EVK:
I2C-0 shared with CSI0 and CSI1
I2C-1 shared with CSI2-1, MT6691, USB5734 and gt9271
I2C-2 shared with CSI2-2 and T5205FN
I2C-6 shared with PMIC and DRAM buck
I2C-0 and I2C-2 are exported to Raspberry Pi HAT. You can use it to connect to other I2C devices.
SPI
There are 2 master SPI devices on Genio 1200-EVK:
SPI-1 shared with CAN bus MCP2518
SPI-2 on J38 Pin #2(CLK) #3(CSB) #4(MOSI) #5(MISO)
These 2 SPI are also exported to Raspberry Pi HAT. You can use it to connect to other SPI devices.
CAN
We utilize Microchip’s MCP2518FD to provide the CAN interface. The MCP2518FD is a CAN FD Controller that is compatible with an SPI interface. It supports both CAN frames in the Classical format (CAN 2.0B) and the CAN Flexible Data Rate (CAN FD) format as specified in ISO11898-1:2015. For more detailed information about the MCP2518FD, please refer to MCP2518FD.
The MCP2518FD uses the SPI-1 interface, and you can verify whether the CAN node has been successfully loaded using the ifconfig command.
ifconfig
can0: flags=193<UP,RUNNING,NOARP> mtu 72
Additionally, the MCP2518FD is set to the CAN FD mode with bitrate 500000 and dbitrate 4000000 by default.
You can modify the default settings by modifying the udev rules. The file path is
meta-rity/meta/recipes-core/base-files/files/genio-1200-evk/91-caninterface.rules.
KERNELS=="spi0.0", SUBSYSTEMS=="spi", DRIVERS=="mcp251xfd", RUN+="/sbin/ip link set can0 up type can bitrate 500000 dbitrate 4000000 fd on"
The rity-demo-image itself includes the can-utils tool, which can be used to test basic CAN communication.
You can use this tool to verify if the two CAN devices can communicate properly.
Choose one device as the receiver and the other as the transmitter.
# Receiver console
candump can0
# Transmitter console
cansend can0 123#11223344
# Receiver console should now show:
can0 123 [4] 11 22 33 44
Note
Please take note that the level of CAN bus integration currently stands at the proof-of-concept (POC) stage. Our testing has been limited to basic CAN communication using the provided command, and we cannot ensure complete functionality in every possible scenario.
USB
There are 5 USB ports on Genio 1200-EVK:
USB Type-C x 1, connected to
USB0port of Genio 1200 SoC.USB Type-A x 2, connected to
USB1port of Genio 1200 SoC.USB micro-B x 1, connected to
USB2port of Genio 1200 SoC.USB to UART Bridge IC (Debug port) x 1, connected to
UART0port of Genio 1200.
The USB to UART Bridge IC is used for the UART0 debug console.
The USB Type-A ports are connected to an on board USB hub that only supports USB 3.1 gen 1. The USB Type-C port supports USB 3.1 gen 1.
The USB Type-C, USB micro-B, and both USB Type-A ports can be used as USB host ports for USB flash drives, UVC, UAC, and so on. To mount a USB flash drive, you can use:
mkdir /media/usb
lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 1 29.5G 0 disk
|-sda1 8:1 1 200M 0 part
`-sda2 8:2 1 29.3G 0 part
mount /dev/sda2 /media/usb/
The USB Type-C and USB micro-B ports also support USB OTG.
The USB Type-C port is also used to flash images to the eMMC or UFS storage. For flashing the image, please refer to flash.
Note
The USB3 port of Genio 1200 SoC is provided as part of the M.2 slot for the MT7921 wireless module. It is not exposed as a USB port on
the Genio 1200-EVK.
USB Mass Storage
The device mode of Genio 1200-EVK USB micro-B port (USB2) is set to
support USB Mass Storage function, this function is set in the following gadget script:
src/meta-rity/meta/recipes-core/base-files/files/genio-1200-evk/usbmass.sh
src/meta-rity/meta/recipes-core/base-files/files/genio-1200-evk/usbmass.service
If you want to know more about how to use the gadget from user space, please refer to the Mass Storage Gadget (MSG).
PWM
There are 4 general PWM devices on Genio 1200-EVK, but only one PWM pin are exported out:
PWM_3 on Raspberry Pi HAT Pin #33
Note
PWM_3 pin is mux by a jumper J43. Kepp J43 opened to select PWM function. Please refer to Hardware Pin Mux.
You can use sysfs to operate PWM devices.
First, you need to export the PWM node.
echo 3 > /sys/class/pwm/pwmchip0/export
Second, you need to set the period and the duty cycle.
echo 2000000 > /sys/class/pwm/pwmchip0/pwm3/period
echo 1000000 > /sys/class/pwm/pwmchip0/pwm3/duty_cycle
Finally, you can enable the PWM device.
echo 1 > /sys/class/pwm/pwmchip0/pwm3/enable
You can also use the kernel debugfs to check the value of PMW devices.
cat /sys/kernel/debug/pwm
platform/1100e000.disp-pwm, 1 PWM device
pwm-0 ((null) ): period: 0 ns duty: 0 ns polarity: normal
platform/10048000.pwm, 4 PWM devices
pwm-0 ((null) ): period: 0 ns duty: 0 ns polarity: normal
pwm-1 ((null) ): period: 0 ns duty: 0 ns polarity: normal
pwm-2 ((null) ): period: 0 ns duty: 0 ns polarity: normal
pwm-3 (sysfs ): requested enabled period: 2000000 ns duty: 1000000 ns polarity: normal
UART
There are 2 UART devices on Genio 1200-EVK. The supported baud is from 300 bps to 3000000 bps:
UART0: Connect to USB bridge(FT232RL), MicroUSB UART0 connector
UART1: Shared with USB bridge(FT232RL) and Raspberry Pi HAT
J43 short: USB bridge(FT232RL), MicroUSB UART1 connector
J43 open: Raspberry Pi HAT Pin #8(Tx) #10(Rx)
Note
UART0 is used for AP debug console
GPIO
The SOC has 144 GPIO pins in total. Due to the limitation of the number of physical pins, only few GPIO pins are exported. The actual positions of available GPIO pins are shown in Raspberry Pi HAT.
Raspberry Pi HAT
There is a 40-pin Raspberry Pi HAT on Genio 1200-EVK. It contains several peripheral interfaces. By default, it follows the official Raspberry Pi setting. For more details about RPi HAT, please refer to GPIO and the 40-pin Header. You can use the header to connect your external devices.
Pin # |
Main |
Pin # |
Main |
|---|---|---|---|
1 |
VDD_3V3 |
2 |
VDD_5V |
3 |
I2C0_SDA |
4 |
VDD_5V |
5 |
I2C0_SCL |
6 |
GND |
7 |
GPIO4 |
8 |
UART1_TXD |
9 |
GND |
10 |
UART1_RXD |
11 |
GPIO3 |
12 |
GPIO5 |
13 |
GPIO135 |
14 |
GND |
15 |
GPIO2 |
16 |
GPIO1 |
17 |
VDD_3V3 |
18 |
GPIO0 |
19 |
SPI2_MOSI |
20 |
GND |
21 |
SPI2_MISO |
22 |
GPIO57 |
23 |
SPI2_SCLK |
24 |
SPI2_CS |
25 |
GND |
26 |
GPIO134 |
27 |
I2C2_SDA |
28 |
I2C2_SCL |
29 |
GPIO66 |
30 |
GND |
31 |
GPIO68 |
32 |
GPIO65 |
33 |
PWM3 |
34 |
GND |
35 |
SPI1_MISO |
36 |
SPI1_CS |
37 |
GPIO67 |
38 |
SPI1_MOSI |
39 |
GND |
40 |
SPI1_SCLK |
Note
VDD_5V power can provide 5V/2A maximum but share with USB Host VBUS 5V output.
VGPIOEXT_3V3 power can deliver 3.3V/300mA
Black words are ground pins.
Red words are power pins.
Green words are special function pins.
Blue words are GPIOs.
Pink words are pins, which multiplex with other functions. Please refer to Hardware Pin Mux.
Warning
The default input/output voltage of the GPIO pins on the header is 3.3V. Before using them, please make sure the voltage is suitable for your external device. Otherwise, the unmatched voltage may destroy both Genio 1200-EVK and external devices.
Hardware Pin Mux
There are some pins shared with Raspberry Pi HAT and other functions. You should pay attention to them when you use these functions.
GPIO ID # |
Pin Name |
Short |
Open |
|---|---|---|---|
GPIO_00 |
GPIO_00 |
MSDC2_CMD_CONN |
Raspberry Pi HAT Pin #18(GPIO0) |
GPIO_01 |
GPIO_01 |
MSDC2_CLK_CONN |
Raspberry Pi HAT Pin #16(GPIO1) |
GPIO_02 |
GPIO_02 |
MSDC2_DAT3_CONN |
Raspberry Pi HAT Pin #15(GPIO2) |
GPIO_03 |
GPIO_03 |
MSDC2_DAT0_CONN |
Raspberry Pi HAT Pin #11(GPIO3) |
GPIO_04 |
GPIO_04 |
MSDC2_DAT2_CONN |
Raspberry Pi HAT Pin #7(GPIO4) |
GPIO_05 |
GPIO_05 |
MSDC2_DAT1_CONN |
Raspberry Pi HAT Pin #12(GPIO5) |
GPIO_57 |
I2SO2_MCK |
DSI1_LCM_RST_CONN |
Raspberry Pi HAT Pin #22(GPIO57) |
GPIO_65 |
PCM_DO |
MT7663_I2S_DO |
Raspberry Pi HAT Pin #32(GPIO65) |
GPIO_66 |
PCM_CLK |
MT7663_I2S_BCK |
Raspberry Pi HAT Pin #29(GPIO66) |
GPIO_67 |
PCM_DI |
MT7663_I2S_DI |
Raspberry Pi HAT Pin #37(GPIO67) |
GPIO_68 |
PCM_SYNC |
MT7663_I2S_LRCK |
Raspberry Pi HAT Pin #31(GPIO68) |
GPIO_107 |
KPCOL1 |
DSI1_DSI_TE_CONN |
Raspberry Pi HAT Pin #33(PWM3) |
GPIO_102 |
UART1_TXD |
FT232RL RXD |
Raspberry Pi HAT Pin #8(UART1_TXD) |
GPIO_103 |
UART1_RXD |
FT232RL TXD |
Raspberry Pi HAT Pin #10(UART1_RXD) |