Genio 350-EVK
I2C
There are 4 I2C adapters on Genio 350-EVK:
I2C-0 shared with Battery Charger
I2C-1 shared with HDMI Bridge IC it66121, Capacitive Touch Controller
I2C-2 shared with MIPI-CSI camera 0
I2C-3 shared with MIPI-CSI camera 1
I2C-0 and I2C-2 are exported to Raspberry Pi HAT. You can use them to connect to other I2C devices.
SPI
There is 1 master SPI device on Genio 350-EVK:
SPI on Raspberry Pi HAT Pin #19(MOSI) #21(MISO) #23(SCLK) #24(CS)
USB
There are 4 USB ports on Genio 350-EVK:
USB 2.0 Micro B OTG
USB 2.0 Type-A Host
USB to UART Bridge IC * 2 (Debug port)
USB 2.0 Micro B OTG is used to flash the image. For flashing the image, please refer to flash.
USB 2.0 Type-A Host can be used 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/
USB to UART Bridge IC is used for the debug console.
PWM
There are 4 PWM devices on Genio 350-EVK:
PWM_A on Raspberry Pi HAT Pin #32
PWM_B on Jumper J2307
PWM_C on Raspberry Pi HAT Pin #33
DISP_PWM on Raspberry Pi HAT Pin #32
Note
By default, PWM_B and DISP_PWM are inactive. You have to set pinmux to enable them.
You can use sysfs to operate PWM devices.
First, you need to export the PWM node.
echo 0 > /sys/class/pwm/pwmchip0/export
Second, you need to set the period and the duty cycle.
echo 2000000 > /sys/class/pwm/pwmchip0/pwm0/period
echo 1000000 > /sys/class/pwm/pwmchip0/pwm0/duty_cycle
Finally, you can enable the PWM device.
echo 1 > /sys/class/pwm/pwmchip0/pwm0/enable
You can also use the kernel debugger to check the value of PMW devices.
cat /sys/kernel/debug/pwm
platform/1100e000.disp-pwm, 1 PWM device
pwm-0 (sysfs ): requested period: 0 ns duty: 0 ns polarity: normal
platform/11006000.pwm, 3 PWM devices
pwm-0 (sysfs ): requested enabled period: 2000000 ns duty: 1000000 ns polarity: normal
pwm-1 (sysfs ): requested period: 0 ns duty: 0 ns polarity: normal
pwm-2 (sysfs ): requested period: 0 ns duty: 0 ns polarity: normal
UART
There are 3 UART devices on Genio 350-EVK. The supported baud is from 4,800 bps to 921,600 bps:
UART to USB * 2
UART on Raspberry Pi HAT Pin #8(Tx) #10(Rx)
GPIO
The SOC has 145 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 350-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 |
Alternative |
Pin # |
Main |
Alternative |
|---|---|---|---|---|---|
1 |
VDD_3V3 |
2 |
VDD_5V |
||
3 |
I2C2_SDA |
Camera 0 I2C |
4 |
VDD_5V |
|
5 |
I2C2_SCL |
Camera 0 I2C |
6 |
GND |
|
7 |
GPIO124 |
8 |
UART2_TXD |
GPIO40 |
|
9 |
GND |
10 |
UART2_RXD |
GPIO39 |
|
11 |
GPIO127 |
12 |
GPIO22 |
||
13 |
GPIO33 |
14 |
GND |
||
15 |
GPIO109 |
16 |
GPIO136 |
||
17 |
VDD_3V3 |
18 |
GPIO137 |
||
19 |
SPI_MOSI |
GPIO29 |
20 |
GND |
|
21 |
SPI_MISO |
GPIO28 |
22 |
GPIO140 |
|
23 |
SPI_SCLK |
GPIO27 |
24 |
SPI_CS |
GPIO26 |
25 |
GND |
26 |
GPIO141 |
||
27 |
I2C0_SDA |
GPIO57 |
28 |
I2C0_SCL |
GPIO58 |
29 |
GPIO25 |
30 |
GND |
||
31 |
GPIO142 |
32 |
PWMA |
GPIO19 |
|
33 |
PWMC |
IRRX |
34 |
GND |
|
35 |
GPIO144 |
36 |
GPIO139 |
||
37 |
GPIO138 |
38 |
GPIO34 |
||
39 |
GND |
40 |
GPIO32 |
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 350-EVK and external devices.
Some pins have alternative usage:
I2C2_SDA / I2C2_SCL are also used for camera 0.
UART2_TXD / UART2_RXD can be switched to GPIO by setting pinmux.
SPI_MOSI / SPI_MISO / SPI_SCLK / SPI_CS can be switched to GPIO by setting pinmux.
I2C0_SDA / I2C0_SCL can be switched to GPIO by setting pinmux.
PWMA can be switched to GPIO19 and DISP_PWM by setting pinmux.
PWMC can be switched to IRRX by setting jumper J1303.
Hardware Pin Mux
There are some GPIOs shared with on-board WiFi chip (MT6631), JTAG, IrDA Receiver, and Raspberry Pi-like I/O. You should pay attention to them when you use these functions.
J2318 |
Short |
Open |
|---|---|---|
GPIO |
MT6631 / JTAG |
Raspberry Pi I/O |
GPIO32 |
JTDI |
RasPi_GPIO32 |
GPIO33 |
JTDO |
RasPi_GPIO33 |
GPIO34 |
JTRST |
RasPi_GPIO34 |
GPIO136 |
CONN_TOP_CLK |
RasPi_GPIO136 |
GPIO137 |
CONN_TOP_DATA |
RasPi_GPIO137 |
GPIO138 |
CONN_HRST_B |
RasPi_GPIO138 |
GPIO140 |
CONN_BT_CLK |
RasPi_GPIO140 |
GPIO141 |
CONN_BT_DATA |
RasPi_GPIO141 |
GPIO142 |
CONN_WF_CTRL0 |
RasPi_GPIO142 |
GPIO143 |
CONN_WF_CTRL1 |
RasPi_GPIO143 |
GPIO144 |
CONN_WF_CTRL2 |
RasPi_GPIO144 |
GPIO139 |
CONN_WB_PTA |
RasPi_GPIO139 |
Location |
Use Pin 2 and Pin 3 |
Short Pin 1 and Pin 2 |
|---|---|---|
J1303 |
IRRX_3V3 |
RasPi_PWM_3V3 |