AOM-3841 SPI CN1&SPI)CN2&CN2 I2C——I2C/SPI
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Contents
I2C Pin Header
AOM-3841 has two I2C-PIN-Header channels.
CN2_I2C
| CN2 CN2 Connector Pin Definition | |||
| Pin | Signal | I/O | Description |
| 1 | GND | Ground | |
| 2 | I2C0_DATA | I/O | I2C0 Data |
| 3 | I2C0_CLK | I | I2C0 clock input from host. |
| 4 | +V1.8 | 1.8V Source | |
CN4_I2C
| CN4 CN4 Connector Pin Definition | |||
| Pin | Signal | I/O | Description |
| 1 | GND | Ground | |
| 2 | I2C1_DATA | I/O | I2C1 Data |
| 3 | I2C1_CLK | I | I2C0 clock input from host. |
| 4 | +V1.8 | 1.8V Source | |
Number
| I2C-PIN-Header | |||
| I2C Number | Bus Number | I2C Address | AOM-DB3500 Number |
| I2C0 | 0 | 0x53 | CN2 |
| I2C1 | 7 | 0x57 | CN4 |
# i2cdetect -y 0 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- 0c -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20: -- -- -- -- -- -- -- UU -- -- -- -- -- -- -- -- 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 50: -- -- -- 53 -- -- -- -- -- -- -- -- -- -- -- -- 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 70: -- 71 -- -- -- -- -- -- # i2cdetect -y 7 # i2ctransfer -y 7 w4@0x53 0x1f 0xf0 0x22 0x33 # i2ctransfer -y 7 w2@0x53 0x1f 0xf0 r2 0x22 0x33
# i2cdetect -y 7 # i2ctransfer -y 7 w4@0x57 0x1f 0xf0 0x22 0x33 # i2ctransfer -y 7 w2@0x57 0x1f 0xf0 r2 0x22 0x33
SPI PIN Header
AOM-3841 has two SPI-PIN-Header channels. SPIs on AOM-DB3500 have multifunctions, change to SPI PIN Header.
SPI_CN1
| SPI_CN1 Connector Pin Definition | |||
| Pin | Signal | I/O | Description |
| 1 | +V1.8 | Power Supply | |
| 2 | GND | Ground | |
| 3 | SPI1_CS0# | I | SPI1Chip Select Inpu |
| 4 | SPI1_CLK | I | SPI1 Serial Clock Input |
| 5 | SPI1_MISO | I | SPI1 Master Out Slave in |
| 6 | SPI1_MOSI | O | SPI1 Master In Slave Out |
| 7 | NA | Not Applicable | |
| 8 | SPI1_CS1# | I | SPI Chip Select Input |
SPI_CN2
| SPI_CN2 Connector Pin Definition | |||
| Pin | Signal | I/O | Description |
| 1 | +V1.8 | Power Supply | |
| 2 | GND | Ground | |
| 3 | SPI0_CS0# | I | SPI0Chip Select Inpu |
| 4 | SPI0_CLK | I | SPI0 Serial Clock Input |
| 5 | SPI0_MISO | I | SPI0 Master Out Slave in |
| 6 | SPI0_MOSI | O | SPI0 Master In Slave Out |
| 7 | NA | Not Applicable | |
| 8 | SPI0_CS1# | I | SPI Chip Select Input |
Jumper Setting：
| SPI Select | |
| Pin | Function |
| J6（1-2） | Switch SPI0 to the SPI1 flash on the baseboard. |
| J6（2-3） | SPI0 is switched to the baseboard SPI_CN2 |
| J5（1-2） | Switch from SPI1 to SPI2 flash |
| J5（2-3） | SPI1 is switched to SPI_CN1 |
Using EG70 Test Board to read SPI flash.
Test one SPI port alternatively:
# cat /proc/mtd | grep –c mtd01
Test two SPI ports at the same time:
# cat /proc/mtd | grep -c mtd11
RK Tool Test：
# /tools/test/adv/spi/spi_test.sh 0 # /tools/test/adv/spi/spi_test.sh 1
