AOM-DB3500 SPI CN1&SPI SN2&CN2 I2C——I2C/SPI

I2C Pin Header

AOM-3821 has two I2C-PIN-Header channels. Using EG70 Test Board to read I2C flash. Using I2C0 as an example:

I2C-PIN-Header
I2C Number	Bus Number	I2C Address	AOM-DB3500 Number
I2C0	5	0x51	CN2
I2C1	3	0x51	CN4

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

# i2cdetect -y 5
# i2ctransfer -y 5 w4@0x51 0x1f 0xf0 0x22 0x33
# i2ctransfer -y 5 w2@0x51 0x1f 0xf0 r2
0x22 0x33 

 

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

# i2cdetect -y 3
# i2ctransfer -y 3 w4@0x51 0x1f 0xf0 0x22 0x33
# i2ctransfer -y 3 w2@0x51 0x1f 0xf0 r2
0x22 0x33

SPI PIN Header

AOM-3821 has two SPI-PIN-Header channels. SPIs on AOM-DB3500 have multi-functions, 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

J5

J5 SPI1_CS0# or SPI1_CS1# Select
Pin	Function
1-2	SPI1_CS0# [Default]
2-3	SPI1_CS1#

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

J6

J6 SPI0_CS0# or SPI0_CS1# Select
Pin	Function
1-2	SPI0_CS0#[Default]
2-3	SPI0_CS1#

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