AOM-DB3500 SPI CN1&SPI SN2&CN2 I2C——I2C/SPI
Contents
- 1I2C Pin Header 1.1CN2_I2C 1.2CN4_I2C
- 2SPI PIN Header 2.1SPI_CN1 2.2J5 2.3SPI_CN2 2.4J6
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 |
| I2C0 |
| I2C1 |
CN2_I2C
| CN2 CN2 Connector Pin Definition |
|---|
| Pin |
| 1 |
| 2 |
| 3 |
| 4 |
# 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 |
| 1 |
| 2 |
| 3 |
| 4 |
# 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 |
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
J5
| J5 SPI1_CS0# or SPI1_CS1# Select |
|---|
| Pin |
| 1-2 |
| 2-3 |
SPI_CN2
| SPI_CN2 Connector Pin Definition |
|---|
| Pin |
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
J6
| J6 SPI0_CS0# or SPI0_CS1# Select |
|---|
| Pin |
| 1-2 |
| 2-3 |
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
