View source for AOM-3841 SPI CN1&SPI)CN2&CN2 I2C——I2C/SPI


== '''I2C Pin Header''' ==

'''AOM-3841 has two I2C-PIN-Header channels.'''

=== '''CN2_I2C''' ===

{| border="1" cellpadding="1" cellspacing="1" style="width: 409px;"
|-
| colspan="4" style="width: 399px;" | '''CN2 CN2 Connector Pin Definition'''
|-
| style="width: 60px;" | '''Pin'''
| style="width: 85px;" | '''Signal'''
| style="width: 38px;" | '''I/O'''
| style="width: 203px;" | '''Description'''
|-
| style="width: 60px;" | 1
| style="width: 85px;" | GND
| style="width: 38px;" | &nbsp;
| style="width: 203px;" | Ground
|-
| style="width: 60px;" | 2
| style="width: 85px;" | I2C0_DATA
| style="width: 38px;" | I/O
| style="width: 203px;" | I2C0 Data
|-
| style="width: 60px;" | 3
| style="width: 85px;" | I2C0_CLK
| style="width: 38px;" | I
| style="width: 203px;" | I2C0 clock input from host.
|-
| style="width: 60px;" | 4
| style="width: 85px;" | +V1.8
| style="width: 38px;" | &nbsp;
| style="width: 203px;" | 1.8V Source
|}

=== '''CN4_I2C''' ===

{| border="1" cellpadding="1" cellspacing="1" style="width: 409px;"
|-
| colspan="4" style="width: 399px;" | '''CN4 CN4 Connector Pin Definition'''
|-
| style="width: 61px;" | '''Pin'''
| style="width: 92px;" | '''Signal'''
| style="width: 36px;" | '''I/O'''
| style="width: 197px;" | '''Description'''
|-
| style="width: 61px;" | 1
| style="width: 92px;" | GND
| style="width: 36px;" | &nbsp;
| style="width: 197px;" | Ground
|-
| style="width: 61px;" | 2
| style="width: 92px;" | I2C1_DATA
| style="width: 36px;" | I/O
| style="width: 197px;" | I2C1 Data
|-
| style="width: 61px;" | 3
| style="width: 92px;" | I2C1_CLK
| style="width: 36px;" | I
| style="width: 197px;" | I2C0 clock input from host.
|-
| style="width: 61px;" | 4
| style="width: 92px;" | +V1.8
| style="width: 36px;" | &nbsp;
| style="width: 197px;" | 1.8V Source
|}

=== '''Number''' ===

{| border="1" cellpadding="1" cellspacing="1"
|-
| colspan="4" | '''I2C-PIN-Header'''
|-
| '''I2C Number'''
| '''Bus Number'''
| '''I2C Address'''
| '''AOM-DB3500 Number'''
|-
| I2C0
| 0
| 0x53
| CN2
|-
| I2C1
| 7
| 0x57
| CN4
|}
<pre># 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
</pre>

[[File:AOM-3841 I2C function.png|RTENOTITLE]]
<pre># i2cdetect -y 7
# i2ctransfer -y 7 w4@0x57 0x1f 0xf0 0x22 0x33
# i2ctransfer -y 7 w2@0x57 0x1f 0xf0 r2
0x22 0x33</pre>

[[File:AOM-3841 I2C function1.png|RTENOTITLE]]

== '''SPI PIN Header''' ==

AOM-3841 has two SPI-PIN-Header channels. SPIs on AOM-DB3500 have multifunctions, change to SPI PIN Header.

=== '''SPI_CN1''' ===

{| border="1" cellpadding="1" cellspacing="1"
|-
| colspan="4" | '''SPI_CN1 Connector Pin Definition'''
|-
| '''Pin'''
| '''Signal'''
| '''I/O'''
| '''Description'''
|-
| 1
| +V1.8
| &nbsp;
| Power Supply
|-
| 2
| GND
| &nbsp;
| 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
| &nbsp;
| Not Applicable
|-
| 8
| SPI1_CS1#
| I
| SPI Chip Select Input
|}

=== '''SPI_CN2''' ===

{| border="1" cellpadding="1" cellspacing="1"
|-
| colspan="4" | '''SPI_CN2 Connector Pin Definition'''
|-
| '''Pin'''
| '''Signal'''
| '''I/O'''
| '''Description'''
|-
| 1
| +V1.8
| &nbsp;
| Power Supply
|-
| 2
| GND
| &nbsp;
| 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
| &nbsp;
| Not Applicable
|-
| 8
| SPI0_CS1#
| I
| SPI Chip Select Input
|}

&nbsp;

=== '''Jumper Setting：''' ===

{| border="1" cellpadding="1" cellspacing="1" style="width: 472px;"
|-
| colspan="2" style="width: 462px;" | '''SPI Select'''
|-
| style="width: 102px;" | Pin
| style="width: 354px;" | Function
|-
| style="width: 102px;" | J6（1-2）
| style="width: 354px;" | Switch SPI0 to the SPI1 flash on the baseboard.
|-
| style="width: 102px;" | J6（2-3）
| style="width: 354px;" | SPI0 is switched to the baseboard SPI_CN2
|-
| style="width: 102px;" | J5（1-2）
| style="width: 354px;" | Switch from SPI1 to SPI2 flash
|-
| style="width: 102px;" | J5（2-3）
| style="width: 354px;" | SPI1 is switched to SPI_CN1
|}

=== '''<span style="font-size: 13px;">Using EG70 Test Board to read SPI flash.</span>''' ===

Test one SPI port alternatively:
<pre># cat /proc/mtd | grep –c mtd01</pre>

Test two SPI ports at the same time:
<pre># cat /proc/mtd | grep -c mtd11
</pre>

=== '''RK Tool&nbsp; Test：''' ===
<pre># /tools/test/adv/spi/spi_test.sh 0
# /tools/test/adv/spi/spi_test.sh 1</pre>

[[File:AOM-3841 SPI function1.png|RTENOTITLE]]