N720 OpenLinux Source Code Developer Guidewless.ru/.../Neoway_N720_OpenLinux_Source_Code...0.pdf · N720_OpenLinux_Source_Code_Developer_Guide Copyright © Neoway Technology Co.,

N720_OpenLinux_Source_Code_Developer_Guide

Copyright © Neoway Technology Co., Ltd 1

N720 OpenLinux

Source Code Developer

Guide

Version 1.0


Copyright © Neoway Technology Co., Ltd ii

Copyright

Copyright © 2017 Neoway Technology Co., Ltd. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without

prior written consent of Shenzhen Neoway Technology Co., Ltd.

is the trademark of Shenzhen Neoway Technology Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective

holders.

Notice

This document provides guide for users to use the N720 OpenLinux.

This document is intended for system engineers (SEs), development engineers, and test engineers.

The information in this document is subject to change without notice due to product version update or

other reasons.

Every effort has been made in preparation of this document to ensure accuracy of the contents, but all

statements, information, and recommendations in this document do not constitute a warranty of any kind,

express or implied.

Shenzhen Neoway provides customers complete technical support. If you have any question, please

contact your account manager or email to the following email addresses:

[email protected]

[email protected]

Website: http://www.neoway.com


Copyright © Neoway Technology Co., Ltd iii

Revision Record

Revision Record

Version Changes Date

Version 1.0 Initial draft 2017-07


Copyright © Neoway Technology Co., Ltd iv

Contents

1 Compilation Commands .................................................................................................. 1

2 Software Upgrade .............................................................................................................. 2

2.1 Files .................................................................................................................................................... 2

2.2 Burning Files ...................................................................................................................................... 2

3 Code Examples ................................................................................................................... 4

3.1 Adding New Apps .............................................................................................................................. 4

3.2 Adding Nodes ..................................................................................................................................... 7

3.3 Adding Config File in /etc .................................................................................................................. 9

3.4 Commissioning UART ..................................................................................................................... 10

3.4.1 Modifying inittab .................................................................................................................... 10

3.4.2 Modify Source Code ............................................................................................................... 11



1 Compilation Commands

Compilation:

/build_N720_sdk.sh

Compile kernel

./build_N720_sdk.sh kernel

Compile system

./build_N720_sdk.sh system



2 Software Upgrade

Files generated after compilation are saved in the version directory.

2.1 Files

N720 IOS image files:

Appsboot.mbn aboot

Mdm9607-boot.img boot

Mdm9607-sysfs.ubi system

NON-HLOS.ubi modem

2.2 Burning Files

1. Enter the fastboot mode: adb reboot bootloader

2. Burn boot.



3. Burn system.

4. Burn modem.

5. Restart the module.

See N720_OpenLinux_Upgrade_Guide_V1.0.



3 Code Examples

3.1 Adding New Apps

Apps are stored in the data directory. For details, see port-bridge.

Follow the steps below to add a UART.

1. Save the UART app to the data directory.

2. Add makefile in the data/configure.ac file.



3. Add the UART directory to the /data/Makefile.am file.

4. Add debian folder and modify relevant files.



5. Compile after cleaning.

cd oe-core/

source build/conf/set_bb_env.sh

buildclean

cd ..

./build_N720_sdk.sh

6. Check the generated directories and files after the compilation.

(oe-core/build/tmp-glibc/work/mdm9607_perf-oe-linux-gnueabi/mdm-perf-image/1.0-r0/rootf

s/usr/bin)



3.2 Adding Nodes

Follow the steps below to add an I2C node to the device tree.

1. Modify N720_mdm9607.dtsi and N720_mdm9607-pinctrl.dtsi in /kernel/arch/arm/boot/dts/jsr.

2. Define the GPIO used for the I2C function in N720_mdm9607-pinctrl.dtsi.

i2c_4 {

i2c_4_active: i2c_4_active {

/* active state */

mux {

pins = “gpio18”, “gpio19”; /*SDA and SCL signals for

I2C*/

/*SDA uses GPIO18, and SCL uses GPIO19*/



function = “blsp_i2c4”; /*The GPIO supports

multiplexing. In i2c_4_active, the GPIO is used as blsp_i2c4.*/

};

config {

pins = "gpio18", "gpio19";

drive-strength = <2>; /*Set the drive strength of

GPIO18 and GPIO19 to 2 mA.*/

bias-disable; /*Options: bias-pull-up,

bias-pull-down, and bias-disable. Bias-disable indicates no-pull*/

};

};

i2c_4_sleep: i2c_4_sleep { /*i2c is in

sleep mode*/

/* suspended state */

mux {


function = “gpio”; /*Set pins to GPIO. */

};

config {


drive-strength = <2>; /*The drive

strength is 2 mA.*/

bias-pull-down;

};

};

};

3. Add a new I2C node to the device tree in N720_mdm9607.dtsi.

4. Obtain physical address and interrupt number according to spec.

i2c_4: i2c@78b8000 { /* BLSP1 QUP4 */ /*i2c_4 uses BLSP1

QUP4, the physical address of which is 78b8000. */

compatible = "qcom,i2c-msm-v2";

#address-cells = <1>;

#size-cells = <0>;

reg-names = "qup_phys_addr";

reg = <0x78b8000 0x600>; /*physical address

of i2c_4*/

interrupt-names = "qup_irq";

interrupts = <0 98 0>; /*according to spec, the

interrupt number of BLSP1 QUP4 is 98. Meaning of the third parameter:*/

/*1: low-to-high edge triggered；2: high-to-low edge triggered；3:

active high-level-sensitive；4: active low-level-sensitive*/

qcom,clk-freq-out = <400000>; /*I2C clock frequency

output, Hz*/



qcom,clk-freq-in = <19200000>; /*Clock frequency

input, HZ*/

clock-names = "iface_clk", "core_clk";

clocks = <&clock_gcc clk_gcc_blsp1_ahb_clk>,

<&clock_gcc clk_gcc_blsp1_qup4_i2c_apps_clk>;

pinctrl-names = “i2c_active”, “i2c_sleep”;

/*pinctrl used*/

pinctrl-0 = <&i2c_4_active>;

pinctrl-1 = <&i2c_4_sleep>;

qcom,noise-rjct-scl = <0>;

qcom,noise-rjct-sda = <0>;

qcom,master-id = <86>;

dmas = <&dma_blsp1 18 64 0x20000020 0x20>,

<&dma_blsp1 19 32 0x20000020 0x20>;

dma-names = "tx", "rx";

status = "ok";

};

5. Confirm whether I2C is configured successfully:

adb shell

cd /dev/

ls i2c*

The added I2C device is displayed.

3.3 Adding Config File in /etc

To add config_test.xml and nvdata.binnew in the /etc/data directory, follow steps below:

Step 1 Save the new config file and bin file in the /data directory.

Step 2 Modify data_git.bb and add file link.

\oe-core\meta-qcom\recipes\data\data_git.bb



Step 3 Check the comipilation.

3.4 Commissioning UART

UART can be commissioned in two methods: delete #cmdparams=’noinitrd rw

console=ttyHSL0 ,115200’ from oe-core/meta-msm/recipes/linux-quic/linux-quic_git.bb, or add

S:2345:respawn:/sbin/getty -L ttyHSL0 115200 console in inittab.

3.4.1 Modifying inittab

Step 1 Pull inittab from the system.

Step 2 Modify the inittab file.



Step 3 Import the modified inittab file into the system.

Step 4 UART login system: user name root; password oelinux123.

3.4.2 Modify Source Code

Delete #cmdparams=’noinitrd rw console=ttyHSL0 ,115200’ from

oe-core/meta-msm/recipes/linux-quic/linux-quic_git.bb.

Documents

N720 OpenLinux Source Code Developer Guidewless.ru/.../Neoway_N720_OpenLinux_Source_Code...0.pdf · N720_OpenLinux_Source_Code_Developer_Guide Copyright © Neoway Technology Co.,