N720 OpenLinux Source Code Developer Guide

Transcription

1 N720 OpenLinux Source Code Developer Guide Version 1.0 Copyright Neoway Technology Co., Ltd 1

2 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 to the following addresses: Sales@neoway.com Support@neoway.com Website: Copyright Neoway Technology Co., Ltd ii

3 Revision Record Version Changes Date Version 1.0 Initial draft Revision Record Copyright Neoway Technology Co., Ltd iii

4 Contents 1 Compilation Commands Software Upgrade Files Burning Files Code Examples Adding New Apps Adding Nodes Adding Config File in /etc Commissioning UART Modifying inittab Modify Source Code Copyright Neoway Technology Co., Ltd iv

5 1 Compilation Commands Compilation: /build_n720_sdk.sh Compile kernel./build_n720_sdk.sh kernel Compile system./build_n720_sdk.sh system Copyright Neoway Technology Co., Ltd 1

6 2 Software Upgrade Files generated after compilation are saved in the version directory. 2.1 Files N720 IOS image files: Appsboot.mbn Mdm9607-boot.img aboot boot Mdm9607-sysfs.ubi NON-HLOS.ubi system modem 2.2 Burning Files 1. Enter the fastboot mode: adb reboot bootloader 2. Burn boot. Copyright Neoway Technology Co., Ltd 2

7 3. Burn system. 4. Burn modem. 5. Restart the module. See N720_OpenLinux_Upgrade_Guide_V1.0. Copyright Neoway Technology Co., Ltd 3

8 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. Copyright Neoway Technology Co., Ltd 4

9 3. Add the UART directory to the /data/makefile.am file. 4. Add debian folder and modify relevant files. Copyright Neoway Technology Co., Ltd 5

10 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) Copyright Neoway Technology Co., Ltd 6

11 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*/ Copyright Neoway Technology Co., Ltd 7

12 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>; GPIO18 and GPIO19 to 2 ma.*/ /*Set the drive strength of bias-disable; /*Options: bias-pull-up, bias-pull-down, and bias-disable. Bias-disable indicates no-pull*/ i2c_4_sleep: i2c_4_sleep { sleep mode*/ /* suspended state */ mux { pins = "gpio18", "gpio19"; /*i2c is in function = gpio ; /*Set pins to GPIO. */ config { pins = "gpio18", "gpio19"; drive-strength = <2>; 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. /*The drive 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>; of i2c_4*/ interrupt-names = "qup_irq"; /*physical address 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>; output, Hz*/ /*I2C clock frequency Copyright Neoway Technology Co., Ltd 8

13 qcom,clk-freq-in = < >; 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_blsp x x20>, <&dma_blsp x x20>; 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. /*Clock frequency Step 2 Modify data_git.bb and add file link. \oe-core\meta-qcom\recipes\data\data_git.bb Copyright Neoway Technology Co., Ltd 9

14 Step 3 Check the comipilation. 3.4 Commissioning UART UART can be commissioned in two methods: delete #cmdparams= noinitrd rw console=ttyhsl0, from oe-core/meta-msm/recipes/linux-quic/linux-quic_git.bb, or add S:2345:respawn:/sbin/getty -L ttyhsl console in inittab Modifying inittab Step 1 Pull inittab from the system. Step 2 Modify the inittab file. Copyright Neoway Technology Co., Ltd 10

15 Step 3 Import the modified inittab file into the system. Step 4 UART login system: user name root; password oelinux Modify Source Code Delete #cmdparams= noinitrd rw console=ttyhsl0, from oe-core/meta-msm/recipes/linux-quic/linux-quic_git.bb. Copyright Neoway Technology Co., Ltd 11