mirror of
https://github.com/openharmony/device_board_talkweb.git
synced 2026-07-01 21:54:02 -04:00
!35 新增applications/204_hdf_i2c例程到master
Merge pull request !35 from 苏宗耀/master
This commit is contained in:
openharmony_sig_ci
@@ -0,0 +1,29 @@
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# Copyright (c) 2022 Talkweb Co., Ltd.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import("//kernel/liteos_m/liteos.gni")
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assert(defined(LOSCFG_DRIVERS_HDF_PLATFORM_I2C), "Must Config LOSCFG_DRIVERS_HDF_PLATFORM_I2C in kernel/liteos_m menuconfig!")
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module_name = get_path_info(rebase_path("."), "name")
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kernel_module(module_name) {
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sources =[
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"hdf_i2c_test.c",
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]
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include_dirs = [
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".",
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"//drivers/framework/include/platform",
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"//drivers/framework/include/utils",
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"//drivers/adapter/khdf/liteos_m/osal/include",
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"//drivers/framework/include/osal",
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]
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}
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+148
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# Niobe407开发板OpenHarmony基于HDF驱动框架编程开发——I2C
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I2C是一种串行，同步，半双工通信协议，允许在同一总线上同时存在多个主机和从机。I2C总线由两条线组成：串行数据线（SDA）和串行时钟（SCL）。两条线都需要上拉电阻。I2C组件为设备提供读写等操作。
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本示例将演示如何在Niobe407开发板上通过HDF驱动框架，使用I2C3接口对RJGT102芯片进行读写芯片UUID操作。
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## 接口说明
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```
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1. I2C open打开I2C函数:DevHandle I2cOpen(int16_t number);
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参数说明:
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number: I2C控制器ID
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return: 返回NULL,表示初始化成功
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2. I2C close打开I2C函数:void I2cClose(DevHandle handle);
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3. I2C transfer启动到I2C设备的自定义传输函数:int32_t I2cTransfer(DevHandle handle, struct I2cMsg *msgs, int16_t count);
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参数说明:
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handle: 指向通过{@link I2cOpen} 获得的I2C 控制器的设备句柄的指针
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msgs: 指示指向 I2C 传输消息结构体数组的指针
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count: 表示消息结构数组的长度
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return: 返回传输的消息结构数，表示成功，返回负数，表示失败
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```
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## 编译调试
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- 进入//kernel/liteos_m目录, 在menuconfig配置中进入如下选项:
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`(Top) → Platform → Board Selection → select board niobe407 → use talkweb niobe407 application → niobe407 application choose`
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- 选择 `204_hdf_i2c`
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- 在menuconfig的`(Top) → Driver`选项中使能如下配置:
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```
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[*] Enable Driver
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[*] HDF driver framework support
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[*] Enable HDF platform driver
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[*] Enable HDF platform uart driver
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```
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- 回到sdk根目录，执行`hb build -f`脚本进行编译。
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### 运行结果
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示例代码编译烧录代码后，按下开发板的RESET按键，通过串口助手查看日志
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```
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Entering scheduler
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[HDF:E/HDF_LOG_TAG]DeviceManagerStart in
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[HDF:I/devmgr_service]start svcmgr result 0
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[HDF:I/hcs_blob_if]CheckHcsBlobLength: the blobLength: 1248, byteAlign: 1
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[HDF:D/device_node]node HDF_PLATFORM_I2C_MANAGER property empty, match attr:
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[HDF:I/device_node]launch devnode HDF_PLATFORM_I2C_MANAGER
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[HDF:I/i2c_core]I2cManagerBind: Enter!
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[HDF:I/device_node]launch devnode HDF_PLATFORM_I2C_3
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[HDF:I/i2c_core]I2cCntlrAdd: use default lock methods!
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OHOS # hiview init success.
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<--------------- OHOS Application Start Here --------------->
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[HDF:E/HDF_LOG_TAG]into HdfI2cTestEntry!
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write uuid success: [11, 22, 33, 44, aa, bb, cc, dd]
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read uuid success: [11, 22, 33, 44, aa, bb, cc, dd]
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```
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## I2C HDF HCS配置文件解析
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- device_i2c_info.hcs文件位于/device/board/talkweb/niobe407/sdk/hdf_config/device_i2c_info.hcs,本例子使用的是i2c3
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```
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root {
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module = "talkweb,stm32f407";
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device_info {
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match_attr = "hdf_manager";
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template host {
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hostName = "";
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priority = 100;
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template device {
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template deviceNode {
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policy = 0;
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priority = 100;
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preload = 0;
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permission = 0664;
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moduleName = "";
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serviceName = "";
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deviceMatchAttr = "";
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}
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}
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}
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platform :: host {
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hostName = "platform_host";
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priority = 0;
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device_i2c :: device {
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i2c_manager :: deviceNode {
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policy = 2;
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priority = 50;
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moduleName = "HDF_PLATFORM_I2C_MANAGER";
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serviceName = "HDF_PLATFORM_I2C_MANAGER";
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}
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i2c3 :: deviceNode {
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policy = 0;
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priority = 100;
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preload = 0;
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permission = 0664;
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moduleName = "HDF_I2C";
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serviceName = "HDF_PLATFORM_I2C_3";
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deviceMatchAttr = "i2c3_config";
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}
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}
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}
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}
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}
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```
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- hdf_i2c.hcs文件位于/device/board/talkweb/niobe407/sdk/hdf_config/hdf_i2c.hcs,在此文件中配置串口对应的GPIO引脚信息，I2C配置信息
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```
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#include "device_i2c_info.hcs"
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root {
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platform {
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i2c_config {
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i2c3 {
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gpio{
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// 要配置的引脚个数，接下来的引脚名必须定义成gpio_num_1, gpio_num_2, gpio_num_3...
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gpio_num_max = 2; //配置的GPIO个数
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// port, pin, mode, speed, outputType, pull, alternate
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gpio_num_1 = [7, 7, 2, 3, 1, 0, 4]; //GPIO配置1
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gpio_num_2 = [7, 8, 2, 3, 1, 0, 4]; //GPIO配置2
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}
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driver : gpio {
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match_attr = "i2c3_config";
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port = 3; // I2C端口号(1~3)
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dev_mode = 0; //0 = master, 1= slave
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dev_addr = 0; //I2C 本机地址
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speed = 100000; //I2C速率
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}
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}
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}
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}
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}
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```
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## 关于I2C通讯测试芯片RJGT102
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RJGT102芯片为一款标准I2C通讯的加密芯片。
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这里将此芯片当成普通EEPROM使用，通过读写芯片内部UUID区域，以测试HDF I2C的基本收发功能。
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具体芯片读写操作时序及寄存器信息，请自行参考数据手册
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+217
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/*
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* Copyright (c) 2022 Talkweb Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "cmsis_os2.h"
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#include "i2c_if.h"
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#include "los_compiler.h"
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#include "los_task.h"
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#include "ohos_run.h"
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#include "samgr_lite.h"
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#include <hdf_log.h>
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#include <stdio.h>
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#include <uart_if.h>
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#define HDF_I2C_READ 1
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#define HDF_I2C_WRITE 0
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#define RJGT102_ADDR 0X68
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#define RJGT_CMD_REGISTER_ADDR 0XB0
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#define RJGT_MEM_REGISTER_ADDR 0XC0
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#define RJGT_OBJ_REGISTER_ADDR 0XB2
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#define RJGT_UUID_MEM_ADDR 0X90
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#define RJGT_STATUS_REGISTER_ADDR 0XB3
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#define RJGT_CMD_WRITE_UUID 0XAA
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#define RJGT_CMD_READ_MEM 0X0F
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static osThreadId_t g_i2cThreadId = NULL;
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static DevHandle g_i2cHandle = NULL;
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static int I2cWriteData(DevHandle handle, unsigned int devAddr, unsigned char *buffer, unsigned int length)
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{
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struct I2cMsg msg = {0};
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msg.addr = devAddr;
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msg.buf = buffer;
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msg.len = length;
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msg.flags = HDF_I2C_WRITE;
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if (I2cTransfer(handle, &msg, 1) != 1) {
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HDF_LOGE("[%s]: I2cWriteData fail \r\n", __func__);
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return HDF_FAILURE;
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}
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return HDF_SUCCESS;
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}
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static int I2cReadData(DevHandle handle, unsigned int devAddr, unsigned char *buffer, unsigned int length)
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{
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I2cWriteData(handle, devAddr, buffer, 1);
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struct I2cMsg msg = {0};
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msg.addr = devAddr;
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msg.buf = buffer;
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msg.len = length;
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msg.flags = HDF_I2C_READ;
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if (I2cTransfer(handle, &msg, 1) != 1) {
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HDF_LOGE("[%s]: I2cWriteData fail \r\n", __func__);
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return HDF_FAILURE;
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}
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return HDF_SUCCESS;
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}
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static void WriteRJGTCmdReg(unsigned char regVal)
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{
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unsigned char buffer[2] = {0};
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buffer[0] = RJGT_CMD_REGISTER_ADDR;
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buffer[1] = regVal;
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I2cWriteData(g_i2cHandle, RJGT102_ADDR, buffer, 2);
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}
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static void WriteRJGTMemBuf(unsigned char *buf, unsigned int len)
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{
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unsigned char buffer[len + 1];
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buffer[0] = RJGT_MEM_REGISTER_ADDR;
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memcpy(&buffer[1], buf, len);
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I2cWriteData(g_i2cHandle, RJGT102_ADDR, buffer, len + 1);
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}
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static void ReadRJGTMemBuf(unsigned char *buf, unsigned int len)
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{
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buf[0] = RJGT_MEM_REGISTER_ADDR;
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I2cReadData(g_i2cHandle, RJGT102_ADDR, buf, len);
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}
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static unsigned char GetRJGTWriteStateReg(void)
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{
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unsigned char buffer[1] = {RJGT_STATUS_REGISTER_ADDR};
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I2cReadData(g_i2cHandle, RJGT102_ADDR, buffer, 1);
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return buffer[0];
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}
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static void WriteRJGTObjReg(unsigned char regVal)
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{
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unsigned char buffer[2] = {0};
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buffer[0] = RJGT_OBJ_REGISTER_ADDR;
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buffer[1] = regVal;
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I2cWriteData(g_i2cHandle, RJGT102_ADDR, buffer, 2);
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}
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static bool Write8ByteUUID(unsigned char *buf)
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{
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WriteRJGTCmdReg(0X00);
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WriteRJGTMemBuf(buf, 8);
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WriteRJGTCmdReg(RJGT_CMD_WRITE_UUID);
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osDelay(100);
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int ret = GetRJGTWriteStateReg();
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if (ret != 0X01) {
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printf("Write8ByteUUID fail[%02X]\r\n", ret);
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return false;
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}
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return true;
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}
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static bool Read8ByteUUID(unsigned char *buf)
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{
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WriteRJGTCmdReg(0X00);
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WriteRJGTObjReg(RJGT_UUID_MEM_ADDR);
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WriteRJGTCmdReg(RJGT_CMD_READ_MEM);
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osDelay(100);
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int ret = GetRJGTWriteStateReg();
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if (ret != 0X01) {
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printf("Read8ByteUUID fail[%02X]\r\n", ret);
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return false;
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}
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ReadRJGTMemBuf(buf, 8);
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return true;
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}
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static void exitThread(void)
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{
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if (g_i2cHandle != NULL) {
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I2cClose(g_i2cHandle);
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}
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osThreadTerminate(g_i2cThreadId);
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g_i2cThreadId = NULL;
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}
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static void *HdfI2cTestEntry(void *arg)
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{
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HDF_LOGE("into HdfI2cTestEntry!\n");
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(void *)arg;
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unsigned char ret = 0;
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unsigned char busId = 3;
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g_i2cHandle = I2cOpen(busId);
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if (g_i2cHandle == NULL) {
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HDF_LOGE("%s: Open I2c:%u fail!\r\n", __func__, busId);
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exitThread();
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return;
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}
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osDelay(100);
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unsigned char uuidBuf[8] = {0x11, 0x22, 0x33, 0x44, 0xaa, 0xbb, 0xcc, 0xdd};
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if (Write8ByteUUID(uuidBuf) != true) {
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exitThread();
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return;
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}
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printf("write uuid success: [%02x, %02x, %02x, %02x, %02x, %02x, %02x, %02x]\r\n",
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uuidBuf[0], uuidBuf[1], uuidBuf[2], uuidBuf[3], uuidBuf[4], uuidBuf[5], uuidBuf[6], uuidBuf[7]);
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osDelay(100);
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memset(uuidBuf, 0, sizeof(uuidBuf));
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if (Read8ByteUUID(uuidBuf) != true) {
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exitThread();
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return;
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}
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printf("read uuid success: [%02x, %02x, %02x, %02x, %02x, %02x, %02x, %02x]\r\n",
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uuidBuf[0], uuidBuf[1], uuidBuf[2], uuidBuf[3], uuidBuf[4], uuidBuf[5], uuidBuf[6], uuidBuf[7]);
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while (1) {
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osDelay(1000);
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}
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}
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void StartHdfI2cTest(void)
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{
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UINT32 uwRet;
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UINT32 taskID;
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TSK_INIT_PARAM_S stTask = {0};
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stTask.pfnTaskEntry = (TSK_ENTRY_FUNC)HdfI2cTestEntry;
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stTask.uwStackSize = 0X1000;
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stTask.pcName = "HdfI2cTestEntry";
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stTask.usTaskPrio = 2;
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uwRet = LOS_TaskCreate(&taskID, &stTask);
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if (uwRet != LOS_OK) {
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printf("Task1 create failed\n");
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}
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}
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OHOS_APP_RUN(StartHdfI2cTest);
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@@ -52,6 +52,9 @@ choice APPLICATION_CHOOSE_NIOBE407
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config NIOBE407_USE_203_HDF
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bool
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prompt "203_hdf_usart_read_write"
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config NIOBE407_USE_204_HDF
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bool
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prompt "204_hdf_i2c"
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config NIOBE407_USE_205_HDF
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bool
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prompt "205_hdf_watchdog"
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@@ -97,6 +100,7 @@ config NIOBE407_APPLICATION_NAME
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default "201_hdf_gpio_key" if NIOBE407_USE_201_HDF
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default "202_hdf_spi_flash" if NIOBE407_USE_202_HDF
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default "203_hdf_usart" if NIOBE407_USE_203_HDF
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default "204_hdf_i2c" if NIOBE407_USE_204_HDF
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default "205_hdf_watchdog" if NIOBE407_USE_205_HDF
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default "206_hdf_pwm" if NIOBE407_USE_206_HDF
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default "301_network_tcpclient" if NIOBE407_USE_301_NETWORK
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Reference in New Issue
Block a user