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深圳做门户网站的网络公司,广州个性化网站开发,外贸推广,wordpress建的网站这篇文章是讲解的pwm控制三色灯的部分#xff0c;这部分也是后续全彩智能灯的基础。 硬件原理如下 IO管脚定义在hi-12f_v1.1.2-规格书-20211202.pdf文档中 GPIO API API名称 说明 unsigned int IoTGpioInit(unsigned int id); GPIO模块初始化 hi_u32 hi_io_set_func(hi_i…这篇文章是讲解的pwm控制三色灯的部分这部分也是后续全彩智能灯的基础。 硬件原理如下 IO管脚定义在hi-12f_v1.1.2-规格书-20211202.pdf文档中 GPIO API API名称 说明 unsigned int IoTGpioInit(unsigned int id); GPIO模块初始化 hi_u32 hi_io_set_func(hi_io_name id, hi_u8 val); 配置某个IO的复用功能 unsigned int IoTPwmInit(unsigned int port); 初始化一个PWM设备 unsigned int IoTPwmStart(unsigned int port, unsigned short duty, unsigned int freq); 根据给定的输出频率和占空比从指定端口启动PWM信号输出。 unsigned int IoTPwmStop(unsigned int port); 停止来自指定端口的PWM信号输出。
在官方给的代码中IoTPwmStart占空比参数范围为1-99也就是不能达到全灭和全亮的程度。所以对源码进行修改。 修改D:\DevEcoProjects\test\src\device\hisilicon\hispark_pegasus\hi3861_adapter\hals\iot_hardware\wifiiot_lite\hal_iot_pwm.c unsigned int IoTPwmStart(unsigned int port, unsigned short duty, unsigned int freq) {unsigned short hiDuty;unsigned short hiFreq;if ((freq 0) || (duty DUTY_MAX)) {return IOT_FAILURE;}if ((CLK_160M / freq) SHORT_MAX) {return IOT_FAILURE;}hiFreq (unsigned short)(CLK_160M / freq);hiDuty (duty * hiFreq) / DUTY_MAX;return hi_pwm_start((hi_pwm_port)port, hiDuty, hiFreq); } 使其支持0和100. 修改D:\DevEcoProjects\test\src\device\hisilicon\hispark_pegasus\sdk_liteos\platform\drivers\pwm\hi_pwm.c hi_u32 hi_pwm_start(hi_pwm_port port, hi_u16 duty, hi_u16 freq) {hi_u32 ret;if ((pwm_check_port(port) ! HI_ERR_SUCCESS) || (freq 0)|| (duty freq)) {return HI_ERR_PWM_INVALID_PARAMETER;}if (pwm_is_init(port) HI_FALSE) {return HI_ERR_PWM_NO_INIT;}ret pwm_lock(port);if (ret ! HI_ERR_SUCCESS) {return ret;}pwm_set_enable(port, HI_TRUE);pwm_set_freq(port, freq);pwm_set_duty(port, duty);pwm_take_effect(port);return pwm_unlock(port); } 同样是使其支持0和100. 以上就是对源码的修改。下面是测试代码部分。 修改D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\BUILD.gn文件

Copyright © 2023 Beijing HuaQing YuanJian Education Technology Co., Ltd

Licensed under the Apache License, Version 2.0 (the License);

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an AS IS BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License. import(//build/lite/config/component/lite_component.gni)lite_component(demo) {features [#base_00_helloworld:base_helloworld_example,#base_01_led:base_led_example,#base_02_loopkey:base_loopkey_example,#base_03_irqkey:base_irqkey_example,#base_04_adc:base_adc_example,base_05_pwm:base_pwm_example,]

} 创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\base_05_pwm文件夹 文件夹中创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\base_05_pwm\base_pwm_example.c文件D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\base_05_pwm\BUILD.gn文件

Copyright © 2023 Beijing HuaQing YuanJian Education Technology Co., Ltd

Licensed under the Apache License, Version 2.0 (the License);

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

#

http://www.apache.org/licenses/LICENSE-2.0

#

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an AS IS BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License. static_library(base_pwm_example) {sources [base_pwm_example.c,]include_dirs [//utils/native/lite/include,//kernel/liteos_m/kal/cmsis,//base/iot_hardware/peripheral/interfaces/kits,//vendor/hqyj/fs_hi3861/common/bsp/include]

} /** Copyright © 2023 HiHope Open Source Organization .* Licensed under the Apache License, Version 2.0 (the License);* you may not use this file except in compliance with the License.* You may obtain a copy of the License at** http://www.apache.org/licenses/LICENSE-2.0** Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an AS IS BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/#include stdio.h #include unistd.h#include cmsis_os2.h #include hi_io.h #include iot_errno.h #include iot_gpio.h #include iot_pwm.h #include ohos_init.h#define RED_LED_PIN_NAME HI_IO_NAME_GPIO_10 #define RED_LED_PIN_FUNCTION WIFI_IOT_IO_FUNC_GPIO_10_GPIO #define GREEN_LED_PIN_NAME HI_IO_NAME_GPIO_2 #define GREEN_LED_PIN_FUNCTION WIFI_IOT_IO_FUNC_GPIO_2_GPIO #define BLUE_LED_PIN_NAME HI_IO_NAME_GPIO_7 #define BLUE_LED_PIN_FUNCTION WIFI_IOT_IO_FUNC_GPIO_7_GPIO#define PWM_FREQ_DIVITION 64000 #define DELAY_US 30000 #define STACK_SIZE (4096) #define PWM0_PORT_NUM (0) #define PWM1_PORT_NUM (1) #define PWM2_PORT_NUM (2)static void PWMLedDemoTask(void) {// pwm占空比记录变量unsigned short duty0 0, duty1 40, duty2 80;// 记录占空比是增加还是减少hi_bool duty0_increase HI_TRUE;hi_bool duty1_increase HI_TRUE;hi_bool duty2_increase HI_TRUE;// 炫彩灯板的红灯hi_io_set_func(RED_LED_PIN_NAME, HI_IO_FUNC_GPIO_10_PWM1_OUT);hi_io_set_func(GREEN_LED_PIN_NAME, HI_IO_FUNC_GPIO_2_PWM2_OUT);hi_io_set_func(BLUE_LED_PIN_NAME, HI_IO_FUNC_GPIO_7_PWM0_OUT);IoTPwmInit(PWM0_PORT_NUM);IoTPwmInit(PWM1_PORT_NUM);IoTPwmInit(PWM2_PORT_NUM);while (1) {// use PWM control RED LED brightness// 蓝灯呼吸代码IoTPwmStart(PWM0_PORT_NUM, duty0, PWM_FREQ_DIVITION);if (duty0_increase) {duty0;if (duty0 100) {// 自增超过100后需要进行自减duty0_increase HI_FALSE;duty0 99;}} else {duty0–;if (duty0 0) {// 自减到0后需要进行自增duty0_increase HI_TRUE;}}// 红灯呼吸代码IoTPwmStart(PWM1_PORT_NUM, duty1, PWM_FREQ_DIVITION);if (duty1_increase) {duty1;if (duty1 100) {duty1_increase HI_FALSE;duty1 99;}} else {duty1–;if (duty1 0) {duty1_increase HI_TRUE;}}// 绿灯呼吸代码IoTPwmStart(PWM2_PORT_NUM, duty2, PWM_FREQ_DIVITION);if (duty2_increase) {duty2;if (duty2 100) {duty2_increase HI_FALSE;duty2 99;}} else {duty2–;if (duty2 0) {duty2_increase HI_TRUE;}}usleep(DELAY_US);} }static void PWMLedDemo(void) {osThreadAttr_t attr;// set Red LED pin to GPIO functionIoTGpioInit(RED_LED_PIN_NAME);attr.name PWMLedDemoTask;attr.attr_bits 0U;attr.cb_mem NULL;attr.cb_size 0U;attr.stack_mem NULL;attr.stack_size STACK_SIZE;attr.priority osPriorityNormal;if (osThreadNew(PWMLedDemoTask, NULL, attr) NULL) {printf([ColorfulLightDemo] Falied to create PWMLedDemoTask!\n);} } APP_FEATURE_INIT(PWMLedDemo);目录结构 │ config.json │ ├─common │ └─bsp │ ├─include │ └─src ├─demo │ │ BUILD.gn │ │ │ ├─base_00_helloworld │ │ base_helloworld_example.c │ │ BUILD.gn │ │ │ ├─base_01_led │ │ base_led_example.c │ │ BUILD.gn │ │ │ ├─base_02_loopkey │ │ base_loopkey_example.c │ │ BUILD.gn │ │ │ ├─base_03_irqkey │ │ base_irqkey_example.c │ │ BUILD.gn │ │ │ ├─base_04_adc │ │ base_adc_example.c │ │ BUILD.gn │ │ │ └─base_05_pwm │ base_pwm_example.c │ BUILD.gn │ └─doc│ HarmonyOS开发板实验指导书 v2.1.pdf│ 华清远见 FS_Hi3861开发指导.md│ 华清远见 FS_Hi3861新手入门手册.md│├─board│ FS-Hi3861-V4.2.pdf│ FS-Hi3861QDB-V3.2.pdf│ hi-12f_kit_v1.1.0规格书-20211025.pdf│ hi-12f_v1.1.2-规格书-20211202.pdf│ nodemcu-hi-07s_12f-kit_v1.1-20210913.pdf│ RTplay2.01_2024-06-14.pdf│└─figures 使用build编译成功后使用upload进行烧录。 运行效果如下三色灯颜色会变化。