一 概述
状态指示灯是最常见的一种人机交互方式。常用做法是,通过不同的闪烁频率,来告知用户,目前设备所处的状态,是正常,故障,还是其它状态。
指示灯的额定工作电压有220, 110,48,36,24,12,6,3 V等。受控制电路通过电流大小的限制,同时也为了延长灯泡的使用寿命,常采取在灯泡前加一限流电阻或用两只灯泡串联使用, 以降低工作电压。
嵌入式中的指示灯通常情况下都和主控电压等级一致,部分场景可能会是5V,12V等。
二 实现方法
指示灯可以有常亮,常闭,闪动三种状态。其中常亮和常闭最简单,只需要在合适的时候将灯点亮,或者关闭,就可以实现,程序逻辑不复杂,只需要调用一次GPIO的写函数就可以。但是闪动状态就不同了,闪烁的频率不同,代表的状态不同。如何实现指示灯按照不同的频率闪烁呢?
1 延时函数
指示灯按照不同频率闪烁,最简单的办法就是使用延时函数,不同的延时来实现不同的闪烁频率,例如有如下的代码实现:
LED(on);//打开led
delay(100);//延时100ms
LED(off);//关闭led
delay(900);//延时900ms
上述代码实现了1s内,亮100ms,灭900ms。
这种办法,如果在裸机情况下无法使用,因为延时会导致cpu一直卡在延时函数,无法进行正常运行。因此延时函数的办法,只适用于在使用rtos的情况下,可以单独创建一个任务,来实现LED不同频率的闪动。
2 定时器中断
假设我们指示灯的闪烁频率不同,可能是100ms,可能是500ms。那我们可以实现一个100ms的定时器,在定时器中,配合计数,来实现不同频率的闪动。例如:
{
if(count == 0)
{
LED(on);
}
Else if(count < 10)
{
LED(off);
}
count++;
if(count >= 10)
{
Count = 0;
}
}
上述代码是一个定时器回调函数,定时器每100ms超时后,会进入time_callback中。第一次进入count的值是0,这时候指示灯被点亮。之后9次进入回调函数,指示灯都会被关闭。当第10次执行回调函数时,count会被清零。重新进入一次循环。如此循环往复。
本组件实现的就是第二种方法。当然实际代码可能比示例要稍微复杂些。但是道理是类似的。
三 组件的使用。
1 Gitee链接地址
Demo位于amaziot_bloom_os_sdksamplelibraries8.1_led_status
Gitee源码地址:https://gitee.com/ning./hongdou
Github源码地址:https://github.com/ayumid/hongdou
编译指令:.build.bat -l .amaziot_bloom_os_sdksamplelibraries8.1_led_status
2 组件功能介绍
应于于空开等需要状态指示灯的项目中。可以控制设备在不同状态下,LED以不同的频率进行闪烁。从而向用户指示当前设备工作的状态。
3 代码讲解
1 lib_led_status_level_flip
功能:该函数用于,改变LED 亮 灭 状态。
参数:无
返回值:无
示例:
lib_led_status_level_flip();
2 lib_led_status_init
功能:该函数用于,初始化LED GPIO 和 定时器。
参数:无
返回值:无
示例:
lib_led_status_init();
3 lib_led_status_lighting
功能:该函数用于,LED常亮。
参数:无
返回值:无
示例:
lib_led_status_lighting();
4 lib_led_status_100ms_flashing1
功能:该函数用于,100ms闪烁1次。
参数:无
返回值:无
示例:
lib_led_status_100ms_flashing1();
5 lib_led_status_100ms_flashing2
功能:该函数用于,100ms闪烁两次。
参数:无
返回值:无
示例:
lib_led_status_100ms_flashing2();
6 lib_led_status_100ms_flashing3
功能:该函数用于,100ms闪烁三次。
参数:无
返回值:无
示例:
lib_led_status_100ms_flashing3();
7 lib_led_status_1s_flashing
功能:该函数用于,间隔1s闪烁。
参数:无
返回值:无
示例:
lib_led_status_1s_flashing();
8 lib_led_status_100ms_flashing
功能:该函数用于,间隔100ms闪烁。
参数:无
返回值:无
示例:
lib_led_status_100ms_flashing2();
9 lib_led_status_factory
功能:该函数用于,工厂模式闪烁。
参数:无
返回值:无
示例:
lib_led_status_factory();
10 lib_led_status_timer_cbk
功能:该函数用于,定时器回调函数,根据不同模式调用不同的api。
参数:无
返回值:无
示例:
lib_led_status_timer_cbk(NOTLIVE);
4 Demo实战
4.1 创建一个Demo
复制3.2-inter_at示例工程,到同一个文件夹下,修改文件名为8.2_power_alarm,如图:
4.2 修改makefile
增加文件组件所在目录头文件路径,和源文件路径,如图:
4.3 增加头文件
使用代码编辑器,将新建的工程文件加入代码编辑器中,打开main.c,修改main.c,加入am.h等头文件,如图:
4.4 修改代码
在Phase2Inits_exit 创建一个任务,如图:
4.5 宏定义介绍
sample_led_status_uart_printf
输出日志到DEBUG 串口,日志比较少,可以输出到这个串口,如果日志比较多,需要输出到usb口,以免不必要的问题出现
sample_led_status_catstudio_printf
输出日志到USB 串口,使用catstudio查看,catstudio查看日志需要更新对应版本mdb.txt文件,软件打开filtter过滤日志,只查看用户输出的日志
SAMPLE_LED_STATUS_TASK_STACK_SIZE
栈空间宏定义
4.6 全局变量介绍
SAMPLE_LED_STATUS_TASK_STACK_SIZE
任务栈空间,本例使用数组实现,用户在做项目时,可以预先估算下当先任务需要的大致栈空间,OS没有提供可以查看栈空间使用情况的API
sample_led_status_task_ref
任务指针
4.7 函数介绍
Phase1Inits_enter
底层初始化,本例空
Phase1Inits_exit
底层初始化,本例空
Phase2Inits_enter
底层初始化,本例空
Phase2Inits_exit
创建主任务,初始化消息队列,定时器,任务等。
代码片段:
int ret; ret = OSATaskCreate(&sample_led_status_task_ref, sample_led_status_task_stack, SAMPLE_LED_STATUS_TASK_STACK_SIZE, 120, "sample_gpio_task_gpio", sample_gpio_task_gpio, NULL); ASSERT(ret == OS_SUCCESS); sample_led_status_uart_printf("Phase2Inits_exitn");
sample_gpio_task_gpio
主任务,间隔10s更改led状态。
代码片段:
//每一种形态显示10s lib_led_status = NORMAL; sample_led_status_uart_printf("%s[%d] NORMAL", __FUNCTION__, __LINE__); sample_led_status_sleep(10); lib_led_status = NOGPRS; sample_led_status_uart_printf("%s[%d] NOGPRS", __FUNCTION__, __LINE__); sample_led_status_sleep(10); lib_led_status = NOSERVER; sample_led_status_uart_printf("%s[%d] NOSERVER", __FUNCTION__, __LINE__); sample_led_status_sleep(10); lib_led_status = UNREGISTERED; sample_led_status_uart_printf("%s[%d] UNREGISTERED", __FUNCTION__, __LINE__); sample_led_status_sleep(10); lib_led_status = UPGRADE; sample_led_status_uart_printf("%s[%d] UPGRADE", __FUNCTION__, __LINE__); sample_led_status_sleep(10); lib_led_status = NOTLIVE; sample_led_status_uart_printf("%s[%d] NOTLIVE", __FUNCTION__, __LINE__); sample_led_status_sleep(10); lib_led_status = FACTORY; sample_led_status_uart_printf("%s[%d] FACTORY", __FUNCTION__, __LINE__); sample_led_status_sleep(10);
4.8 编译
在SDK根目录打开命令行,输入命令.build.bat -l .amaziot_bloom_os_sdksamplelibraries8.1_led_status
PS F:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRF λ .build.bat -l .amaziot_bloom_os_sdksamplelibraries8.1_led_status 子目录或文件 outbin 已经存在。 命令语法不正确。 子目录或文件 buildobj 已经存在。 gnumake: Entering directory `F:/3.asr-b/cat.1-asr1606/1.software/BlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRF/amaziot_bloom_os_sdk/sample/libraries/8.1_led_status' armcc.exe -c --cpu Cortex-R4 --no_unaligned_access -g -O2 --apcs /inter --diag_suppress 2084,1,2,177,188,223,550,1296,2795,6319,9931,9933 --diag_error=warning --gnu --thumb --loose_implicit_cast -DDATA_COLLECTOR_IMPL -DISPT_OVER_SSP -DDIAG_SSP_DOUBLE_BUFFER_USE_DYNAMIC_ALLOCATION -DENV_XSCALE -DL1_DCXO_ENABLED -DLTE_HIGH_MOBILITY_OPTIMIZATION -DRUN_XIP_MODE -DCRANE_Z2 -DCA_LONG_IPC_MSG -DNEZHA3 -DNEZHA3_1826 -DUPGRADE_PLMS -DUPGRADE_PLMS_SR -DLTE_GSMMULTIBCCH -DGPLC_LTE_RSSI_SCAN -DL1V_NEW_RSSI -DUPGRADE_PLMS_3G -DUPGRADE_PLMS_L1 -DUPGRADE_FG_PLMS -DFG_PLMS_URR -DUPGRADE_L1A_FG_PLMS -DUPGRADE_PLMS_STAGE_2 -DUPGRADE_MBCCH 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-IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xpcaclwipv4v6srcincludenetif -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhopmmi_matinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xtavorArbelinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xtavorenvinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhoptelephonymodeminc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xpcacdusterinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xpcacfotainc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhalI2Cinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhalACIPCinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xsoftutilfatsysflash -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xsoftutilFDIsrcINCLUDE -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhalMMUinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xsoftutilFDIsrcFDI_ADD -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xsoftutilFDIsrcFM_INC -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xsoftutilfatsysfshdr -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xsoftutillittlefsinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xpcacttsinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xpcacdialinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xsoftutilcsw_memoryinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhoputilitiesinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhopcommpminc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xsoftutilnvminc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xsoftutilEEhandlerinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xsoftutilEEhandlersrc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhopRTCinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhoptelephonyci_clientinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhalBT_deviceinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhalUARTinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhopmrdinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhopdmainc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xsoftutilsoftutilinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhalSPIinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xpcacwebsocketinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xpcacatnet_srvinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xsoftutilfotacomminc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xaud_swAudioinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xaud_swACM_COMMinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xaud_swaudio_stubsrc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhopaaminc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xaud_swAudioHALinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xhaldbgshellinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFincludeasr160xpcacopencpuinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFamaziot_bloom_os_sdkutils -IF:/3.asr-b/cat.1-asr1606/1.software/BlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRF/amaziot_bloom_os_sdk/sample/libraries/8.1_led_statusaminc -IF:/3.asr-b/cat.1-asr1606/1.software/BlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRF/amaziot_bloom_os_sdk/sample/libraries/8.1_led_statusatcmdsinc -IF:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFamaziot_bloom_os_sdklibrariesair_4g_swair_sw4_tuya -o buildobj/ext_at_cmds.o F:/3.asr-b/cat.1-asr1606/1.software/BlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRF/amaziot_bloom_os_sdk/sample/libraries/8.1_led_status/atcmds/src/ext_at_cmds.c armlink.exe buildobj/main.o buildobj/ext_at_cmds.o buildobj/ext_at_controller.o buildobj/am_ty_sw_led_status.o -o F:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFoutbinArbel_PMD2NONE_40M.axf --via F:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFprebuilt_1606lArbel_PMD2NONE_targ_objliblist.txt --elf --scatter F:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFprebuilt_1606lCrane_DS_4M_Ram_2M_Flash_XIP_CIPSRAM_Common_SingleSIM.sct --predefine="-DLTEONLY_THIN_SINGLE_SIM" --map --symbols --info sizes,totals --list F:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFoutbinArbel_PMD2NONE_40M.map --keep init.o(Header) --keep init.o(Vectors) --diag_suppress 6312,6314,6319,6329 --feedback F:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFoutfeedbackLinkOptLteonlyThin_SingleSim_NoSMS.txt F:3.asr-bcat.1-asr16061.softwareBlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRFtoolsbuildimage_1606l.bat SDK_PROD_TYPE : [DM] SDK_CUST_SKU : [THIN_SINGLE_SIM_NO_SMS] SDK_PS_MODE : [LTEONLY] SDK_CHIP_VER : [Z2A0] SDK_OS_TYPE : [TX] Platform Convertion Tools v4.01 with PS option extension Convertion done! |INPUT |outbincp_1606L.bin |MARK |NAME |EXEADDR .LOADADDR.LENGTH .CPZLADDR|COMPRESS STASTIC | |--------|--------|--------.--------.--------.--------|------------------------------| |This Is LteOnly 4M| |RW_CPZ_1|DDR_RW_ |7e119000.800643b8.0000cddc.80065000|0000cddc->00003000 |This Is LteOnly 4M| |RW_CPZ_2|PS_NCAH |7e388000.80071194.00001300.80068000|00001300->00001000 |This Is LteOnly 4M| |RW_CPZ_3|ITCM |7e3dac00.80072494.0000f51c.80069000|0000f51c->0000a000 |This Is LteOnly 4M| |RW_CPZ_4|CODE_PS |7e1aa000.800819b0.0002fe38.80073000|0002fe38->0001e000 |This Is LteOnly 4M| |RW_CPZ_5|CODEPSB |7e1dc000.800b17e8.000339c0.80091000|000339c0->0001b000 |This Is LteOnly 4M| |RW_CPZ_6|CODEPSC |7e213000.800e51a8.000323ec.800ac000|000323ec->0001b000 |This Is LteOnly 4M| |RW_CPZ_7|CODEPSD |7e249000.80117594.00028d88.800c7000|00028d88->0001a000 |This Is LteOnly 4M| |RW_CPZ_8|CODEPSE |7e277000.8014031c.0002e310.800e1000|0002e310->0001a000 |This Is LteOnly 4M| |RW_CPZ_9|CODEPSF |7e2a9000.8016e62c.0001c948.800fb000|0001c948->00011000 |This Is LteOnly 4M| |RW_CPZ_A|CODE_PL |7e2ca000.8018af74.0002fa44.8010c000|0002fa44->0001e000 |This Is LteOnly 4M| |RW_CPZ_B|CODEPLB |7e2fa000.801ba9b8.00039058.8012a000|00039058->00021000 |This Is LteOnly 4M| |RW_CPZ_C|CODEPLC |7e337000.801f3a10.000268d4.8014b000|000268d4->00011000 |--------|--------|--------.--------.--------.--------|------------------------------| | | 0x002032e4 -> 0x00145000| | | 2.012(MB) -> 1.270(MB)| |------------------------------------------------------------------------------------| cp_1606L.axf cp_1606L.bin cp_1606L.map gnumake: Leaving directory `F:/3.asr-b/cat.1-asr1606/1.software/BlOOM_OS_1606_OPENCPU_1191_A09_WIHT_NEWRF/amaziot_bloom_os_sdk/sample/libraries/8.1_led_status' "copy NEZHAC_CP_CNR_MIFI_TX.bin to ./ " 已复制 1 个文件。
4.9 生成固件
参考入门中开发工具,生成工具。
4.10 测试
测试步骤:
参考编译教程,和文档开头的编译指令,进行编译
按照编译教程选择对应的选项
烧录
4.11 固件
上电后,debug串口会打印出计算出的数据;
5 生态组件链接
无
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这里是为物联网人构建的技术应用百科,以便帮助你更快更简单的开发物联网产品。
Cellular IoT Wiki初心:
在我们长期投身于蜂窝物联网 ODM/OEM 解决方案的实践过程中,一直被物联网技术碎片化与产业资源碎片化的问题所困扰。从产品定义、芯片选型,到软硬件研发和测试,物联网技术的碎片化以及产业资源的碎片化,始终对团队的产品开发交付质量和效率形成制约。为了减少因物联网碎片化而带来的重复开发工作,我们着手对物联网开发中高频应用的技术知识进行沉淀管理,并基于 Bloom OS 搭建了不同平台的 RTOS 应用生态。后来我们发现,很多物联网产品开发团队都面临着相似的困扰,于是,我们决定向全体物联网行业开发者开放奇迹物联内部沉淀的应用技术知识库 Wiki,期望能为更多物联网产品开发者减轻一些重复造轮子的负担。
Cellular IoT Wiki沉淀的技术内容方向如下:
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