有一周多没有时间弄这个板子了,这段时间实在是有点忙,这周末抓紧了点时间弄了弄。资料确实有点少了,只能一点一点的摸索。弄了一个按键控制LED的程序。
核心板上有一个LED以及按键,我们查看原理图可以知道,LED连接到GPIO9,按键连接到了GPIO5.
所以只需要初始化这两个引脚作为输入输出就行了,还是比较简单的,因为是学习,所以从简单的开始入手。
初始化代码如下:
LED初始化,初始化为输出:
- GpioInit();
- IoSetFunc(WIFI_IOT_IO_NAME_GPIO_9, WIFI_IOT_IO_FUNC_GPIO_9_GPIO);
- GpioSetDir(WIFI_IOT_IO_NAME_GPIO_9, WIFI_IOT_GPIO_DIR_OUT);
复制代码
KEY初始化函数,初始化为输入:
- GpioInit();
- IoSetFunc(WIFI_IOT_IO_NAME_GPIO_5, WIFI_IOT_IO_FUNC_GPIO_5_GPIO);
- GpioSetDir(WIFI_IOT_IO_NAME_GPIO_5, WIFI_IOT_GPIO_DIR_IN);
复制代码
如何调用呢?
看下边:
控制GPIO输出,1为输出高,0位输出低:
- GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_9, 1);
复制代码获取GPIO输入电平:
- WifiIotGpioValue Key_Status = WIFI_IOT_GPIO_VALUE1;
- GpioGetInputVal(WIFI_IOT_IO_NAME_GPIO_5, &Key_Status);
复制代码其中:Key_Status
就是获取的电平值,GpioGetInputVal()的返回值表示获取是否成功的标志。
我创建了两个任务:
一个任务专门控制LED,一个任务控制Key。
上电之后,LED闪烁,频率是500ms。
按下user按键之后,LED灭
再次按下user按键,LED亮
再次按下user按键,再次闪烁
以此循环。
完整代码如下:
BUILD.gn
- static_library("myapp") {
- sources = [
- "my_main.c"
- ]
- include_dirs = [
- "//utils/native/lite/include",
- "//kernel/liteos_m/components/cmsis/2.0",
- "//base/iot_hardware/interfaces/kits/wifiiot_lite",
- "//vender/hisi/hi3861/hi3861/include"
- ]
- }
复制代码
my_main.c函数
- /*this is my first application*/
- /*2020/11/08*/
- #include <stdio.h>
- #include "ohos_init.h"
- #include "ohos_types.h"
- #include <stdio.h>
- #include <unistd.h>
- #include "ohos_init.h"
- #include "cmsis_os2.h"
- #include "wifiiot_gpio.h"
- #include "wifiiot_gpio_ex.h"
- #include "wifiiot_adc.h"
- #include <hi_types_base.h>
- #include <hi_i2c.h>
- #include <hi_early_debug.h>
- #include <hi_stdlib.h>
- #define LED_INTERVAL_TIME_US 500000 /*500ms*/
- #define LED_TASK_STACK_SIZE 512
- #define LED_TASK_PRIO 25
- #define KEY_INTERVAL_TIME_US 10000 /*10ms*/
- #define KEY_TASK_STACK_SIZE 1024
- #define KEY_TASK_PRIO 26
- static void *LedTask(const char *arg);
- static void *KeyTask(const char *arg);
- /*LED Control*/
- enum LedState {
- LED_ON = 0,
- LED_OFF,
- LED_SPARK,
- };
- enum LedState g_ledState = LED_SPARK;
- static void *LedTask(const char *arg)
- {
- (void)arg;
-
- while (1) {
- switch (g_ledState) {
- case LED_ON:
- GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_9, 1);
- usleep(LED_INTERVAL_TIME_US);
- break;
- case LED_OFF:
- GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_9, 0);
- usleep(LED_INTERVAL_TIME_US);
- break;
- case LED_SPARK:
- GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_9, 0);
- usleep(LED_INTERVAL_TIME_US);
- GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_9, 1);
- usleep(LED_INTERVAL_TIME_US);
- break;
- default:
- usleep(LED_INTERVAL_TIME_US);
- break;
- }
- }
- return NULL;
- }
- static void Led0Entry(void)
- {
- osThreadAttr_t attr;
- GpioInit();
- IoSetFunc(WIFI_IOT_IO_NAME_GPIO_9, WIFI_IOT_IO_FUNC_GPIO_9_GPIO);
- GpioSetDir(WIFI_IOT_IO_NAME_GPIO_9, WIFI_IOT_GPIO_DIR_OUT);
- attr.name = "LedTask";
- attr.attr_bits = 0U;
- attr.cb_mem = NULL;
- attr.cb_size = 0U;
- attr.stack_mem = NULL;
- attr.stack_size = LED_TASK_STACK_SIZE;
- attr.priority = LED_TASK_PRIO;
- if (osThreadNew((osThreadFunc_t)LedTask, NULL, &attr) == NULL) {
- printf("[Led0Task] Falied to create LedTask!n");
- }
- }
- SYS_RUN(Led0Entry);
- /*OLED board KEY Control - vased on ADC input*/
- static void *KeyTask(const char *arg)
- {
- (void)arg;
- WifiIotGpioValue Key_Status = WIFI_IOT_GPIO_VALUE1;
- WifiIotGpioValue Last_key_Status = WIFI_IOT_GPIO_VALUE1;
- uint8_t Key_press_cnt = 0u;
- while (1) {
- GpioGetInputVal(WIFI_IOT_IO_NAME_GPIO_5, &Key_Status);
- // printf("%dn", Key_Status);
- if((Key_Status == WIFI_IOT_GPIO_VALUE0) && (Last_key_Status != Key_Status))
- {
- // Key_press_cnt = (Key_press_cnt>2) ? 0:(++Key_press_cnt);
- if(Key_press_cnt >= 2)
- {
- Key_press_cnt = 0;
- }
- else
- {
- Key_press_cnt ++;
- }
- switch(Key_press_cnt)
- {
- case 0:g_ledState = LED_ON;break;
- case 1:g_ledState = LED_OFF;break;
- case 2:g_ledState = LED_SPARK;break;
- }
- }
- else
- {
- }
-
- Last_key_Status = Key_Status;
- usleep(LED_INTERVAL_TIME_US);
- }
- return NULL;
- }
- static void KeyEntry(void)
- {
- osThreadAttr_t attr;
- GpioInit();
- IoSetFunc(WIFI_IOT_IO_NAME_GPIO_5, WIFI_IOT_IO_FUNC_GPIO_5_GPIO);
- GpioSetDir(WIFI_IOT_IO_NAME_GPIO_5, WIFI_IOT_GPIO_DIR_IN);
- // AdcRead();
- attr.name = "KeyTask";
- attr.attr_bits = 0U;
- attr.cb_mem = NULL;
- attr.cb_size = 0U;
- attr.stack_mem = NULL;
- attr.stack_size = KEY_TASK_STACK_SIZE;
- attr.priority = KEY_TASK_PRIO;
- if (osThreadNew((osThreadFunc_t)KeyTask, NULL, &attr) == NULL) {
- printf("[KeyTask] Falied to create KeyTask!n");
- }
- }
- SYS_RUN(KeyEntry);
复制代码
我的软件目录如下:
最后效果图见视频。