小熊派季E53智慧农业扩展板初体验

小熊派季E53智慧农业扩展板初体验

要求亮度低于某个阈值时开启电动机和紫外灯，高于这个阈值时关闭电动机和紫外灯。首先阅读B5样例，理解后编写代码如下：

#include <stdio.h>
#include <unistd.h>#include "cmsis_os2.h"
#include "iot_errno.h"
#include "iot_gpio.h"
#include "iot_gpio_ex.h"
#include "iot_i2c.h"
#include "ohos_init.h"#define I2C_TASK_STACK_SIZE (1024 * 8)
#define I2C_TASK_PRIO 25
#define WIFI_IOT_IO_FUNC_GPIO_0_I2C1_SDA 6
#define WIFI_IOT_IO_FUNC_GPIO_1_I2C1_SCL 6
#define WIFI_IOT_I2C_IDX 1
#define WIFI_IOT_I2C_BAUDRATE 400000
#define TASK_DELAY_1S 1000000
#define BH_1750_ADDR 0x23
#define BH_1750_STARTUP 'x10'
#define BH_1750_WR_ADDR ((BH_1750_ADDR << 1) | 0x0)
#define BH_1750_RD_ADDR ((BH_1750_ADDR << 1) | 0x1)
#define LUX_THRSHD 1000static char g_data[2];/*** @brief i2c task writes data to NFC tag**/
static void I2cTask(void)
{// GPIO_0 multiplexed to I2C1_SDAIoTGpioInit(0);IoTGpioSetFunc(0, WIFI_IOT_IO_FUNC_GPIO_0_I2C1_SDA);// GPIO_1 multiplexed to I2C1_SCLIoTGpioInit(1);IoTGpioSetFunc(1, WIFI_IOT_IO_FUNC_GPIO_1_I2C1_SCL);// baudrate: 400kbpsIoTI2cInit(WIFI_IOT_I2C_IDX, WIFI_IOT_I2C_BAUDRATE);// 初始化紫外灯 14IoTGpioInit(14);IoTGpioSetFunc(14, IOT_GPIO_FUNC_GPIO_14_GPIO);IoTGpioSetDir(14, IOT_GPIO_DIR_OUT);// 初始化电动机 8IoTGpioInit(8);IoTGpioSetFunc(8, IOT_GPIO_FUNC_GPIO_8_GPIO);IoTGpioSetDir(8, IOT_GPIO_DIR_OUT);// 初始化光敏电阻g_data[0] = BH_1750_STARTUP;IoTI2cWrite(WIFI_IOT_I2C_IDX, BH_1750_WR_ADDR, g_data, 1);while (1) {IoTI2cRead(WIFI_IOT_I2C_IDX, BH_1750_RD_ADDR, g_data, 2);unsigned short lux = *(unsigned short*)g_data;printf("lux = %hdn", lux);if (lux < LUX_THRSHD) {IoTGpioSetOutputVal(14, 1);IoTGpioSetOutputVal(8, 1);} else {IoTGpioSetOutputVal(14, 0);IoTGpioSetOutputVal(8, 0);}        usleep(TASK_DELAY_1S);}
}/*** @brief Main Entry of the I2c Example**/
static void I2cExampleEntry(void)
{osThreadAttr_t attr;attr.name = "I2cTask";attr.attr_bits = 0U;attr.cb_mem = NULL;attr.cb_size = 0U;attr.stack_mem = NULL;attr.stack_size = I2C_TASK_STACK_SIZE;attr.priority = I2C_TASK_PRIO;if (osThreadNew((osThreadFunc_t)I2cTask, NULL, &attr) == NULL) {printf("Falied to create I2cTask!n");}
}APP_FEATURE_INIT(I2cExampleEntry);