[第二期空气质量分析仪]第1周作业

发布于 2019-08-28 00:14:39 浏览：1364 订阅该版

* 本帖最后由 CCXX 于 2019-8-28 00:20 编辑 *

本实验基于正点原子的潘多拉STM32L475VET6

第一周学习进展：

任务一：BSP跑起来
由于本人强迫症十分严重，没有适应习惯官方的这种工程结构，于是先把scons研究了一下，把工程目录和结构改了。中间遇到L4的第一块RAM问题死机卡了我一整天，后来发现是HEAP_BEGIN指错位置了，解决此问题后就比较顺利了，任务一轻松通过。

![1.png](/uploads/201908/28/001215jz8mzht7ni0z79i9.png)
![2.png](/uploads/201908/28/001215iofyuico6wcvyglg.png)
任务二：报警模块
任务三：按键模块
这两个任务比较简单，写了drv_led和drv_key的文件，仔细看看RT-Thread文档中心的PIN设备使用示例就可以掌握这部分。使用这个设备模型确实很容就能实现功能，但是我相信简单肯定有牺牲，以前一直使用寄存器开发，不知这个设备模型的效率如何，后面空闲了再做个对比试验。
drv_led.h
#ifndef DRV_LED_H
#define DRV_LED_H

#include "Common.h"

#define LED_R_PIN_NUM       38
#define LED_G_PIN_NUM       39
#define LED_B_PIN_NUM       40

void led_init(void);
void led_on(void);
void led_off(void);
void led_blink(void);
void led_status(uint16_t LED_Status);

#endif

drv_led.c
#include "drv_led.h"

void led_init(void)
{
    rt_pin_mode(LED_R_PIN_NUM, PIN_MODE_OUTPUT);
    rt_pin_mode(LED_G_PIN_NUM, PIN_MODE_OUTPUT);
    rt_pin_mode(LED_B_PIN_NUM, PIN_MODE_OUTPUT);
    rt_pin_write(LED_R_PIN_NUM, PIN_HIGH);
    rt_pin_write(LED_G_PIN_NUM, PIN_HIGH);
    rt_pin_write(LED_B_PIN_NUM, PIN_HIGH);
}

void led_on(void)
{
    rt_pin_write(LED_R_PIN_NUM, PIN_LOW);
    rt_pin_write(LED_G_PIN_NUM, PIN_LOW);
    rt_pin_write(LED_B_PIN_NUM, PIN_LOW);
}
MSH_CMD_EXPORT(led_on, LED ON);

void led_off(void)
{
    rt_pin_write(LED_R_PIN_NUM, PIN_HIGH);
    rt_pin_write(LED_G_PIN_NUM, PIN_HIGH);
    rt_pin_write(LED_B_PIN_NUM, PIN_HIGH);
}
MSH_CMD_EXPORT(led_off, LED OFF);

void led_blink(void)
{
    rt_pin_write(LED_R_PIN_NUM, PIN_LOW);
    rt_pin_write(LED_G_PIN_NUM, PIN_LOW);
    rt_pin_write(LED_B_PIN_NUM, PIN_LOW);
    rt_thread_delay(250);
    rt_pin_write(LED_R_PIN_NUM, PIN_HIGH);
    rt_pin_write(LED_G_PIN_NUM, PIN_HIGH);
    rt_pin_write(LED_B_PIN_NUM, PIN_HIGH);
    rt_thread_delay(250);
}
MSH_CMD_EXPORT(led_blink, LED Blink);

void led_status(uint16_t LED_Status)
{
 (LED_Status & (1 << 0)) ? rt_pin_write(LED_R_PIN_NUM, PIN_LOW) : rt_pin_write(LED_R_PIN_NUM, PIN_HIGH);
 (LED_Status & (1 << 1)) ? rt_pin_write(LED_G_PIN_NUM, PIN_LOW) : rt_pin_write(LED_G_PIN_NUM, PIN_HIGH);
 (LED_Status & (1 << 2)) ? rt_pin_write(LED_B_PIN_NUM, PIN_LOW) : rt_pin_write(LED_B_PIN_NUM, PIN_HIGH);
}

void led_set_status(int argc, char **argv)
{
    unsigned char num = 0;
    unsigned char status = 0;

if (argc < 3)
 {
 rt_kprintf("Please input 'led_set_status number status ");
 return;
 }

num = atoi(argv[1]);
 if ((num < 1) || (num > 3))
 {
 rt_kprintf("number : 1~3 ");
 return;
 }
 num -= 1;

status = atoi(argv[2]);
 if (status == 0)
 {
 g_LEDStatus &= ~(1 << num);
 }
 else if (status == 1)
 {
 g_LEDStatus |= 1 << num;
 }
 else
 {
 rt_kprintf("status : 0 or 1 ");
 return;
 }

led_status(g_LEDStatus);
}
MSH_CMD_EXPORT(led_set_status, Set LED status | parameter : number(1~3) status(0/1));

drv_key.h
#ifndef DRV_KEY_H
#define DRV_KEY_H

#include "Common.h"

#define KEY0_PIN_NUM        57
#define KEY1_PIN_NUM        56
#define KEY2_PIN_NUM        55
#define KEYUP_PIN_NUM       7

void key_sample(void);
void key_isr(void *args);

#endif

drv_key.c
#include "drv_key.h"

void key_sample(void)
{
    rt_pin_mode(KEY0_PIN_NUM  , PIN_MODE_INPUT);
    rt_pin_irq_enable(KEY0_PIN_NUM, PIN_IRQ_ENABLE);
    rt_pin_attach_irq(KEY0_PIN_NUM, PIN_IRQ_MODE_FALLING, key_isr, RT_NULL);

rt_pin_mode(KEY1_PIN_NUM  , PIN_MODE_INPUT);
    rt_pin_irq_enable(KEY1_PIN_NUM, PIN_IRQ_ENABLE);
    rt_pin_attach_irq(KEY1_PIN_NUM, PIN_IRQ_MODE_FALLING, key_isr, RT_NULL);

rt_pin_mode(KEY2_PIN_NUM  , PIN_MODE_INPUT);
    rt_pin_irq_enable(KEY2_PIN_NUM, PIN_IRQ_ENABLE);
    rt_pin_attach_irq(KEY2_PIN_NUM, PIN_IRQ_MODE_FALLING, key_isr, RT_NULL);

rt_pin_mode(KEYUP_PIN_NUM , PIN_MODE_INPUT);
    rt_pin_irq_enable(KEYUP_PIN_NUM, PIN_IRQ_ENABLE);
    rt_pin_attach_irq(KEYUP_PIN_NUM, PIN_IRQ_MODE_RISING, key_isr, RT_NULL);
}
MSH_CMD_EXPORT(key_sample, key_sample);

void key_isr(void *args)
{
 if (rt_pin_read(KEY0_PIN_NUM) == PIN_LOW)
 {
 rt_thread_mdelay(100);
 if (rt_pin_read(KEY0_PIN_NUM) == PIN_LOW)
 {
 rt_kprintf("KEY0 pressed! ");
 led_on();
 }
 }
 else
 if (rt_pin_read(KEY1_PIN_NUM) == PIN_LOW)
 {
 rt_thread_mdelay(100);
 if (rt_pin_read(KEY1_PIN_NUM) == PIN_LOW)
 {
 rt_kprintf("KEY1 pressed! ");
 led_off();
 }
 }
 else
 if (rt_pin_read(KEY2_PIN_NUM) == PIN_LOW)
 {
 rt_thread_mdelay(100);
 if (rt_pin_read(KEY2_PIN_NUM) == PIN_LOW)
 {
 rt_kprintf("KEY2 pressed! ");
 led_blink();
 }
 }
 else
 if (rt_pin_read(KEYUP_PIN_NUM) == PIN_HIGH)
 {
 rt_thread_mdelay(100);
 if (rt_pin_read(KEYUP_PIN_NUM) == PIN_HIGH)
 {
 rt_kprintf("KEYUP pressed! ");
 led_blink();
 }
 }
}

任务四：温湿度传感器驱动

温湿度传感器型号是AHT10，暂时没有兴趣去仔细研究这个东西，这部分的驱动直接把原子的拿过来用了。

整体实验运行结果：
![3.png](/uploads/201908/28/001236nnnb4swqrswcqrsc.png)

另外吐槽一下，RT-Thread里面所有printf函数输出都是 ，在某些串口软件里面它就只是换行，没有回车，后面我全部改成了 。