[GD32L233C] + 7.在RTthread下使用ds18b20温度传感器

chrisrh 发表于 2022-3-7 12:55

本帖最后由 chrisrh 于 2022-3-7 12:55 编辑

在RTT_Nano的基础上，增加对ds18b20传感器的读取：

①首先在头文件中进行宏定义，这里选用的是PB8口

<pre>
<code class="language-cpp">#define DS18B20_CLK RCU_GPIOB
#define DS18B20_COM_GPIO_PORT GPIOB
#define DS18B20_COM_GPIO_PIN GPIO_PIN_8
#define DS18B20_IO_IN {GPIO_CTL(GPIOB)&=0xFFFFFFF3;GPIO_CTL(GPIOB)|=0<<8;}
#define DS18B20_IO_OUT {GPIO_CTL(GPIOB)&=0xFFFFFFF3;GPIO_CTL(GPIOB)|=1<<8;}
#define DS18B20_Pin_ongpio_bit_set(DS18B20_COM_GPIO_PORT, DS18B20_COM_GPIO_PIN)//GPIO_BOP(DS18B20_COM_GPIO_PORT) = DS18B20_COM_GPIO_PIN;
#define DS18B20_Pin_offgpio_bit_reset(DS18B20_COM_GPIO_PORT, DS18B20_COM_GPIO_PIN)//GPIO_BC(DS18B20_COM_GPIO_PORT) = DS18B20_COM_GPIO_PIN;
#define DS18B20_get gpio_input_bit_get(DS18B20_COM_GPIO_PORT, DS18B20_COM_GPIO_PIN)
void DS18B20_config_init();</code></pre>

②对IO进行初始化

<pre>
<code class="language-cpp">/*!
\brief configure DS18B20_Pin
*/
void DS18B20_config_init()
{
/* enable the DS18B20 clock */
rcu_periph_clock_enable(DS18B20_CLK);
/* configure DS18B20 GPIO port */
gpio_mode_set(DS18B20_COM_GPIO_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, DS18B20_COM_GPIO_PIN);
gpio_output_options_set(DS18B20_COM_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, DS18B20_COM_GPIO_PIN);
gpio_bit_set(DS18B20_COM_GPIO_PORT, DS18B20_COM_GPIO_PIN);//GPIO_BC(DS18B20_COM_GPIO_PORT) = DS18B20_COM_GPIO_PIN;
}</code></pre>

③使用了rtthread传感器中关于ds18b20相关的文件，头文件sensor_dallas_ds18b20.h如下：

<pre>
<code class="language-cpp">#ifndef __DS18B20_H__
#define __DS18B20_H__

#include <rthw.h>
#include <rtthread.h>
#include "gd32l23x.h"
#include "gd32l233c_start.h"

#define CONNECT_SUCCESS0
#define CONNECT_FAILED 1

struct ds18b20_device
{
rt_base_t pin;
rt_mutex_t lock;
};
typedef struct ds18b20_device *ds18b20_device_t;

void ds18b20_reset(void);
uint8_t ds18b20_connect(void);
uint8_t ds18b20_read_bit(void);
uint8_t ds18b20_read_byte(void);
void ds18b20_write_byte(uint8_t dat);
void ds18b20_start(void);
uint8_t ds18b20_init(void);
int32_t ds18b20_get_temperature(void);

#endif /* __DS18B20_H_ */</code></pre>

④使用了rtthread传感器中关于ds18b20相关的文件，驱动函数sensor_dallas_ds18b20.c如下：

<pre>
<code class="language-cpp">
#include "sensor_dallas_ds18b20.h"
#include <rtthread.h>
#include "gd32l23x.h"
#include "gd32l233c_start.h"
#include <rtdbg.h>
#include "systick.h"

#define DBG_TAG "sensor.dallas.ds18b20"
#define DBG_LVL DBG_INFO

#define SENSOR_TEMP_RANGE_MAX (125)
#define SENSOR_TEMP_RANGE_MIN (-55)

void ds18b20_reset(void)
{
DS18B20_IO_OUT;
DS18B20_Pin_off;
delay_1us(780); /* 480us - 960us */
DS18B20_Pin_on;
delay_1us(40); /* 15us - 60us*/
}

uint8_t ds18b20_connect(void)
{
uint8_t retry = 0;
DS18B20_IO_IN;

while (DS18B20_get && retry < 200)
{
 retry++;
 delay_1us(1);
};

if(retry >= 200)
 return CONNECT_FAILED;
else
 retry = 0;

while (!DS18B20_get && retry < 240)
{
 retry++;
 delay_1us(1);
};

if(retry >= 240)
 return CONNECT_FAILED;

return CONNECT_SUCCESS;
}

uint8_t ds18b20_read_bit(void)
{
uint8_t data;

DS18B20_IO_OUT;
DS18B20_Pin_off;
delay_1us(2);
DS18B20_Pin_on;
DS18B20_IO_IN;
/* maybe 12us, maybe 5us, whatever...I have no idea */
delay_1us(5);

if(DS18B20_get)
 data = 1;
else
 data = 0;

delay_1us(50);

return data;
}

uint8_t ds18b20_read_byte(void)
{
uint8_t i, j, dat;
dat = 0;

for (i = 1; i <= 8; i++)
{
 j = ds18b20_read_bit();
 dat = (j << 7) | (dat >> 1);
}

return dat;
}

void ds18b20_write_byte(uint8_t dat)
{
uint8_t j;
uint8_t testb;
DS18B20_IO_OUT;

for (j = 1; j <= 8; j++)
{
 testb = dat & 0x01;
 dat = dat >> 1;

 if(testb)
 {
 DS18B20_Pin_off;
 delay_1us(2);
 DS18B20_Pin_on;
 delay_1us(60);
 }
 else
 {
 DS18B20_Pin_off;
 delay_1us(60);
 DS18B20_Pin_on;
 delay_1us(2);
 }
}
}

void ds18b20_start(void)
{
ds18b20_reset();
ds18b20_connect();
ds18b20_write_byte(0xcc);/* skip rom */
ds18b20_write_byte(0x44);/* convert */
}

uint8_t ds18b20_init(void)
{
uint8_t ret = 0;

ds18b20_reset();
ret = ds18b20_connect();

return ret;
}

int32_t ds18b20_get_temperature()
{
uint8_t TL, TH;
int32_t tem;

ds18b20_start();
ds18b20_init();
ds18b20_write_byte(0xcc);
ds18b20_write_byte(0xbe);
TL = ds18b20_read_byte(); /* LSB first */
TH = ds18b20_read_byte();
if (TH > 7)
{
 TH =~ TH;
 TL =~ TL;
 tem = TH;
 tem <<= 8;
 tem += TL;
 tem = (int32_t)(tem * 0.0625 * 10 + 0.5);
 return -tem;
}
else
{
 tem = TH;
 tem <<= 8;
 tem += TL;
 tem = (int32_t)(tem * 0.0625 * 10 + 0.5);
 return tem;
}
}
</code></pre>

⑤在main.c中定义线程和入口函数：

<pre>
<code class="language-cpp">#include "gd32l23x.h"
#include "systick.h"
#include "rtthread.h"
#include "gd32l233c_start.h"
#include "stdio.h"
#include "sensor_dallas_ds18b20.h"

rt_thread_t temp_thread = RT_NULL;
static void temp_thread_entry(void *parameter);//temperature

int main(void)
{
temp_thread = rt_thread_create( "temp", /*线程名字*/
temp_thread_entry, /*线程入口函数*/
RT_NULL, /*线程入口函数参数*/
256, /*线程栈大小*/
6 , /*线程优先级*/
20); /*线程时间片*/
}

static void temp_thread_entry(void *parameter)
{ int temp;
while(1)
{
rt_kprintf("temp:");
temp = ds18b20_get_temperature();
printf("%d\r\n",temp);
rt_thread_delay(1000);
}
}

/* retarget the C library printf function to the USART */
int fputc(int ch, FILE *f)
{
usart_data_transmit(USART0, (uint8_t) ch ); //发送字符
while (usart_flag_get(USART0,USART_FLAG_TC) == RESET); //检查是否发送完毕
return (ch);
}</code></pre>

⑥在finsh_port.c中添加了如下函数，方便在finsh中调用：

<pre>
<code class="language-cpp">void ds18b20_get_val(void)
{
extern rt_thread_t temp_thread;
rt_thread_startup (temp_thread);
rt_kprintf("temp_thread startup\r\n");
rt_thread_delay(1000);
}
MSH_CMD_EXPORT(ds18b20_get_val, control ds18b20 thread start);//将该函数添加进入finsh，方便以后调用
</code></pre>

  

 

！！在rtthread中的一个关于us的延时函数，加入工程中即可使用us的延时

<pre>
<code class="language-cpp">void rt_hw_us_delay(uint32_t us)
{
uint32_t start,now,delta,reload,us_tick;
start = SysTick->VAL;
reload = SysTick->LOAD;
us_tick = SystemCoreClock / 1000000UL;
do{
now = SysTick->VAL;
delta = start>now?start-now:reload + start -now;
}while(delta<us_tick*us);
}</code></pre>

Jacktang 发表于 2022-3-7 21:10

中间的驱动函数sensor_dallas_ds18b20.c是官网例程么

freebsder 发表于 2022-3-7 22:27

不应该是do while(0)吗？

chrisrh 发表于 2022-3-8 08:38

Jacktang 发表于 2022-3-7 21:10
中间的驱动函数sensor_dallas_ds18b20.c是官网例程么

嗯，是的！

chrisrh 发表于 2022-3-8 08:39

freebsder 发表于 2022-3-7 22:27
不应该是do while(0)吗？

嗯嗯，程序还有许多别的问题，<img height="28" src="https://bbs.eeworld.com.cn/static/editor/plugins/hkemoji/sticker/facebook/face-with-finger-covering-closed-lips_1f92b.png" width="28" />

wangerxian 发表于 2022-3-8 17:12

RTThread就是好，这些常用的都直接有库了。想给公司也搞一个驱动库，可以直接用的那种~

chrisrh 发表于 2022-3-8 17:25

wangerxian 发表于 2022-3-8 17:12
RTThread就是好，这些常用的都直接有库了。想给公司也搞一个驱动库，可以直接用的那种~

<pre>
<code class="language-cpp">/* Sensor types */

#define RT_SENSOR_CLASS_NONE (0)
#define RT_SENSOR_CLASS_ACCE (1)/* Accelerometer */
#define RT_SENSOR_CLASS_GYRO (2)/* Gyroscope */
#define RT_SENSOR_CLASS_MAG (3)/* Magnetometer */
#define RT_SENSOR_CLASS_TEMP (4)/* Temperature */
#define RT_SENSOR_CLASS_HUMI (5)/* Relative Humidity */
#define RT_SENSOR_CLASS_BARO (6)/* Barometer */
#define RT_SENSOR_CLASS_LIGHT (7)/* Ambient light */
#define RT_SENSOR_CLASS_PROXIMITY (8)/* Proximity */
#define RT_SENSOR_CLASS_HR (9)/* Heart Rate */
#define RT_SENSOR_CLASS_TVOC (10) /* TVOC Level */
#define RT_SENSOR_CLASS_NOISE (11) /* Noise Loudness */
#define RT_SENSOR_CLASS_STEP (12) /* Step sensor */
#define RT_SENSOR_CLASS_FORCE (13) /* Force sensor */

/* Sensor vendor types */

#define RT_SENSOR_VENDOR_UNKNOWN (0)
#define RT_SENSOR_VENDOR_STM (1)/* STMicroelectronics */
#define RT_SENSOR_VENDOR_BOSCH (2)/* Bosch */
#define RT_SENSOR_VENDOR_INVENSENSE (3)/* Invensense */
#define RT_SENSOR_VENDOR_SEMTECH (4)/* Semtech */
#define RT_SENSOR_VENDOR_GOERTEK (5)/* Goertek */
#define RT_SENSOR_VENDOR_MIRAMEMS (6)/* MiraMEMS */
#define RT_SENSOR_VENDOR_DALLAS (7)/* Dallas */

/* Sensor unit types */

#defineRT_SENSOR_UNIT_NONE (0)
#defineRT_SENSOR_UNIT_MG (1)/* Accelerometer unit: mG */
#defineRT_SENSOR_UNIT_MDPS (2)/* Gyroscope unit: mdps */
#defineRT_SENSOR_UNIT_MGAUSS (3)/* Magnetometer unit: mGauss */
#defineRT_SENSOR_UNIT_LUX (4)/* Ambient light unit: lux */
#defineRT_SENSOR_UNIT_CM (5)/* Distance unit: cm */
#defineRT_SENSOR_UNIT_PA (6)/* Barometer unit: pa */
#defineRT_SENSOR_UNIT_PERMILLAGE (7)/* Relative Humidity unit: permillage */
#defineRT_SENSOR_UNIT_DCELSIUS (8)/* Temperature unit: dCelsius */
#defineRT_SENSOR_UNIT_HZ (9)/* Frequency unit: HZ */
#defineRT_SENSOR_UNIT_ONE (10) /* Dimensionless quantityunit: 1 */
#defineRT_SENSOR_UNIT_BPM (11) /* Heart rate unit: bpm */
#defineRT_SENSOR_UNIT_MM (12) /* Distance unit: mm */
#defineRT_SENSOR_UNIT_MN (13) /* Force unit: mN */

/* Sensor communication interface types */

#defineRT_SENSOR_INTF_I2C (1 << 0)
#defineRT_SENSOR_INTF_SPI (1 << 1)
#defineRT_SENSOR_INTF_UART (1 << 2)
#defineRT_SENSOR_INTF_ONEWIRE (1 << 3)

/* Sensor power mode types */

#defineRT_SENSOR_POWER_NONE (0)
#defineRT_SENSOR_POWER_DOWN (1)/* power down mode */
#defineRT_SENSOR_POWER_NORMAL (2)/* normal-power mode */
#defineRT_SENSOR_POWER_LOW (3)/* low-power mode */
#defineRT_SENSOR_POWER_HIGH (4)/* high-power mode */</code></pre>

in   "sensor.h"

消化吸收，先变成自己的，再变成公司适用的，<img height="28" src="https://bbs.eeworld.com.cn/static/editor/plugins/hkemoji/sticker/facebook/face-with-rolling-eyes_1f644.png" width="28" />

一起学习RTT呀！

wangerxian 发表于 2022-3-9 09:30

chrisrh 发表于 2022-3-8 17:25
/* Sensor types */

#define RT_SENSOR_CLASS_NONE (0)
#define RT_SENSOR_CLASS_ACCE ...

得找到一种合适得接口，到时候可以封装成.lib的库用。

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[GD32L233C] + 7.在RTthread下使用ds18b20温度传感器