前言
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DSP18B20驱动文件
头文件
#ifndef F1XX_TEMPLATE_MODULE_DS18B20_H
#define F1XX_TEMPLATE_MODULE_DS18B20_H#include "sys_core.h"
typedef struct {void (*input_mode_set)(void);void (*out_mode_set)(void);void (*send_data)(uint32_t status);uint32_t (*read_data)(void);void (*us_delay)(uint32_t us);
} DS18B20_conf_t;void DS18B20_conf_set(DS18B20_conf_t *cnf);bool DS18B20_Driver_Init(void);void DS18B20_readId(uint8_t *ds18b20_id);float DS18B20_GetTemp_SkipRom(void);float DS18B20_GetTemp_MatchRom(const uint8_t *ds18b20_id);#endif
源文件
#include "ds18b20/module-ds18b20.h"#define DBG_ENABLE
#define DBG_SECTION_NAME "ds18b20"
#define DBG_LEVEL DBG_LOG #include "sys_dbg.h"static DS18B20_conf_t *conf_ptr = NULL;
#define DS18B20_DQ_0 conf_ptr->send_data(0)
#define DS18B20_DQ_1 conf_ptr->send_data(1)static void DS18B20_WriteByte(uint8_t dat);static uint8_t DS18B20_ReadByte(void);static bool DS18B20_Presence(void);void DS18B20_conf_set(DS18B20_conf_t *cnf) {conf_ptr = cnf;}static void DS18B20_Rst(void) {conf_ptr->out_mode_set();DS18B20_DQ_0;conf_ptr->us_delay(750);DS18B20_DQ_1;conf_ptr->us_delay(15);
}
bool DS18B20_Driver_Init(void) {if (conf_ptr == NULL) return false;conf_ptr->out_mode_set();DS18B20_DQ_1;DS18B20_Rst();return DS18B20_Presence();
}
void DS18B20_readId(uint8_t *ds18b20_id) {if (conf_ptr == NULL) return;uint8_t uc;DS18B20_WriteByte(0x33); for (uc = 0; uc < 8; uc++)ds18b20_id[uc] = DS18B20_ReadByte();
}
float DS18B20_GetTemp_SkipRom(void) {uint8_t tpmsb = 0, tplsb = 0;short s_tem = 0;float f_tem = 0;DS18B20_Rst();DS18B20_Presence();DS18B20_WriteByte(0XCC);DS18B20_WriteByte(0X44); DS18B20_Rst();DS18B20_Presence();DS18B20_WriteByte(0XCC); DS18B20_WriteByte(0XBE); tplsb = DS18B20_ReadByte();tpmsb = DS18B20_ReadByte();s_tem = tpmsb << 8;s_tem = s_tem | tplsb;if (s_tem < 0) f_tem = (~s_tem + 1) * 0.0625;elsef_tem = s_tem * 0.0625;return f_tem;
}float DS18B20_GetTemp_MatchRom(const uint8_t *ds18b20_id) {uint8_t tpmsb, tplsb, i;short s_tem;float f_tem;DS18B20_Rst();DS18B20_Presence();DS18B20_WriteByte(0X55);DS18B20_Rst();DS18B20_Presence();DS18B20_WriteByte(0X55); for (i = 0; i < 8; i++)DS18B20_WriteByte(ds18b20_id[i]);DS18B20_WriteByte(0X44); DS18B20_Rst();DS18B20_Presence();DS18B20_WriteByte(0X55);for (i = 0; i < 8; i++)DS18B20_WriteByte(ds18b20_id[i]);DS18B20_WriteByte(0XBE); tplsb = DS18B20_ReadByte();tpmsb = DS18B20_ReadByte();s_tem = tpmsb << 8;s_tem = s_tem | tplsb;if (s_tem < 0) f_tem = (~s_tem + 1) * 0.0625;elsef_tem = s_tem * 0.0625;return f_tem;}static void DS18B20_WriteByte(uint8_t dat) {uint8_t i, testb;conf_ptr->out_mode_set();for (i = 0; i < 8; i++) {testb = dat & 0x01;dat = dat >> 1;if (testb) {DS18B20_DQ_0;conf_ptr->us_delay(8);DS18B20_DQ_1;conf_ptr->us_delay(58);} else {DS18B20_DQ_0;conf_ptr->us_delay(70);DS18B20_DQ_1;conf_ptr->us_delay(2);}}
}
static uint8_t DS18B20_ReadBit(void) {uint8_t dat;conf_ptr->out_mode_set();DS18B20_DQ_0;conf_ptr->us_delay(10);conf_ptr->input_mode_set();if (conf_ptr->read_data() == 1)dat = 1;elsedat = 0;conf_ptr->us_delay(45);return dat;
}
static uint8_t DS18B20_ReadByte(void) {uint8_t i, j, dat = 0;for (i = 0; i < 8; i++) {j = DS18B20_ReadBit();dat = (dat) | (j << i);}return dat;
}static bool DS18B20_Presence(void) {uint8_t pulse_time = 0;conf_ptr->input_mode_set();while (conf_ptr->read_data() && pulse_time < 100) {pulse_time++;conf_ptr->us_delay(1);}if (pulse_time >= 100)return 1;elsepulse_time = 0;while (!conf_ptr->read_data() && pulse_time < 240) {pulse_time++;conf_ptr->us_delay(1);}if (pulse_time >= 240)return false;elsereturn true;
}
测试配置
#include "app_conf.h"#define APP_CONF_ENABLE_DS18B20 (1)
#if APP_CONF_ENABLE_DS18B20#include "ds18b20/module-ds18b20.h"#define DBG_ENABLE
#define DBG_SECTION_NAME "DS18B20"
#define DBG_LEVEL DBG_LOG #include "sys_dbg.h"
static DS18B20_conf_t ds18b20_conf;
static stm_pin_define_t *ds18b20_pin_ptr = NULL;static void out_mode_set(void) { stm32_pin_define_mode_set(ds18b20_pin_ptr, pin_mode_output); }static void input_mode_set(void) { stm32_pin_define_mode_set(ds18b20_pin_ptr, pin_mode_input); }static void send_data(uint32_t status) { stm32_pin_define_set(ds18b20_pin_ptr, status); }static uint32_t read_data(void) { return stm32_pin_define_read(ds18b20_pin_ptr); }
static void DS18B20_pre_init() {ds18b20_pin_ptr = stm_get_pin(PE6);ds18b20_conf.us_delay = bsp_us_delay_nop;ds18b20_conf.out_mode_set = out_mode_set;ds18b20_conf.input_mode_set = input_mode_set;ds18b20_conf.send_data = send_data;ds18b20_conf.read_data = read_data;DS18B20_conf_set(&ds18b20_conf);
}sys_pre_init_export(DS18B20, DS18B20_pre_init);
static void DS18B20_init() {while (!DS18B20_Driver_Init()) {};LOG_D("DS18B20_Driver_Init ok");}sys_init_export(DS18B20, DS18B20_init);
static void DS18B20_after_init() {uint8_t uc, ucDs18b20Id[8];DS18B20_readId(ucDs18b20Id); os_ps("DS18B20_readId:");for (int i = 0; i < 8; ++i) {os_ps("%X", ucDs18b20Id[i]);}os_ps("\r\n");while (true) {float temp = DS18B20_GetTemp_MatchRom(ucDs18b20Id);LOG_D("TEMP is %0.3f", temp);HAL_Delay(1000);}
}sys_after_init_export(DS18B20, DS18B20_after_init);#endif
结果