ms5611驱动代码.c

#include "main.h" stru_MS5611_DATA MS5611_DATA={ 
   0}; const uint8_t ms5611_reset_value = 0x1e; const uint8_t ms5611_prom_basic_addr = 0xa0; const uint8_t ms5611_d1_4096 = 0x48; const uint8_t ms5611_d2_4096 = 0x58; // 气压计初始化 void ms5611_init(void) { 
    rcu_periph_clock_enable(RCU_GPIOB); gpio_init(GPIOB,GPIO_MODE_OUT_PP,GPIO_OSPEED_50MHZ,M_SCLK_Pin); gpio_init(GPIOB,GPIO_MODE_OUT_PP,GPIO_OSPEED_50MHZ,M_SDI_Pin); gpio_init(GPIOB,GPIO_MODE_OUT_PP,GPIO_OSPEED_50MHZ,M_CSB_Pin); gpio_init(GPIOB,GPIO_MODE_IPU ,GPIO_OSPEED_50MHZ,M_SDO_Pin); MS5611_DISABLE; M_SCLK_H; reset_ms5611_regs(); //复位寄存器值 } //复位寄存器 void reset_ms5611_regs(void) { 
    uint8_t m_i; uint8_t reset_value = ms5611_reset_value; MS5611_ENABLE; rt_thread_mdelay(1); for(m_i = 0; m_i < 8; m_i++) { 
    M_SCLK_L; SET_M_SDI(reset_value&0x80); reset_value = reset_value<<1; M_SCLK_H; } M_SCLK_H; SET_M_SDI(0); rt_thread_mdelay(3); MS5611_DISABLE; read_ms5611_prom(); //读取传感器内部寄存器值 } //读取ms5611 寄存器校准值 void read_ms5611_prom(void) { 
    uint8_t m_i_c; uint8_t m_i; uint8_t prom_value; uint16_t prom_temp; for(m_i_c = 0; m_i_c < 8; m_i_c++) { 
    MS5611_ENABLE; rt_thread_mdelay(1); prom_value = ms5611_prom_basic_addr + m_i_c * 2; for(m_i = 0; m_i < 8; m_i++) { 
    M_SCLK_L; SET_M_SDI(prom_value&0x80); prom_value = prom_value<<1; M_SCLK_H; } M_SCLK_H; SET_M_SDI(0); for(m_i = 0; m_i < 16; m_i++) { 
    M_SCLK_L; M_SCLK_H; prom_temp = (prom_temp<<1) + READ_M_SDO; } MS5611_DATA.REG_DATA[m_i_c] = prom_temp; prom_temp = 0; rt_thread_mdelay(4); MS5611_DISABLE; rt_thread_mdelay(1); } } void ms5611_pre_start(void) { 
    uint8_t m_i; uint8_t data_temp = ms5611_d1_4096; for(m_i = 0; m_i < 8; m_i++) { 
    M_SCLK_L; SET_M_SDI(data_temp&0x80); data_temp = data_temp<<1; M_SCLK_H; } M_SCLK_H; SET_M_SDI(0); } uint32_t ms5611_pre_read(void) { 
    uint8_t m_i; uint32_t pre_temp = 0; SET_M_SDI(0); for(m_i = 0; m_i < 8; m_i++) { 
    M_SCLK_L; M_SCLK_H; } for(m_i = 0; m_i < 24; m_i++) { 
    M_SCLK_L; M_SCLK_H; pre_temp = (pre_temp<<1) + READ_M_SDO; } return pre_temp; } void ms5611_temp_start(void) { 
    uint8_t m_i; uint8_t data_temp = ms5611_d2_4096; for(m_i = 0; m_i < 8; m_i++) { 
    M_SCLK_L; SET_M_SDI(data_temp&0x80); data_temp = data_temp<<1; M_SCLK_H; } M_SCLK_H; SET_M_SDI(0); } uint32_t ms5611_temp_read(void) { 
    uint8_t m_i; uint32_t tem_temp = 0; SET_M_SDI(0); for(m_i = 0; m_i < 8; m_i++) { 
    M_SCLK_L; M_SCLK_H; } for(m_i = 0; m_i < 24; m_i++) { 
    M_SCLK_L; M_SCLK_H; tem_temp = (tem_temp<<1) + READ_M_SDO; } return tem_temp; } 

ms5611驱动代码.h

讯享网#ifndef _MS5611_H_ #define _MS5611_H_ #include "main.h" #define M_CSB_Pin GPIO_PIN_12 #define M_CSB_GPIO_Port GPIOB #define M_SCLK_Pin GPIO_PIN_13 #define M_SCLK_GPIO_Port GPIOB #define M_SDO_Pin GPIO_PIN_14 #define M_SDO_GPIO_Port GPIOB #define M_SDI_Pin GPIO_PIN_15 #define M_SDI_GPIO_Port GPIOB #define MS5611_ENABLE gpio_bit_reset(GPIOB, M_CSB_Pin); #define MS5611_DISABLE gpio_bit_set(GPIOB, M_CSB_Pin); #define M_SCLK_H gpio_bit_set(GPIOB, M_SCLK_Pin); delay_us(1) #define M_SCLK_L gpio_bit_reset(GPIOB, M_SCLK_Pin); delay_us(1) #define READ_M_SDO gpio_input_bit_get(GPIOB, M_SDO_Pin) #define SET_M_SDI(x) gpio_bit_write(GPIOB, M_SDI_Pin, x); #define Max_P_Num 20 typedef struct { 
    uint32_t d1; //气压值裸数据 uint32_t d2; //温度值裸数据 uint16_t REG_DATA[6];//C1~C6 int32_t dT; int32_t TEMP;//P压强最终结果 int64_t OFF; int64_t SENS; float P; //计算得出大气压强 }stru_MS5611_DATA; extern stru_MS5611_DATA MS5611_DATA; void ms5611_init(void); void reset_ms5611_regs(void); void get_prom_data(uint16_t * prom_addr); void ms5611_pre_start(void); uint32_t ms5611_pre_read(void); void ms5611_temp_start(void); uint32_t ms5611_temp_read(void); void read_ms5611_prom(void); #endif //_MS5611_H_ 

测试函数

#include "main.h" //气压计初始化 ms5611_init(); delay_ms(200); while(1) { 
    //读取压力裸数据 MS5611_ENABLE; delay_ms(5); ms5611_pre_start(); delay_ms(11); MS5611_DISABLE; delay_ms(5); MS5611_ENABLE; delay_ms(5); MS5611_DATA.d1 = ms5611_pre_read(); MS5611_DISABLE; delay_ms(170); //读取温度裸数据 MS5611_ENABLE; delay_ms(5); ms5611_temp_start(); delay_ms(11); MS5611_DISABLE; delay_ms(5); MS5611_ENABLE; delay_ms(5); MS5611_DATA.d2 = ms5611_temp_read(); MS5611_DISABLE; //数据校准 //获取温度 MS5611_DATA.dT = (int32_t)MS5611_DATA.d2 - (uint32_t)MS5611_DATA.REG_DATA[5]*256; MS5611_DATA.TEMP = 2000 + MS5611_DATA.dT*(uint32_t)MS5611_DATA.REG_DATA[6]/; //获取压强 MS5611_DATA.OFF = (int64_t)MS5611_DATA.REG_DATA[2]*65535 + ((int64_t)MS5611_DATA.dT*MS5611_DATA.REG_DATA[4])/128; MS5611_DATA.SENS = (int64_t)MS5611_DATA.REG_DATA[1]*32768 + ((int64_t)MS5611_DATA.dT*MS5611_DATA.REG_DATA[3])/256; MS5611_DATA.P = (MS5611_DATA.SENS*MS5611_DATA.d1/ - MS5611_DATA.OFF)/32768;//显示压强 delay_ms(200); }