基于GR551x芯片的硬件IIC驱动QMA7981

实现的函数
- qma7981_init();
- int16_t get_accel_x()
- int16_t get_accel_y()
- int16_t get_accel_z()
- sensor_interrupt_enter();
QMA7981.H文件
QMA7981.C文件

移植完成最基本的初始化配置和中断唤醒配置，以及原始数据读取。其他配置需要根据数据手册实现。
参考驱动的源码是基于Arduino来源是： [1]: 参考工程。
硬件连接如下：

实现的函数

qma7981_init();

void qma7981_init()
{sys_delay_ms(10);soft_reset();                           //soft reset all of the registerssys_delay_ms(10); set_mode(MODE_ACTIVE);                  //bring out of sleep modeset_clock_freq(CLK_200_KHZ);            //set digital clock freqset_bandwidth(MCLK_DIV_BY_975);         //set bandwitch (samples per sec)set_full_scale_range(RANGE_16G);        //set full scale acceleration range
}

int16_t get_accel_x()

int16_t get_accel_x(void)
{return read_accel_axis(0x01);
}

int16_t get_accel_y()

int16_t get_accel_y(void)
{return read_accel_axis(0x03);
}

int16_t get_accel_z()

int16_t get_accel_z(void)
{return read_accel_axis(0x05);
}

sensor_interrupt_enter();

void  sensor_interrupt_enter (void) //传感器的中断唤醒配置
{// set bandwidth (samples per sec)// = CLK / DIV_BY = 50k / 975 = 50 samples / secset_clock_freq(CLK_5_KHZ);              //set digital clock freqset_bandwidth(MCLK_DIV_BY_975);         // set bandwitch (samples per sec)set_interrupt_pin_1_type(false, false); // set interrupt pin type and logic levelwrite_byte (0x18, 0x07);                //选择中断轴write_byte (0x1a, 0x01);                //设置中断脚输出；write_byte (0x2c, 0xF0);                //设置中断采样计算个数write_byte (0x2e, 0x40);                //设置中断阀值}

QMA7981.H文件

基本的宏定义参数

#define ADO                     0        // I2C Address pin, 0 for low and 1 for high
#define QMA7981_ADDRESS_LEN     1
#if ADO == 1
#define I2C_ADDRESS  0x13                //0b0010011 Device address when ADO = 1
#else
#define I2C_ADDRESS  0x12                //0b0010010 Device address when ADO = 0
#endif/*qma7981 full scale range*/
#define RANGE_2G                  0x01
#define RANGE_4G                  0x02
#define RANGE_8G                  0x04
#define RANGE_16G                 0x08
#define RANGE_32G                 0x0F
/*qma7981 bandwidth*/
#define MCLK_DIV_BY_7695          0x00
#define MCLK_DIV_BY_3855          0x01
#define MCLK_DIV_BY_1935          0x02
#define MCLK_DIV_BY_975           0x03
#define MCLK_DIV_BY_15375         0x05
#define MCLK_DIV_BY_30735         0x06
#define MCLK_DIV_BY_61455         0x07
/*qma7981 clock freq*/
#define CLK_500_KHZ               0x01
#define CLK_333_KHZ               0x00
#define CLK_200_KHZ               0x02
#define CLK_100_KHZ               0x03
#define CLK_50_KHZ                0x04
#define CLK_25_KHZ                0x05
#define CLK_12_KHZ_5              0x06
#define CLK_5_KHZ                 0x07
/*qma7981 no motion duration*/
#define NO_MOTION_1_SEC           0x00
#define NO_MOTION_2_SEC           0x01
#define NO_MOTION_3_SEC           0x02
#define NO_MOTION_5_SEC           0x04
#define NO_MOTION_10_SEC          0x09
#define NO_MOTION_15_SEC          0x0E
#define NO_MOTION_30_SEC          0x12
#define NO_MOTION_1_MIN           0x18
#define NO_MOTION_2_MIN           0x22
#define NO_MOTION_3_MIN           0x28
#define NO_MOTION_4_MIN           0x2E  /*qma7981 any motion samples*/
#define NUM_SAMPLES_1             0x00
#define NUM_SAMPLES_2             0x01
#define NUM_SAMPLES_3             0x02
#define NUM_SAMPLES_4             0x03
/*qma7981 mode*/
#define MODE_STANDBY              0x00
#define MODE_ACTIVE               0x01
/*qma7981 motion_detect*/
#define MOTION_DETECT_NOTHING     0x00
#define MOTION_DETECT_ANY_MOTION  0x01
#define MOTION_DETECT_NO_MOTION   0x02

QMA7981.C文件

基本的必须函数


static void register_read(uint8_t addr,uint8_t register_address, uint8_t number_of_bytes, uint8_t * destination)
{uint8_t wdata[1] = {0};wdata[0] = register_address;hal_i2c_master_transmit(&g_i2c_handle, addr, wdata, 1, 5000);hal_i2c_master_receive(&g_i2c_handle, addr, destination, number_of_bytes, 5000);
}int16_t read_accel_axis(uint8_t address_msb)
{uint8_t accel_axis_buf[2];                                                                         // Initialize the Return Valueregister_read(I2C_ADDRESS,address_msb,2,accel_axis_buf);int16_t data=(accel_axis_buf[0]&0xFC) | (accel_axis_buf[1]<< 8);data = data / 4;                                                // divide the result by 4 to maintain the sign, since the data is 14 bitsreturn data;}static void write_byte(uint8_t address, uint8_t data)
{uint8_t wdata[QMA7981_ADDRESS_LEN+1] = {0};              // Initialize the Tx bufferwdata[0] = address;                                      // Put slave register address in Tx bufferwdata[1] = data;                                         // Put data in Tx bufferhal_i2c_master_transmit(&g_i2c_handle, I2C_ADDRESS, wdata, QMA7981_ADDRESS_LEN+1, 5000);  // Send the Tx buffer
}static uint8_t read_byte(uint8_t address)
{uint8_t data =0;                                                                          // Initialize the Return Valueuint8_t wdata[1] = {0};                                                                   // Initialize the Tx bufferwdata[0] = address;                                                                       // Put slave register address in Tx bufferhal_i2c_master_transmit(&g_i2c_handle, I2C_ADDRESS, wdata, QMA7981_ADDRESS_LEN, 5000);    // Send the Tx bufferhal_i2c_master_receive(&g_i2c_handle,  I2C_ADDRESS, &data, QMA7981_ADDRESS_LEN, 5000);    // Read one byte from slave register addressreturn data;                                                                              // Return data read from slave register
}void set_bit(uint8_t *byte, uint8_t n, bool value)
{*byte = (*byte & ~(1UL << n)) | (value << n);
}void soft_reset()
{write_byte(0x36, 0xB6);                 //0xB6, soft reset all of the registers.write_byte(0x36, 0x00);                 //After soft-reset, user should write 0x00 back
}void set_mode(uint8_t mode)
{uint8_t data = read_byte(0x11);//1, set device into active mode 0, set device into standby modeset_bit(&data, 7, mode);               write_byte(0x11, data);
}void set_clock_freq(uint8_t freq)
{uint8_t data = read_byte(0x11);data &= 0XF0;      data |= (freq & 0x0F); write_byte(0x11, data);
}void set_bandwidth(uint8_t bandwidth)
{uint8_t data = 0xE0;data |= (bandwidth & 0x07);write_byte(0x10, data);
}void set_interrupt_pin_1_type(bool open_drain, bool active_high)
{uint8_t data = read_byte(0x20);set_bit(&data, 0, active_high);set_bit(&data, 1, open_drain);write_byte(0x20, data);
}void set_interrupt_pin_1_type(bool open_drain, bool active_high)
{uint8_t data = read_byte(0x20);set_bit(&data, 0, active_high);set_bit(&data, 1, open_drain);write_byte(0x20, data);
}

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基于GR551x芯片的硬件IIC驱动QMA7981

基于GR551x芯片的硬件IIC驱动QMA7981

实现的函数

qma7981_init();

int16_t get_accel_x()

int16_t get_accel_y()

int16_t get_accel_z()

sensor_interrupt_enter();

QMA7981.H文件

QMA7981.C文件

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