Curtis Belknap
/
LSM303DLHTest
LSM303DLH Test Program for get angle.
Fork of LSM303DLHTest by
main.cpp
- Committer:
- tosihisa
- Date:
- 2010-11-28
- Revision:
- 1:14b97953bd2f
- Parent:
- 0:750784997b84
- Child:
- 2:39cdefe3c9f2
File content as of revision 1:14b97953bd2f:
/* * LSM303DLH Test program * @tosihisa */ #include "mbed.h" #ifndef M_PI #define M_PI 3.14159265358979323846 #endif Serial debug(USBTX,USBRX); I2C LSM303DLH(p28, p27); const int addr_acc = 0x30; const int addr_mag = 0x3c; enum REG_ADDRS { /* --- Mag --- */ CRA_REG_M = 0x00, CRB_REG_M = 0x01, MR_REG_M = 0x02, OUT_X_M = 0x03, OUT_Y_M = 0x05, OUT_Z_M = 0x07, /* --- Acc --- */ CTRL_REG1_A = 0x20, OUT_X_A = 0x28, OUT_Y_A = 0x2A, OUT_Z_A = 0x2C, }; bool write_reg(int addr_i2c,int addr_reg, char v) { char data[2] = {addr_reg, v}; return LSM303DLH.write(addr_i2c, data, 2) == 0; } bool read_reg(int addr_i2c,int addr_reg, char *v) { char data = addr_reg; if ((LSM303DLH.write(addr_i2c, &data, 1) == 0) && (LSM303DLH.read(addr_i2c, &data, 1) == 0)){ *v = data; return true; } return false; } bool read_reg_short(int addr_i2c,int addr_reg, short *v,int hi) { char *pv = (char *)v; if(hi){ read_reg(addr_i2c,addr_reg+0,pv+1); return read_reg(addr_i2c,addr_reg+1,pv+0); } else { read_reg(addr_i2c,addr_reg+0,pv+0); return read_reg(addr_i2c,addr_reg+1,pv+1); } } int main() { char reg_v; bool result; short a_x,a_y,a_z; short m_x,m_y,m_z; double m_deg; debug.format(8,Serial::None,1); debug.baud(115200); debug.printf("LSM303DLH Test\x0d\x0a"); reg_v = 0; result = read_reg(addr_acc,CTRL_REG1_A,®_v); debug.printf("(%s) CTRL_REG1_A=[0x%02X]\x0d\x0a",(result) ? "OK" : "NG",reg_v); reg_v = 0; result = read_reg(addr_mag,CRA_REG_M,®_v); debug.printf("(%s) CRA_REG_M=[0x%02X]\x0d\x0a",(result) ? "OK" : "NG",reg_v); reg_v = 0; reg_v |= 0x01 << 5; /* Normal mode */ reg_v |= 0x07; /* X/Y/Z axis enable. */ result = write_reg(addr_acc,CTRL_REG1_A,reg_v); reg_v = 0; result = read_reg(addr_acc,CTRL_REG1_A,®_v); debug.printf("(%s) CTRL_REG1_A=[0x%02X]\x0d\x0a",(result) ? "OK" : "NG",reg_v); reg_v = 0; reg_v |= 0x04 << 2; /* Minimum data output rate = 15Hz */ result = write_reg(addr_mag,CRA_REG_M,reg_v); reg_v = 0; reg_v |= 0x01 << 5; /* +-1.3Gauss */ result = write_reg(addr_mag,CRB_REG_M,reg_v); reg_v = 0; /* Continuous-conversion mode */ result = write_reg(addr_mag,MR_REG_M,reg_v); while(1) { read_reg_short(addr_acc,OUT_X_A,&a_x,0); read_reg_short(addr_acc,OUT_Y_A,&a_y,0); read_reg_short(addr_acc,OUT_Z_A,&a_z,0); read_reg_short(addr_mag,OUT_X_M,&m_x,1); read_reg_short(addr_mag,OUT_Y_M,&m_y,1); read_reg_short(addr_mag,OUT_Z_M,&m_z,1); m_deg = (atan2((double)(m_x),(double)(m_y)) * 180) / M_PI; if(m_deg < 0){ m_deg = m_deg * -1.0; } else { m_deg = 360.0 - m_deg; } debug.printf("ACC:X=%-7d,Y=%-7d,Z=%-7d ",a_x,a_y,a_z); debug.printf("MAG:X=%-7d,Y=%-7d,Z=%-7d DEG=%f\x0d\x0a",m_x,m_y,m_z,m_deg); wait(0.1); } }