msp_dpl_read
rev1 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001e);
rev2 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001f);
auto_detect = msp_dpl_read(bktr, bktr->msp_addr, 0x10, 0x007e);
stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
rev1 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001e);
rev2 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001f);
msp->data = msp_dpl_read(bktr, bktr->msp_addr,
unsigned int msp_dpl_read( bktr_ptr_t bktr, int i2c_addr, unsigned char dev, unsigned int addr );