//*************************** low level operation **************************************//
static int bma020_detect(void)
{
int comres = 0;
unsigned char data;
/* get chip info. */
bma_dev.dev_addr = BMA020_I2C_ADDR; /* preset SM380 I2C_addr */
comres |= i2c_bma020_read_buf(CHIP_ID__REG, &data, 1);/* read Chip Id */
bma_dev.chip_id = BMA020_GET_BITSLICE(data, CHIP_ID); /* get bitslice */
comres |= i2c_bma020_read_buf(ML_VERSION__REG, &data, 1); /* read Version reg */
bma_dev.ml_version = BMA020_GET_BITSLICE(data, ML_VERSION); /* get ML Version */
bma_dev.al_version = BMA020_GET_BITSLICE(data, AL_VERSION);/* get AL Version */
return comres;
}
/* readout select range from BMA020
\param *range pointer to range setting
\return result of bus communication function
\see BMA020_RANGE_2G, BMA020_RANGE_4G, BMA020_RANGE_8G
\see bma020_set_range()
*/
int bma020_get_range(unsigned char *range)
{
int comres = 0;
comres = i2c_bma020_read_buf(RANGE__REG, range, 1);
*range = BMA020_GET_BITSLICE(*range, RANGE);
return comres;
}
int bma020_init(bma020_t *bma020)
{
int comres=0;
unsigned char data;
p_bma020 = bma020; /* assign bma020 ptr */
p_bma020->dev_addr = BMA020_I2C_ADDR; /* preset SM380 I2C_addr */
comres += p_bma020->BMA020_BUS_READ_FUNC(p_bma020->dev_addr, CHIP_ID__REG, &data, 1); /* read Chip Id */
p_bma020->chip_id = BMA020_GET_BITSLICE(data, CHIP_ID); /* get bitslice */
comres += p_bma020->BMA020_BUS_READ_FUNC(p_bma020->dev_addr, ML_VERSION__REG, &data, 1); /* read Version reg */
p_bma020->ml_version = BMA020_GET_BITSLICE(data, ML_VERSION); /* get ML Version */
p_bma020->al_version = BMA020_GET_BITSLICE(data, AL_VERSION); /* get AL Version */
return comres;
}
int bma020_init(bma020_t *bma020)
{
int comres=0;
unsigned char data;
p_bma020 = bma020; /* assign bma020 ptr */
p_bma020->dev_addr = BMA020_I2C_ADDR; /* preset SM380 I2C_addr */
comres += p_bma020->BMA020_BUS_READ_FUNC(p_bma020->dev_addr, CHIP_ID__REG, &data, 1); /* read Chip Id */
p_bma020->chip_id = BMA020_GET_BITSLICE(data, CHIP_ID); /* get bitslice */
comres += p_bma020->BMA020_BUS_READ_FUNC(p_bma020->dev_addr, ML_VERSION__REG, &data, 1); /* read Version reg */
p_bma020->ml_version = BMA020_GET_BITSLICE(data, ML_VERSION); /* get ML Version */
p_bma020->al_version = BMA020_GET_BITSLICE(data, AL_VERSION); /* get AL Version */
// make sure the default value of the interrupt enable register
data = 0x00; // All interrupt disable
p_bma020->BMA020_BUS_WRITE_FUNC(p_bma020->dev_addr, 0x0b, &data, 1 );
return comres;
}
int bma020_get_range(unsigned char *range)
{
int comres = 0;
if (p_bma020==0)
return E_BMA020_NULL_PTR;
comres = p_bma020->BMA020_BUS_READ_FUNC(p_bma020->dev_addr, RANGE__REG, range, 1 );
*range = BMA020_GET_BITSLICE(*range, RANGE);
return comres;
}
int bma020_get_offset(unsigned char xyz, unsigned short *offset)
{
int comres;
unsigned char data;
if (p_bma020==0)
return E_BMA020_NULL_PTR;
comres = p_bma020->BMA020_BUS_READ_FUNC(p_bma020->dev_addr, (OFFSET_X_LSB__REG+xyz), &data, 1);
data = BMA020_GET_BITSLICE(data, OFFSET_X_LSB);
*offset = data;
comres += p_bma020->BMA020_BUS_READ_FUNC(p_bma020->dev_addr, (OFFSET_X_MSB__REG+xyz), &data, 1);
*offset |= (data<<2);
return comres;
}