about the drive of sensor

Question

when config 'CONFIG_BMA280=y' in 'prj.conf' file,but Solution 'build' not compiled,the code 'bma280.c' also not included in the project,why???

meqyj. · Answer

static int i2c_nrfx_twim_transfer(struct device *dev, struct i2c_msg *msgs, u8_t num_msgs, u16_t addr) { int ret = 0; 
 k_sem_take(&(get_dev_data(dev)->transfer_sync), K_FOREVER); nrfx_twim_enable(&get_dev_config(dev)->twim); 
 for (size_t i = 0; i < num_msgs; i++) { if (I2C_MSG_ADDR_10_BITS & msgs[i].flags) { ret = -ENOTSUP; break; } 
 nrfx_twim_xfer_desc_t cur_xfer = { .p_primary_buf = msgs[i].buf, .primary_length = msgs[i].len, .address = addr, .type = (msgs[i].flags & I2C_MSG_READ) ? NRFX_TWIM_XFER_RX : NRFX_TWIM_XFER_TX }; LOG_INF("i2c device transfer: %x,%x", *msgs[i].buf, addr); nrfx_err_t res = nrfx_twim_xfer(&get_dev_config(dev)->twim, &cur_xfer, (msgs[i].flags & I2C_MSG_STOP) ? 0 : NRFX_TWIM_FLAG_TX_NO_STOP); LOG_INF("i2c device ret: %d", res); if (res != NRFX_SUCCESS) { if (res == NRFX_ERROR_BUSY) { ret = -EBUSY; break; } else { ret = -EIO; break; } } 
 k_sem_take(&(get_dev_data(dev)->completion_sync), K_FOREVER); res = get_dev_data(dev)->res; if (res != NRFX_SUCCESS) { LOG_ERR("Error %d occurred for message %d", res, i); ret = -EIO; break; } } 
 nrfx_twim_disable(&get_dev_config(dev)->twim); k_sem_give(&(get_dev_data(dev)->transfer_sync)); 
 return ret; } 
 ======================================= 
 look at here pls: 
 LOG_INF("i2c device transfer: %x,%x", *msgs[i].buf, addr); 
 It show that reg & addr is ok,but the result is that: 
 LOG_ERR("Error %d occurred for message %d", res, i);

about the drive of sensor

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