What configuration settings are you using with the ADXL345? It sounds like you have either Auto Sleep Mode or Standby Mode enabled. In the POWER_CTL register make sure bit D4 (AUTO_SLEEP) is cleared and bit D3 (Measure) is set.
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What configuration settings are you using with the ADXL345? It sounds like you have either Auto Sleep Mode or Standby Mode enabled. In the POWER_CTL register make sure bit D4 (AUTO_SLEEP) is cleared and bit D3 (Measure) is set.