------------------------------------------------------------------------------ -- -- -- Copyright © AdaCore and other contributors, 2017-2020 -- -- See https://github.com/AdaCore/Ada_Drivers_Library/graphs/contributors -- -- for more information -- -- -- -- Redistribution and use in source and binary forms, with or without -- -- modification, are permitted provided that the following conditions are -- -- met: -- -- 1. Redistributions of source code must retain the above copyright -- -- notice, this list of conditions and the following disclaimer. -- -- 2. Redistributions in binary form must reproduce the above copyright -- -- notice, this list of conditions and the following disclaimer in -- -- the documentation and/or other materials provided with the -- -- distribution. -- -- 3. Neither the name of the copyright holder nor the names of its -- -- contributors may be used to endorse or promote products derived -- -- from this software without specific prior written permission. -- -- -- -- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -- -- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -- -- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -- -- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -- -- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -- -- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -- -- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -- -- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -- -- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -- -- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -- -- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -- -- -- ------------------------------------------------------------------------------ with NRF_SVD.SAADC; use NRF_SVD.SAADC; with nRF.Tasks; use nRF.Tasks; with System.Storage_Elements; package body nRF.ADC is procedure Set_Resolution (Res : Bits_Resolution); procedure Set_Reference (Ref : Reference_Selection); procedure Wait_For_Result; -------------------- -- Set_Resolution -- -------------------- procedure Set_Resolution (Res : Bits_Resolution) is begin SAADC_Periph.RESOLUTION.VAL := (case Res is when Res_8bit => Val_8BIT, when Res_10bit => Val_10BIT, when Res_12bit => Val_12BIT); end Set_Resolution; ------------------- -- Set_Reference -- ------------------- procedure Set_Reference (Ref : Reference_Selection) is begin case Ref is when Internal_0V6 => SAADC_Periph.CH (0).CONFIG.REFSEL := Internal; when VDD_One_Forth => SAADC_Periph.CH (0).CONFIG.REFSEL := Vdd1_4; end case; end Set_Reference; -------------------------- -- Start_Pin_Conversion -- -------------------------- function Do_Pin_Conversion (Pin : Analog_Pin; Input : Pin_Input_Selection; Ref : Reference_Selection; Res : Bits_Resolution) return UInt16 is Result : UInt16 with Volatile; begin Set_Resolution (Res); Set_Reference (Ref); SAADC_Periph.RESULT.PTR := UInt32 (System.Storage_Elements.To_Integer (Result'Address)); SAADC_Periph.RESULT.MAXCNT.MAXCNT := 1; case Input is when Pin_Quadruple => SAADC_Periph.CH (0).CONFIG.GAIN := Gain4; when Pin_Double => SAADC_Periph.CH (0).CONFIG.GAIN := Gain2; when Pin_Full => SAADC_Periph.CH (0).CONFIG.GAIN := Gain1; when Pin_Half => SAADC_Periph.CH (0).CONFIG.GAIN := Gain1_2; when Pin_One_Third => SAADC_Periph.CH (0).CONFIG.GAIN := Gain1_3; when Pin_One_Forth => SAADC_Periph.CH (0).CONFIG.GAIN := Gain1_4; when Pin_One_Fifth => SAADC_Periph.CH (0).CONFIG.GAIN := Gain1_5; when Pin_One_Sixth => SAADC_Periph.CH (0).CONFIG.GAIN := Gain1_6; end case; case Pin is when 0 => SAADC_Periph.CH (0).PSELP.PSELP := Analoginput0; when 1 => SAADC_Periph.CH (0).PSELP.PSELP := Analoginput1; when 2 => SAADC_Periph.CH (0).PSELP.PSELP := Analoginput2; when 3 => SAADC_Periph.CH (0).PSELP.PSELP := Analoginput3; when 4 => SAADC_Periph.CH (0).PSELP.PSELP := Analoginput4; when 5 => SAADC_Periph.CH (0).PSELP.PSELP := Analoginput5; when 6 => SAADC_Periph.CH (0).PSELP.PSELP := Analoginput6; when 7 => SAADC_Periph.CH (0).PSELP.PSELP := Analoginput7; end case; SAADC_Periph.ENABLE.ENABLE := Enabled; Trigger (ADC_START); Wait_For_Result; return Result; end Do_Pin_Conversion; -------------------------- -- Start_VDD_Conversion -- -------------------------- function Do_VDD_Conversion (Input : VDD_Input_Selection; Ref : Reference_Selection; Res : Bits_Resolution) return UInt16 is Result : UInt16 with Volatile; begin Set_Resolution (Res); Set_Reference (Ref); SAADC_Periph.CH (0).PSELP.PSELP := Vdd; SAADC_Periph.RESULT.PTR := UInt32 (System.Storage_Elements.To_Integer (Result'Address)); SAADC_Periph.RESULT.MAXCNT.MAXCNT := 1; case Input is when VDD_One_Fifth => SAADC_Periph.CH (0).CONFIG.GAIN := Gain1_5; when VDD_One_Sixth => SAADC_Periph.CH (0).CONFIG.GAIN := Gain1_6; end case; SAADC_Periph.ENABLE.ENABLE := Enabled; Trigger (ADC_START); Wait_For_Result; return Result; end Do_VDD_Conversion; ---------- -- Busy -- ---------- function Busy return Boolean is (SAADC_Periph.STATUS.STATUS = Busy); --------------------- -- Wait_For_Result -- --------------------- procedure Wait_For_Result is begin while Busy loop null; end loop; SAADC_Periph.ENABLE.ENABLE := Enabled; end Wait_For_Result; end nRF.ADC;