text stringlengths 0 234 |
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----------------------------------- |
-- Set_Measurement_Timing_Budget -- |
----------------------------------- |
procedure Set_Measurement_Timing_Budget |
(This : VL53L0X_Ranging_Sensor; |
Budget_Micro_Seconds : HAL.UInt32; |
Status : out Boolean) |
is |
Final_Range_Timing_Budget_us : UInt32; |
Sequence_Steps : VL53L0x_Sequence_Step_Enabled; |
Pre_Range_Timeout_us : UInt32 := 0; |
Sub_Timeout : UInt32 := 0; |
Msrc_Dcc_Tcc_Timeout : UInt32; |
begin |
Status := True; |
Final_Range_Timing_Budget_us := |
Budget_Micro_Seconds - Start_Overhead - End_Overhead |
- Final_Range_Overhead; |
Sequence_Steps := Sequence_Step_Enabled (This); |
if not Sequence_Steps (Final_Range) then |
return; |
end if; |
if Sequence_Steps (TCC) |
or else Sequence_Steps (MSRC) |
or else Sequence_Steps (DSS) |
then |
Msrc_Dcc_Tcc_Timeout := Sequence_Step_Timeout (This, MSRC); |
if Sequence_Steps (TCC) then |
Sub_Timeout := Msrc_Dcc_Tcc_Timeout + Tcc_Overhead; |
end if; |
if Sequence_Steps (DSS) then |
Sub_Timeout := |
Sub_Timeout + 2 * (Msrc_Dcc_Tcc_Timeout + Dss_Overhead); |
elsif Sequence_Steps (MSRC) then |
Sub_Timeout := Sub_Timeout + Msrc_Dcc_Tcc_Timeout + Msrc_Overhead; |
end if; |
end if; |
if Sequence_Steps (Pre_Range) then |
Pre_Range_Timeout_us := Sequence_Step_Timeout (This, Pre_Range); |
Sub_Timeout := |
Sub_Timeout + Pre_Range_Timeout_us + Pre_Range_Overhead; |
end if; |
if Sub_Timeout < Final_Range_Timing_Budget_us then |
Final_Range_Timing_Budget_us := |
Final_Range_Timing_Budget_us - Sub_Timeout; |
else |
-- Requested timeout too big |
Status := False; |
return; |
end if; |
declare |
VCSel_Pulse_Period_Pclk : UInt8; |
Encoded_UInt16 : UInt16; |
Timeout_Mclks : UInt32; |
begin |
if Sequence_Steps (Pre_Range) then |
VCSel_Pulse_Period_Pclk := |
VCSel_Pulse_Period (This, Pre_Range); |
Read (This, REG_PRE_RANGE_CONFIG_TIMEOUT_MACROP_HI, |
Encoded_UInt16, Status); |
if Status then |
Timeout_Mclks := Decode_Timeout (Encoded_UInt16); |
end if; |
else |
Timeout_Mclks := 0; |
end if; |
VCSel_Pulse_Period_Pclk := |
VCSel_Pulse_Period (This, Final_Range); |
Timeout_Mclks := Timeout_Mclks + To_Timeout_Mclks |
(Final_Range_Timing_Budget_us, |
VCSel_Pulse_Period_Pclk); |
Write (This, REG_FINAL_RANGE_CONFIG_TIMEOUT_MACROP_HI, |
Encode_Timeout (Timeout_Mclks), Status); |
Function Definition: function To_U32 is new Ada.Unchecked_Conversion |
Function Body: (Fix_Point_16_16, UInt32); |
Val : UInt16; |
Status : Boolean; |
begin |
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