-- Test a PCA9685 as 16 individual PWM outputs -- Copyright (C)2018-2023, Philip Munts dba Munts Technologies. -- -- Redistribution and use in source and binary forms, with or without -- modification, are permitted provided that the following conditions are met: -- -- * Redistributions of source code must retain the above copyright notice, -- this list of conditions and the following disclaimer. -- -- 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 Ada.Text_IO; USE Ada.Text_IO; WITH Ada.Integer_Text_IO; USE Ada.Integer_Text_IO; WITH Device; WITH I2C.libsimpleio; WITH PCA9685.PWM; WITH PWM; USE TYPE PWM.DutyCycle; PROCEDURE test_pca9685_pwm IS desg : Device.Designator; addr : I2C.Address; freq : Positive; bus : I2C.Bus; dev : PCA9685.Device; pins : ARRAY (PCA9685.ChannelNumber) OF PWM.Output; BEGIN New_Line; Put_Line("PCA9685 PWM Output Test"); New_Line; desg := Device.GetDesignator(0, "Enter I2C bus: "); addr := I2C.GetAddress("Enter I2C dev address: "); Put("Enter PWM frequency: "); Get(freq); -- Create I2C bus object bus := I2C.libsimpleio.Create(desg); -- Create PCA9685 device object dev := PCA9685.Create(bus, addr, freq); -- Configure PWM outputs FOR n IN pins'Range LOOP pins(n) := PCA9685.PWM.Create(dev, n); END LOOP; -- Sweep PWM output pulse widths Put_Line("Sweep PWM output pulse widths..."); LOOP FOR n IN Natural RANGE 0 .. 1000 LOOP FOR p OF pins LOOP p.Put(100.0*PWM.DutyCycle(Float(n)/1000.0)); END LOOP; END LOOP; FOR n IN Natural RANGE 0 .. 1000 LOOP FOR p OF pins LOOP p.Put(100.0*PWM.DutyCycle(Float(1000 - n)/1000.0)); END LOOP; END LOOP; END LOOP; END test_pca9685_pwm;