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51 lines
2.9 KiB
51 lines
2.9 KiB
------------------------------------------------------------------------------
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-- --
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-- Copyright (C) 2018, AdaCore --
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-- --
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-- Redistribution and use in source and binary forms, with or without --
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-- modification, are permitted provided that the following conditions are --
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-- met: --
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-- 1. Redistributions of source code must retain the above copyright --
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-- notice, this list of conditions and the following disclaimer. --
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-- 2. Redistributions in binary form must reproduce the above copyright --
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-- notice, this list of conditions and the following disclaimer in --
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-- the documentation and/or other materials provided with the --
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-- distribution. --
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-- 3. Neither the name of the copyright holder nor the names of its --
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-- contributors may be used to endorse or promote products derived --
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-- from this software without specific prior written permission. --
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-- --
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-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS --
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-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT --
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-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR --
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-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT --
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-- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, --
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-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT --
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-- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, --
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-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY --
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-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT --
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-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE --
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-- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. --
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-- --
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------------------------------------------------------------------------------
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with HAL.I2C; use HAL.I2C;
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package MicroBit.I2C is
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type Speed is (S100kbps, S250kbps, S400kbps);
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function Initialized return Boolean;
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-- Return True if the I2C controller is initialized and ready to use
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procedure Initialize (S : Speed := S400kbps)
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with Post => Initialized;
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-- Initialize the I2C controller at given speed, using the micro:bit I2C
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-- pins:
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-- - P19 -> SCL
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-- - P20 -> SDA
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function Controller return not null Any_I2C_Port;
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-- Return the HAL.I2C controller implementation
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end MicroBit.I2C;
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