// ************************************************************************************************* // // Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/ // // // 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. // // 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. // // Neither the name of Texas Instruments Incorporated 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 // OWNER 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. // // ************************************************************************************************* #ifndef BUZZER_H_ #define BUZZER_H_ // ************************************************************************************************* // Include section // ************************************************************************************************* // Prototypes section extern void reset_buzzer(void); extern void start_buzzer(u8 cycles, u16 on_time, u16 off_time); extern void stop_buzzer(void); extern void toggle_buzzer(void); extern u8 is_buzzer(void); extern void countdown_buzzer(void); // ************************************************************************************************* // Defines section // Buzzer states #define BUZZER_OFF (0u) #define BUZZER_ON_OUTPUT_DISABLED (1u) #define BUZZER_ON_OUTPUT_ENABLED (2u) // Buzzer modes #define BUZZER_MODE_SINGLE (0u) #define BUZZER_MODE_SINGLE_CONTINUOUS (1u) #define BUZZER_MODE_DOUBLE_CONTINUOUS (2u) // Buzzer output signal frequency = 32,768kHz/(BUZZER_TIMER_STEPS+1)/2 = 2.7kHz #define BUZZER_TIMER_STEPS (5u) // Buzzer on time #define BUZZER_ON_TICKS (CONV_MS_TO_TICKS(20)) // Buzzer off time #define BUZZER_OFF_TICKS (CONV_MS_TO_TICKS(200)) // ************************************************************************************************* // Global Variable section struct buzzer { // Keep output for "time" seconds u8 time; // On/off duty u16 on_time; u16 off_time; // Current buzzer output state u8 state; }; extern struct buzzer sBuzzer; // ************************************************************************************************* // Extern section #endif /*BUZZER_H_*/