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/***********************************************************************
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* File: buzzer_led.c
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* Version: 1.0.0
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* Copyright: 2011 (c) Guo Wenxue <guowenxue@gmail.com>
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* Description: This C code used to turn buzzer on/off on FL2440 board
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* ChangeLog: 1, Release initial version on "Tue Mar 22 21:58:24 CST 2011"
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*
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***********************************************************************/
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#define GPBCON (*(unsigned long volatile *)0x56000010)
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#define GPBDAT (*(unsigned long volatile *)0x56000014)
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#define GPBUP (*(unsigned long volatile *)0x56000018)
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#define BEEP 0 /* Buzzer use GPB0 */
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#define LED0 5 /* LED0 use GPB5*/
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#define LED1 6 /* LED1 use GPB6*/
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#define LED2 8 /* LED2 use GPB8*/
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#define LED3 10 /* LED3 use GPB10*/
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#define DELAY_TIME 40000000
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unsigned int led_gpio[4] = {5,6,8,10};
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static inline void delay (unsigned long loops)
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{
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__asm__ volatile ("1:\n"
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"subs %0, %1, #1\n"
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"bne 1b":"=r" (loops):"0" (loops));
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}
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void init_led_buzzer(void)
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{
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GPBCON = (GPBCON|0x333C03)&0x111401; /* Set GPB0,GPB5,GPB8,GPB10 as GPIO input mode */
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GPBDAT |= 0x560; /* Set GPB0,GPB5,GPB6,GPB8,GPB10 as high level */
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}
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void turn_led_on(int led)
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{
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if(led > 3)
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return;
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/* Set GPIO port as low level */
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GPBDAT = (GPBDAT & ( ~(1<<led_gpio[led])) );
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}
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/* Turn all LED off */
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void turn_all_led_off(void)
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{
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GPBDAT |= 0x560; /* Set GPIO port as high level */
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}
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void turn_beep_on(void)
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{
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GPBDAT |= 1<<BEEP; /* Set Beep GPIO as high level, turn beep on */
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}
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void turn_beep_off(void)
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{
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GPBDAT &= ~(1<<BEEP); /* Set Beep GPIO as low level, turn beep off */
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}
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void turn_buzzer(int times)
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{
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int i;
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for(i=0; i<times; i++)
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{
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turn_beep_on();
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delay(DELAY_TIME);
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turn_beep_off();
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delay(DELAY_TIME);
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}
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}
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void turn_led_buzzer_off(void)
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{
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turn_all_led_off();
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turn_beep_off();
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return;
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}
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/* Input value $key is passed by start.S
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*
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* Key2 pressed -> key=0, turn LED0 on, beep for 1 time
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* Key3 pressed -> key=1, turn LED1 on, beep for 2 time
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* Key4 pressed -> key=2, turn LED2 on, beep for 3 time
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* Key5 pressed -> key=3, turn LED3 on, beep for 4 time
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*/
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void turn_led_buzzer_on(int key)
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{
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turn_led_on(key); /* Set correspond LED on */
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turn_buzzer(key+1); /* Let buzzer beep for $key times */
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}
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