4 * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 2004 Giovanni Bajo
6 * This file is part of DevLib - See devlib/README for information.
9 * \brief Hardware support for buzzers and leds in DSP56K-based boards
13 * \author Giovanni Bajo <rasky@develer.com>
18 *#* Revision 1.3 2004/08/25 14:12:08 rasky
19 *#* Aggiornato il comment block dei log RCS
21 *#* Revision 1.2 2004/06/03 11:27:09 bernie
22 *#* Add dual-license information.
24 *#* Revision 1.1 2004/05/23 18:36:05 bernie
25 *#* Import buzzerled driver.
33 INLINE void bld_hw_init(void)
37 INLINE void bld_hw_set(enum BLD_DEVICE device, bool enable)
39 if (bld_is_inverted_intensity(device))
42 // Handle a BLD connected to a PWM
43 if (bld_is_pwm(device))
45 struct PWM* pwm = pwm_get_handle(bld_get_pwm(device));
47 pwm_set_enable(pwm, false);
48 pwm_set_dutycycle_percent(pwm, (enable ? 50 : 0));
49 pwm_set_enable(pwm, true);
51 else if (bld_is_timer(device))
53 struct REG_TIMER_STRUCT* timer = bld_get_timer(device);
55 // Check that the timer is currently stopped, and the OFLAG is not
56 // controlled by another timer. Otherwise, the led is already
57 // controlled by the timer, and we cannot correctly set it
58 // on/off without reprogramming the timer.
59 ASSERT((timer->CTRL & REG_TIMER_CTRL_MODE_MASK) == REG_TIMER_CTRL_MODE_STOP);
60 ASSERT(!(timer->SCR & REG_TIMER_SCR_EEOF));
62 // Check also that polarity is correct
63 ASSERT(!(timer->SCR & REG_TIMER_SCR_OPS));
65 // Without programming the timer, we have a way to manually force a certain
66 // value on the external pin. We also need to enable the output pin.
67 timer->SCR &= ~REG_TIMER_SCR_VAL_1;
68 timer->SCR |= REG_TIMER_SCR_OEN |
70 (!enable ? REG_TIMER_SCR_VAL_0 : REG_TIMER_SCR_VAL_1);