4 * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 2004 Giovanni Bajo
9 * \brief Hardware support for buzzers and leds in DSP56K-based boards
13 * \author Giovanni Bajo <rasky@develer.com>
18 * Revision 1.1 2004/05/23 18:36:05 bernie
19 * Import buzzerled driver.
27 INLINE void bld_hw_init(void)
31 INLINE void bld_hw_set(enum BLD_DEVICE device, bool enable)
33 if (bld_is_inverted_intensity(device))
36 // Handle a BLD connected to a PWM
37 if (bld_is_pwm(device))
39 struct PWM* pwm = pwm_get_handle(bld_get_pwm(device));
41 pwm_set_enable(pwm, false);
42 pwm_set_dutycycle_percent(pwm, (enable ? 50 : 0));
43 pwm_set_enable(pwm, true);
45 else if (bld_is_timer(device))
47 struct REG_TIMER_STRUCT* timer = bld_get_timer(device);
49 // Check that the timer is currently stopped, and the OFLAG is not
50 // controlled by another timer. Otherwise, the led is already
51 // controlled by the timer, and we cannot correctly set it
52 // on/off without reprogramming the timer.
53 ASSERT((timer->CTRL & REG_TIMER_CTRL_MODE_MASK) == REG_TIMER_CTRL_MODE_STOP);
54 ASSERT(!(timer->SCR & REG_TIMER_SCR_EEOF));
56 // Check also that polarity is correct
57 ASSERT(!(timer->SCR & REG_TIMER_SCR_OPS));
59 // Without programming the timer, we have a way to manually force a certain
60 // value on the external pin. We also need to enable the output pin.
61 timer->SCR &= ~REG_TIMER_SCR_VAL_1;
62 timer->SCR |= REG_TIMER_SCR_OEN |
64 (!enable ? REG_TIMER_SCR_VAL_0 : REG_TIMER_SCR_VAL_1);