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 1.4 2004/11/16 21:54:43 bernie
19 *#* Changes for SC Monoboard support.
21 *#* Revision 1.3 2004/08/25 14:12:08 rasky
22 *#* Aggiornato il comment block dei log RCS
24 *#* Revision 1.2 2004/06/03 11:27:09 bernie
25 *#* Add dual-license information.
27 *#* Revision 1.1 2004/05/23 18:36:05 bernie
28 *#* Import buzzerled driver.
32 #ifndef DRV_BUZZERLED_DSP56K_H
33 #define DRV_BUZZERLED_DSP56K_H
42 * \name Connection of the leds to the DSP:
45 * ---------------------------
52 INLINE bool bld_is_inverted_intensity(enum BLD_DEVICE device)
54 return (device == BLD_GREEN_LED
55 || device == BLD_YELLOW_LED
56 || device == BLD_RED_LED);
59 INLINE bool bld_is_pwm(enum BLD_DEVICE device)
61 // Only the buzzer is connected to a PWM
62 return (device == BLD_BUZZER || device == BLD_READY_LED);
65 INLINE bool bld_is_timer(enum BLD_DEVICE device)
67 // LEDs are connected to timers
68 return (device == BLD_GREEN_LED || device == BLD_YELLOW_LED || device == BLD_RED_LED);
71 INLINE uint16_t bld_get_pwm(enum BLD_DEVICE device)
76 case BLD_BUZZER: return 5; // PWMA5
77 case BLD_READY_LED: return 9; // PWMB3
82 INLINE struct REG_TIMER_STRUCT* bld_get_timer(enum BLD_DEVICE device)
87 case BLD_GREEN_LED: return ®_TIMER_B[2];
88 case BLD_RED_LED: return ®_TIMER_B[1];
89 case BLD_YELLOW_LED: return ®_TIMER_B[3];
93 INLINE void bld_hw_init(void)
97 INLINE void bld_hw_set(enum BLD_DEVICE device, bool enable)
99 if (bld_is_inverted_intensity(device))
102 // Handle a BLD connected to a PWM
103 if (bld_is_pwm(device))
105 struct PWM* pwm = pwm_get_handle(bld_get_pwm(device));
107 pwm_set_enable(pwm, false);
108 pwm_set_dutycycle_percent(pwm, (enable ? 50 : 0));
109 pwm_set_enable(pwm, true);
111 else if (bld_is_timer(device))
113 struct REG_TIMER_STRUCT* timer = bld_get_timer(device);
115 // Check that the timer is currently stopped, and the OFLAG is not
116 // controlled by another timer. Otherwise, the led is already
117 // controlled by the timer, and we cannot correctly set it
118 // on/off without reprogramming the timer.
119 ASSERT((timer->CTRL & REG_TIMER_CTRL_MODE_MASK) == REG_TIMER_CTRL_MODE_STOP);
120 ASSERT(!(timer->SCR & REG_TIMER_SCR_EEOF));
122 // Check also that polarity is correct
123 ASSERT(!(timer->SCR & REG_TIMER_SCR_OPS));
125 // Without programming the timer, we have a way to manually force a certain
126 // value on the external pin. We also need to enable the output pin.
127 timer->SCR &= ~REG_TIMER_SCR_VAL_1;
128 timer->SCR |= REG_TIMER_SCR_OEN |
129 REG_TIMER_SCR_FORCE |
130 (!enable ? REG_TIMER_SCR_VAL_0 : REG_TIMER_SCR_VAL_1);
138 // We do not need inline functions here, because constant propagation is not big deal here
139 void bld_hw_init(void);
140 void bld_hw_set(enum BLD_DEVICE device, bool enable);
144 #endif /* DRV_BUZZERLED_DSP56K_H */