4 * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 2004 Giovanni Bajo
6 * This file is part of DevLib - See README.devlib for information.
9 * \brief Hardware support for buzzers and leds in DSP56K-based boards
13 * \author Giovanni Bajo <rasky@develer.com>
18 *#* Revision 1.7 2006/07/19 12:56:25 bernie
19 *#* Convert to new Doxygen style.
21 *#* Revision 1.6 2005/11/04 16:20:02 bernie
22 *#* Fix reference to README.devlib in header.
24 *#* Revision 1.5 2005/04/11 19:10:27 bernie
25 *#* Include top-level headers from cfg/ subdir.
27 *#* Revision 1.4 2004/11/16 21:54:43 bernie
28 *#* Changes for SC Monoboard support.
30 *#* Revision 1.3 2004/08/25 14:12:08 rasky
31 *#* Aggiornato il comment block dei log RCS
33 *#* Revision 1.2 2004/06/03 11:27:09 bernie
34 *#* Add dual-license information.
36 *#* Revision 1.1 2004/05/23 18:36:05 bernie
37 *#* Import buzzerled driver.
41 #ifndef DRV_BUZZERLED_DSP56K_H
42 #define DRV_BUZZERLED_DSP56K_H
44 #include <cfg/compiler.h>
51 * \name Connection of the leds to the DSP:
54 * ---------------------------
61 INLINE bool bld_is_inverted_intensity(enum BLD_DEVICE device)
63 return (device == BLD_GREEN_LED
64 || device == BLD_YELLOW_LED
65 || device == BLD_RED_LED);
68 INLINE bool bld_is_pwm(enum BLD_DEVICE device)
70 // Only the buzzer is connected to a PWM
71 return (device == BLD_BUZZER || device == BLD_READY_LED);
74 INLINE bool bld_is_timer(enum BLD_DEVICE device)
76 // LEDs are connected to timers
77 return (device == BLD_GREEN_LED || device == BLD_YELLOW_LED || device == BLD_RED_LED);
80 INLINE uint16_t bld_get_pwm(enum BLD_DEVICE device)
85 case BLD_BUZZER: return 5; // PWMA5
86 case BLD_READY_LED: return 9; // PWMB3
91 INLINE struct REG_TIMER_STRUCT* bld_get_timer(enum BLD_DEVICE device)
96 case BLD_GREEN_LED: return ®_TIMER_B[2];
97 case BLD_RED_LED: return ®_TIMER_B[1];
98 case BLD_YELLOW_LED: return ®_TIMER_B[3];
102 INLINE void bld_hw_init(void)
106 INLINE void bld_hw_set(enum BLD_DEVICE device, bool enable)
108 if (bld_is_inverted_intensity(device))
111 // Handle a BLD connected to a PWM
112 if (bld_is_pwm(device))
114 struct PWM* pwm = pwm_get_handle(bld_get_pwm(device));
116 pwm_set_enable(pwm, false);
117 pwm_set_dutycycle_percent(pwm, (enable ? 50 : 0));
118 pwm_set_enable(pwm, true);
120 else if (bld_is_timer(device))
122 struct REG_TIMER_STRUCT* timer = bld_get_timer(device);
124 // Check that the timer is currently stopped, and the OFLAG is not
125 // controlled by another timer. Otherwise, the led is already
126 // controlled by the timer, and we cannot correctly set it
127 // on/off without reprogramming the timer.
128 ASSERT((timer->CTRL & REG_TIMER_CTRL_MODE_MASK) == REG_TIMER_CTRL_MODE_STOP);
129 ASSERT(!(timer->SCR & REG_TIMER_SCR_EEOF));
131 // Check also that polarity is correct
132 ASSERT(!(timer->SCR & REG_TIMER_SCR_OPS));
134 // Without programming the timer, we have a way to manually force a certain
135 // value on the external pin. We also need to enable the output pin.
136 timer->SCR &= ~REG_TIMER_SCR_VAL_1;
137 timer->SCR |= REG_TIMER_SCR_OEN |
138 REG_TIMER_SCR_FORCE |
139 (!enable ? REG_TIMER_SCR_VAL_0 : REG_TIMER_SCR_VAL_1);
147 // We do not need inline functions here, because constant propagation is not big deal here
148 void bld_hw_init(void);
149 void bld_hw_set(enum BLD_DEVICE device, bool enable);
153 #endif /* DRV_BUZZERLED_DSP56K_H */