X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=drv%2Ftimer_avr.h;h=2e2095df5b8e258c6018e9e16dfeb7afbf7aed81;hb=06f0503a2066ab4fd13529b8ed8906e52b1d672b;hp=96be9da6610394cc026654b00669e526db9a81f7;hpb=e518efdb8447093b4db0bd48d2a8103fceb840a7;p=bertos.git diff --git a/drv/timer_avr.h b/drv/timer_avr.h index 96be9da6..2e2095df 100755 --- a/drv/timer_avr.h +++ b/drv/timer_avr.h @@ -1,7 +1,7 @@ /*! * \file * @@ -13,54 +13,52 @@ * \brief Low-level timer module for AVR */ -/* - * $Log$ - * Revision 1.13 2004/08/24 14:30:11 bernie - * Use new-style config macros for drv/timer.c - * - * Revision 1.12 2004/08/10 06:59:45 bernie - * CONFIG_TIMER_STROBE: Define no-op default macros. - * - * Revision 1.11 2004/08/03 15:53:17 aleph - * Fix spacing - * - * Revision 1.10 2004/08/02 20:20:29 aleph - * Merge from project_ks - * - * Revision 1.9 2004/07/22 02:01:14 bernie - * Use TIMER_PRESCALER consistently. - * - * Revision 1.8 2004/07/20 23:50:20 bernie - * Also define TIMER_PRESCALER. - * - * Revision 1.7 2004/07/20 23:49:40 bernie - * Compute value of OCR_DIVISOR from CLOCK_FREQ. - * - * Revision 1.6 2004/07/20 23:48:16 bernie - * Finally remove redundant protos. - * - * Revision 1.5 2004/07/18 22:16:35 bernie - * Add missing header; Prevent warning for project_ks-specific code. - * - * Revision 1.4 2004/06/27 15:22:15 aleph - * Fix spacing - * - * Revision 1.3 2004/06/07 15:57:40 aleph - * Update to latest AVR timer code - * - * Revision 1.2 2004/06/03 11:27:09 bernie - * Add dual-license information. - * - * Revision 1.1 2004/05/23 18:23:30 bernie - * Import drv/timer module. - * - */ - +/*#* + *#* $Log$ + *#* Revision 1.20 2004/11/16 20:59:46 bernie + *#* Include explicitly. + *#* + *#* Revision 1.19 2004/10/19 08:56:41 bernie + *#* TIMER_STROBE_ON, TIMER_STROBE_OFF, TIMER_STROBE_INIT: Move from timer_avr.h to timer.h, where they really belong. + *#* + *#* Revision 1.18 2004/09/20 03:31:03 bernie + *#* Fix racy racy code. + *#* + *#* Revision 1.17 2004/09/14 21:07:09 bernie + *#* Include hw.h explicitly. + *#* + *#* Revision 1.16 2004/09/06 21:49:26 bernie + *#* CONFIG_TIMER_STROBE: be tolerant with missing optional macro. + *#* + *#* Revision 1.15 2004/08/25 14:12:08 rasky + *#* Aggiornato il comment block dei log RCS + *#* + *#* Revision 1.14 2004/08/24 16:27:01 bernie + *#* Add missing headers. + *#* + *#* Revision 1.13 2004/08/24 14:30:11 bernie + *#* Use new-style config macros for drv/timer.c + *#* + *#* Revision 1.12 2004/08/10 06:59:45 bernie + *#* CONFIG_TIMER_STROBE: Define no-op default macros. + *#* + *#* Revision 1.11 2004/08/03 15:53:17 aleph + *#* Fix spacing + *#* + *#* Revision 1.10 2004/08/02 20:20:29 aleph + *#* Merge from project_ks + *#* + *#* Revision 1.9 2004/07/22 02:01:14 bernie + *#* Use TIMER_PRESCALER consistently. + *#*/ #ifndef DRV_TIMER_AVR_H #define DRV_TIMER_AVR_H -#include +#include // ARCH_BOARD_KC +#include "hw.h" + #include +#include #if defined(ARCH_BOARD_KC) && (ARCH & ARCH_BOARD_KC) #include @@ -78,23 +76,6 @@ #define TIMER_ON_OUTPUT_COMPARE2 3 -/*! - * \def CONFIG_TIMER_STROBE - * - * This is a debug facility that can be used to - * monitor timer interrupt activity on an external pin. - * - * To use strobes, redefine the macros TIMER_STROBE_ON, - * TIMER_STROBE_OFF and TIMER_STROBE_INIT and set - * CONFIG_TIMER_STROBE to 1. - */ -#ifndef CONFIG_TIMER_STROBE - #define TIMER_STROBE_ON do {/*nop*/} while(0) - #define TIMER_STROBE_OFF do {/*nop*/} while(0) - #define TIMER_STROBE_INIT do {/*nop*/} while(0) -#endif - - /* Not needed, IRQ timer flag cleared automatically */ #define timer_hw_irq() do {} while (0) @@ -244,22 +225,6 @@ */ SIGNAL(SIG_OVERFLOW1) { - /*! - * How many overflow we have to count before calling the true timer handler. - * If timer overflow is at 24 kHz, with a value of 24 we have 1 ms between - * each call. - */ - #define TIMER1_OVF_COUNT 24 - - static uint8_t count = TIMER1_OVF_COUNT; - - count--; - if (!count) - { - timer_handler(); - count = TIMER1_OVF_COUNT; - } - #if (ARCH & ARCH_BOARD_KC) /* * Super-optimization-hack: switch CPU ADC mux here, ASAP after the start @@ -270,18 +235,49 @@ * of the handler. * * The switch is synchronized with the ADC handler using _adc_trigger_lock. + * + * Mel (A Real Programmer) */ extern uint8_t _adc_idx_next; extern bool _adc_trigger_lock; if (!_adc_trigger_lock) { - TIMER_STROBE_ON; + /* + * Disable free-running mode to avoid starting a + * new conversion before the ADC handler has read + * the ongoing one. This condition could occur + * under very high interrupt load and would have the + * unwanted effect of reading from the wrong ADC + * channel. + * + * NOTE: writing 0 to ADSC and ADIF has no effect. + */ + ADCSRA = ADCSRA & ~(BV(ADFR) | BV(ADIF) | BV(ADSC)); + ADC_SETCHN(_adc_idx_next); - TIMER_STROBE_OFF; _adc_trigger_lock = true; } - #endif + #endif // ARCH_BOARD_KC + + /*! + * How many timer overflows we must count before calling the real + * timer handler. + * When the timer is programmed to overflow at 24 kHz, a value of + * 24 will result in 1ms between each call. + */ + #define TIMER1_OVF_COUNT 24 + //#warning TIMER1_OVF_COUNT for timer at 12 kHz + //#define TIMER1_OVF_COUNT 12 + + static uint8_t count = TIMER1_OVF_COUNT; + + count--; + if (!count) + { + timer_handler(); + count = TIMER1_OVF_COUNT; + } } #elif (CONFIG_TIMER == TIMER_ON_OUTPUT_COMPARE0)