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iocompat.h

00001 /*
00002  * ----------------------------------------------------------------------------
00003  * "THE BEER-WARE LICENSE" (Revision 42):
00004  * <joerg@FreeBSD.ORG> wrote this file.  As long as you retain this notice you
00005  * can do whatever you want with this stuff. If we meet some day, and you think
00006  * this stuff is worth it, you can buy me a beer in return.        Joerg Wunsch
00007  * ----------------------------------------------------------------------------
00008  *
00009  * IO feature compatibility definitions for various AVRs.
00010  *
00011  * $Id$
00012  */
00013 
00014 #if !defined(IOCOMPAT_H)
00015 #define IOCOMPAT_H 1
00016 
00017 /*
00018  * Device-specific adjustments:
00019  *
00020  * Supply definitions for the location of the OCR1[A] port/pin, the
00021  * name of the OCR register controlling the PWM, and adjust interrupt
00022  * vector names that differ from the one used in demo.c
00023  * [TIMER1_OVF_vect].
00024  */
00025 #if defined(__AVR_AT90S2313__)
00026 #  define OC1 PB3
00027 #  define OCR OCR1
00028 #  define DDROC DDRB
00029 #  define TIMER1_OVF_vect TIMER1_OVF1_vect
00030 #elif defined(__AVR_AT90S2333__) || defined(__AVR_AT90S4433__)
00031 #  define OC1 PB1
00032 #  define DDROC DDRB
00033 #  define OCR OCR1
00034 #elif defined(__AVR_AT90S4414__) || defined(__AVR_AT90S8515__) || \
00035       defined(__AVR_AT90S4434__) || defined(__AVR_AT90S8535__) || \
00036       defined(__AVR_ATmega163__) || defined(__AVR_ATmega8515__) || \
00037       defined(__AVR_ATmega8535__) || \
00038       defined(__AVR_ATmega164P__) || defined(__AVR_ATmega324P__) || \
00039       defined(__AVR_ATmega644__) || defined(__AVR_ATmega644P__) || \
00040       defined(__AVR_ATmega1284P__)
00041 #  define OC1 PD5
00042 #  define DDROC DDRD
00043 #  define OCR OCR1A
00044 #  if !defined(TIMSK)       /* new ATmegas */
00045 #    define TIMSK TIMSK1
00046 #  endif
00047 #elif defined(__AVR_ATmega8__) || defined(__AVR_ATmega48__) || \
00048       defined(__AVR_ATmega88__) || defined(__AVR_ATmega168__)
00049 #  define OC1 PB1
00050 #  define DDROC DDRB
00051 #  define OCR OCR1A
00052 #  if !defined(TIMSK)       /* ATmega48/88/168 */
00053 #    define TIMSK TIMSK1
00054 #  endif /* !defined(TIMSK) */
00055 #elif defined(__AVR_ATtiny2313__)
00056 #  define OC1 PB3
00057 #  define OCR OCR1A
00058 #  define DDROC DDRB
00059 #elif defined(__AVR_ATtiny24__) || defined(__AVR_ATtiny44__) || \
00060       defined(__AVR_ATtiny84__)
00061 #  define OC1 PA6
00062 #  define DDROC DDRA
00063 #  if !defined(OCR1A)
00064 #    /* work around misspelled name in avr-libc 1.4.[0..1] */
00065 #    define OCR OCRA1
00066 #  else
00067 #    define OCR OCR1A
00068 #  endif
00069 #  define TIMSK TIMSK1
00070 #  define TIMER1_OVF_vect TIM1_OVF_vect /* XML and datasheet mismatch */
00071 #elif defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || \
00072       defined(__AVR_ATtiny85__)
00073 /* Timer 1 is only an 8-bit timer on these devices. */
00074 #  define OC1 PB1
00075 #  define DDROC DDRB
00076 #  define OCR OCR1A
00077 #  define TCCR1A TCCR1
00078 #  define TCCR1B TCCR1
00079 #  define TIMER1_OVF_vect TIM1_OVF_vect
00080 #  define TIMER1_TOP 255    /* only 8-bit PWM possible */
00081 #  define TIMER1_PWM_INIT _BV(PWM1A) | _BV(COM1A1)
00082 #  define TIMER1_CLOCKSOURCE _BV(CS12) /* use 1/8 prescaler */
00083 #elif defined(__AVR_ATtiny26__)
00084 /* Rather close to ATtinyX5 but different enough for its own section. */
00085 #  define OC1 PB1
00086 #  define DDROC DDRB
00087 #  define OCR OCR1A
00088 #  define TIMER1_OVF_vect TIMER1_OVF1_vect
00089 #  define TIMER1_TOP 255    /* only 8-bit PWM possible */
00090 #  define TIMER1_PWM_INIT _BV(PWM1A) | _BV(COM1A1)
00091 #  define TIMER1_CLOCKSOURCE _BV(CS12) /* use 1/8 prescaler */
00092 /*
00093  * Without setting OCR1C to TOP, the ATtiny26 does not trigger an
00094  * overflow interrupt in PWM mode.
00095  */
00096 #  define TIMER1_SETUP_HOOK() OCR1C = 255
00097 #elif defined(__AVR_ATtiny261__) || defined(__AVR_ATtiny461__) || \
00098       defined(__AVR_ATtiny861__)
00099 #  define OC1 PB1
00100 #  define DDROC DDRB
00101 #  define OCR OCR1A
00102 #  define TIMER1_PWM_INIT _BV(WGM10) | _BV(PWM1A) | _BV(COM1A1)
00103 /*
00104  * While timer 1 could be operated in 10-bit mode on these devices,
00105  * the handling of the 10-bit IO registers is more complicated than
00106  * that of the 16-bit registers of other AVR devices (no combined
00107  * 16-bit IO operations possible), so we restrict this demo to 8-bit
00108  * mode which is pretty standard.
00109  */
00110 #  define TIMER1_TOP 255
00111 #  define TIMER1_CLOCKSOURCE _BV(CS12) /* use 1/8 prescaler */
00112 #elif defined(__AVR_ATmega32__) || defined(__AVR_ATmega16__)
00113 #  define OC1 PD5
00114 #  define DDROC DDRD
00115 #  define OCR OCR1A
00116 #elif defined(__AVR_ATmega64__) || defined(__AVR_ATmega128__) || \
00117       defined(__AVR_ATmega165__) || defined(__AVR_ATmega169__) || \
00118       defined(__AVR_ATmega325__) || defined(__AVR_ATmega3250__) || \
00119       defined(__AVR_ATmega645__) || defined(__AVR_ATmega6450__) || \
00120       defined(__AVR_ATmega329__) || defined(__AVR_ATmega3290__) || \
00121       defined(__AVR_ATmega649__) || defined(__AVR_ATmega6490__) || \
00122       defined(__AVR_ATmega640__) || \
00123       defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1281__) || \
00124       defined(__AVR_ATmega2560__) || defined(__AVR_ATmega2561__) || \
00125       defined(__AVR_ATmega32U4__)
00126 #  define OC1 PB5
00127 #  define DDROC DDRB
00128 #  define OCR OCR1A
00129 #  if !defined(PB5)         /* work around missing bit definition */
00130 #    define PB5 5
00131 #  endif
00132 #  if !defined(TIMSK)       /* new ATmegas */
00133 #    define TIMSK TIMSK1
00134 #  endif
00135 #else
00136 #  error "Don't know what kind of MCU you are compiling for"
00137 #endif
00138 
00139 /*
00140  * Map register names for older AVRs here.
00141  */
00142 #if !defined(COM1A1)
00143 #  define COM1A1 COM11
00144 #endif
00145 
00146 #if !defined(WGM10)
00147 #  define WGM10 PWM10
00148 #  define WGM11 PWM11
00149 #endif
00150 
00151 /*
00152  * Provide defaults for device-specific macros unless overridden
00153  * above.
00154  */
00155 #if !defined(TIMER1_TOP)
00156 #  define TIMER1_TOP 1023   /* 10-bit PWM */
00157 #endif
00158 
00159 #if !defined(TIMER1_PWM_INIT)
00160 #  define TIMER1_PWM_INIT _BV(WGM10) | _BV(WGM11) | _BV(COM1A1)
00161 #endif
00162 
00163 #if !defined(TIMER1_CLOCKSOURCE)
00164 #  define TIMER1_CLOCKSOURCE _BV(CS10) /* full clock */
00165 #endif
00166 
00167 #endif /* !defined(IOCOMPAT_H) */
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