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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@66 35acf78f-673a-0410-8e92-d51de3d6d3f4

This commit is contained in:
gdisirio 2007-10-26 15:08:54 +00:00
parent f021c6fe95
commit fb49ce4f3a
4 changed files with 47 additions and 23 deletions
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4
demos/AVR-AT90CANx-GCC/chconf.h
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@ -138,11 +138,11 @@
/** Configuration option: Frequency of the system timer that drives the system /** Configuration option: Frequency of the system timer that drives the system
* ticks. This also defines the system time unit.*/ * ticks. This also defines the system time unit.*/
#define CH_FREQUENCY 100 #define CH_FREQUENCY 1000
/** Configuration option: This constant is the number of ticks allowed for the /** Configuration option: This constant is the number of ticks allowed for the
* threads before preemption occurs.*/ * threads before preemption occurs.*/
#define CH_TIME_QUANTUM 10 #define CH_TIME_QUANTUM 20
/** Configuration option: Defines a CPU register to be used as storage for the /** Configuration option: Defines a CPU register to be used as storage for the
* global \p currp variable. Caching this variable in a register can greatly * global \p currp variable. Caching this variable in a register can greatly

11
demos/AVR-AT90CANx-GCC/chcore.c
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@ -108,6 +108,17 @@ void hwinit(void) {
* Enables Idle mode for SLEEP instruction. * Enables Idle mode for SLEEP instruction.
*/ */
SMCR = 1; SMCR = 1;
/*
* Timer 0 setup.
*/
TCCR0A = (1 << WGM01) | (0 << WGM00) | // CTC mode.
(0 << COM0A1) | (0 << COM0A0) | // OC0A disabled (normal I/O).
(0 << CS02) | (1 << CS01) | (1 << CS00); // CLK/64 clock source.
OCR0A = F_CPU / 64 / CH_FREQUENCY - 1;
TCNT0 = 0; // Reset counter.
TIFR0 = (1 << OCF0A); // Reset pending (if any).
TIMSK0 = (1 << OCIE0A); // Interrupt on compare.
} }
void chSysPause(void) { void chSysPause(void) {

10
demos/AVR-AT90CANx-GCC/chcore.h
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@ -79,8 +79,13 @@ typedef struct {
/** /**
* Platform dependent part of the \p chThdCreate() API. * Platform dependent part of the \p chThdCreate() API.
*/ */
#define SETUP_CONTEXT(workspace, wsize, pf, arg) \ #define SETUP_CONTEXT(workspace, wsize, pf, arg) { \
{ \ tp->p_ctx.sp--; \
tp->p_ctx.sp->r2 = (int)pf; \
tp->p_ctx.sp->r3 = (int)pf >> 8; \
tp->p_ctx.sp->r4 = (int)arg; \
tp->p_ctx.sp->r5 = (int)arg >> 8; \
tp->p_ctx.sp->pc = (UWORD16)threadstart; \
} }
/* /*
@ -100,6 +105,7 @@ typedef struct {
void chSysHalt(void) __attribute__((noreturn)) ; void chSysHalt(void) __attribute__((noreturn)) ;
void chSysPause(void) __attribute__((noreturn)) ; void chSysPause(void) __attribute__((noreturn)) ;
void chSysSwitchI(Context *oldp, Context *newp); void chSysSwitchI(Context *oldp, Context *newp);
void threadstart(void);
#endif /* _CHCORE_H_ */ #endif /* _CHCORE_H_ */

9
demos/AVR-AT90CANx-GCC/chcore2.S
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@ -19,6 +19,14 @@
#include <avr/io.h> #include <avr/io.h>
.global threadstart
threadstart:
sei
movw r24, r4 // argument
movw r30, r2 // thread function
icall
call chThdExit
.global chSysSwitchI .global chSysSwitchI
chSysSwitchI: chSysSwitchI:
push r2 push r2
@ -113,4 +121,3 @@ noschd:
pop r1 pop r1
pop r0 pop r0
reti reti