diff options
Diffstat (limited to 'src/avr/ao_arch.h')
| -rw-r--r-- | src/avr/ao_arch.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/src/avr/ao_arch.h b/src/avr/ao_arch.h new file mode 100644 index 00000000..c695a725 --- /dev/null +++ b/src/avr/ao_arch.h @@ -0,0 +1,158 @@ +/* + * Copyright © 2011 Keith Packard <keithp@keithp.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ + +#ifndef _AO_ARCH_H_ +#define _AO_ARCH_H_ + +#include <stdio.h> +#include <avr/io.h> +#include <avr/interrupt.h> +#include <avr/sleep.h> + +#ifdef AVR_DEMO +#define TEENSY 1 +#endif + +#if TEENSY +#define F_CPU 16000000UL // 16 MHz +#else +#define F_CPU 8000000UL // 8 MHz +#endif + +/* + * AVR definitions and code fragments for AltOS + */ + +#define AO_STACK_SIZE 128 + +/* Various definitions to make GCC look more like SDCC */ + +#define ao_arch_naked_declare __attribute__((naked)) +#define ao_arch_naked_define +#define __pdata +#define __data +#define __xdata +#define __code const +#define __reentrant +#define __critical +#define __interrupt(n) +#define __at(n) + +#define ao_arch_reboot() /* XXX */ + +#define ao_arch_nop() asm("nop") + +#define ao_arch_interrupt(n) /* nothing */ + +#undef putchar +#undef getchar +#define putchar(c) ao_putchar(c) +#define getchar ao_getchar + +extern void putchar(char c); +extern char getchar(void); +extern void ao_avr_stdio_init(void); + +extern const uint16_t ao_serial_number; + +#define AVR_PUSH8(stack, val) (*((stack)--) = (val)) + +extern uint8_t ao_cpu_sleep_disable; + +#define ao_arch_task_globals uint8_t ao_cpu_sleep_disable; + +#define ao_arch_task_members\ + uint8_t *sp; /* saved stack pointer */ + +#define ao_arch_init_stack(task, start) do { \ + uint8_t *sp = task->stack + AO_STACK_SIZE - 1; \ + uint16_t a = (uint16_t) start; \ + int i; \ + \ + /* Return address */ \ + AVR_PUSH8(sp, a); \ + AVR_PUSH8(sp, (a >> 8)); \ + \ + /* Clear register values */ \ + i = 32; \ + while (i--) \ + AVR_PUSH8(sp, 0); \ + \ + /* SREG with interrupts enabled */ \ + AVR_PUSH8(sp, 0x80); \ + task->sp = sp; \ +} while (0); + +#define ao_arch_save_regs() do { \ + asm("push r31" "\n\t" "push r30"); \ + asm("push r29" "\n\t" "push r28" "\n\t" "push r27" "\n\t" "push r26" "\n\t" "push r25"); \ + asm("push r24" "\n\t" "push r23" "\n\t" "push r22" "\n\t" "push r21" "\n\t" "push r20"); \ + asm("push r19" "\n\t" "push r18" "\n\t" "push r17" "\n\t" "push r16" "\n\t" "push r15"); \ + asm("push r14" "\n\t" "push r13" "\n\t" "push r12" "\n\t" "push r11" "\n\t" "push r10"); \ + asm("push r9" "\n\t" "push r8" "\n\t" "push r7" "\n\t" "push r6" "\n\t" "push r5"); \ + asm("push r4" "\n\t" "push r3" "\n\t" "push r2" "\n\t" "push r1" "\n\t" "push r0"); \ + cli(); \ + asm("in r0, __SREG__" "\n\t" "push r0"); \ + sei(); \ + } while (0) + +#define ao_arch_save_stack() do { \ + uint8_t sp_l, sp_h; \ + asm("in %0,__SP_L__" : "=&r" (sp_l) ); \ + asm("in %0,__SP_H__" : "=&r" (sp_h) ); \ + ao_cur_task->sp = (uint8_t *) ((uint16_t) sp_l | ((uint16_t) sp_h << 8)); \ + } while (0) + +#define ao_arch_isr_stack() /* nothing */ + +#define ao_arch_cpu_idle() do { \ + if (!ao_cpu_sleep_disable) \ + sleep_cpu(); \ + } while (0) + +#define ao_arch_restore_stack() do { \ + uint8_t sp_l, sp_h; \ + sp_l = (uint16_t) ao_cur_task->sp; \ + sp_h = ((uint16_t) ao_cur_task->sp) >> 8; \ + cli(); \ + asm("out __SP_H__,%0" : : "r" (sp_h) ); \ + asm("out __SP_L__,%0" : : "r" (sp_l) ); \ + asm("pop r0" "\n\t" \ + "out __SREG__, r0"); \ + asm("pop r0" "\n\t" "pop r1" "\n\t" "pop r2" "\n\t" "pop r3" "\n\t" "pop r4"); \ + asm("pop r5" "\n\t" "pop r6" "\n\t" "pop r7" "\n\t" "pop r8" "\n\t" "pop r9"); \ + asm("pop r10" "\n\t" "pop r11" "\n\t" "pop r12" "\n\t" "pop r13" "\n\t" "pop r14"); \ + asm("pop r15" "\n\t" "pop r16" "\n\t" "pop r17" "\n\t" "pop r18" "\n\t" "pop r19"); \ + asm("pop r20" "\n\t" "pop r21" "\n\t" "pop r22" "\n\t" "pop r23" "\n\t" "pop r24"); \ + asm("pop r25" "\n\t" "pop r26" "\n\t" "pop r27" "\n\t" "pop r28" "\n\t" "pop r29"); \ + asm("pop r30" "\n\t" "pop r31"); \ + asm("ret"); \ + } while(0) + +#define ao_arch_critical(b) do { cli(); b; sei(); } while (0) + +#define AO_TELESCIENCE_NUM_ADC 12 + +struct ao_adc { + uint16_t tick; /* tick when the sample was read */ + uint16_t adc[AO_TELESCIENCE_NUM_ADC]; /* samples */ +}; + +#define AO_ADC_RING 16 + +#endif /* _AO_ARCH_H_ */ + |