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/*
* Copyright © 2012 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 <stm32l.h>
/*
* STM32L definitions and code fragments for AltOS
*/
#define AO_STACK_SIZE 512
#define AO_LED_TYPE uint16_t
#ifndef AO_TICK_TYPE
#define AO_TICK_TYPE uint16_t
#define AO_TICK_SIGNED int16_t
#endif
/* 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 CORTEX_M3_AIRCR ((uint32_t *) 0xe000ed0c)
#define ao_arch_reboot() (*((uint32_t *) 0xe000ed0c) = 0x05fa0004)
#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);
/*
* ao_romconfig.c
*/
#define AO_ROMCONFIG_VERSION 2
#define AO_ROMCONFIG_SYMBOL(a) __attribute__((section(".romconfig"))) const
extern const uint16_t ao_romconfig_version;
extern const uint16_t ao_romconfig_check;
extern const uint16_t ao_serial_number;
extern const uint32_t ao_radio_cal;
#define ARM_PUSH32(stack, val) (*(--(stack)) = (val))
#define ao_arch_task_members\
uint32_t *sp; /* saved stack pointer */
#define cli() asm("cpsid i")
#define sei() asm("cpsie i")
#define ao_arch_init_stack(task, start) do { \
uint32_t *sp = (uint32_t *) (task->stack + AO_STACK_SIZE); \
uint32_t a = (uint32_t) start; \
int i; \
\
/* Return address (goes into LR) */ \
ARM_PUSH32(sp, a); \
\
/* Clear register values r0-r12 */ \
i = 13; \
while (i--) \
ARM_PUSH32(sp, 0); \
\
/* APSR */ \
ARM_PUSH32(sp, 0); \
\
/* PRIMASK with interrupts enabled */ \
ARM_PUSH32(sp, 0); \
\
task->sp = sp; \
} while (0);
#define ao_arch_save_regs() do { \
/* Save general registers */ \
asm("push {r0-r12,lr}\n"); \
\
/* Save APSR */ \
asm("mrs r0,apsr"); \
asm("push {r0}"); \
\
/* Save PRIMASK */ \
asm("mrs r0,primask"); \
asm("push {r0}"); \
\
/* Enable interrupts */ \
sei(); \
} while (0)
#define ao_arch_save_stack() do { \
uint32_t *sp; \
asm("mov %0,sp" : "=&r" (sp) ); \
ao_cur_task->sp = (sp); \
if ((uint8_t *) sp < &ao_cur_task->stack[0]) \
ao_panic (AO_PANIC_STACK); \
} while (0)
#if 0
#define ao_arch_isr_stack() do { \
uint32_t *sp = (uint32_t *) 0x20004000; \
asm("mov %0,sp" : "=&r" (sp) ); \
} while (0)
#else
#define ao_arch_isr_stack()
#endif
#define ao_arch_cpu_idle() do { \
asm("wfi"); \
} while (0)
#define ao_arch_restore_stack() do { \
uint32_t sp; \
sp = (uint32_t) ao_cur_task->sp; \
\
/* Switch stacks */ \
asm("mov sp, %0" : : "r" (sp) ); \
\
/* Restore PRIMASK */ \
asm("pop {r0}"); \
asm("msr primask,r0"); \
\
/* Restore APSR */ \
asm("pop {r0}"); \
asm("msr apsr,r0"); \
\
/* Restore general registers */ \
asm("pop {r0-r12,lr}\n"); \
\
/* Return to calling function */ \
asm("bx lr"); \
} while(0)
#define ao_arch_critical(b) do { cli(); do { b } while (0); sei(); } while (0)
/*
* For now, we're running at a weird frequency
*/
#if AO_HSE
#define AO_PLLSRC AO_HSE
#else
#define AO_PLLSRC STM_HSI_FREQ
#endif
#define AO_PLLVCO (AO_PLLSRC * AO_PLLMUL)
#define AO_SYSCLK (AO_PLLVCO / AO_PLLDIV)
#define AO_HCLK (AO_SYSCLK / AO_AHB_PRESCALER)
#define AO_PCLK1 (AO_HCLK / AO_APB1_PRESCALER)
#define AO_PCLK2 (AO_HCLK / AO_APB2_PRESCALER)
#if AO_APB1_PRESCALER == 1
#define AO_TIM23467_CLK AO_PCLK1
#else
#define AO_TIM23467_CLK (2 * AO_PCLK1)
#endif
#if AO_APB2_PRESCALER == 1
#define AO_TIM91011_CLK AO_PCLK2
#else
#define AO_TIM91011_CLK (2 * AO_PCLK2)
#endif
#define AO_STM_NVIC_HIGH_PRIORITY 4
#define AO_STM_NVIC_CLOCK_PRIORITY 6
#define AO_STM_NVIC_MED_PRIORITY 8
#define AO_STM_NVIC_LOW_PRIORITY 10
void ao_lcd_stm_init(void);
void ao_lcd_font_init(void);
void ao_lcd_font_string(char *s);
char
ao_serial1_getchar(void);
void
ao_serial1_putchar(char c);
char
ao_serial1_pollchar(void);
void
ao_serial1_set_speed(uint8_t speed);
char
ao_serial2_getchar(void);
void
ao_serial2_putchar(char c);
char
ao_serial2_pollchar(void);
void
ao_serial2_set_speed(uint8_t speed);
char
ao_serial3_getchar(void);
void
ao_serial3_putchar(char c);
char
ao_serial3_pollchar(void);
void
ao_serial3_set_speed(uint8_t speed);
extern const uint32_t ao_radio_cal;
void
ao_adc_init();
#endif /* _AO_ARCH_H_ */
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