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   1 /*
   2  * Copyright © 2012 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 #ifndef _AO_ARCH_H_
  19 #define _AO_ARCH_H_
  20
  21 #include <stdio.h>
  22 #include <stm32l.h>
  23
  24 /*
  25  * STM32L definitions and code fragments for AltOS
  26  */
  27
  28 #define AO_STACK_SIZE   668
  29
  30 #define AO_LED_TYPE     uint16_t
  31
  32 /* Various definitions to make GCC look more like SDCC */
  33
  34 #define ao_arch_naked_declare   __attribute__((naked))
  35 #define ao_arch_naked_define
  36 #define __pdata
  37 #define __data
  38 #define __xdata
  39 #define __code const
  40 #define __reentrant
  41 #define __critical
  42 #define __interrupt(n)
  43 #define __at(n)
  44
  45 #define CORTEX_M3_AIRCR         ((uint32_t *) 0xe000ed0c)
  46
  47 #define ao_arch_reboot()        (*((uint32_t *) 0xe000ed0c) = 0x05fa0004)
  48
  49 #define ao_arch_nop()           asm("nop")
  50
  51 #define ao_arch_interrupt(n)    /* nothing */
  52
  53 #undef putchar
  54 #undef getchar
  55 #define putchar(c)      ao_putchar(c)
  56 #define getchar         ao_getchar
  57
  58 extern void putchar(char c);
  59 extern char getchar(void);
  60 extern void ao_avr_stdio_init(void);
  61
  62
  63 /*
  64  * ao_romconfig.c
  65  */
  66
  67 #define AO_ROMCONFIG_VERSION    2
  68
  69 #define AO_ROMCONFIG_SYMBOL(a) __attribute__((section(".romconfig"))) const
  70
  71 extern const uint16_t ao_romconfig_version;
  72 extern const uint16_t ao_romconfig_check;
  73 extern const uint16_t ao_serial_number;
  74 extern const uint32_t ao_radio_cal;
  75
  76 #define ARM_PUSH32(stack, val)  (*(--(stack)) = (val))
  77
  78 #define ao_arch_task_members\
  79         uint32_t *sp;                   /* saved stack pointer */
  80
  81 #define cli()   asm("cpsid i")
  82 #define sei()   asm("cpsie i")
  83
  84 #define ao_arch_init_stack(task, start) do {                            \
  85                 uint32_t        *sp = (uint32_t *) (task->stack + AO_STACK_SIZE); \
  86                 uint32_t        a = (uint32_t) start;                   \
  87                 int             i;                                      \
  88                                                                         \
  89                 /* Return address (goes into LR) */                     \
  90                 ARM_PUSH32(sp, a);                                      \
  91                                                                         \
  92                 /* Clear register values r0-r12 */                      \
  93                 i = 13;                                                 \
  94                 while (i--)                                             \
  95                         ARM_PUSH32(sp, 0);                              \
  96                                                                         \
  97                 /* APSR */                                              \
  98                 ARM_PUSH32(sp, 0);                                      \
  99                                                                         \
 100                 /* PRIMASK with interrupts enabled */                   \
 101                 ARM_PUSH32(sp, 0);                                      \
 102                                                                         \
 103                 task->sp = sp;                                          \
 104 } while (0);
 105
 106 #define ao_arch_save_regs()     do {                                    \
 107                 /* Save general registers */                            \
 108                 asm("push {r0-r12,lr}\n");                              \
 109                                                                         \
 110                 /* Save APSR */                                         \
 111                 asm("mrs r0,apsr");                                     \
 112                 asm("push {r0}");                                       \
 113                                                                         \
 114                 /* Save PRIMASK */                                      \
 115                 asm("mrs r0,primask");                                  \
 116                 asm("push {r0}");                                       \
 117                                                                         \
 118                 /* Enable interrupts */                                 \
 119                 sei();                                                  \
 120         } while (0)
 121
 122 #define ao_arch_save_stack() do {                                       \
 123                 uint32_t        *sp;                                    \
 124                 asm("mov %0,sp" : "=&r" (sp) );                         \
 125                 ao_cur_task->sp = (sp);                                 \
 126                 if ((uint8_t *) sp < &ao_cur_task->stack[0])            \
 127                         ao_panic (AO_PANIC_STACK);                      \
 128         } while (0)
 129
 130 #if 0
 131 #define ao_arch_isr_stack() do {                                \
 132                 uint32_t        *sp = (uint32_t *) 0x20004000;  \
 133                 asm("mov %0,sp" : "=&r" (sp) );                 \
 134         } while (0)
 135 #else
 136 #define ao_arch_isr_stack()
 137 #endif
 138
 139
 140 #define ao_arch_cpu_idle() do {                 \
 141                 asm("wfi");             \
 142         } while (0)
 143
 144 #define ao_arch_restore_stack() do { \
 145                 uint32_t        sp;                                     \
 146                 sp = (uint32_t) ao_cur_task->sp;                        \
 147                                                                         \
 148                 /* Switch stacks */                                     \
 149                 asm("mov sp, %0" : : "r" (sp) );                        \
 150                                                                         \
 151                 /* Restore PRIMASK */                                   \
 152                 asm("pop {r0}");                                        \
 153                 asm("msr primask,r0");                                  \
 154                                                                         \
 155                 /* Restore APSR */                                      \
 156                 asm("pop {r0}");                                        \
 157                 asm("msr apsr,r0");                                     \
 158                                                                         \
 159                 /* Restore general registers */                         \
 160                 asm("pop {r0-r12,lr}\n");                               \
 161                                                                         \
 162                 /* Return to calling function */                        \
 163                 asm("bx lr");                                           \
 164         } while(0)
 165
 166 #define ao_arch_critical(b) do { cli(); do { b } while (0); sei(); } while (0)
 167
 168 /*
 169  * For now, we're running at a weird frequency
 170  */
 171
 172 #if AO_HSE
 173 #define AO_PLLSRC       AO_HSE
 174 #else
 175 #define AO_PLLSRC       STM_HSI_FREQ
 176 #endif
 177
 178 #define AO_PLLVCO       (AO_PLLSRC * AO_PLLMUL)
 179 #define AO_SYSCLK       (AO_PLLVCO / AO_PLLDIV)
 180 #define AO_HCLK         (AO_SYSCLK / AO_AHB_PRESCALER)
 181 #define AO_PCLK1        (AO_HCLK / AO_APB1_PRESCALER)
 182 #define AO_PCLK2        (AO_HCLK / AO_APB2_PRESCALER)
 183
 184 #if AO_APB1_PRESCALER == 1
 185 #define AO_TIM23467_CLK         AO_PCLK1
 186 #else
 187 #define AO_TIM23467_CLK         (2 * AO_PCLK1)
 188 #endif
 189
 190 #if AO_APB2_PRESCALER == 1
 191 #define AO_TIM91011_CLK         AO_PCLK2
 192 #else
 193 #define AO_TIM91011_CLK         (2 * AO_PCLK2)
 194 #endif
 195
 196 #define AO_STM_NVIC_HIGH_PRIORITY       4
 197 #define AO_STM_NVIC_CLOCK_PRIORITY      6
 198 #define AO_STM_NVIC_MED_PRIORITY        8
 199 #define AO_STM_NVIC_LOW_PRIORITY        10
 200
 201 void ao_lcd_stm_init(void);
 202
 203 void ao_lcd_font_init(void);
 204
 205 void ao_lcd_font_string(char *s);
 206
 207 char
 208 ao_serial1_getchar(void);
 209
 210 void
 211 ao_serial1_putchar(char c);
 212
 213 char
 214 ao_serial1_pollchar(void);
 215
 216 void
 217 ao_serial1_set_speed(uint8_t speed);
 218
 219 char
 220 ao_serial2_getchar(void);
 221
 222 void
 223 ao_serial2_putchar(char c);
 224
 225 char
 226 ao_serial2_pollchar(void);
 227
 228 void
 229 ao_serial2_set_speed(uint8_t speed);
 230
 231 char
 232 ao_serial3_getchar(void);
 233
 234 void
 235 ao_serial3_putchar(char c);
 236
 237 char
 238 ao_serial3_pollchar(void);
 239
 240 void
 241 ao_serial3_set_speed(uint8_t speed);
 242
 243 extern const uint32_t   ao_radio_cal;
 244
 245 void
 246 ao_adc_init();
 247
 248 #endif /* _AO_ARCH_H_ */
 249