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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   512
  29
  30 #define AO_LED_TYPE     uint16_t
  31
  32 #ifndef AO_TICK_TYPE
  33 #define AO_TICK_TYPE    uint16_t
  34 #define AO_TICK_SIGNED  int16_t
  35 #endif
  36
  37 /* Various definitions to make GCC look more like SDCC */
  38
  39 #define ao_arch_naked_declare   __attribute__((naked))
  40 #define ao_arch_naked_define
  41 #define __pdata
  42 #define __data
  43 #define __xdata
  44 #define __code const
  45 #define __reentrant
  46 #define __critical
  47 #define __interrupt(n)
  48 #define __at(n)
  49
  50 #define CORTEX_M3_AIRCR         ((uint32_t *) 0xe000ed0c)
  51
  52 #define ao_arch_reboot()        (*((uint32_t *) 0xe000ed0c) = 0x05fa0004)
  53
  54 #define ao_arch_nop()           asm("nop")
  55
  56 #define ao_arch_interrupt(n)    /* nothing */
  57
  58 #undef putchar
  59 #undef getchar
  60 #define putchar(c)      ao_putchar(c)
  61 #define getchar         ao_getchar
  62
  63 extern void putchar(char c);
  64 extern char getchar(void);
  65 extern void ao_avr_stdio_init(void);
  66
  67
  68 /*
  69  * ao_romconfig.c
  70  */
  71
  72 #define AO_ROMCONFIG_VERSION    2
  73
  74 #define AO_ROMCONFIG_SYMBOL(a) __attribute__((section(".romconfig"))) const
  75
  76 extern const uint16_t ao_romconfig_version;
  77 extern const uint16_t ao_romconfig_check;
  78 extern const uint16_t ao_serial_number;
  79 extern const uint32_t ao_radio_cal;
  80
  81 #define ARM_PUSH32(stack, val)  (*(--(stack)) = (val))
  82
  83 #define ao_arch_task_members\
  84         uint32_t *sp;                   /* saved stack pointer */
  85
  86 #define cli()   asm("cpsid i")
  87 #define sei()   asm("cpsie i")
  88
  89 #define ao_arch_init_stack(task, start) do {                            \
  90                 uint32_t        *sp = (uint32_t *) (task->stack + AO_STACK_SIZE); \
  91                 uint32_t        a = (uint32_t) start;                   \
  92                 int             i;                                      \
  93                                                                         \
  94                 /* Return address (goes into LR) */                     \
  95                 ARM_PUSH32(sp, a);                                      \
  96                                                                         \
  97                 /* Clear register values r0-r12 */                      \
  98                 i = 13;                                                 \
  99                 while (i--)                                             \
 100                         ARM_PUSH32(sp, 0);                              \
 101                                                                         \
 102                 /* APSR */                                              \
 103                 ARM_PUSH32(sp, 0);                                      \
 104                                                                         \
 105                 /* PRIMASK with interrupts enabled */                   \
 106                 ARM_PUSH32(sp, 0);                                      \
 107                                                                         \
 108                 task->sp = sp;                                          \
 109 } while (0);
 110
 111 #define ao_arch_save_regs()     do {                                    \
 112                 /* Save general registers */                            \
 113                 asm("push {r0-r12,lr}\n");                              \
 114                                                                         \
 115                 /* Save APSR */                                         \
 116                 asm("mrs r0,apsr");                                     \
 117                 asm("push {r0}");                                       \
 118                                                                         \
 119                 /* Save PRIMASK */                                      \
 120                 asm("mrs r0,primask");                                  \
 121                 asm("push {r0}");                                       \
 122                                                                         \
 123                 /* Enable interrupts */                                 \
 124                 sei();                                                  \
 125         } while (0)
 126
 127 #define ao_arch_save_stack() do {                                       \
 128                 uint32_t        *sp;                                    \
 129                 asm("mov %0,sp" : "=&r" (sp) );                         \
 130                 ao_cur_task->sp = (sp);                                 \
 131                 if ((uint8_t *) sp < &ao_cur_task->stack[0])            \
 132                         ao_panic (AO_PANIC_STACK);                      \
 133         } while (0)
 134
 135 #if 0
 136 #define ao_arch_isr_stack() do {                                \
 137                 uint32_t        *sp = (uint32_t *) 0x20004000;  \
 138                 asm("mov %0,sp" : "=&r" (sp) );                 \
 139         } while (0)
 140 #else
 141 #define ao_arch_isr_stack()
 142 #endif
 143
 144
 145 #define ao_arch_cpu_idle() do {                 \
 146                 asm("wfi");             \
 147         } while (0)
 148
 149 #define ao_arch_restore_stack() do { \
 150                 uint32_t        sp;                                     \
 151                 sp = (uint32_t) ao_cur_task->sp;                        \
 152                                                                         \
 153                 /* Switch stacks */                                     \
 154                 asm("mov sp, %0" : : "r" (sp) );                        \
 155                                                                         \
 156                 /* Restore PRIMASK */                                   \
 157                 asm("pop {r0}");                                        \
 158                 asm("msr primask,r0");                                  \
 159                                                                         \
 160                 /* Restore APSR */                                      \
 161                 asm("pop {r0}");                                        \
 162                 asm("msr apsr,r0");                                     \
 163                                                                         \
 164                 /* Restore general registers */                         \
 165                 asm("pop {r0-r12,lr}\n");                               \
 166                                                                         \
 167                 /* Return to calling function */                        \
 168                 asm("bx lr");                                           \
 169         } while(0)
 170
 171 #define ao_arch_critical(b) do { cli(); do { b } while (0); sei(); } while (0)
 172
 173 /*
 174  * For now, we're running at a weird frequency
 175  */
 176
 177 #if AO_HSE
 178 #define AO_PLLSRC       AO_HSE
 179 #else
 180 #define AO_PLLSRC       STM_HSI_FREQ
 181 #endif
 182
 183 #define AO_PLLVCO       (AO_PLLSRC * AO_PLLMUL)
 184 #define AO_SYSCLK       (AO_PLLVCO / AO_PLLDIV)
 185 #define AO_HCLK         (AO_SYSCLK / AO_AHB_PRESCALER)
 186 #define AO_PCLK1        (AO_HCLK / AO_APB1_PRESCALER)
 187 #define AO_PCLK2        (AO_HCLK / AO_APB2_PRESCALER)
 188
 189 #if AO_APB1_PRESCALER == 1
 190 #define AO_TIM23467_CLK         AO_PCLK1
 191 #else
 192 #define AO_TIM23467_CLK         (2 * AO_PCLK1)
 193 #endif
 194
 195 #if AO_APB2_PRESCALER == 1
 196 #define AO_TIM91011_CLK         AO_PCLK2
 197 #else
 198 #define AO_TIM91011_CLK         (2 * AO_PCLK2)
 199 #endif
 200
 201 #define AO_STM_NVIC_HIGH_PRIORITY       4
 202 #define AO_STM_NVIC_CLOCK_PRIORITY      6
 203 #define AO_STM_NVIC_MED_PRIORITY        8
 204 #define AO_STM_NVIC_LOW_PRIORITY        10
 205
 206 void ao_lcd_stm_init(void);
 207
 208 void ao_lcd_font_init(void);
 209
 210 void ao_lcd_font_string(char *s);
 211
 212 char
 213 ao_serial1_getchar(void);
 214
 215 void
 216 ao_serial1_putchar(char c);
 217
 218 char
 219 ao_serial1_pollchar(void);
 220
 221 void
 222 ao_serial1_set_speed(uint8_t speed);
 223
 224 char
 225 ao_serial2_getchar(void);
 226
 227 void
 228 ao_serial2_putchar(char c);
 229
 230 char
 231 ao_serial2_pollchar(void);
 232
 233 void
 234 ao_serial2_set_speed(uint8_t speed);
 235
 236 char
 237 ao_serial3_getchar(void);
 238
 239 void
 240 ao_serial3_putchar(char c);
 241
 242 char
 243 ao_serial3_pollchar(void);
 244
 245 void
 246 ao_serial3_set_speed(uint8_t speed);
 247
 248 extern const uint32_t   ao_radio_cal;
 249
 250 void
 251 ao_adc_init();
 252
 253 #endif /* _AO_ARCH_H_ */
 254