2 * Copyright © 2012 Keith Packard <keithp@keithp.com>
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.
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.
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.
25 * STM32L definitions and code fragments for AltOS
28 #define AO_STACK_SIZE 512
30 #define AO_LED_TYPE uint16_t
33 #define AO_TICK_TYPE uint16_t
34 #define AO_TICK_SIGNED int16_t
37 /* Various definitions to make GCC look more like SDCC */
39 #define ao_arch_naked_declare __attribute__((naked))
40 #define ao_arch_naked_define
47 #define __interrupt(n)
50 #define CORTEX_M3_AIRCR ((uint32_t *) 0xe000ed0c)
52 #define ao_arch_reboot() (*((uint32_t *) 0xe000ed0c) = 0x05fa0004)
54 #define ao_arch_nop() asm("nop")
56 #define ao_arch_interrupt(n) /* nothing */
60 #define putchar(c) ao_putchar(c)
61 #define getchar ao_getchar
63 extern void putchar(char c);
64 extern char getchar(void);
65 extern void ao_avr_stdio_init(void);
72 #define AO_ROMCONFIG_VERSION 2
74 #define AO_ROMCONFIG_SYMBOL(a) __attribute__((section(".romconfig"))) const
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;
81 #define ARM_PUSH32(stack, val) (*(--(stack)) = (val))
83 #define ao_arch_task_members\
84 uint32_t *sp; /* saved stack pointer */
86 #define cli() asm("cpsid i")
87 #define sei() asm("cpsie i")
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; \
94 /* Return address (goes into LR) */ \
97 /* Clear register values r0-r12 */ \
105 /* PRIMASK with interrupts enabled */ \
111 #define ao_arch_save_regs() do { \
112 /* Save general registers */ \
113 asm("push {r0-r12,lr}\n"); \
116 asm("mrs r0,apsr"); \
120 asm("mrs r0,primask"); \
123 /* Enable interrupts */ \
127 #define ao_arch_save_stack() do { \
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); \
136 #define ao_arch_isr_stack() do { \
137 uint32_t *sp = (uint32_t *) 0x20004000; \
138 asm("mov %0,sp" : "=&r" (sp) ); \
141 #define ao_arch_isr_stack()
145 #define ao_arch_cpu_idle() do { \
149 #define ao_arch_restore_stack() do { \
151 sp = (uint32_t) ao_cur_task->sp; \
153 /* Switch stacks */ \
154 asm("mov sp, %0" : : "r" (sp) ); \
156 /* Restore PRIMASK */ \
158 asm("msr primask,r0"); \
162 asm("msr apsr,r0"); \
164 /* Restore general registers */ \
165 asm("pop {r0-r12,lr}\n"); \
167 /* Return to calling function */ \
171 #define ao_arch_critical(b) do { cli(); do { b } while (0); sei(); } while (0)
174 * For now, we're running at a weird frequency
178 #define AO_PLLSRC AO_HSE
180 #define AO_PLLSRC STM_HSI_FREQ
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)
189 #if AO_APB1_PRESCALER == 1
190 #define AO_TIM23467_CLK AO_PCLK1
192 #define AO_TIM23467_CLK (2 * AO_PCLK1)
195 #if AO_APB2_PRESCALER == 1
196 #define AO_TIM91011_CLK AO_PCLK2
198 #define AO_TIM91011_CLK (2 * AO_PCLK2)
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
206 void ao_lcd_stm_init(void);
208 void ao_lcd_font_init(void);
210 void ao_lcd_font_string(char *s);
213 ao_serial1_getchar(void);
216 ao_serial1_putchar(char c);
219 ao_serial1_pollchar(void);
222 ao_serial1_set_speed(uint8_t speed);
225 ao_serial2_getchar(void);
228 ao_serial2_putchar(char c);
231 ao_serial2_pollchar(void);
234 ao_serial2_set_speed(uint8_t speed);
237 ao_serial3_getchar(void);
240 ao_serial3_putchar(char c);
243 ao_serial3_pollchar(void);
246 ao_serial3_set_speed(uint8_t speed);
248 extern const uint32_t ao_radio_cal;
253 #endif /* _AO_ARCH_H_ */