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
32 /* Various definitions to make GCC look more like SDCC */
34 #define ao_arch_naked_declare __attribute__((naked))
35 #define ao_arch_naked_define
42 #define __interrupt(n)
45 #define CORTEX_M3_AIRCR ((uint32_t *) 0xe000ed0c)
47 #define ao_arch_reboot() (*((uint32_t *) 0xe000ed0c) = 0x05fa0004)
49 #define ao_arch_nop() asm("nop")
51 #define ao_arch_interrupt(n) /* nothing */
55 #define putchar(c) ao_putchar(c)
56 #define getchar ao_getchar
58 extern void putchar(char c);
59 extern char getchar(void);
60 extern void ao_avr_stdio_init(void);
62 extern const uint16_t ao_serial_number;
64 #define ARM_PUSH32(stack, val) (*(--(stack)) = (val))
66 #define ao_arch_task_members\
67 uint32_t *sp; /* saved stack pointer */
69 #define cli() asm("cpsid i")
70 #define sei() asm("cpsie i")
72 #define ao_arch_init_stack(task, start) do { \
73 uint32_t *sp = (uint32_t *) (task->stack + AO_STACK_SIZE); \
74 uint32_t a = (uint32_t) start; \
77 /* Return address (goes into LR) */ \
80 /* Clear register values r0-r12 */ \
88 /* PRIMASK with interrupts enabled */ \
94 #define ao_arch_save_regs() do { \
95 /* Save general registers */ \
96 asm("push {r0-r12,lr}\n"); \
103 asm("mrs r0,primask"); \
106 /* Enable interrupts */ \
110 #define ao_arch_save_stack() do { \
112 asm("mov %0,sp" : "=&r" (sp) ); \
113 ao_cur_task->sp = (sp); \
114 if ((uint8_t *) sp < &ao_cur_task->stack[0]) \
115 ao_panic (AO_PANIC_STACK); \
119 #define ao_arch_isr_stack() do { \
120 uint32_t *sp = (uint32_t *) 0x20004000; \
121 asm("mov %0,sp" : "=&r" (sp) ); \
124 #define ao_arch_isr_stack()
128 #define ao_arch_cpu_idle() do { \
132 #define ao_arch_restore_stack() do { \
134 sp = (uint32_t) ao_cur_task->sp; \
136 /* Switch stacks */ \
137 asm("mov sp, %0" : : "r" (sp) ); \
139 /* Restore PRIMASK */ \
141 asm("msr primask,r0"); \
145 asm("msr apsr,r0"); \
147 /* Restore general registers */ \
148 asm("pop {r0-r12,lr}\n"); \
150 /* Return to calling function */ \
154 #define ao_arch_critical(b) do { cli(); do { b } while (0); sei(); } while (0)
157 * For now, we're running at a weird frequency
161 #define AO_PLLSRC AO_HSE
163 #define AO_PLLSRC STM_HSI_FREQ
166 #define AO_PLLVCO (AO_PLLSRC * AO_PLLMUL)
167 #define AO_SYSCLK (AO_PLLVCO / AO_PLLDIV)
168 #define AO_HCLK (AO_SYSCLK / AO_AHB_PRESCALER)
169 #define AO_PCLK1 (AO_HCLK / AO_APB1_PRESCALER)
170 #define AO_PCLK2 (AO_HCLK / AO_APB2_PRESCALER)
172 #if AO_APB1_PRESCALER == 1
173 #define AO_TIM23467_CLK AO_PCLK1
175 #define AO_TIM23467_CLK (2 * AO_PCLK1)
178 #if AO_APB2_PRESCALER == 1
179 #define AO_TIM91011_CLK AO_PCLK2
181 #define AO_TIM91011_CLK (2 * AO_PCLK2)
184 #define AO_STM_NVIC_HIGH_PRIORITY 4
185 #define AO_STM_NVIC_CLOCK_PRIORITY 6
186 #define AO_STM_NVIC_MED_PRIORITY 8
187 #define AO_STM_NVIC_LOW_PRIORITY 10
189 void ao_lcd_stm_init(void);
191 void ao_lcd_font_init(void);
193 void ao_lcd_font_string(char *s);
196 ao_serial1_getchar(void);
199 ao_serial1_putchar(char c);
202 ao_serial1_pollchar(void);
205 ao_serial1_set_speed(uint8_t speed);
208 ao_serial2_getchar(void);
211 ao_serial2_putchar(char c);
214 ao_serial2_pollchar(void);
217 ao_serial2_set_speed(uint8_t speed);
220 ao_serial3_getchar(void);
223 ao_serial3_putchar(char c);
226 ao_serial3_pollchar(void);
229 ao_serial3_set_speed(uint8_t speed);
231 extern const uint32_t ao_radio_cal;
236 #endif /* _AO_ARCH_H_ */