mirror of
https://github.com/licsber/micropython.git
synced 2024-09-20 09:00:23 +08:00
3f4898456b
Also contains raw memory read/write functions, read8, read16, read32, write8, write16, write32. Can now do: stm.write16(stm.GPIOA + stm.GPIO_BSRRL, 1 << 13) This turns on the red LED. With the new constant folding, the above constants for the GPIO address are actually compiled to constants (and the addition done) at compile time. For viper code and inline assembler, this optimisation will make a big difference. In the inline assembler, using these constants would not be possible without this constant folding.
121 lines
4.0 KiB
C
121 lines
4.0 KiB
C
#include <stdio.h>
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#include <stdint.h>
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#include <stm32f4xx_hal.h>
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#include "nlr.h"
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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#include "modstm.h"
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STATIC uint32_t get_read_addr(mp_obj_t addr_o, uint align) {
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uint32_t addr = mp_obj_get_int(addr_o) & 0x7fffffff;
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if (addr < 0x10000000) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "cannot read from address %08x", addr));
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}
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if ((addr & (align - 1)) != 0) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "address %08x is not aligned to %d bytes", addr, align));
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}
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return addr;
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}
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STATIC uint32_t get_write_addr(mp_obj_t addr_o, uint align) {
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uint32_t addr = mp_obj_get_int(addr_o) & 0x7fffffff;
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if (addr < 0x10000000) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "cannot write to address %08x", addr));
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}
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if ((addr & (align - 1)) != 0) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "address %08x is not aligned to %d bytes", addr, align));
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}
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return addr;
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}
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STATIC mp_obj_t stm_read8(mp_obj_t addr) {
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uint32_t a = get_read_addr(addr, 1);
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uint32_t v = *(uint8_t*)a;
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return mp_obj_new_int(v);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(stm_read8_obj, stm_read8);
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STATIC mp_obj_t stm_read16(mp_obj_t addr) {
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uint32_t a = get_read_addr(addr, 2);
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uint32_t v = *(uint16_t*)a;
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return mp_obj_new_int(v);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(stm_read16_obj, stm_read16);
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STATIC mp_obj_t stm_read32(mp_obj_t addr) {
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uint32_t a = get_read_addr(addr, 4);
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uint32_t v = *(uint32_t*)a;
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return mp_obj_new_int(v);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(stm_read32_obj, stm_read32);
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STATIC mp_obj_t stm_write8(mp_obj_t addr, mp_obj_t val) {
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uint32_t a = get_write_addr(addr, 1);
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uint32_t v = mp_obj_get_int(val);
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*(uint8_t*)a = v;
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(stm_write8_obj, stm_write8);
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STATIC mp_obj_t stm_write16(mp_obj_t addr, mp_obj_t val) {
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uint32_t a = get_write_addr(addr, 2);
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uint32_t v = mp_obj_get_int(val);
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*(uint16_t*)a = v;
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(stm_write16_obj, stm_write16);
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STATIC mp_obj_t stm_write32(mp_obj_t addr, mp_obj_t val) {
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uint32_t a = get_write_addr(addr, 4);
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uint32_t v = mp_obj_get_int(val);
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*(uint32_t*)a = v;
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(stm_write32_obj, stm_write32);
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STATIC const mp_map_elem_t stm_module_globals_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_stm) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read8), (mp_obj_t)&stm_read8_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read16), (mp_obj_t)&stm_read16_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read32), (mp_obj_t)&stm_read32_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_write8), (mp_obj_t)&stm_write8_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_write16), (mp_obj_t)&stm_write16_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_write32), (mp_obj_t)&stm_write32_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_GPIOA), MP_OBJ_NEW_SMALL_INT(GPIOA_BASE) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_GPIOB), MP_OBJ_NEW_SMALL_INT(GPIOB_BASE) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_GPIOC), MP_OBJ_NEW_SMALL_INT(GPIOC_BASE) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_GPIOD), MP_OBJ_NEW_SMALL_INT(GPIOD_BASE) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_GPIO_IDR), MP_OBJ_NEW_SMALL_INT(0x10) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_GPIO_BSRRL), MP_OBJ_NEW_SMALL_INT(0x18) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_GPIO_BSRRH), MP_OBJ_NEW_SMALL_INT(0x1a) },
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};
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STATIC const mp_obj_dict_t stm_module_globals = {
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.base = {&mp_type_dict},
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.map = {
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.all_keys_are_qstrs = 1,
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.table_is_fixed_array = 1,
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.used = sizeof(stm_module_globals_table) / sizeof(mp_map_elem_t),
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.alloc = sizeof(stm_module_globals_table) / sizeof(mp_map_elem_t),
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.table = (mp_map_elem_t*)stm_module_globals_table,
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},
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};
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const mp_obj_module_t stm_module = {
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.base = { &mp_type_module },
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.name = MP_QSTR_stm,
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.globals = (mp_obj_dict_t*)&stm_module_globals,
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};
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