diff options
Diffstat (limited to 'extmod/machine_spi.c')
| -rw-r--r-- | extmod/machine_spi.c | 286 |
1 files changed, 0 insertions, 286 deletions
diff --git a/extmod/machine_spi.c b/extmod/machine_spi.c deleted file mode 100644 index 4ead321d9..000000000 --- a/extmod/machine_spi.c +++ /dev/null @@ -1,286 +0,0 @@ -/* - * This file is part of the MicroPython project, http://micropython.org/ - * - * The MIT License (MIT) - * - * Copyright (c) 2016 Damien P. George - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include <stdio.h> -#include <string.h> - -#include "py/runtime.h" -#include "extmod/machine_spi.h" - -#include "supervisor/shared/translate.h" - -#if MICROPY_PY_MACHINE_SPI - -// if a port didn't define MSB/LSB constants then provide them -#ifndef MICROPY_PY_MACHINE_SPI_MSB -#define MICROPY_PY_MACHINE_SPI_MSB (0) -#define MICROPY_PY_MACHINE_SPI_LSB (1) -#endif - -/******************************************************************************/ -// MicroPython bindings for generic machine.SPI - -STATIC mp_obj_t mp_machine_soft_spi_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args); - -mp_obj_t mp_machine_spi_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) { - // check the id argument, if given - if (n_args > 0) { - if (args[0] != MP_OBJ_NEW_SMALL_INT(-1)) { - #if defined(MICROPY_PY_MACHINE_SPI_MAKE_NEW) - // dispatch to port-specific constructor - extern mp_obj_t MICROPY_PY_MACHINE_SPI_MAKE_NEW(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args); - return MICROPY_PY_MACHINE_SPI_MAKE_NEW(type, n_args, args, kw_args); - #else - mp_raise_ValueError(translate("invalid SPI peripheral")); - #endif - } - --n_args; - ++args; - } - - // software SPI - return mp_machine_soft_spi_make_new(type, n_args, args, kw_args); -} - -STATIC mp_obj_t machine_spi_init(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) { - mp_obj_base_t *s = (mp_obj_base_t*)MP_OBJ_TO_PTR(args[0]); - mp_machine_spi_p_t *spi_p = (mp_machine_spi_p_t*)mp_proto_get(QSTR_protocol_spi, s); - spi_p->init(s, n_args - 1, args + 1, kw_args); - return mp_const_none; -} -STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_spi_init_obj, 1, machine_spi_init); - -STATIC mp_obj_t machine_spi_deinit(mp_obj_t self) { - mp_obj_base_t *s = (mp_obj_base_t*)MP_OBJ_TO_PTR(self); - mp_machine_spi_p_t *spi_p = (mp_machine_spi_p_t*)mp_proto_get(QSTR_protocol_spi, s); - if (spi_p->deinit != NULL) { - spi_p->deinit(s); - } - return mp_const_none; -} -STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_spi_deinit_obj, machine_spi_deinit); - -STATIC void mp_machine_spi_transfer(mp_obj_t self, size_t len, const void *src, void *dest) { - mp_obj_base_t *s = (mp_obj_base_t*)MP_OBJ_TO_PTR(self); - mp_machine_spi_p_t *spi_p = (mp_machine_spi_p_t*)mp_proto_get(QSTR_protocol_spi, s); - spi_p->transfer(s, len, src, dest); -} - -STATIC mp_obj_t mp_machine_spi_read(size_t n_args, const mp_obj_t *args) { - vstr_t vstr; - vstr_init_len(&vstr, mp_obj_get_int(args[1])); - memset(vstr.buf, n_args == 3 ? mp_obj_get_int(args[2]) : 0, vstr.len); - mp_machine_spi_transfer(args[0], vstr.len, vstr.buf, vstr.buf); - return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr); -} -MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_machine_spi_read_obj, 2, 3, mp_machine_spi_read); - -STATIC mp_obj_t mp_machine_spi_readinto(size_t n_args, const mp_obj_t *args) { - mp_buffer_info_t bufinfo; - mp_get_buffer_raise(args[1], &bufinfo, MP_BUFFER_WRITE); - memset(bufinfo.buf, n_args == 3 ? mp_obj_get_int(args[2]) : 0, bufinfo.len); - mp_machine_spi_transfer(args[0], bufinfo.len, bufinfo.buf, bufinfo.buf); - return mp_const_none; -} -MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_machine_spi_readinto_obj, 2, 3, mp_machine_spi_readinto); - -STATIC mp_obj_t mp_machine_spi_write(mp_obj_t self, mp_obj_t wr_buf) { - mp_buffer_info_t src; - mp_get_buffer_raise(wr_buf, &src, MP_BUFFER_READ); - mp_machine_spi_transfer(self, src.len, (const uint8_t*)src.buf, NULL); - return mp_const_none; -} -MP_DEFINE_CONST_FUN_OBJ_2(mp_machine_spi_write_obj, mp_machine_spi_write); - -STATIC mp_obj_t mp_machine_spi_write_readinto(mp_obj_t self, mp_obj_t wr_buf, mp_obj_t rd_buf) { - mp_buffer_info_t src; - mp_get_buffer_raise(wr_buf, &src, MP_BUFFER_READ); - mp_buffer_info_t dest; - mp_get_buffer_raise(rd_buf, &dest, MP_BUFFER_WRITE); - if (src.len != dest.len) { - mp_raise_ValueError(translate("buffers must be the same length")); - } - mp_machine_spi_transfer(self, src.len, src.buf, dest.buf); - return mp_const_none; -} -MP_DEFINE_CONST_FUN_OBJ_3(mp_machine_spi_write_readinto_obj, mp_machine_spi_write_readinto); - -STATIC const mp_rom_map_elem_t machine_spi_locals_dict_table[] = { - { MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_spi_init_obj) }, - { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&machine_spi_deinit_obj) }, - { MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_machine_spi_read_obj) }, - { MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_machine_spi_readinto_obj) }, - { MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_machine_spi_write_obj) }, - { MP_ROM_QSTR(MP_QSTR_write_readinto), MP_ROM_PTR(&mp_machine_spi_write_readinto_obj) }, - - { MP_ROM_QSTR(MP_QSTR_MSB), MP_ROM_INT(MICROPY_PY_MACHINE_SPI_MSB) }, - { MP_ROM_QSTR(MP_QSTR_LSB), MP_ROM_INT(MICROPY_PY_MACHINE_SPI_LSB) }, -}; - -MP_DEFINE_CONST_DICT(mp_machine_spi_locals_dict, machine_spi_locals_dict_table); - -/******************************************************************************/ -// Implementation of soft SPI - -STATIC uint32_t baudrate_from_delay_half(uint32_t delay_half) { - #ifdef MICROPY_HW_SOFTSPI_MIN_DELAY - if (delay_half == MICROPY_HW_SOFTSPI_MIN_DELAY) { - return MICROPY_HW_SOFTSPI_MAX_BAUDRATE; - } else - #endif - { - return 500000 / delay_half; - } -} - -STATIC uint32_t baudrate_to_delay_half(uint32_t baudrate) { - #ifdef MICROPY_HW_SOFTSPI_MIN_DELAY - if (baudrate >= MICROPY_HW_SOFTSPI_MAX_BAUDRATE) { - return MICROPY_HW_SOFTSPI_MIN_DELAY; - } else - #endif - { - uint32_t delay_half = 500000 / baudrate; - // round delay_half up so that: actual_baudrate <= requested_baudrate - if (500000 % baudrate != 0) { - delay_half += 1; - } - return delay_half; - } -} - -STATIC void mp_machine_soft_spi_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) { - mp_machine_soft_spi_obj_t *self = MP_OBJ_TO_PTR(self_in); - mp_printf(print, "SoftSPI(baudrate=%u, polarity=%u, phase=%u," - " sck=" MP_HAL_PIN_FMT ", mosi=" MP_HAL_PIN_FMT ", miso=" MP_HAL_PIN_FMT ")", - baudrate_from_delay_half(self->spi.delay_half), self->spi.polarity, self->spi.phase, - mp_hal_pin_name(self->spi.sck), mp_hal_pin_name(self->spi.mosi), mp_hal_pin_name(self->spi.miso)); -} - -STATIC mp_obj_t mp_machine_soft_spi_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *all_args, mp_map_t *kw_args) { - enum { ARG_baudrate, ARG_polarity, ARG_phase, ARG_bits, ARG_firstbit, ARG_sck, ARG_mosi, ARG_miso }; - static const mp_arg_t allowed_args[] = { - { MP_QSTR_baudrate, MP_ARG_INT, {.u_int = 500000} }, - { MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} }, - { MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} }, - { MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 8} }, - { MP_QSTR_firstbit, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = MICROPY_PY_MACHINE_SPI_MSB} }, - { MP_QSTR_sck, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} }, - { MP_QSTR_mosi, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} }, - { MP_QSTR_miso, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} }, - }; - mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)]; - mp_arg_parse_all(n_args, all_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args); - - // create new object - mp_machine_soft_spi_obj_t *self = m_new_obj(mp_machine_soft_spi_obj_t); - self->base.type = &mp_machine_soft_spi_type; - - // set parameters - self->spi.delay_half = baudrate_to_delay_half(args[ARG_baudrate].u_int); - self->spi.polarity = args[ARG_polarity].u_int; - self->spi.phase = args[ARG_phase].u_int; - if (args[ARG_bits].u_int != 8) { - mp_raise_ValueError(translate("bits must be 8")); - } - if (args[ARG_firstbit].u_int != MICROPY_PY_MACHINE_SPI_MSB) { - mp_raise_ValueError(translate("firstbit must be MSB")); - } - if (args[ARG_sck].u_obj == MP_OBJ_NULL - || args[ARG_mosi].u_obj == MP_OBJ_NULL - || args[ARG_miso].u_obj == MP_OBJ_NULL) { - mp_raise_ValueError(translate("must specify all of sck/mosi/miso")); - } - self->spi.sck = mp_hal_get_pin_obj(args[ARG_sck].u_obj); - self->spi.mosi = mp_hal_get_pin_obj(args[ARG_mosi].u_obj); - self->spi.miso = mp_hal_get_pin_obj(args[ARG_miso].u_obj); - - // configure bus - mp_soft_spi_ioctl(&self->spi, MP_SPI_IOCTL_INIT); - - return MP_OBJ_FROM_PTR(self); -} - -STATIC void mp_machine_soft_spi_init(mp_obj_base_t *self_in, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) { - mp_machine_soft_spi_obj_t *self = (mp_machine_soft_spi_obj_t*)self_in; - - enum { ARG_baudrate, ARG_polarity, ARG_phase, ARG_sck, ARG_mosi, ARG_miso }; - static const mp_arg_t allowed_args[] = { - { MP_QSTR_baudrate, MP_ARG_INT, {.u_int = -1} }, - { MP_QSTR_polarity, MP_ARG_INT, {.u_int = -1} }, - { MP_QSTR_phase, MP_ARG_INT, {.u_int = -1} }, - { MP_QSTR_sck, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} }, - { MP_QSTR_mosi, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} }, - { MP_QSTR_miso, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} }, - }; - mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)]; - mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args); - - if (args[ARG_baudrate].u_int != -1) { - self->spi.delay_half = baudrate_to_delay_half(args[ARG_baudrate].u_int); - } - if (args[ARG_polarity].u_int != -1) { - self->spi.polarity = args[ARG_polarity].u_int; - } - if (args[ARG_phase].u_int != -1) { - self->spi.phase = args[ARG_phase].u_int; - } - if (args[ARG_sck].u_obj != MP_OBJ_NULL) { - self->spi.sck = mp_hal_get_pin_obj(args[ARG_sck].u_obj); - } - if (args[ARG_mosi].u_obj != MP_OBJ_NULL) { - self->spi.mosi = mp_hal_get_pin_obj(args[ARG_mosi].u_obj); - } - if (args[ARG_miso].u_obj != MP_OBJ_NULL) { - self->spi.miso = mp_hal_get_pin_obj(args[ARG_miso].u_obj); - } - - // configure bus - mp_soft_spi_ioctl(&self->spi, MP_SPI_IOCTL_INIT); -} - -STATIC void mp_machine_soft_spi_transfer(mp_obj_base_t *self_in, size_t len, const uint8_t *src, uint8_t *dest) { - mp_machine_soft_spi_obj_t *self = (mp_machine_soft_spi_obj_t*)self_in; - mp_soft_spi_transfer(&self->spi, len, src, dest); -} - -const mp_machine_spi_p_t mp_machine_soft_spi_p = { - MP_PROTO_IMPLEMENT(MP_QSTR_protocol_spi) - .init = mp_machine_soft_spi_init, - .deinit = NULL, - .transfer = mp_machine_soft_spi_transfer, -}; - -const mp_obj_type_t mp_machine_soft_spi_type = { - { &mp_type_type }, - .name = MP_QSTR_SoftSPI, - .print = mp_machine_soft_spi_print, - .make_new = mp_machine_spi_make_new, // delegate to master constructor - .protocol = &mp_machine_soft_spi_p, - .locals_dict = (mp_obj_dict_t*)&mp_machine_spi_locals_dict, -}; - -#endif // MICROPY_PY_MACHINE_SPI |