From d7eec2032e5cdfe67cb6b0e09b414aa0c7a06bc1 Mon Sep 17 00:00:00 2001 From: Glenn Ruben Bakke Date: Wed, 11 Jan 2017 16:49:55 +0100 Subject: [PATCH] nrf5/i2c: Adding files for hardware i2c machine module and adding config param in mpconfigport to disable by default. --- nrf5/i2c.c | 138 ++++++++++++++++++++++++++++++++++++++++++++ nrf5/i2c.h | 36 ++++++++++++ nrf5/mpconfigport.h | 3 + 3 files changed, 177 insertions(+) create mode 100644 nrf5/i2c.c create mode 100644 nrf5/i2c.h diff --git a/nrf5/i2c.c b/nrf5/i2c.c new file mode 100644 index 0000000000..54d42e5fc3 --- /dev/null +++ b/nrf5/i2c.c @@ -0,0 +1,138 @@ +/* + * This file is part of the Micro Python project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2017 Glenn Ruben Bakke + * + * 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 +#include + +#include "py/nlr.h" +#include "py/runtime.h" +#include "py/mphal.h" +#include "i2c.h" +#include "hal_twi.h" + +#if MICROPY_PY_MACHINE_HW_I2C + +typedef struct _machine_i2c_obj_t { + mp_obj_base_t base; + TWI_HandleTypeDef *i2c; +} machine_i2c_obj_t; + +TWI_HandleTypeDef I2CHandle0 = {.instance = NULL, .id = 0}; +TWI_HandleTypeDef I2CHandle1 = {.instance = NULL, .id = 1}; + +STATIC const machine_i2c_obj_t machine_i2c_obj[] = { + {{&machine_i2c_type}, &I2CHandle0}, + {{&machine_i2c_type}, &I2CHandle1}, +}; + +void i2c_init0(void) { + // reset the I2C handles + memset(&I2CHandle0, 0, sizeof(TWI_HandleTypeDef)); + I2CHandle0.instance = TWI_BASE(0); + memset(&I2CHandle1, 0, sizeof(TWI_HandleTypeDef)); + I2CHandle0.instance = TWI_BASE(1); +} + +STATIC int i2c_find(mp_obj_t id) { + // given an integer id + int i2c_id = mp_obj_get_int(id); + if (i2c_id >= 0 && i2c_id <= MP_ARRAY_SIZE(machine_i2c_obj) + && machine_i2c_obj[i2c_id].i2c != NULL) { + return i2c_id; + } + nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, + "I2C(%d) does not exist", i2c_id)); +} + +STATIC void i2c_print(const mp_print_t *print, mp_obj_t o, mp_print_kind_t kind) { + machine_i2c_obj_t *self = o; + mp_printf(print, "I2C(%u)", self->i2c->id); +} + +/******************************************************************************/ +/* MicroPython bindings for machine API */ + +// for make_new +enum { + ARG_NEW_id, +}; + +STATIC mp_obj_t machine_i2c_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) { + static const mp_arg_t allowed_args[] = { + { MP_QSTR_id, MP_ARG_OBJ, {.u_obj = MP_OBJ_NEW_SMALL_INT(-1)} }, + }; + + // parse args + mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)]; + mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args); + + if (args[ARG_NEW_id].u_obj == MP_OBJ_NEW_SMALL_INT(-1)) { + // index -1 does not exist + return mp_const_none; + // TODO: raise exception + } + + // get static peripheral object + int i2c_id = i2c_find(args[ARG_NEW_id].u_obj); + const machine_i2c_obj_t *self = &machine_i2c_obj[i2c_id]; + + hal_twi_init(self->i2c->instance, &self->i2c->init); + + return MP_OBJ_FROM_PTR(self); +} + +STATIC const mp_map_elem_t pyb_i2c_locals_dict_table[] = { + // instance methods +#if 0 + { MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&machine_i2c_init_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_deinit), (mp_obj_t)&machine_i2c_deinit_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_is_ready), (mp_obj_t)&machine_i2c_is_ready_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_scan), (mp_obj_t)&machine_i2c_scan_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_send), (mp_obj_t)&machine_i2c_send_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_recv), (mp_obj_t)&machine_i2c_recv_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_mem_read), (mp_obj_t)&machine_i2c_mem_read_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_mem_write), (mp_obj_t)&machine_i2c_mem_write_obj }, +#endif + // class constants + /// \constant MASTER - for initialising the bus to master mode + /// \constant SLAVE - for initialising the bus to slave mode + { MP_OBJ_NEW_QSTR(MP_QSTR_MASTER), MP_OBJ_NEW_SMALL_INT(HAL_TWI_MASTER) }, + { MP_OBJ_NEW_QSTR(MP_QSTR_SLAVE), MP_OBJ_NEW_SMALL_INT(HAL_TWI_SLAVE) }, +}; + +STATIC MP_DEFINE_CONST_DICT(pyb_i2c_locals_dict, pyb_i2c_locals_dict_table); + +const mp_obj_type_t machine_i2c_type = { + { &mp_type_type }, + .name = MP_QSTR_I2C, + .print = i2c_print, + .make_new = machine_i2c_make_new, +#if 0 + .locals_dict = (mp_obj_t)&machine_i2c_locals_dict +#endif +}; + +#endif // MICROPY_PY_MACHINE_HW_I2C diff --git a/nrf5/i2c.h b/nrf5/i2c.h new file mode 100644 index 0000000000..46a93a8a63 --- /dev/null +++ b/nrf5/i2c.h @@ -0,0 +1,36 @@ +/* + * This file is part of the Micro Python project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2017 Glenn Ruben Bakke + * + * 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. + */ + +#ifndef I2C_H__ +#define I2C_H__ + +#include "hal_twi.h" + +extern const mp_obj_type_t machine_i2c_type; + +void i2c_init0(void); + +#endif // I2C_H__ diff --git a/nrf5/mpconfigport.h b/nrf5/mpconfigport.h index d37ed6b0be..a6f55d9086 100644 --- a/nrf5/mpconfigport.h +++ b/nrf5/mpconfigport.h @@ -104,6 +104,9 @@ #define MICROPY_PY_MACHINE_SPI_MIN_DELAY (0) #define MICROPY_PY_FRAMEBUF (0) +#ifndef MICROPY_PY_MACHINE_HW_I2C +#define MICROPY_PY_MACHINE_HW_I2C (0) +#endif #ifndef MICROPY_PY_MACHINE_SPI #define MICROPY_PY_MACHINE_SPI (1)