/* * This file is part of the Micro Python project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries * Copyright (c) 2019 Elvis Pfutzenreuter * * 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 "lib/utils/context_manager_helpers.h" #include "py/objproperty.h" #include "py/runtime.h" #include "py/runtime0.h" #include "shared-bindings/microcontroller/Pin.h" #include "shared-bindings/ps2io/Ps2.h" #include "shared-bindings/util.h" #include "supervisor/shared/translate.h" //| .. currentmodule:: ps2io //| //| :class:`Ps2` -- Communicate with a PS/2 keyboard or mouse //| ========================================================= //| //| Ps2 implements the PS/2 keyboard/mouse serial protocol, used in //| legacy devices. It is similar to UART but there are only two //| lines (Data and Clock). PS/2 devices are 5V, so bidirectional //| level converters must be used to connect the I/O lines to pins //| of 3.3V boards. //| //| .. class:: Ps2(data_pin, clock_pin) //| //| Create a Ps2 object associated with the given pins. //| //| :param ~microcontroller.Pin data_pin: Pin tied to data wire. //| :param ~microcontroller.Pin clock_pin: Pin tied to clock wire. //| This pin must support interrupts. //| //| Read one byte from PS/2 keyboard and turn on Scroll Lock LED:: //| //| import ps2io //| import board //| //| kbd = ps2io.Ps2(board.D10, board.D11) //| //| while len(kbd) == 0: //| pass //| //| print(kbd.popleft()) //| print(kbd.sendcmd(0xed)) //| print(kbd.sendcmd(0x01)) //| STATIC mp_obj_t ps2io_ps2_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) { enum { ARG_datapin, ARG_clkpin }; static const mp_arg_t allowed_args[] = { { MP_QSTR_datapin, MP_ARG_REQUIRED | MP_ARG_OBJ }, { MP_QSTR_clkpin, MP_ARG_REQUIRED | MP_ARG_OBJ }, }; 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); const mcu_pin_obj_t* clkpin = validate_is_free_pin(args[ARG_clkpin].u_obj); const mcu_pin_obj_t* datapin = validate_is_free_pin(args[ARG_datapin].u_obj); ps2io_ps2_obj_t *self = m_new_obj(ps2io_ps2_obj_t); self->base.type = &ps2io_ps2_type; common_hal_ps2io_ps2_construct(self, datapin, clkpin); return MP_OBJ_FROM_PTR(self); } //| .. method:: deinit() //| //| Deinitialises the Ps2 and releases any hardware resources for reuse. //| STATIC mp_obj_t ps2io_ps2_deinit(mp_obj_t self_in) { ps2io_ps2_obj_t *self = MP_OBJ_TO_PTR(self_in); common_hal_ps2io_ps2_deinit(self); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_1(ps2io_ps2_deinit_obj, ps2io_ps2_deinit); STATIC void check_for_deinit(ps2io_ps2_obj_t *self) { if (common_hal_ps2io_ps2_deinited(self)) { raise_deinited_error(); } } //| .. method:: __enter__() //| //| No-op used by Context Managers. //| // Provided by context manager helper. //| .. method:: __exit__() //| //| Automatically deinitializes the hardware when exiting a context. See //| :ref:`lifetime-and-contextmanagers` for more info. //| STATIC mp_obj_t ps2io_ps2_obj___exit__(size_t n_args, const mp_obj_t *args) { (void)n_args; common_hal_ps2io_ps2_deinit(args[0]); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(ps2io_ps2___exit___obj, 4, 4, ps2io_ps2_obj___exit__); //| .. method:: popleft() //| //| Removes and returns the oldest received byte. When buffer //| is empty, raises an IndexError exception. //| STATIC mp_obj_t ps2io_ps2_obj_popleft(mp_obj_t self_in) { ps2io_ps2_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); int b = common_hal_ps2io_ps2_popleft(self); if (b < 0) { mp_raise_IndexError(translate("Pop from an empty Ps2 buffer")); } return MP_OBJ_NEW_SMALL_INT(b); } MP_DEFINE_CONST_FUN_OBJ_1(ps2io_ps2_popleft_obj, ps2io_ps2_obj_popleft); //| .. method:: sendcmd(byte) //| //| Sends a command byte to PS/2. Returns the response byte, typically //| the general ack value (0xFA). Some commands return additional data //| which is available through :py:func:`popleft()`. //| //| Raises a RuntimeError in case of failure. The root cause can be found //| by calling :py:func:`clear_errors()`. It is advisable to call //| :py:func:`clear_errors()` before :py:func:`sendcmd()` to flush any //| previous errors. //| //| :param int byte: byte value of the command //| STATIC mp_obj_t ps2io_ps2_obj_sendcmd(mp_obj_t self_in, mp_obj_t ob) { ps2io_ps2_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); mp_int_t cmd = mp_obj_get_int(ob) & 0xff; int resp = common_hal_ps2io_ps2_sendcmd(self, cmd); if (resp < 0) { mp_raise_RuntimeError(translate("Failed sending command.")); } return MP_OBJ_NEW_SMALL_INT(resp); } MP_DEFINE_CONST_FUN_OBJ_2(ps2io_ps2_sendcmd_obj, ps2io_ps2_obj_sendcmd); //| .. method:: clear_errors() //| //| Returns and clears a bitmap with latest recorded communication errors. //| //| Reception errors (arise asynchronously, as data is received): //| //| 0x01: start bit not 0 //| //| 0x02: timeout //| //| 0x04: parity bit error //| //| 0x08: stop bit not 1 //| //| 0x10: buffer overflow, newest data discarded //| //| Transmission errors (can only arise in the course of sendcmd()): //| //| 0x100: clock pin didn't go to LO in time //| //| 0x200: clock pin didn't go to HI in time //| //| 0x400: data pin didn't ACK //| //| 0x800: clock pin didn't ACK //| //| 0x1000: device didn't respond to RTS //| //| 0x2000: device didn't send a response byte in time //| STATIC mp_obj_t ps2io_ps2_obj_clear_errors(mp_obj_t self_in) { ps2io_ps2_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); return MP_OBJ_NEW_SMALL_INT(common_hal_ps2io_ps2_clear_errors(self)); } MP_DEFINE_CONST_FUN_OBJ_1(ps2io_ps2_clear_errors_obj, ps2io_ps2_obj_clear_errors); //| .. method:: __len__() //| //| Returns the number of received bytes in buffer, available //| to :py:func:`popleft()`. //| STATIC mp_obj_t ps2_unary_op(mp_unary_op_t op, mp_obj_t self_in) { ps2io_ps2_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); uint16_t len = common_hal_ps2io_ps2_get_len(self); switch (op) { case MP_UNARY_OP_BOOL: return mp_obj_new_bool(len != 0); case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT(len); default: return MP_OBJ_NULL; // op not supported } } STATIC const mp_rom_map_elem_t ps2io_ps2_locals_dict_table[] = { // Methods { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&ps2io_ps2_deinit_obj) }, { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) }, { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&ps2io_ps2___exit___obj) }, { MP_ROM_QSTR(MP_QSTR_popleft), MP_ROM_PTR(&ps2io_ps2_popleft_obj) }, { MP_ROM_QSTR(MP_QSTR_sendcmd), MP_ROM_PTR(&ps2io_ps2_sendcmd_obj) }, { MP_ROM_QSTR(MP_QSTR_clear_errors), MP_ROM_PTR(&ps2io_ps2_clear_errors_obj) }, }; STATIC MP_DEFINE_CONST_DICT(ps2io_ps2_locals_dict, ps2io_ps2_locals_dict_table); const mp_obj_type_t ps2io_ps2_type = { { &mp_type_type }, .name = MP_QSTR_Ps2, .make_new = ps2io_ps2_make_new, .unary_op = ps2_unary_op, .locals_dict = (mp_obj_dict_t*)&ps2io_ps2_locals_dict, };