/* * This file is part of the MicroPython project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2013, 2014, 2015 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 #include #include #include "etshal.h" #include "c_types.h" #include "user_interface.h" #include "gpio.h" #include "py/runtime.h" #include "py/gc.h" #include "py/mphal.h" #include "extmod/virtpin.h" #include "ets_alt_task.h" #include "modmachine.h" #define GET_TRIGGER(phys_port) \ GPIO_PIN_INT_TYPE_GET(GPIO_REG_READ(GPIO_PIN_ADDR(phys_port))) #define SET_TRIGGER(phys_port, trig) \ (GPIO_REG_WRITE(GPIO_PIN_ADDR(phys_port), \ (GPIO_REG_READ(GPIO_PIN_ADDR(phys_port)) & ~GPIO_PIN_INT_TYPE_MASK) \ | GPIO_PIN_INT_TYPE_SET(trig))) \ #define GPIO_MODE_INPUT (0) #define GPIO_MODE_OUTPUT (1) #define GPIO_MODE_OPEN_DRAIN (2) // synthesised #define GPIO_PULL_NONE (0) #define GPIO_PULL_UP (1) // Removed in SDK 1.1.0 // #define GPIO_PULL_DOWN (2) typedef struct _pin_irq_obj_t { mp_obj_base_t base; uint16_t phys_port; } pin_irq_obj_t; const pyb_pin_obj_t pyb_pin_obj[16 + 1] = { {{&pyb_pin_type}, 0, FUNC_GPIO0, PERIPHS_IO_MUX_GPIO0_U}, {{&pyb_pin_type}, 1, FUNC_GPIO1, PERIPHS_IO_MUX_U0TXD_U}, {{&pyb_pin_type}, 2, FUNC_GPIO2, PERIPHS_IO_MUX_GPIO2_U}, {{&pyb_pin_type}, 3, FUNC_GPIO3, PERIPHS_IO_MUX_U0RXD_U}, {{&pyb_pin_type}, 4, FUNC_GPIO4, PERIPHS_IO_MUX_GPIO4_U}, {{&pyb_pin_type}, 5, FUNC_GPIO5, PERIPHS_IO_MUX_GPIO5_U}, {{NULL}, 0, 0, 0}, {{NULL}, 0, 0, 0}, {{NULL}, 0, 0, 0}, {{&pyb_pin_type}, 9, FUNC_GPIO9, PERIPHS_IO_MUX_SD_DATA2_U}, {{&pyb_pin_type}, 10, FUNC_GPIO10, PERIPHS_IO_MUX_SD_DATA3_U}, {{NULL}, 0, 0, 0}, {{&pyb_pin_type}, 12, FUNC_GPIO12, PERIPHS_IO_MUX_MTDI_U}, {{&pyb_pin_type}, 13, FUNC_GPIO13, PERIPHS_IO_MUX_MTCK_U}, {{&pyb_pin_type}, 14, FUNC_GPIO14, PERIPHS_IO_MUX_MTMS_U}, {{&pyb_pin_type}, 15, FUNC_GPIO15, PERIPHS_IO_MUX_MTDO_U}, // GPIO16 is special, belongs to different register set, and // otherwise handled specially. {{&pyb_pin_type}, 16, -1, -1}, }; STATIC uint8_t pin_mode[16 + 1]; // forward declaration STATIC const pin_irq_obj_t pin_irq_obj[16]; // whether the irq is hard or soft STATIC bool pin_irq_is_hard[16]; void pin_init0(void) { ETS_GPIO_INTR_DISABLE(); ETS_GPIO_INTR_ATTACH(pin_intr_handler_iram, NULL); // disable all interrupts memset(&MP_STATE_PORT(pin_irq_handler)[0], 0, 16 * sizeof(mp_obj_t)); memset(pin_irq_is_hard, 0, sizeof(pin_irq_is_hard)); for (int p = 0; p < 16; ++p) { GPIO_REG_WRITE(GPIO_STATUS_W1TC_ADDRESS, 1 << p); SET_TRIGGER(p, 0); } ETS_GPIO_INTR_ENABLE(); } void pin_intr_handler(uint32_t status) { status &= 0xffff; for (int p = 0; status; ++p, status >>= 1) { if (status & 1) { mp_obj_t handler = MP_STATE_PORT(pin_irq_handler)[p]; if (handler != MP_OBJ_NULL) { if (pin_irq_is_hard[p]) { int orig_ets_loop_iter_disable = ets_loop_iter_disable; ets_loop_iter_disable = 1; mp_sched_lock(); gc_lock(); mp_call_function_1_protected(handler, MP_OBJ_FROM_PTR(&pyb_pin_obj[p])); gc_unlock(); mp_sched_unlock(); ets_loop_iter_disable = orig_ets_loop_iter_disable; } else { mp_sched_schedule(handler, MP_OBJ_FROM_PTR(&pyb_pin_obj[p])); } } } } } pyb_pin_obj_t *mp_obj_get_pin_obj(mp_obj_t pin_in) { if (mp_obj_get_type(pin_in) != &pyb_pin_type) { mp_raise_ValueError(MP_ERROR_TEXT("expecting a pin")); } pyb_pin_obj_t *self = pin_in; return self; } uint mp_obj_get_pin(mp_obj_t pin_in) { return mp_obj_get_pin_obj(pin_in)->phys_port; } void mp_hal_pin_input(mp_hal_pin_obj_t pin_id) { pin_mode[pin_id] = GPIO_MODE_INPUT; if (pin_id == 16) { WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) & 0xffffffbc) | 1); WRITE_PERI_REG(RTC_GPIO_CONF, READ_PERI_REG(RTC_GPIO_CONF) & ~1); WRITE_PERI_REG(RTC_GPIO_ENABLE, (READ_PERI_REG(RTC_GPIO_ENABLE) & ~1)); // input } else { const pyb_pin_obj_t *self = &pyb_pin_obj[pin_id]; PIN_FUNC_SELECT(self->periph, self->func); PIN_PULLUP_DIS(self->periph); gpio_output_set(0, 0, 0, 1 << self->phys_port); } } void mp_hal_pin_output(mp_hal_pin_obj_t pin_id) { pin_mode[pin_id] = GPIO_MODE_OUTPUT; if (pin_id == 16) { WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) & 0xffffffbc) | 1); WRITE_PERI_REG(RTC_GPIO_CONF, READ_PERI_REG(RTC_GPIO_CONF) & ~1); WRITE_PERI_REG(RTC_GPIO_ENABLE, (READ_PERI_REG(RTC_GPIO_ENABLE) & ~1) | 1); // output } else { const pyb_pin_obj_t *self = &pyb_pin_obj[pin_id]; PIN_FUNC_SELECT(self->periph, self->func); PIN_PULLUP_DIS(self->periph); gpio_output_set(0, 0, 1 << self->phys_port, 0); } } void mp_hal_pin_open_drain(mp_hal_pin_obj_t pin_id) { const pyb_pin_obj_t *pin = &pyb_pin_obj[pin_id]; if (pin->phys_port == 16) { // configure GPIO16 as input with output register holding 0 WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) & 0xffffffbc) | 1); WRITE_PERI_REG(RTC_GPIO_CONF, READ_PERI_REG(RTC_GPIO_CONF) & ~1); WRITE_PERI_REG(RTC_GPIO_ENABLE, (READ_PERI_REG(RTC_GPIO_ENABLE) & ~1)); // input WRITE_PERI_REG(RTC_GPIO_OUT, (READ_PERI_REG(RTC_GPIO_OUT) & ~1)); // out=0 return; } ETS_GPIO_INTR_DISABLE(); PIN_FUNC_SELECT(pin->periph, pin->func); GPIO_REG_WRITE(GPIO_PIN_ADDR(GPIO_ID_PIN(pin->phys_port)), GPIO_REG_READ(GPIO_PIN_ADDR(GPIO_ID_PIN(pin->phys_port))) | GPIO_PIN_PAD_DRIVER_SET(GPIO_PAD_DRIVER_ENABLE)); // open drain GPIO_REG_WRITE(GPIO_ENABLE_ADDRESS, GPIO_REG_READ(GPIO_ENABLE_ADDRESS) | (1 << pin->phys_port)); ETS_GPIO_INTR_ENABLE(); } int pin_get(uint pin) { if (pin == 16) { return READ_PERI_REG(RTC_GPIO_IN_DATA) & 1; } return GPIO_INPUT_GET(pin); } void pin_set(uint pin, int value) { if (pin == 16) { int out_en = (pin_mode[pin] == GPIO_MODE_OUTPUT); WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) & 0xffffffbc) | 1); WRITE_PERI_REG(RTC_GPIO_CONF, READ_PERI_REG(RTC_GPIO_CONF) & ~1); WRITE_PERI_REG(RTC_GPIO_ENABLE, (READ_PERI_REG(RTC_GPIO_ENABLE) & ~1) | out_en); WRITE_PERI_REG(RTC_GPIO_OUT, (READ_PERI_REG(RTC_GPIO_OUT) & ~1) | value); return; } uint32_t enable = 0; uint32_t disable = 0; switch (pin_mode[pin]) { case GPIO_MODE_INPUT: value = -1; disable = 1; break; case GPIO_MODE_OUTPUT: enable = 1; break; case GPIO_MODE_OPEN_DRAIN: if (value == -1) { return; } else if (value == 0) { enable = 1; } else { value = -1; disable = 1; } break; } enable <<= pin; disable <<= pin; if (value == -1) { gpio_output_set(0, 0, enable, disable); } else { gpio_output_set(value << pin, (1 - value) << pin, enable, disable); } } STATIC void pyb_pin_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) { pyb_pin_obj_t *self = self_in; // pin name mp_printf(print, "Pin(%u)", self->phys_port); } // pin.init(mode, pull=None, *, value) STATIC mp_obj_t pyb_pin_obj_init_helper(pyb_pin_obj_t *self, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) { enum { ARG_mode, ARG_pull, ARG_value }; static const mp_arg_t allowed_args[] = { { MP_QSTR_mode, MP_ARG_REQUIRED | MP_ARG_INT }, { MP_QSTR_pull, MP_ARG_OBJ, {.u_obj = mp_const_none}}, { MP_QSTR_value, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL}}, }; // parse args 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); // get io mode uint mode = args[ARG_mode].u_int; // get pull mode uint pull = GPIO_PULL_NONE; if (args[ARG_pull].u_obj != mp_const_none) { pull = mp_obj_get_int(args[ARG_pull].u_obj); } // get initial value int value; if (args[ARG_value].u_obj == MP_OBJ_NULL) { value = -1; } else { value = mp_obj_is_true(args[ARG_value].u_obj); } // save the mode pin_mode[self->phys_port] = mode; // configure the GPIO as requested if (self->phys_port == 16) { // only pull-down seems to be supported by the hardware, and // we only expose pull-up behaviour in software if (pull != GPIO_PULL_NONE) { mp_raise_ValueError(MP_ERROR_TEXT("Pin(16) doesn't support pull")); } } else { PIN_FUNC_SELECT(self->periph, self->func); #if 0 // Removed in SDK 1.1.0 if ((pull & GPIO_PULL_DOWN) == 0) { PIN_PULLDWN_DIS(self->periph); } #endif if ((pull & GPIO_PULL_UP) == 0) { PIN_PULLUP_DIS(self->periph); } #if 0 if ((pull & GPIO_PULL_DOWN) != 0) { PIN_PULLDWN_EN(self->periph); } #endif if ((pull & GPIO_PULL_UP) != 0) { PIN_PULLUP_EN(self->periph); } } pin_set(self->phys_port, value); return mp_const_none; } // constructor(id, ...) mp_obj_t mp_pin_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) { mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true); // get the wanted pin object int wanted_pin = mp_obj_get_int(args[0]); pyb_pin_obj_t *pin = NULL; if (0 <= wanted_pin && wanted_pin < MP_ARRAY_SIZE(pyb_pin_obj)) { pin = (pyb_pin_obj_t *)&pyb_pin_obj[wanted_pin]; } if (pin == NULL || pin->base.type == NULL) { mp_raise_ValueError(MP_ERROR_TEXT("invalid pin")); } if (n_args > 1 || n_kw > 0) { // pin mode given, so configure this GPIO mp_map_t kw_args; mp_map_init_fixed_table(&kw_args, n_kw, args + n_args); pyb_pin_obj_init_helper(pin, n_args - 1, args + 1, &kw_args); } return (mp_obj_t)pin; } // fast method for getting/setting pin value STATIC mp_obj_t pyb_pin_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) { mp_arg_check_num(n_args, n_kw, 0, 1, false); pyb_pin_obj_t *self = self_in; if (n_args == 0) { // get pin return MP_OBJ_NEW_SMALL_INT(pin_get(self->phys_port)); } else { // set pin pin_set(self->phys_port, mp_obj_is_true(args[0])); return mp_const_none; } } // pin.init(mode, pull) STATIC mp_obj_t pyb_pin_obj_init(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) { return pyb_pin_obj_init_helper(args[0], n_args - 1, args + 1, kw_args); } MP_DEFINE_CONST_FUN_OBJ_KW(pyb_pin_init_obj, 1, pyb_pin_obj_init); // pin.value([value]) STATIC mp_obj_t pyb_pin_value(size_t n_args, const mp_obj_t *args) { return pyb_pin_call(args[0], n_args - 1, 0, args + 1); } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_pin_value_obj, 1, 2, pyb_pin_value); STATIC mp_obj_t pyb_pin_off(mp_obj_t self_in) { pyb_pin_obj_t *self = self_in; pin_set(self->phys_port, 0); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_pin_off_obj, pyb_pin_off); STATIC mp_obj_t pyb_pin_on(mp_obj_t self_in) { pyb_pin_obj_t *self = self_in; pin_set(self->phys_port, 1); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_pin_on_obj, pyb_pin_on); // pin.irq(handler=None, trigger=IRQ_FALLING|IRQ_RISING, hard=False) STATIC mp_obj_t pyb_pin_irq(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) { enum { ARG_handler, ARG_trigger, ARG_hard }; static const mp_arg_t allowed_args[] = { { MP_QSTR_handler, MP_ARG_OBJ, {.u_obj = mp_const_none} }, { MP_QSTR_trigger, MP_ARG_INT, {.u_int = GPIO_PIN_INTR_POSEDGE | GPIO_PIN_INTR_NEGEDGE} }, { MP_QSTR_hard, MP_ARG_BOOL, {.u_bool = false} }, }; pyb_pin_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]); mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)]; mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args); if (self->phys_port >= 16) { mp_raise_msg(&mp_type_OSError, MP_ERROR_TEXT("pin does not have IRQ capabilities")); } if (n_args > 1 || kw_args->used != 0) { // configure irq mp_obj_t handler = args[ARG_handler].u_obj; uint32_t trigger = args[ARG_trigger].u_int; if (handler == mp_const_none) { handler = MP_OBJ_NULL; trigger = 0; } ETS_GPIO_INTR_DISABLE(); MP_STATE_PORT(pin_irq_handler)[self->phys_port] = handler; pin_irq_is_hard[self->phys_port] = args[ARG_hard].u_bool; SET_TRIGGER(self->phys_port, trigger); GPIO_REG_WRITE(GPIO_STATUS_W1TC_ADDRESS, 1 << self->phys_port); ETS_GPIO_INTR_ENABLE(); } // return the irq object return MP_OBJ_FROM_PTR(&pin_irq_obj[self->phys_port]); } STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_pin_irq_obj, 1, pyb_pin_irq); STATIC mp_uint_t pin_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode); STATIC mp_uint_t pin_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode) { (void)errcode; pyb_pin_obj_t *self = self_in; switch (request) { case MP_PIN_READ: { return pin_get(self->phys_port); } case MP_PIN_WRITE: { pin_set(self->phys_port, arg); return 0; } } return -1; } STATIC const mp_rom_map_elem_t pyb_pin_locals_dict_table[] = { // instance methods { MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&pyb_pin_init_obj) }, { MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&pyb_pin_value_obj) }, { MP_ROM_QSTR(MP_QSTR_off), MP_ROM_PTR(&pyb_pin_off_obj) }, { MP_ROM_QSTR(MP_QSTR_on), MP_ROM_PTR(&pyb_pin_on_obj) }, { MP_ROM_QSTR(MP_QSTR_irq), MP_ROM_PTR(&pyb_pin_irq_obj) }, // class constants { MP_ROM_QSTR(MP_QSTR_IN), MP_ROM_INT(GPIO_MODE_INPUT) }, { MP_ROM_QSTR(MP_QSTR_OUT), MP_ROM_INT(GPIO_MODE_OUTPUT) }, { MP_ROM_QSTR(MP_QSTR_OPEN_DRAIN), MP_ROM_INT(GPIO_MODE_OPEN_DRAIN) }, { MP_ROM_QSTR(MP_QSTR_PULL_UP), MP_ROM_INT(GPIO_PULL_UP) }, // { MP_ROM_QSTR(MP_QSTR_PULL_DOWN), MP_ROM_INT(GPIO_PULL_DOWN) }, // IRQ triggers, can be or'd together { MP_ROM_QSTR(MP_QSTR_IRQ_RISING), MP_ROM_INT(GPIO_PIN_INTR_POSEDGE) }, { MP_ROM_QSTR(MP_QSTR_IRQ_FALLING), MP_ROM_INT(GPIO_PIN_INTR_NEGEDGE) }, }; STATIC MP_DEFINE_CONST_DICT(pyb_pin_locals_dict, pyb_pin_locals_dict_table); STATIC const mp_pin_p_t pin_pin_p = { .ioctl = pin_ioctl, }; const mp_obj_type_t pyb_pin_type = { { &mp_type_type }, .name = MP_QSTR_Pin, .print = pyb_pin_print, .make_new = mp_pin_make_new, .call = pyb_pin_call, .protocol = &pin_pin_p, .locals_dict = (mp_obj_dict_t *)&pyb_pin_locals_dict, }; /******************************************************************************/ // Pin IRQ object STATIC const mp_obj_type_t pin_irq_type; STATIC const pin_irq_obj_t pin_irq_obj[16] = { {{&pin_irq_type}, 0}, {{&pin_irq_type}, 1}, {{&pin_irq_type}, 2}, {{&pin_irq_type}, 3}, {{&pin_irq_type}, 4}, {{&pin_irq_type}, 5}, {{&pin_irq_type}, 6}, {{&pin_irq_type}, 7}, {{&pin_irq_type}, 8}, {{&pin_irq_type}, 9}, {{&pin_irq_type}, 10}, {{&pin_irq_type}, 11}, {{&pin_irq_type}, 12}, {{&pin_irq_type}, 13}, {{&pin_irq_type}, 14}, {{&pin_irq_type}, 15}, }; STATIC mp_obj_t pin_irq_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) { pin_irq_obj_t *self = self_in; mp_arg_check_num(n_args, n_kw, 0, 0, false); pin_intr_handler(1 << self->phys_port); return mp_const_none; } STATIC mp_obj_t pin_irq_trigger(size_t n_args, const mp_obj_t *args) { pin_irq_obj_t *self = args[0]; uint32_t orig_trig = GET_TRIGGER(self->phys_port); if (n_args == 2) { // set trigger SET_TRIGGER(self->phys_port, mp_obj_get_int(args[1])); } // return original trigger value return MP_OBJ_NEW_SMALL_INT(orig_trig); } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pin_irq_trigger_obj, 1, 2, pin_irq_trigger); STATIC const mp_rom_map_elem_t pin_irq_locals_dict_table[] = { { MP_ROM_QSTR(MP_QSTR_trigger), MP_ROM_PTR(&pin_irq_trigger_obj) }, }; STATIC MP_DEFINE_CONST_DICT(pin_irq_locals_dict, pin_irq_locals_dict_table); STATIC const mp_obj_type_t pin_irq_type = { { &mp_type_type }, .name = MP_QSTR_IRQ, .call = pin_irq_call, .locals_dict = (mp_obj_dict_t *)&pin_irq_locals_dict, };