diff options
Diffstat (limited to 'drivers/esp-hosted/esp_hosted_hal.c')
| -rw-r--r-- | drivers/esp-hosted/esp_hosted_hal.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/drivers/esp-hosted/esp_hosted_hal.c b/drivers/esp-hosted/esp_hosted_hal.c new file mode 100644 index 0000000000..d8e2e6ece4 --- /dev/null +++ b/drivers/esp-hosted/esp_hosted_hal.c @@ -0,0 +1,209 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2023 Arduino SA + * + * 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. + * + * ESP-Hosted WiFi HAL. + */ + +#include "py/mphal.h" + +#if MICROPY_PY_NETWORK_ESP_HOSTED + +#include <stdint.h> +#include <string.h> + +#include "py/runtime.h" +#include "modmachine.h" +#include "extmod/machine_spi.h" +#include "mpconfigboard.h" + +#include "esp_hosted_hal.h" +#include "esp_hosted_wifi.h" + +#ifndef MICROPY_HW_WIFI_IRQ +#define MICROPY_HW_WIFI_IRQ MICROPY_HW_WIFI_HANDSHAKE +#endif + +STATIC mp_obj_t esp_hosted_pin_irq_callback(mp_obj_t self_in) { + extern void mod_network_poll_events(void); + mod_network_poll_events(); + return mp_const_none; +} +STATIC MP_DEFINE_CONST_FUN_OBJ_1(esp_hosted_pin_irq_callback_obj, esp_hosted_pin_irq_callback); + +MP_WEAK int esp_hosted_hal_init(uint32_t mode) { + // Perform a hard reset and set pins to their defaults. + esp_hosted_hal_deinit(); + + if (mode == ESP_HOSTED_MODE_BT) { + // For Bluetooth mode, init is done. + return 0; + } + + mp_hal_pin_input(MICROPY_HW_WIFI_HANDSHAKE); + mp_hal_pin_input(MICROPY_HW_WIFI_DATAREADY); + + // Enable Pin-IRQ for the handshake PIN to call esp_hosted_wifi_poll() + mp_obj_t irq_rising_attr[2]; + mp_load_method_maybe((mp_obj_t)MICROPY_HW_WIFI_IRQ, MP_QSTR_IRQ_RISING, irq_rising_attr); + + if (irq_rising_attr[0] != MP_OBJ_NULL && irq_rising_attr[1] == MP_OBJ_NULL) { // value for IRQ rising found + mp_obj_t pin_args[] = { + NULL, // Method pointer + (mp_obj_t)MICROPY_HW_WIFI_IRQ, // Pin object + (mp_obj_t)&esp_hosted_pin_irq_callback_obj, // Callback function object + NULL, // The Rising edge value is set below. + mp_const_true, // Hard IRQ, since the actual polling is scheduled. + }; + pin_args[3] = irq_rising_attr[0]; + mp_load_method_maybe((mp_obj_t)MICROPY_HW_WIFI_IRQ, MP_QSTR_irq, pin_args); + if (pin_args[0] != MP_OBJ_NULL && pin_args[1] != MP_OBJ_NULL) { + mp_call_method_n_kw(3, 0, pin_args); + } + } + + // Initialize SPI. + mp_obj_t args[] = { + MP_OBJ_NEW_SMALL_INT(MICROPY_HW_WIFI_SPI_ID), + MP_OBJ_NEW_SMALL_INT(MICROPY_HW_WIFI_SPI_BAUDRATE), + MP_OBJ_NEW_QSTR(MP_QSTR_polarity), MP_OBJ_NEW_SMALL_INT(1), + }; + + MP_STATE_PORT(mp_wifi_spi) = + MP_OBJ_TYPE_GET_SLOT(&machine_spi_type, make_new)((mp_obj_t)&machine_spi_type, 2, 1, args); + + // SPI might change the direction/mode of CS pin, + // set it to GPIO again just in case. + mp_hal_pin_output(MICROPY_HW_WIFI_SPI_CS); + mp_hal_pin_write(MICROPY_HW_WIFI_SPI_CS, 1); + return 0; +} + +MP_WEAK int esp_hosted_hal_deinit(void) { + // Disable Pin-IRQ for the handshake PIN + mp_obj_t pin_args[] = { + NULL, // Method pointer + (mp_obj_t)MICROPY_HW_WIFI_IRQ, // Pin object + mp_const_none // Set to None + }; + mp_load_method_maybe((mp_obj_t)MICROPY_HW_WIFI_IRQ, MP_QSTR_irq, pin_args); + if (pin_args[0] && pin_args[1]) { + mp_call_method_n_kw(1, 0, pin_args); + } + + // Remove all network interfaces and reset wifi state. + esp_hosted_wifi_deinit(); + + mp_hal_pin_output(MICROPY_HW_ESP_HOSTED_GPIO0); + mp_hal_pin_output(MICROPY_HW_ESP_HOSTED_RESET); + + #ifndef MICROPY_HW_ESP_HOSTED_SHARED_PINS + mp_hal_pin_output(MICROPY_HW_WIFI_SPI_CS); + mp_hal_pin_write(MICROPY_HW_WIFI_SPI_CS, 1); + #endif + + // Perform a hard reset + mp_hal_pin_write(MICROPY_HW_ESP_HOSTED_GPIO0, 1); + mp_hal_pin_write(MICROPY_HW_ESP_HOSTED_RESET, 0); + mp_hal_delay_ms(100); + mp_hal_pin_write(MICROPY_HW_ESP_HOSTED_RESET, 1); + mp_hal_delay_ms(500); + + MP_STATE_PORT(mp_wifi_spi) = MP_OBJ_NULL; + return 0; +} + +MP_WEAK int esp_hosted_hal_atomic_enter(void) { + #if MICROPY_ENABLE_SCHEDULER + mp_sched_lock(); + #endif + return 0; +} + +MP_WEAK int esp_hosted_hal_atomic_exit(void) { + #if MICROPY_ENABLE_SCHEDULER + mp_sched_unlock(); + #endif + return 0; +} + +MP_WEAK bool esp_hosted_hal_data_ready(void) { + return mp_hal_pin_read(MICROPY_HW_WIFI_DATAREADY) && mp_hal_pin_read(MICROPY_HW_WIFI_HANDSHAKE); +} + +MP_WEAK int esp_hosted_hal_spi_transfer(const uint8_t *tx_buf, uint8_t *rx_buf, uint32_t size) { + mp_obj_t mp_wifi_spi = MP_STATE_PORT(mp_wifi_spi); + const mp_machine_spi_p_t *spi_proto = MP_OBJ_TYPE_GET_SLOT(&machine_spi_type, protocol); + + // Wait for handshake pin to go high. + for (mp_uint_t start = mp_hal_ticks_ms(); ; mp_hal_delay_ms(1)) { + if (mp_hal_pin_read(MICROPY_HW_WIFI_HANDSHAKE)) { + break; + } + if ((mp_hal_ticks_ms() - start) >= 1000) { + error_printf("timeout waiting for handshake\n"); + return -1; + } + } + + mp_hal_pin_write(MICROPY_HW_WIFI_SPI_CS, 0); + mp_hal_delay_us(10); + spi_proto->transfer(mp_wifi_spi, size, tx_buf, rx_buf); + mp_hal_pin_write(MICROPY_HW_WIFI_SPI_CS, 1); + return 0; +} + +MP_WEAK void *esp_hosted_hal_alloc(void *user, size_t size) { + (void)user; + void *mem = m_malloc0(size); + return mem; +} + +MP_WEAK void esp_hosted_hal_free(void *user, void *ptr) { + (void)user; + m_free(ptr); +} + +MP_WEAK void *esp_hosted_hal_calloc(size_t nmemb, size_t size) { + return NULL; +} + +MP_WEAK void *esp_hosted_hal_realloc(void *ptr, size_t size) { + return NULL; +} + +// Those are provided for protobuf-c's internally +// defined allocator, and are not actually used. +MP_WEAK void *malloc(size_t size) { + (void)size; + debug_printf("system malloc called\n"); + return NULL; +} + +MP_WEAK void free(void *ptr) { + (void)ptr; + debug_printf("system free called\n"); +} + +#endif // MICROPY_PY_NETWORK_NINAW10 |