mimxrt: Integrate support for WiFi via the CYW43 driver.

This commit adds the necessary configuration and hooks to get the CYW43
driver working with the mimxrt port.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

ports/mimxrt/board_init.c

@@ -63,6 +63,7 @@ void board_init(void) {
 
     // 1ms tick timer
     SysTick_Config(SystemCoreClock / 1000);
+    NVIC_SetPriority(SysTick_IRQn, NVIC_EncodePriority(NVIC_PRIORITYGROUP_4, 0, 0));
 
     // USB0
     usb_phy0_init(0b0111, 0b0110, 0b0110);  // Configure nominal values for D_CAL and TXCAL45DP/DN

ports/mimxrt/cyw43_configport.h

@@ -0,0 +1,155 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022 Damien P. George
+ * Copyright (c) 2022 Jim Mussared
+ *
+ * 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 MICROPY_INCLUDED_STM32_CYW43_CONFIGPORT_H
+#define MICROPY_INCLUDED_STM32_CYW43_CONFIGPORT_H
+
+// The board-level config will be included here, so it can set some CYW43 values.
+#include "py/mpconfig.h"
+#include "py/mperrno.h"
+#include "py/mphal.h"
+#include "extmod/modnetwork.h"
+#include "pendsv.h"
+#include "sdio.h"
+
+#define CYW43_USE_SPI                   (0)
+#define CYW43_LWIP                      (1)
+#define CYW43_USE_STATS                 (0)
+
+#ifndef CYW43_CHIPSET_FIRMWARE_INCLUDE_FILE
+#define CYW43_CHIPSET_FIRMWARE_INCLUDE_FILE "lib/cyw43-driver/firmware/w4343WA1_7_45_98_50_combined.h"
+#endif
+
+#ifndef CYW43_WIFI_NVRAM_INCLUDE_FILE
+#define CYW43_WIFI_NVRAM_INCLUDE_FILE   "lib/cyw43-driver/firmware/wifi_nvram_1dx.h"
+#endif
+
+#define CYW43_IOCTL_TIMEOUT_US          (1000000)
+#define CYW43_SLEEP_MAX                 (50)
+#define CYW43_NETUTILS                  (1)
+#define CYW43_CLEAR_SDIO_INT            (1)
+
+#define CYW43_EPERM                     MP_EPERM // Operation not permitted
+#define CYW43_EIO                       MP_EIO // I/O error
+#define CYW43_EINVAL                    MP_EINVAL // Invalid argument
+#define CYW43_ETIMEDOUT                 MP_ETIMEDOUT // Connection timed out
+
+#define CYW43_THREAD_ENTER              MICROPY_PY_LWIP_ENTER
+#define CYW43_THREAD_EXIT               MICROPY_PY_LWIP_EXIT
+#define CYW43_THREAD_LOCK_CHECK
+
+#define CYW43_HOST_NAME                 mod_network_hostname
+
+#define CYW43_SDPCM_SEND_COMMON_WAIT    __WFI();
+#define CYW43_DO_IOCTL_WAIT             __WFI();
+
+#define CYW43_ARRAY_SIZE(a)             MP_ARRAY_SIZE(a)
+
+#define CYW43_HAL_PIN_MODE_INPUT        MP_HAL_PIN_MODE_INPUT
+#define CYW43_HAL_PIN_MODE_OUTPUT       MP_HAL_PIN_MODE_OUTPUT
+#define CYW43_HAL_PIN_PULL_NONE         MP_HAL_PIN_PULL_NONE
+#define CYW43_HAL_PIN_PULL_UP           MP_HAL_PIN_PULL_UP
+#define CYW43_HAL_PIN_PULL_DOWN         MP_HAL_PIN_PULL_DOWN
+
+#define CYW43_HAL_MAC_WLAN0             MP_HAL_MAC_WLAN0
+
+#define cyw43_hal_ticks_us              mp_hal_ticks_us
+#define cyw43_hal_ticks_ms              mp_hal_ticks_ms
+
+#define cyw43_hal_pin_obj_t             mp_hal_pin_obj_t
+#define cyw43_hal_pin_read              mp_hal_pin_read
+#define cyw43_hal_pin_low               mp_hal_pin_low
+#define cyw43_hal_pin_high              mp_hal_pin_high
+
+#define cyw43_hal_get_mac               mp_hal_get_mac
+#define cyw43_hal_get_mac_ascii         mp_hal_get_mac_ascii
+#define cyw43_hal_generate_laa_mac      mp_hal_generate_laa_mac
+
+#define cyw43_delay_us                  mp_hal_delay_us
+#define cyw43_delay_ms                  mp_hal_delay_ms
+
+#define CYW43_PIN_WL_REG_ON             MICROPY_HW_WL_REG_ON
+#define CYW43_PIN_WL_HOST_WAKE          MICROPY_HW_WL_HOST_WAKE
+#define CYW43_PIN_WL_SDIO_1             MICROPY_HW_SDIO_D1
+
+#define CYW43_PIN_BT_REG_ON             MICROPY_HW_BT_REG_ON
+#ifdef MICROPY_HW_BT_HOST_WAKE
+#define CYW43_PIN_BT_HOST_WAKE          MICROPY_HW_BT_HOST_WAKE
+#endif
+#ifdef MICROPY_HW_BT_DEV_WAKE
+#define CYW43_PIN_BT_DEV_WAKE           MICROPY_HW_BT_DEV_WAKE
+#endif
+#ifdef MICROPY_HW_BT_CTS
+#define CYW43_PIN_BT_CTS                MICROPY_HW_BT_CTS
+#endif
+
+#if MICROPY_HW_ENABLE_RF_SWITCH
+#define CYW43_PIN_WL_RFSW_VDD           pin_WL_RFSW_VDD
+#endif
+
+#define cyw43_schedule_internal_poll_dispatch(func) pendsv_schedule_dispatch(PENDSV_DISPATCH_CYW43, func)
+
+static inline void cyw43_hal_pin_config(cyw43_hal_pin_obj_t pin, uint8_t mode, uint8_t pull, uint8_t alt) {
+    machine_pin_set_mode(pin, mode);
+}
+
+static inline void cyw43_hal_pin_config_irq_falling(cyw43_hal_pin_obj_t pin, int enable) {
+    if (enable) {
+        machine_pin_config(pin, PIN_MODE_IT_FALLING, PIN_PULL_UP_100K, 0, 0, PIN_AF_MODE_ALT5);
+    }
+}
+
+static inline void cyw43_sdio_init(void) {
+    sdio_init(NVIC_EncodePriority(NVIC_PRIORITYGROUP_4, 14, 0));
+}
+
+static inline void cyw43_sdio_reinit(void) {
+    sdio_reenable();
+}
+
+static inline void cyw43_sdio_deinit(void) {
+    sdio_deinit();
+}
+
+static inline void cyw43_sdio_set_irq(bool enable) {
+    sdio_enable_irq(enable);
+}
+
+static inline void cyw43_sdio_enable_high_speed_4bit(void) {
+    sdio_enable_high_speed_4bit();
+}
+
+static inline int cyw43_sdio_transfer(uint32_t cmd, uint32_t arg, uint32_t *resp) {
+    return sdio_transfer(cmd, arg, resp);
+}
+
+static inline int cyw43_sdio_transfer_cmd53(bool write, uint32_t block_size, uint32_t arg, size_t len, uint8_t *buf) {
+    return sdio_transfer_cmd53(write, block_size, arg, len, buf);
+}
+
+#define CYW43_EVENT_POLL_HOOK MICROPY_EVENT_POLL_HOOK
+
+#endif // MICROPY_INCLUDED_STM32_CYW43_CONFIGPORT_H

ports/mimxrt/machine_pin.c

@@ -34,6 +34,9 @@
 #include "shared/runtime/mpirq.h"
 #include "extmod/virtpin.h"
 #include "pin.h"
+#if MICROPY_PY_NETWORK_CYW43
+#include "pendsv.h"
+#endif
 
 // Local functions
 STATIC mp_obj_t machine_pin_obj_init_helper(const machine_pin_obj_t *self, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args);
@@ -98,6 +101,16 @@ void call_handler(GPIO_Type *gpio, int gpio_nr, int pin) {
         if (isr & mask) {
             gpio->ISR = mask; // clear the ISR flag
             int index = GET_PIN_IRQ_INDEX(gpio_nr, pin);
+            #if MICROPY_PY_NETWORK_CYW43
+            extern void (*cyw43_poll)(void);
+            const machine_pin_obj_t *pin = MICROPY_HW_WL_HOST_WAKE;
+            if (pin->gpio == gpio && pin->pin == (index % 32)) {
+                if (cyw43_poll) {
+                    pendsv_schedule_dispatch(PENDSV_DISPATCH_CYW43, cyw43_poll);
+                }
+                return;
+            }
+            #endif
             machine_pin_irq_obj_t *irq = MP_STATE_PORT(machine_pin_irq_objects[index]);
             if (irq != NULL) {
                 irq->flags = irq->trigger;

ports/mimxrt/main.c

@@ -43,6 +43,9 @@
 #if MICROPY_PY_LWIP
 #include "lwip/init.h"
 #include "lwip/apps/mdns.h"
+#if MICROPY_PY_NETWORK_CYW43
+#include "lib/cyw43-driver/src/cyw43.h"
+#endif
 #endif
 #include "systick.h"
 #include "extmod/modnetwork.h"
@@ -69,6 +72,17 @@ int main(void) {
     systick_enable_dispatch(SYSTICK_DISPATCH_LWIP, mod_network_lwip_poll_wrapper);
     #endif
 
+    #if MICROPY_PY_NETWORK_CYW43
+    {
+        cyw43_init(&cyw43_state);
+        uint8_t buf[8];
+        memcpy(&buf[0], "PYBD", 4);
+        mp_hal_get_mac_ascii(MP_HAL_MAC_WLAN0, 8, 4, (char *)&buf[4]);
+        cyw43_wifi_ap_set_ssid(&cyw43_state, 8, buf);
+        cyw43_wifi_ap_set_password(&cyw43_state, 8, (const uint8_t *)"pybd0123");
+    }
+    #endif
+
     for (;;) {
         #if defined(MICROPY_HW_LED1)
         led_init();

ports/mimxrt/mpconfigport.h

@@ -170,12 +170,20 @@ extern const struct _mp_obj_type_t network_lan_type;
 #define MICROPY_HW_NIC_ETH
 #endif
 
+#if MICROPY_PY_NETWORK_CYW43
+extern const struct _mp_obj_type_t mp_network_cyw43_type;
+#define MICROPY_HW_NIC_CYW43                { MP_ROM_QSTR(MP_QSTR_WLAN), MP_ROM_PTR(&mp_network_cyw43_type) },
+#else
+#define MICROPY_HW_NIC_CYW43
+#endif
+
 #ifndef MICROPY_BOARD_NETWORK_INTERFACES
 #define MICROPY_BOARD_NETWORK_INTERFACES
 #endif
 
 #define MICROPY_PORT_NETWORK_INTERFACES \
     MICROPY_HW_NIC_ETH  \
+    MICROPY_HW_NIC_CYW43 \
     MICROPY_BOARD_NETWORK_INTERFACES \
 
 #ifndef MICROPY_BOARD_ROOT_POINTERS

ports/mimxrt/mpnetworkport.c

@@ -43,6 +43,11 @@
 #include "lwip/dhcp.h"
 #include "lwip/apps/mdns.h"
 
+#if MICROPY_PY_NETWORK_CYW43
+#include "extmod/network_cyw43.h"
+#include "lib/cyw43-driver/src/cyw43.h"
+#endif
+
 // Poll lwIP every 128ms
 #define LWIP_TICK(tick) (((tick) & ~(SYSTICK_DISPATCH_NUM_SLOTS - 1) & 0x7f) == 0)
 
@@ -59,6 +64,16 @@ void mod_network_lwip_poll_wrapper(uint32_t ticks_ms) {
     if (LWIP_TICK(ticks_ms)) {
         pendsv_schedule_dispatch(PENDSV_DISPATCH_LWIP, pyb_lwip_poll);
     }
+
+    #if MICROPY_PY_NETWORK_CYW43
+    if (cyw43_poll) {
+        if (cyw43_sleep != 0) {
+            if (--cyw43_sleep == 0) {
+                pendsv_schedule_dispatch(PENDSV_DISPATCH_CYW43, cyw43_poll);
+            }
+        }
+    }
+    #endif
 }
 
 #endif // MICROPY_PY_LWIP

ports/mimxrt/pendsv.h

@@ -31,6 +31,9 @@ enum {
     #if MICROPY_PY_NETWORK && MICROPY_PY_LWIP
     PENDSV_DISPATCH_LWIP,
     #endif
+    #if MICROPY_PY_NETWORK_CYW43
+    PENDSV_DISPATCH_CYW43,
+    #endif
     MICROPY_BOARD_PENDSV_ENTRIES
     PENDSV_DISPATCH_MAX
 };