drivers/esp-hosted: Add host driver for ESP-Hosted firmware.

This is a host driver for ESP32 chips running the esp-hosted firmware,
which turns ESP32s into a WLAN/BT co-processor.

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

1 files changed, 63 insertions, 0 deletions

diff --git a/drivers/esp-hosted/esp_hosted_stack.h b/drivers/esp-hosted/esp_hosted_stack.h
new file mode 100644
index 0000000000..8fa45cc43b
--- /dev/null
+++ b/drivers/esp-hosted/esp_hosted_stack.h
@@ -0,0 +1,63 @@
+/*
+ * 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.
+ *
+ * Simple stack for control messages.
+ */
+
+#ifndef MICROPY_INCLUDED_DRIVERS_ESP_HOSTED_STACK_H
+#define MICROPY_INCLUDED_DRIVERS_ESP_HOSTED_STACK_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include "esp_hosted_internal.h"
+
+static inline void esp_hosted_stack_init(esp_hosted_stack_t *stack) {
+    stack->capacity = ESP_STACK_CAPACITY;
+    stack->top = 0;
+}
+
+static inline bool esp_hosted_stack_empty(esp_hosted_stack_t *stack) {
+    return stack->top == 0;
+}
+
+static inline bool esp_hosted_stack_push(esp_hosted_stack_t *stack, void *data) {
+    if (stack->top < stack->capacity) {
+        stack->buff[stack->top++] = data;
+        return true;
+    }
+    return false;
+}
+
+static inline void *esp_hosted_stack_pop(esp_hosted_stack_t *stack, bool peek) {
+    void *data = NULL;
+    if (stack->top > 0) {
+        data = stack->buff[stack->top - 1];
+        if (!peek) {
+            stack->top -= 1;
+        }
+    }
+    return data;
+}
+#endif // MICROPY_INCLUDED_DRIVERS_ESP_HOSTED_STACK_H