1 files changed, 158 insertions, 0 deletions
diff --git a/ports/stm32/modbluetooth_hci.c b/ports/stm32/modbluetooth_hci.c
new file mode 100644
index 0000000000..c6937b2b2a
--- /dev/null
+++ b/ports/stm32/modbluetooth_hci.c
@@ -0,0 +1,158 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018-2020 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 "py/runtime.h"
+#include "py/mphal.h"
+#include "extmod/modbluetooth_hci.h"
+#include "systick.h"
+#include "pendsv.h"
+
+#include "py/obj.h"
+
+#if MICROPY_PY_BLUETOOTH
+
+uint8_t mp_bluetooth_hci_cmd_buf[4 + 256];
+
+// Must be provided by the stack bindings.
+extern void mp_bluetooth_hci_poll(void);
+
+// Hook for pendsv poller to run this periodically every 128ms
+#define BLUETOOTH_HCI_TICK(tick) (((tick) & ~(SYSTICK_DISPATCH_NUM_SLOTS - 1) & 0x7f) == 0)
+
+// Called periodically (systick) or directly (e.g. uart irq).
+void mp_bluetooth_hci_poll_wrapper(uint32_t ticks_ms) {
+    if (ticks_ms == 0 || BLUETOOTH_HCI_TICK(ticks_ms)) {
+        pendsv_schedule_dispatch(PENDSV_DISPATCH_BLUETOOTH_HCI, mp_bluetooth_hci_poll);
+    }
+}
+
+#if defined(STM32WB)
+
+/******************************************************************************/
+// HCI over IPCC
+
+#include "rfcore.h"
+
+int mp_bluetooth_hci_controller_deactivate(void) {
+    return 0;
+}
+
+int mp_bluetooth_hci_controller_sleep_maybe(void) {
+    return 0;
+}
+
+bool mp_bluetooth_hci_controller_woken(void) {
+    return true;
+}
+
+int mp_bluetooth_hci_controller_wakeup(void) {
+    return 0;
+}
+
+int mp_bluetooth_hci_uart_init(uint32_t port) {
+    (void)port;
+    return 0;
+}
+
+int mp_bluetooth_hci_uart_activate(void) {
+    rfcore_ble_init();
+    return 0;
+}
+
+int mp_bluetooth_hci_uart_set_baudrate(uint32_t baudrate) {
+    (void)baudrate;
+    return 0;
+}
+
+int mp_bluetooth_hci_uart_write(const uint8_t *buf, size_t len) {
+    MICROPY_PY_BLUETOOTH_ENTER
+    rfcore_ble_hci_cmd(len, (const uint8_t *)buf);
+    MICROPY_PY_BLUETOOTH_EXIT
+    return 0;
+}
+
+#else
+
+/******************************************************************************/
+// HCI over UART
+
+#include "pendsv.h"
+#include "uart.h"
+
+pyb_uart_obj_t mp_bluetooth_hci_uart_obj;
+
+static uint8_t hci_uart_rxbuf[512];
+
+mp_obj_t mp_uart_interrupt(mp_obj_t self_in) {
+    // New HCI data, schedule mp_bluetooth_hci_poll to make the stack handle it.
+    mp_bluetooth_hci_poll_wrapper(0);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(mp_uart_interrupt_obj, mp_uart_interrupt);
+
+int mp_bluetooth_hci_uart_init(uint32_t port) {
+    // bits (8), stop (1), parity (none) and flow (rts/cts) are assumed to match MYNEWT_VAL_BLE_HCI_UART_ constants in syscfg.h.
+    mp_bluetooth_hci_uart_obj.base.type = &pyb_uart_type;
+    mp_bluetooth_hci_uart_obj.uart_id = port;
+    mp_bluetooth_hci_uart_obj.is_static = true;
+    mp_bluetooth_hci_uart_obj.timeout = 2;
+    mp_bluetooth_hci_uart_obj.timeout_char = 2;
+    MP_STATE_PORT(pyb_uart_obj_all)[mp_bluetooth_hci_uart_obj.uart_id - 1] = &mp_bluetooth_hci_uart_obj;
+    return 0;
+}
+
+int mp_bluetooth_hci_uart_set_baudrate(uint32_t baudrate) {
+    uart_init(&mp_bluetooth_hci_uart_obj, baudrate, UART_WORDLENGTH_8B, UART_PARITY_NONE, UART_STOPBITS_1, UART_HWCONTROL_RTS | UART_HWCONTROL_CTS);
+    uart_set_rxbuf(&mp_bluetooth_hci_uart_obj, sizeof(hci_uart_rxbuf), hci_uart_rxbuf);
+    return 0;
+}
+
+int mp_bluetooth_hci_uart_activate(void) {
+    // Interrupt on RX chunk received (idle)
+    // Trigger stack poll when this happens
+    mp_obj_t uart_irq_fn = mp_load_attr(MP_OBJ_FROM_PTR(&mp_bluetooth_hci_uart_obj), MP_QSTR_irq);
+    mp_obj_t uargs[] = {
+        MP_OBJ_FROM_PTR(&mp_uart_interrupt_obj),
+        MP_OBJ_NEW_SMALL_INT(UART_FLAG_IDLE),
+        mp_const_true,
+    };
+    mp_call_function_n_kw(uart_irq_fn, 3, 0, uargs);
+
+    mp_bluetooth_hci_controller_init();
+    mp_bluetooth_hci_controller_activate();
+
+    return 0;
+}
+
+int mp_bluetooth_hci_uart_write(const uint8_t *buf, size_t len) {
+    mp_bluetooth_hci_controller_wakeup();
+    uart_tx_strn(&mp_bluetooth_hci_uart_obj, (void *)buf, len);
+    return 0;
+}
+
+#endif // defined(STM32WB)
+
+#endif // MICROPY_PY_BLUETOOTH