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/*
* 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 <string.h>
#include "rfcore.h"
STATIC uint16_t hci_uart_rx_buf_cur;
STATIC uint16_t hci_uart_rx_buf_len;
STATIC uint8_t hci_uart_rx_buf_data[256];
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();
hci_uart_rx_buf_cur = 0;
hci_uart_rx_buf_len = 0;
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;
}
// Callback to copy data into local hci_uart_rx_buf_data buffer for subsequent use.
STATIC int mp_bluetooth_hci_uart_msg_cb(void *env, const uint8_t *buf, size_t len) {
(void)env;
if (hci_uart_rx_buf_len + len > MP_ARRAY_SIZE(hci_uart_rx_buf_data)) {
len = MP_ARRAY_SIZE(hci_uart_rx_buf_data) - hci_uart_rx_buf_len;
}
memcpy(hci_uart_rx_buf_data + hci_uart_rx_buf_len, buf, len);
hci_uart_rx_buf_len += len;
return 0;
}
int mp_bluetooth_hci_uart_readchar(void) {
if (hci_uart_rx_buf_cur >= hci_uart_rx_buf_len) {
hci_uart_rx_buf_cur = 0;
hci_uart_rx_buf_len = 0;
rfcore_ble_check_msg(mp_bluetooth_hci_uart_msg_cb, NULL);
}
if (hci_uart_rx_buf_cur < hci_uart_rx_buf_len) {
return hci_uart_rx_buf_data[hci_uart_rx_buf_cur++];
} else {
return -1;
}
}
#else
/******************************************************************************/
// HCI over UART
#include "pendsv.h"
#include "uart.h"
pyb_uart_obj_t mp_bluetooth_hci_uart_obj;
mp_irq_obj_t mp_bluetooth_hci_uart_irq_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) {
// Add IRQ handler for IDLE (i.e. packet finished).
uart_irq_config(&mp_bluetooth_hci_uart_obj, false);
mp_irq_init(&mp_bluetooth_hci_uart_irq_obj, &uart_irq_methods, MP_OBJ_FROM_PTR(&mp_bluetooth_hci_uart_obj));
mp_bluetooth_hci_uart_obj.mp_irq_obj = &mp_bluetooth_hci_uart_irq_obj;
mp_bluetooth_hci_uart_obj.mp_irq_trigger = UART_FLAG_IDLE;
mp_bluetooth_hci_uart_irq_obj.handler = MP_OBJ_FROM_PTR(&mp_uart_interrupt_obj);
mp_bluetooth_hci_uart_irq_obj.ishard = true;
uart_irq_config(&mp_bluetooth_hci_uart_obj, true);
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;
}
// This function expects the controller to be in the wake state via a previous call
// to mp_bluetooth_hci_controller_woken.
int mp_bluetooth_hci_uart_readchar(void) {
if (uart_rx_any(&mp_bluetooth_hci_uart_obj)) {
return uart_rx_char(&mp_bluetooth_hci_uart_obj);
} else {
return -1;
}
}
#endif // defined(STM32WB)
#endif // MICROPY_PY_BLUETOOTH
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