201 lines
6.4 KiB
C
201 lines
6.4 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018-2020 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "extmod/modbluetooth_hci.h"
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#include "systick.h"
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#include "pendsv.h"
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#include "py/obj.h"
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#if MICROPY_PY_BLUETOOTH
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uint8_t mp_bluetooth_hci_cmd_buf[4 + 256];
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// Must be provided by the stack bindings.
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extern void mp_bluetooth_hci_poll(void);
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// Hook for pendsv poller to run this periodically every 128ms
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#define BLUETOOTH_HCI_TICK(tick) (((tick) & ~(SYSTICK_DISPATCH_NUM_SLOTS - 1) & 0x7f) == 0)
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// Called periodically (systick) or directly (e.g. uart irq).
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void mp_bluetooth_hci_poll_wrapper(uint32_t ticks_ms) {
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if (ticks_ms == 0 || BLUETOOTH_HCI_TICK(ticks_ms)) {
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pendsv_schedule_dispatch(PENDSV_DISPATCH_BLUETOOTH_HCI, mp_bluetooth_hci_poll);
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}
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}
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#if defined(STM32WB)
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/******************************************************************************/
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// HCI over IPCC
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#include <string.h>
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#include "rfcore.h"
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STATIC uint16_t hci_uart_rx_buf_cur;
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STATIC uint16_t hci_uart_rx_buf_len;
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STATIC uint8_t hci_uart_rx_buf_data[256];
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int mp_bluetooth_hci_controller_deactivate(void) {
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return 0;
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}
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int mp_bluetooth_hci_controller_sleep_maybe(void) {
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return 0;
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}
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bool mp_bluetooth_hci_controller_woken(void) {
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return true;
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}
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int mp_bluetooth_hci_controller_wakeup(void) {
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return 0;
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}
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int mp_bluetooth_hci_uart_init(uint32_t port) {
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(void)port;
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return 0;
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}
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int mp_bluetooth_hci_uart_activate(void) {
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rfcore_ble_init();
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hci_uart_rx_buf_cur = 0;
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hci_uart_rx_buf_len = 0;
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return 0;
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}
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int mp_bluetooth_hci_uart_set_baudrate(uint32_t baudrate) {
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(void)baudrate;
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return 0;
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}
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int mp_bluetooth_hci_uart_write(const uint8_t *buf, size_t len) {
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MICROPY_PY_BLUETOOTH_ENTER
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rfcore_ble_hci_cmd(len, (const uint8_t *)buf);
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MICROPY_PY_BLUETOOTH_EXIT
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return 0;
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}
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// Callback to copy data into local hci_uart_rx_buf_data buffer for subsequent use.
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STATIC int mp_bluetooth_hci_uart_msg_cb(void *env, const uint8_t *buf, size_t len) {
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(void)env;
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if (hci_uart_rx_buf_len + len > MP_ARRAY_SIZE(hci_uart_rx_buf_data)) {
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len = MP_ARRAY_SIZE(hci_uart_rx_buf_data) - hci_uart_rx_buf_len;
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}
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memcpy(hci_uart_rx_buf_data + hci_uart_rx_buf_len, buf, len);
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hci_uart_rx_buf_len += len;
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return 0;
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}
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int mp_bluetooth_hci_uart_readchar(void) {
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if (hci_uart_rx_buf_cur >= hci_uart_rx_buf_len) {
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hci_uart_rx_buf_cur = 0;
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hci_uart_rx_buf_len = 0;
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rfcore_ble_check_msg(mp_bluetooth_hci_uart_msg_cb, NULL);
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}
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if (hci_uart_rx_buf_cur < hci_uart_rx_buf_len) {
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return hci_uart_rx_buf_data[hci_uart_rx_buf_cur++];
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} else {
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return -1;
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}
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}
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#else
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/******************************************************************************/
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// HCI over UART
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#include "pendsv.h"
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#include "uart.h"
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pyb_uart_obj_t mp_bluetooth_hci_uart_obj;
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mp_irq_obj_t mp_bluetooth_hci_uart_irq_obj;
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static uint8_t hci_uart_rxbuf[512];
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mp_obj_t mp_uart_interrupt(mp_obj_t self_in) {
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// New HCI data, schedule mp_bluetooth_hci_poll to make the stack handle it.
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mp_bluetooth_hci_poll_wrapper(0);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(mp_uart_interrupt_obj, mp_uart_interrupt);
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int mp_bluetooth_hci_uart_init(uint32_t port) {
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// bits (8), stop (1), parity (none) and flow (rts/cts) are assumed to match MYNEWT_VAL_BLE_HCI_UART_ constants in syscfg.h.
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mp_bluetooth_hci_uart_obj.base.type = &pyb_uart_type;
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mp_bluetooth_hci_uart_obj.uart_id = port;
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mp_bluetooth_hci_uart_obj.is_static = true;
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mp_bluetooth_hci_uart_obj.timeout = 2;
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mp_bluetooth_hci_uart_obj.timeout_char = 2;
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MP_STATE_PORT(pyb_uart_obj_all)[mp_bluetooth_hci_uart_obj.uart_id - 1] = &mp_bluetooth_hci_uart_obj;
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return 0;
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}
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int mp_bluetooth_hci_uart_set_baudrate(uint32_t baudrate) {
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uart_init(&mp_bluetooth_hci_uart_obj, baudrate, UART_WORDLENGTH_8B, UART_PARITY_NONE, UART_STOPBITS_1, UART_HWCONTROL_RTS | UART_HWCONTROL_CTS);
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uart_set_rxbuf(&mp_bluetooth_hci_uart_obj, sizeof(hci_uart_rxbuf), hci_uart_rxbuf);
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return 0;
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}
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int mp_bluetooth_hci_uart_activate(void) {
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// Add IRQ handler for IDLE (i.e. packet finished).
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uart_irq_config(&mp_bluetooth_hci_uart_obj, false);
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mp_irq_init(&mp_bluetooth_hci_uart_irq_obj, &uart_irq_methods, MP_OBJ_FROM_PTR(&mp_bluetooth_hci_uart_obj));
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mp_bluetooth_hci_uart_obj.mp_irq_obj = &mp_bluetooth_hci_uart_irq_obj;
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mp_bluetooth_hci_uart_obj.mp_irq_trigger = UART_FLAG_IDLE;
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mp_bluetooth_hci_uart_irq_obj.handler = MP_OBJ_FROM_PTR(&mp_uart_interrupt_obj);
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mp_bluetooth_hci_uart_irq_obj.ishard = true;
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uart_irq_config(&mp_bluetooth_hci_uart_obj, true);
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mp_bluetooth_hci_controller_init();
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mp_bluetooth_hci_controller_activate();
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return 0;
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}
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int mp_bluetooth_hci_uart_write(const uint8_t *buf, size_t len) {
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mp_bluetooth_hci_controller_wakeup();
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uart_tx_strn(&mp_bluetooth_hci_uart_obj, (void *)buf, len);
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return 0;
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}
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// This function expects the controller to be in the wake state via a previous call
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// to mp_bluetooth_hci_controller_woken.
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int mp_bluetooth_hci_uart_readchar(void) {
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if (uart_rx_any(&mp_bluetooth_hci_uart_obj)) {
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return uart_rx_char(&mp_bluetooth_hci_uart_obj);
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} else {
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return -1;
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}
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}
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#endif // defined(STM32WB)
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#endif // MICROPY_PY_BLUETOOTH
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