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micropython/stmhal/usb.c

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 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 <stdarg.h>
#include <string.h>
#include <errno.h>
#include "usbd_core.h"
#include "usbd_desc.h"
#include "usbd_cdc_msc_hid.h"
#include "usbd_cdc_interface.h"
#include "usbd_msc_storage.h"
#include "py/runtime.h"
#include "py/stream.h"
#include "bufhelper.h"
#include "usb.h"
#include "pybioctl.h"
#ifdef USE_DEVICE_MODE
USBD_HandleTypeDef hUSBDDevice;
#endif
STATIC int dev_is_enabled = 0;
void pyb_usb_init0(void) {
// create an exception object for interrupting by VCP
MP_STATE_PORT(mp_const_vcp_interrupt) = mp_obj_new_exception(&mp_type_KeyboardInterrupt);
USBD_CDC_SetInterrupt(-1, MP_STATE_PORT(mp_const_vcp_interrupt));
}
void pyb_usb_dev_init(usb_device_mode_t mode, usb_storage_medium_t medium) {
#ifdef USE_DEVICE_MODE
if (!dev_is_enabled) {
// only init USB once in the device's power-lifetime
// Windows needs a different PID to distinguish different device
// configurations, so we set it here depending on mode.
if (mode == USB_DEVICE_MODE_CDC_MSC) {
USBD_SelectMode(USBD_MODE_CDC_MSC);
USBD_SetPID(0x9800);
} else {
USBD_SelectMode(USBD_MODE_CDC_HID);
USBD_SetPID(0x9801);
}
USBD_Init(&hUSBDDevice, (USBD_DescriptorsTypeDef*)&VCP_Desc, 0);
USBD_RegisterClass(&hUSBDDevice, &USBD_CDC_MSC_HID);
USBD_CDC_RegisterInterface(&hUSBDDevice, (USBD_CDC_ItfTypeDef*)&USBD_CDC_fops);
#if MICROPY_HW_HAS_SDCARD
if (medium == USB_STORAGE_MEDIUM_FLASH) {
USBD_MSC_RegisterStorage(&hUSBDDevice, (USBD_StorageTypeDef*)&USBD_FLASH_STORAGE_fops);
} else {
USBD_MSC_RegisterStorage(&hUSBDDevice, (USBD_StorageTypeDef*)&USBD_SDCARD_STORAGE_fops);
}
#else
USBD_MSC_RegisterStorage(&hUSBDDevice, (USBD_StorageTypeDef*)&USBD_FLASH_STORAGE_fops);
#endif
USBD_Start(&hUSBDDevice);
}
dev_is_enabled = 1;
#endif
}
void pyb_usb_dev_stop(void) {
if (dev_is_enabled) {
USBD_Stop(&hUSBDDevice);
dev_is_enabled = 0;
}
}
bool usb_vcp_is_enabled(void) {
return dev_is_enabled;
}
bool usb_vcp_is_connected(void) {
return USBD_CDC_IsConnected();
}
void usb_vcp_set_interrupt_char(int c) {
if (dev_is_enabled) {
if (c != -1) {
mp_obj_exception_clear_traceback(MP_STATE_PORT(mp_const_vcp_interrupt));
}
USBD_CDC_SetInterrupt(c, MP_STATE_PORT(mp_const_vcp_interrupt));
}
}
int usb_vcp_recv_byte(uint8_t *c) {
return USBD_CDC_Rx(c, 1, 0);
}
void usb_vcp_send_strn(const char *str, int len) {
#ifdef USE_DEVICE_MODE
if (dev_is_enabled) {
USBD_CDC_TxAlways((const uint8_t*)str, len);
}
#endif
}
void usb_vcp_send_strn_cooked(const char *str, int len) {
#ifdef USE_DEVICE_MODE
if (dev_is_enabled) {
for (const char *top = str + len; str < top; str++) {
if (*str == '\n') {
USBD_CDC_TxAlways((const uint8_t*)"\r\n", 2);
} else {
USBD_CDC_TxAlways((const uint8_t*)str, 1);
}
}
}
#endif
}
void usb_hid_send_report(uint8_t *buf) {
#ifdef USE_DEVICE_MODE
USBD_HID_SendReport(&hUSBDDevice, buf, 4);
#endif
}
/******************************************************************************/
// Micro Python bindings for USB VCP
/// \moduleref pyb
/// \class USB_VCP - USB virtual comm port
///
/// The USB_VCP class allows creation of an object representing the USB
/// virtual comm port. It can be used to read and write data over USB to
/// the connected host.
typedef struct _pyb_usb_vcp_obj_t {
mp_obj_base_t base;
} pyb_usb_vcp_obj_t;
STATIC const pyb_usb_vcp_obj_t pyb_usb_vcp_obj = {{&pyb_usb_vcp_type}};
STATIC void pyb_usb_vcp_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
print(env, "USB_VCP()");
}
/// \classmethod \constructor()
/// Create a new USB_VCP object.
STATIC mp_obj_t pyb_usb_vcp_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
// check arguments
mp_arg_check_num(n_args, n_kw, 0, 0, false);
// return the USB VCP object
return (mp_obj_t)&pyb_usb_vcp_obj;
}
STATIC mp_obj_t pyb_usb_vcp_setinterrupt(mp_obj_t self_in, mp_obj_t int_chr_in) {
usb_vcp_set_interrupt_char(mp_obj_get_int(int_chr_in));
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(pyb_usb_vcp_setinterrupt_obj, pyb_usb_vcp_setinterrupt);
/// \method any()
/// Return `True` if any characters waiting, else `False`.
STATIC mp_obj_t pyb_usb_vcp_any(mp_obj_t self_in) {
if (USBD_CDC_RxNum() > 0) {
return mp_const_true;
} else {
return mp_const_false;
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_usb_vcp_any_obj, pyb_usb_vcp_any);
/// \method send(data, *, timeout=5000)
/// Send data over the USB VCP:
///
/// - `data` is the data to send (an integer to send, or a buffer object).
/// - `timeout` is the timeout in milliseconds to wait for the send.
///
/// Return value: number of bytes sent.
STATIC const mp_arg_t pyb_usb_vcp_send_args[] = {
{ MP_QSTR_data, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
{ MP_QSTR_timeout, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 5000} },
};
#define PYB_USB_VCP_SEND_NUM_ARGS MP_ARRAY_SIZE(pyb_usb_vcp_send_args)
STATIC mp_obj_t pyb_usb_vcp_send(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
// parse args
mp_arg_val_t vals[PYB_USB_VCP_SEND_NUM_ARGS];
mp_arg_parse_all(n_args - 1, args + 1, kw_args, PYB_USB_VCP_SEND_NUM_ARGS, pyb_usb_vcp_send_args, vals);
// get the buffer to send from
mp_buffer_info_t bufinfo;
uint8_t data[1];
pyb_buf_get_for_send(vals[0].u_obj, &bufinfo, data);
// send the data
int ret = USBD_CDC_Tx(bufinfo.buf, bufinfo.len, vals[1].u_int);
return mp_obj_new_int(ret);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_usb_vcp_send_obj, 1, pyb_usb_vcp_send);
/// \method recv(data, *, timeout=5000)
///
/// Receive data on the bus:
///
/// - `data` can be an integer, which is the number of bytes to receive,
/// or a mutable buffer, which will be filled with received bytes.
/// - `timeout` is the timeout in milliseconds to wait for the receive.
///
/// Return value: if `data` is an integer then a new buffer of the bytes received,
/// otherwise the number of bytes read into `data` is returned.
STATIC mp_obj_t pyb_usb_vcp_recv(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
// parse args
mp_arg_val_t vals[PYB_USB_VCP_SEND_NUM_ARGS];
mp_arg_parse_all(n_args - 1, args + 1, kw_args, PYB_USB_VCP_SEND_NUM_ARGS, pyb_usb_vcp_send_args, vals);
// get the buffer to receive into
vstr_t vstr;
mp_obj_t o_ret = pyb_buf_get_for_recv(vals[0].u_obj, &vstr);
// receive the data
int ret = USBD_CDC_Rx((uint8_t*)vstr.buf, vstr.len, vals[1].u_int);
// return the received data
if (o_ret != MP_OBJ_NULL) {
return mp_obj_new_int(ret); // number of bytes read into given buffer
} else {
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr); // create a new buffer
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_usb_vcp_recv_obj, 1, pyb_usb_vcp_recv);
mp_obj_t pyb_usb_vcp___exit__(mp_uint_t n_args, const mp_obj_t *args) {
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_usb_vcp___exit___obj, 4, 4, pyb_usb_vcp___exit__);
STATIC const mp_map_elem_t pyb_usb_vcp_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_setinterrupt), (mp_obj_t)&pyb_usb_vcp_setinterrupt_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_any), (mp_obj_t)&pyb_usb_vcp_any_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_send), (mp_obj_t)&pyb_usb_vcp_send_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_recv), (mp_obj_t)&pyb_usb_vcp_recv_obj },
/// \method read([nbytes])
{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&mp_stream_read_obj },
/// \method readall()
{ MP_OBJ_NEW_QSTR(MP_QSTR_readall), (mp_obj_t)&mp_stream_readall_obj },
/// \method readline()
{ MP_OBJ_NEW_QSTR(MP_QSTR_readline), (mp_obj_t)&mp_stream_unbuffered_readline_obj},
/// \method write(buf)
{ MP_OBJ_NEW_QSTR(MP_QSTR_write), (mp_obj_t)&mp_stream_write_obj },
/// \method close()
{ MP_OBJ_NEW_QSTR(MP_QSTR_close), (mp_obj_t)&mp_identity_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR___del__), (mp_obj_t)&mp_identity_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR___enter__), (mp_obj_t)&mp_identity_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR___exit__), (mp_obj_t)&pyb_usb_vcp___exit___obj },
};
STATIC MP_DEFINE_CONST_DICT(pyb_usb_vcp_locals_dict, pyb_usb_vcp_locals_dict_table);
STATIC mp_uint_t pyb_usb_vcp_read(mp_obj_t self_in, void *buf, mp_uint_t size, int *errcode) {
int ret = USBD_CDC_Rx((byte*)buf, size, 0);
if (ret == 0) {
// return EAGAIN error to indicate non-blocking
*errcode = EAGAIN;
return MP_STREAM_ERROR;
}
return ret;
}
STATIC mp_uint_t pyb_usb_vcp_write(mp_obj_t self_in, const void *buf, mp_uint_t size, int *errcode) {
int ret = USBD_CDC_Tx((const byte*)buf, size, 0);
if (ret == 0) {
// return EAGAIN error to indicate non-blocking
*errcode = EAGAIN;
return MP_STREAM_ERROR;
}
return ret;
}
STATIC mp_uint_t pyb_usb_vcp_ioctl(mp_obj_t self_in, mp_uint_t request, mp_uint_t arg, int *errcode) {
mp_uint_t ret;
if (request == MP_IOCTL_POLL) {
mp_uint_t flags = arg;
ret = 0;
if ((flags & MP_IOCTL_POLL_RD) && USBD_CDC_RxNum() > 0) {
ret |= MP_IOCTL_POLL_RD;
}
if ((flags & MP_IOCTL_POLL_WR) && USBD_CDC_TxHalfEmpty()) {
ret |= MP_IOCTL_POLL_WR;
}
} else {
*errcode = EINVAL;
ret = MP_STREAM_ERROR;
}
return ret;
}
STATIC const mp_stream_p_t pyb_usb_vcp_stream_p = {
.read = pyb_usb_vcp_read,
.write = pyb_usb_vcp_write,
.ioctl = pyb_usb_vcp_ioctl,
};
const mp_obj_type_t pyb_usb_vcp_type = {
{ &mp_type_type },
.name = MP_QSTR_USB_VCP,
.print = pyb_usb_vcp_print,
.make_new = pyb_usb_vcp_make_new,
.getiter = mp_identity,
.iternext = mp_stream_unbuffered_iter,
.stream_p = &pyb_usb_vcp_stream_p,
.locals_dict = (mp_obj_t)&pyb_usb_vcp_locals_dict,
};
/******************************************************************************/
// code for experimental USB OTG support
#ifdef USE_HOST_MODE
#include "led.h"
#include "usbh_core.h"
#include "usbh_usr.h"
#include "usbh_hid_core.h"
#include "usbh_hid_keybd.h"
#include "usbh_hid_mouse.h"
__ALIGN_BEGIN USBH_HOST USB_Host __ALIGN_END ;
static int host_is_enabled = 0;
void pyb_usb_host_init(void) {
if (!host_is_enabled) {
// only init USBH once in the device's power-lifetime
/* Init Host Library */
USBH_Init(&USB_OTG_Core, USB_OTG_FS_CORE_ID, &USB_Host, &HID_cb, &USR_Callbacks);
}
host_is_enabled = 1;
}
void pyb_usb_host_process(void) {
USBH_Process(&USB_OTG_Core, &USB_Host);
}
uint8_t usb_keyboard_key = 0;
// TODO this is an ugly hack to get key presses
uint pyb_usb_host_get_keyboard(void) {
uint key = usb_keyboard_key;
usb_keyboard_key = 0;
return key;
}
void USR_MOUSE_Init(void) {
led_state(4, 1);
USB_OTG_BSP_mDelay(100);
led_state(4, 0);
}
void USR_MOUSE_ProcessData(HID_MOUSE_Data_TypeDef *data) {
led_state(4, 1);
USB_OTG_BSP_mDelay(50);
led_state(4, 0);
}
void USR_KEYBRD_Init(void) {
led_state(4, 1);
USB_OTG_BSP_mDelay(100);
led_state(4, 0);
}
void USR_KEYBRD_ProcessData(uint8_t pbuf) {
led_state(4, 1);
USB_OTG_BSP_mDelay(50);
led_state(4, 0);
usb_keyboard_key = pbuf;
}
#endif // USE_HOST_MODE
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