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micropython/ports/stm32/usb.c
Damien George fa07deda9f stm32/usbd_hid_interface: Rewrite USB HID interface code. 
The previous version did not work on MCUs that only had USB device mode
(compared to OTG) because of the handling of NAK.  And this previous
handling of NAK had a race condition where a new packet could come in
before USBD_HID_SetNAK was called (since USBD_HID_ReceivePacket clears NAK
as part of its operation).  Furthermore, the double buffering of incoming
reports was not working, only one buffer could be used at a time.

This commit rewrites the HID interface code to have a single incoming
buffer, and only calls USBD_HID_ReceivePacket after the user has read the
incoming report (similar to how the VCP does its flow control).  As such,
USBD_HID_SetNAK and USBD_HID_ClearNAK are no longer needed.

API functionality from the user's point of view should be unchanged with
this commit.
2019-07-25 17:42:17 +10:00

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014, 2015 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 "usbd_core.h"
#include "usbd_desc.h"
#include "usbd_cdc_msc_hid.h"
#include "usbd_cdc_interface.h"
#include "usbd_msc_interface.h"
#include "usbd_hid_interface.h"
#include "py/objstr.h"
#include "py/runtime.h"
#include "py/stream.h"
#include "py/mperrno.h"
#include "py/mphal.h"
#include "bufhelper.h"
#include "storage.h"
#include "sdcard.h"
#include "usb.h"
#if MICROPY_HW_ENABLE_USB
// Work out which USB device to use as the main one (the one with the REPL)
#if !defined(MICROPY_HW_USB_MAIN_DEV)
#if defined(MICROPY_HW_USB_FS)
#define MICROPY_HW_USB_MAIN_DEV (USB_PHY_FS_ID)
#elif defined(MICROPY_HW_USB_HS)
#define MICROPY_HW_USB_MAIN_DEV (USB_PHY_HS_ID)
#else
#error Unable to determine proper MICROPY_HW_USB_MAIN_DEV to use
#endif
#endif
STATIC void pyb_usb_vcp_init0(void);
// this will be persistent across a soft-reset
mp_uint_t pyb_usb_flags = 0;
typedef struct _usb_device_t {
uint32_t enabled;
USBD_HandleTypeDef hUSBDDevice;
usbd_cdc_msc_hid_state_t usbd_cdc_msc_hid_state;
usbd_cdc_itf_t usbd_cdc_itf[MICROPY_HW_USB_CDC_NUM];
#if MICROPY_HW_USB_HID
usbd_hid_itf_t usbd_hid_itf;
#endif
} usb_device_t;
usb_device_t usb_device = {0};
pyb_usb_storage_medium_t pyb_usb_storage_medium = PYB_USB_STORAGE_MEDIUM_NONE;
#if MICROPY_HW_USB_HID
// predefined hid mouse data
STATIC const mp_obj_str_t pyb_usb_hid_mouse_desc_obj = {
{&mp_type_bytes},
0, // hash not valid
USBD_HID_MOUSE_REPORT_DESC_SIZE,
USBD_HID_MOUSE_ReportDesc,
};
const mp_rom_obj_tuple_t pyb_usb_hid_mouse_obj = {
{&mp_type_tuple},
5,
{
MP_ROM_INT(1), // subclass: boot
MP_ROM_INT(2), // protocol: mouse
MP_ROM_INT(USBD_HID_MOUSE_MAX_PACKET),
MP_ROM_INT(8), // polling interval: 8ms
MP_ROM_PTR(&pyb_usb_hid_mouse_desc_obj),
},
};
// predefined hid keyboard data
STATIC const mp_obj_str_t pyb_usb_hid_keyboard_desc_obj = {
{&mp_type_bytes},
0, // hash not valid
USBD_HID_KEYBOARD_REPORT_DESC_SIZE,
USBD_HID_KEYBOARD_ReportDesc,
};
const mp_rom_obj_tuple_t pyb_usb_hid_keyboard_obj = {
{&mp_type_tuple},
5,
{
MP_ROM_INT(1), // subclass: boot
MP_ROM_INT(1), // protocol: keyboard
MP_ROM_INT(USBD_HID_KEYBOARD_MAX_PACKET),
MP_ROM_INT(8), // polling interval: 8ms
MP_ROM_PTR(&pyb_usb_hid_keyboard_desc_obj),
},
};
#endif
void pyb_usb_init0(void) {
for (int i = 0; i < MICROPY_HW_USB_CDC_NUM; ++i) {
usb_device.usbd_cdc_itf[i].attached_to_repl = false;
}
MP_STATE_PORT(pyb_hid_report_desc) = MP_OBJ_NULL;
pyb_usb_vcp_init0();
}
int pyb_usb_dev_detect(void) {
if (usb_device.enabled) {
return usb_device.hUSBDDevice.id;
}
#if MICROPY_HW_USB_FS && MICROPY_HW_USB_HS
// Try to auto-detect which USB is connected by reading DP/DM pins
for (int i = 0; i < 2; ++i) {
mp_hal_pin_obj_t dp = i == 0 ? pyb_pin_USB_DP : pyb_pin_USB_HS_DP;
mp_hal_pin_obj_t dm = i == 0 ? pyb_pin_USB_DM : pyb_pin_USB_HS_DM;
mp_hal_pin_config(dp, MP_HAL_PIN_MODE_INPUT, MP_HAL_PIN_PULL_UP, 0);
mp_hal_pin_config(dm, MP_HAL_PIN_MODE_INPUT, MP_HAL_PIN_PULL_UP, 0);
int state = mp_hal_pin_read(dp) == 0 && mp_hal_pin_read(dm) == 0;
mp_hal_pin_config(dp, MP_HAL_PIN_MODE_INPUT, MP_HAL_PIN_PULL_NONE, 0);
mp_hal_pin_config(dm, MP_HAL_PIN_MODE_INPUT, MP_HAL_PIN_PULL_NONE, 0);
if (state) {
// DP and DM pins are actively held low so assume USB is connected
return i == 0 ? USB_PHY_FS_ID : USB_PHY_HS_ID;
}
}
#endif
return MICROPY_HW_USB_MAIN_DEV;
}
bool pyb_usb_dev_init(int dev_id, uint16_t vid, uint16_t pid, uint8_t mode, size_t msc_n, const void *msc_unit, USBD_HID_ModeInfoTypeDef *hid_info) {
usb_device_t *usb_dev = &usb_device;
if (!usb_dev->enabled) {
// only init USB once in the device's power-lifetime
// set up the USBD state
USBD_HandleTypeDef *usbd = &usb_dev->hUSBDDevice;
usbd->id = dev_id;
usbd->dev_state = USBD_STATE_DEFAULT;
usbd->pDesc = (USBD_DescriptorsTypeDef*)&USBD_Descriptors;
usbd->pClass = &USBD_CDC_MSC_HID;
usb_dev->usbd_cdc_msc_hid_state.pdev = usbd;
for (int i = 0; i < MICROPY_HW_USB_CDC_NUM; ++i) {
usb_dev->usbd_cdc_msc_hid_state.cdc[i] = &usb_dev->usbd_cdc_itf[i].base;
}
#if MICROPY_HW_USB_HID
usb_dev->usbd_cdc_msc_hid_state.hid = &usb_dev->usbd_hid_itf.base;
#endif
usbd->pClassData = &usb_dev->usbd_cdc_msc_hid_state;
// configure the VID, PID and the USBD mode (interfaces it will expose)
int cdc_only = (mode & USBD_MODE_IFACE_MASK) == USBD_MODE_CDC;
USBD_SetVIDPIDRelease(&usb_dev->usbd_cdc_msc_hid_state, vid, pid, 0x0200, cdc_only);
if (USBD_SelectMode(&usb_dev->usbd_cdc_msc_hid_state, mode, hid_info) != 0) {
return false;
}
#if MICROPY_HW_USB_MSC
// Configure the MSC interface
const void *msc_unit_default[1];
if (msc_n == 0) {
msc_n = 1;
msc_unit = msc_unit_default;
switch (pyb_usb_storage_medium) {
#if MICROPY_HW_ENABLE_SDCARD
case PYB_USB_STORAGE_MEDIUM_SDCARD:
msc_unit_default[0] = &pyb_sdcard_type;
break;
#endif
default:
msc_unit_default[0] = &pyb_flash_type;
break;
}
}
usbd_msc_init_lu(msc_n, msc_unit);
USBD_MSC_RegisterStorage(&usb_dev->usbd_cdc_msc_hid_state, (USBD_StorageTypeDef*)&usbd_msc_fops);
#endif
// start the USB device
USBD_LL_Init(usbd, (mode & USBD_MODE_HIGH_SPEED) != 0);
USBD_LL_Start(usbd);
usb_dev->enabled = true;
}
return true;
}
void pyb_usb_dev_deinit(void) {
usb_device_t *usb_dev = &usb_device;
if (usb_dev->enabled) {
USBD_Stop(&usb_dev->hUSBDDevice);
USBD_DeInit(&usb_dev->hUSBDDevice);
usb_dev->enabled = false;
}
}
bool usb_vcp_is_enabled(void) {
return usb_device.enabled;
}
int usb_vcp_recv_byte(uint8_t *c) {
return usbd_cdc_rx(&usb_device.usbd_cdc_itf[0], c, 1, 0);
}
void usb_vcp_send_strn(const char *str, int len) {
if (usb_device.enabled) {
usbd_cdc_tx_always(&usb_device.usbd_cdc_itf[0], (const uint8_t*)str, len);
}
}
usbd_cdc_itf_t *usb_vcp_get(int idx) {
return &usb_device.usbd_cdc_itf[idx];
}
/******************************************************************************/
// MicroPython bindings for USB
/*
Philosophy of USB driver and Python API: pyb.usb_mode(...) configures the USB
on the board. The USB itself is not an entity, rather the interfaces are, and
can be accessed by creating objects, such as pyb.USB_VCP() and pyb.USB_HID().
We have:
pyb.usb_mode() # return the current usb mode
pyb.usb_mode(None) # disable USB
pyb.usb_mode('VCP') # enable with VCP interface
pyb.usb_mode('VCP+MSC') # enable with VCP and MSC interfaces
pyb.usb_mode('VCP+HID') # enable with VCP and HID, defaulting to mouse protocol
pyb.usb_mode('VCP+HID', vid=0xf055, pid=0x9800) # specify VID and PID
pyb.usb_mode('VCP+HID', hid=pyb.hid_mouse)
pyb.usb_mode('VCP+HID', hid=pyb.hid_keyboard)
pyb.usb_mode('VCP+HID', pid=0x1234, hid=(subclass, protocol, max_packet_len, polling_interval, report_desc))
vcp = pyb.USB_VCP() # get the VCP device for read/write
hid = pyb.USB_HID() # get the HID device for write/poll
Possible extensions:
pyb.usb_mode('host', ...)
pyb.usb_mode('OTG', ...)
pyb.usb_mode(..., port=2) # for second USB port
*/
STATIC mp_obj_t pyb_usb_mode(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum {
ARG_mode, ARG_port, ARG_vid, ARG_pid,
#if MICROPY_HW_USB_MSC
ARG_msc,
#endif
#if MICROPY_HW_USB_HID
ARG_hid,
#endif
#if USBD_SUPPORT_HS_MODE
ARG_high_speed
#endif
};
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_mode, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_PTR(&mp_const_none_obj)} },
{ MP_QSTR_port, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
{ MP_QSTR_vid, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = USBD_VID} },
{ MP_QSTR_pid, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
#if MICROPY_HW_USB_MSC
{ MP_QSTR_msc, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_PTR(&mp_const_empty_tuple_obj)} },
#endif
#if MICROPY_HW_USB_HID
{ MP_QSTR_hid, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_PTR(&pyb_usb_hid_mouse_obj)} },
#endif
#if USBD_SUPPORT_HS_MODE
{ MP_QSTR_high_speed, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
#endif
};
// fetch the current usb mode -> pyb.usb_mode()
if (n_args == 0) {
#if defined(USE_HOST_MODE)
return MP_OBJ_NEW_QSTR(MP_QSTR_host);
#else
uint8_t mode = USBD_GetMode(&usb_device.usbd_cdc_msc_hid_state);
switch (mode & USBD_MODE_IFACE_MASK) {
case USBD_MODE_CDC:
return MP_OBJ_NEW_QSTR(MP_QSTR_VCP);
case USBD_MODE_MSC:
return MP_OBJ_NEW_QSTR(MP_QSTR_MSC);
case USBD_MODE_HID:
return MP_OBJ_NEW_QSTR(MP_QSTR_HID);
case USBD_MODE_CDC_MSC:
return MP_OBJ_NEW_QSTR(MP_QSTR_VCP_plus_MSC);
case USBD_MODE_CDC_HID:
return MP_OBJ_NEW_QSTR(MP_QSTR_VCP_plus_HID);
case USBD_MODE_MSC_HID:
return MP_OBJ_NEW_QSTR(MP_QSTR_MSC_plus_HID);
default:
return mp_const_none;
}
#endif
}
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
// record the fact that the usb has been explicitly configured
pyb_usb_flags |= PYB_USB_FLAG_USB_MODE_CALLED;
// check if user wants to disable the USB
if (args[ARG_mode].u_obj == mp_const_none) {
// disable usb
pyb_usb_dev_deinit();
return mp_const_none;
}
// get mode string
const char *mode_str = mp_obj_str_get_str(args[ARG_mode].u_obj);
#if defined(USE_HOST_MODE)
// hardware configured for USB host mode
if (strcmp(mode_str, "host") == 0) {
pyb_usb_host_init();
} else {
goto bad_mode;
}
#else
// hardware configured for USB device mode
// get the VID, PID and USB mode
// note: PID=-1 means select PID based on mode
// note: we support CDC as a synonym for VCP for backward compatibility
uint16_t vid = args[ARG_vid].u_int;
mp_int_t pid = args[ARG_pid].u_int;
uint8_t mode;
if (strcmp(mode_str, "CDC+MSC") == 0 || strcmp(mode_str, "VCP+MSC") == 0) {
if (pid == -1) {
pid = USBD_PID_CDC_MSC;
}
mode = USBD_MODE_CDC_MSC;
#if MICROPY_HW_USB_CDC_NUM >= 2
} else if (strcmp(mode_str, "VCP+VCP") == 0) {
if (pid == -1) {
pid = USBD_PID_CDC2;
}
mode = USBD_MODE_CDC2;
} else if (strcmp(mode_str, "VCP+VCP+MSC") == 0) {
if (pid == -1) {
pid = USBD_PID_CDC2_MSC;
}
mode = USBD_MODE_CDC2_MSC;
#endif
#if MICROPY_HW_USB_CDC_NUM >= 3
} else if (strcmp(mode_str, "3xVCP") == 0) {
if (pid == -1) {
pid = USBD_PID_CDC3;
}
mode = USBD_MODE_CDC3;
} else if (strcmp(mode_str, "3xVCP+MSC") == 0) {
if (pid == -1) {
pid = USBD_PID_CDC3_MSC;
}
mode = USBD_MODE_CDC3_MSC;
#endif
} else if (strcmp(mode_str, "CDC+HID") == 0 || strcmp(mode_str, "VCP+HID") == 0) {
if (pid == -1) {
pid = USBD_PID_CDC_HID;
}
mode = USBD_MODE_CDC_HID;
} else if (strcmp(mode_str, "CDC") == 0 || strcmp(mode_str, "VCP") == 0) {
if (pid == -1) {
pid = USBD_PID_CDC;
}
mode = USBD_MODE_CDC;
} else if (strcmp(mode_str, "MSC") == 0) {
if (pid == -1) {
pid = USBD_PID_MSC;
}
mode = USBD_MODE_MSC;
} else {
goto bad_mode;
}
// Get MSC logical units
size_t msc_n = 0;
const void *msc_unit[USBD_MSC_MAX_LUN];
#if MICROPY_HW_USB_MSC
if (mode & USBD_MODE_IFACE_MSC) {
mp_obj_t *items;
mp_obj_get_array(args[ARG_msc].u_obj, &msc_n, &items);
if (msc_n > USBD_MSC_MAX_LUN) {
mp_raise_ValueError("too many logical units");
}
for (size_t i = 0; i < msc_n; ++i) {
mp_obj_type_t *type = mp_obj_get_type(items[i]);
if (type == &pyb_flash_type
#if MICROPY_HW_ENABLE_SDCARD
|| type == &pyb_sdcard_type
#endif
#if MICROPY_HW_ENABLE_MMCARD
|| type == &pyb_mmcard_type
#endif
) {
msc_unit[i] = type;
} else {
mp_raise_ValueError("unsupported logical unit");
}
}
}
#endif
// get hid info if user selected such a mode
USBD_HID_ModeInfoTypeDef hid_info;
#if MICROPY_HW_USB_HID
if (mode & USBD_MODE_IFACE_HID) {
mp_obj_t *items;
mp_obj_get_array_fixed_n(args[ARG_hid].u_obj, 5, &items);
hid_info.subclass = mp_obj_get_int(items[0]);
hid_info.protocol = mp_obj_get_int(items[1]);
hid_info.max_packet_len = mp_obj_get_int(items[2]);
hid_info.polling_interval = mp_obj_get_int(items[3]);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(items[4], &bufinfo, MP_BUFFER_READ);
hid_info.report_desc = bufinfo.buf;
hid_info.report_desc_len = bufinfo.len;
// need to keep a copy of this so report_desc does not get GC'd
MP_STATE_PORT(pyb_hid_report_desc) = items[4];
}
#endif
#if USBD_SUPPORT_HS_MODE
if (args[ARG_high_speed].u_bool) {
mode |= USBD_MODE_HIGH_SPEED;
}
#endif
// Work out which port/peripheral to use, either user supplied or auto detect
int dev_id = args[ARG_port].u_int;
if (dev_id == -1) {
dev_id = pyb_usb_dev_detect();
}
// init the USB device
if (!pyb_usb_dev_init(dev_id, vid, pid, mode, msc_n, msc_unit, &hid_info)) {
goto bad_mode;
}
#endif
return mp_const_none;
bad_mode:
mp_raise_ValueError("bad USB mode");
}
MP_DEFINE_CONST_FUN_OBJ_KW(pyb_usb_mode_obj, 0, pyb_usb_mode);
/******************************************************************************/
// MicroPython 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;
usbd_cdc_itf_t *cdc_itf;
} pyb_usb_vcp_obj_t;
const pyb_usb_vcp_obj_t pyb_usb_vcp_obj[MICROPY_HW_USB_CDC_NUM] = {
{{&pyb_usb_vcp_type}, &usb_device.usbd_cdc_itf[0]},
#if MICROPY_HW_USB_CDC_NUM >= 2
{{&pyb_usb_vcp_type}, &usb_device.usbd_cdc_itf[1]},
#endif
#if MICROPY_HW_USB_CDC_NUM >= 3
{{&pyb_usb_vcp_type}, &usb_device.usbd_cdc_itf[2]},
#endif
};
STATIC void pyb_usb_vcp_init0(void) {
// Activate USB_VCP(0) on dupterm slot 1 for the REPL
MP_STATE_VM(dupterm_objs[1]) = MP_OBJ_FROM_PTR(&pyb_usb_vcp_obj[0]);
usb_vcp_attach_to_repl(&pyb_usb_vcp_obj[0], true);
}
STATIC void pyb_usb_vcp_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
int id = ((pyb_usb_vcp_obj_t*)MP_OBJ_TO_PTR(self_in))->cdc_itf - &usb_device.usbd_cdc_itf[0];
mp_printf(print, "USB_VCP(%u)", id);
}
void usb_vcp_attach_to_repl(const pyb_usb_vcp_obj_t *self, bool attached) {
self->cdc_itf->attached_to_repl = attached;
}
/// \classmethod \constructor()
/// Create a new USB_VCP object.
STATIC mp_obj_t pyb_usb_vcp_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
// check arguments
mp_arg_check_num(n_args, n_kw, 0, 1, false);
// TODO raise exception if USB is not configured for VCP
int id = (n_args == 0) ? 0 : mp_obj_get_int(args[0]);
if (0 <= id && id < MICROPY_HW_USB_CDC_NUM) {
return MP_OBJ_FROM_PTR(&pyb_usb_vcp_obj[id]);
} else {
mp_raise_ValueError(NULL);
}
}
// init(*, flow=-1)
STATIC mp_obj_t pyb_usb_vcp_init(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_flow };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_flow, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
pyb_usb_vcp_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
// flow control
if (args[ARG_flow].u_int != -1) {
self->cdc_itf->flow = args[ARG_flow].u_int;
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_usb_vcp_init_obj, 1, pyb_usb_vcp_init);
STATIC mp_obj_t pyb_usb_vcp_setinterrupt(mp_obj_t self_in, mp_obj_t int_chr_in) {
mp_hal_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);
STATIC mp_obj_t pyb_usb_vcp_isconnected(mp_obj_t self_in) {
pyb_usb_vcp_obj_t *self = MP_OBJ_TO_PTR(self_in);
return mp_obj_new_bool(usbd_cdc_is_connected(self->cdc_itf));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_usb_vcp_isconnected_obj, pyb_usb_vcp_isconnected);
// deprecated in favour of USB_VCP.isconnected
STATIC mp_obj_t pyb_have_cdc(void) {
return pyb_usb_vcp_isconnected(MP_OBJ_FROM_PTR(&pyb_usb_vcp_obj[0]));
}
MP_DEFINE_CONST_FUN_OBJ_0(pyb_have_cdc_obj, pyb_have_cdc);
/// \method any()
/// Return `True` if any characters waiting, else `False`.
STATIC mp_obj_t pyb_usb_vcp_any(mp_obj_t self_in) {
pyb_usb_vcp_obj_t *self = MP_OBJ_TO_PTR(self_in);
if (usbd_cdc_rx_num(self->cdc_itf) > 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(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
// parse args
pyb_usb_vcp_obj_t *self = MP_OBJ_TO_PTR(args[0]);
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(self->cdc_itf, 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(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
// parse args
pyb_usb_vcp_obj_t *self = MP_OBJ_TO_PTR(args[0]);
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(self->cdc_itf, (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 {
vstr.len = ret; // set actual number of bytes read
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__(size_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_rom_map_elem_t pyb_usb_vcp_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&pyb_usb_vcp_init_obj) },
{ MP_ROM_QSTR(MP_QSTR_setinterrupt), MP_ROM_PTR(&pyb_usb_vcp_setinterrupt_obj) },
{ MP_ROM_QSTR(MP_QSTR_isconnected), MP_ROM_PTR(&pyb_usb_vcp_isconnected_obj) },
{ MP_ROM_QSTR(MP_QSTR_any), MP_ROM_PTR(&pyb_usb_vcp_any_obj) },
{ MP_ROM_QSTR(MP_QSTR_send), MP_ROM_PTR(&pyb_usb_vcp_send_obj) },
{ MP_ROM_QSTR(MP_QSTR_recv), MP_ROM_PTR(&pyb_usb_vcp_recv_obj) },
{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
{ MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj)},
{ MP_ROM_QSTR(MP_QSTR_readlines), MP_ROM_PTR(&mp_stream_unbuffered_readlines_obj)},
{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
{ MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&mp_identity_obj) },
{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&mp_identity_obj) },
{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&mp_identity_obj) },
{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&pyb_usb_vcp___exit___obj) },
// class constants
{ MP_ROM_QSTR(MP_QSTR_RTS), MP_ROM_INT(USBD_CDC_FLOWCONTROL_RTS) },
};
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) {
pyb_usb_vcp_obj_t *self = MP_OBJ_TO_PTR(self_in);
int ret = usbd_cdc_rx(self->cdc_itf, (byte*)buf, size, 0);
if (ret == 0) {
// return EAGAIN error to indicate non-blocking
*errcode = MP_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) {
pyb_usb_vcp_obj_t *self = MP_OBJ_TO_PTR(self_in);
if (self->cdc_itf->attached_to_repl) {
usbd_cdc_tx_always(self->cdc_itf, (const byte*)buf, size);
return size;
} else {
int ret = usbd_cdc_tx(self->cdc_itf, (const byte*)buf, size, 0);
if (ret == 0) {
// return EAGAIN error to indicate non-blocking
*errcode = MP_EAGAIN;
return MP_STREAM_ERROR;
}
return ret;
}
}
STATIC mp_uint_t pyb_usb_vcp_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode) {
mp_uint_t ret;
pyb_usb_vcp_obj_t *self = MP_OBJ_TO_PTR(self_in);
if (request == MP_STREAM_POLL) {
uintptr_t flags = arg;
ret = 0;
if ((flags & MP_STREAM_POLL_RD) && usbd_cdc_rx_num(self->cdc_itf) > 0) {
ret |= MP_STREAM_POLL_RD;
}
if ((flags & MP_STREAM_POLL_WR) && usbd_cdc_tx_half_empty(self->cdc_itf)) {
ret |= MP_STREAM_POLL_WR;
}
} else {
*errcode = MP_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_getiter,
.iternext = mp_stream_unbuffered_iter,
.protocol = &pyb_usb_vcp_stream_p,
.locals_dict = (mp_obj_dict_t*)&pyb_usb_vcp_locals_dict,
};
/******************************************************************************/
// MicroPython bindings for USB HID
#if MICROPY_HW_USB_HID
typedef struct _pyb_usb_hid_obj_t {
mp_obj_base_t base;
usb_device_t *usb_dev;
} pyb_usb_hid_obj_t;
STATIC const pyb_usb_hid_obj_t pyb_usb_hid_obj = {{&pyb_usb_hid_type}, &usb_device};
STATIC mp_obj_t pyb_usb_hid_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
// check arguments
mp_arg_check_num(n_args, n_kw, 0, 0, false);
// TODO raise exception if USB is not configured for HID
// return the USB HID object
return MP_OBJ_FROM_PTR(&pyb_usb_hid_obj);
}
/// \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_hid_recv(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
static const mp_arg_t allowed_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} },
};
// parse args
pyb_usb_hid_obj_t *self = MP_OBJ_TO_PTR(args[0]);
mp_arg_val_t vals[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_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_hid_rx(&self->usb_dev->usbd_hid_itf, vstr.len, (uint8_t*)vstr.buf, vals[1].u_int);
if (ret < 0) {
// error, just return 0/empty bytes
ret = 0;
}
// return the received data
if (o_ret != MP_OBJ_NULL) {
return mp_obj_new_int(ret); // number of bytes read into given buffer
} else {
vstr.len = ret; // set actual number of bytes read
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr); // create a new buffer
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_usb_hid_recv_obj, 1, pyb_usb_hid_recv);
STATIC mp_obj_t pyb_usb_hid_send(mp_obj_t self_in, mp_obj_t report_in) {
pyb_usb_hid_obj_t *self = MP_OBJ_TO_PTR(self_in);
mp_buffer_info_t bufinfo;
byte temp_buf[8];
// get the buffer to send from
// we accept either a byte array, or a tuple/list of integers
if (!mp_get_buffer(report_in, &bufinfo, MP_BUFFER_READ)) {
mp_obj_t *items;
mp_obj_get_array(report_in, &bufinfo.len, &items);
if (bufinfo.len > sizeof(temp_buf)) {
mp_raise_ValueError("tuple/list too large for HID report; use bytearray instead");
}
for (int i = 0; i < bufinfo.len; i++) {
temp_buf[i] = mp_obj_get_int(items[i]);
}
bufinfo.buf = temp_buf;
}
// send the data
if (USBD_OK == USBD_HID_SendReport(&self->usb_dev->usbd_hid_itf.base, bufinfo.buf, bufinfo.len)) {
return mp_obj_new_int(bufinfo.len);
} else {
return mp_obj_new_int(0);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(pyb_usb_hid_send_obj, pyb_usb_hid_send);
// deprecated in favour of USB_HID.send
STATIC mp_obj_t pyb_hid_send_report(mp_obj_t arg) {
return pyb_usb_hid_send(MP_OBJ_FROM_PTR(&pyb_usb_hid_obj), arg);
}
MP_DEFINE_CONST_FUN_OBJ_1(pyb_hid_send_report_obj, pyb_hid_send_report);
STATIC const mp_rom_map_elem_t pyb_usb_hid_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_send), MP_ROM_PTR(&pyb_usb_hid_send_obj) },
{ MP_ROM_QSTR(MP_QSTR_recv), MP_ROM_PTR(&pyb_usb_hid_recv_obj) },
};
STATIC MP_DEFINE_CONST_DICT(pyb_usb_hid_locals_dict, pyb_usb_hid_locals_dict_table);
STATIC mp_uint_t pyb_usb_hid_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode) {
pyb_usb_hid_obj_t *self = MP_OBJ_TO_PTR(self_in);
mp_uint_t ret;
if (request == MP_STREAM_POLL) {
uintptr_t flags = arg;
ret = 0;
if ((flags & MP_STREAM_POLL_RD) && usbd_hid_rx_num(&self->usb_dev->usbd_hid_itf) > 0) {
ret |= MP_STREAM_POLL_RD;
}
if ((flags & MP_STREAM_POLL_WR) && USBD_HID_CanSendReport(&self->usb_dev->usbd_hid_itf.base)) {
ret |= MP_STREAM_POLL_WR;
}
} else {
*errcode = MP_EINVAL;
ret = MP_STREAM_ERROR;
}
return ret;
}
STATIC const mp_stream_p_t pyb_usb_hid_stream_p = {
.ioctl = pyb_usb_hid_ioctl,
};
const mp_obj_type_t pyb_usb_hid_type = {
{ &mp_type_type },
.name = MP_QSTR_USB_HID,
.make_new = pyb_usb_hid_make_new,
.protocol = &pyb_usb_hid_stream_p,
.locals_dict = (mp_obj_dict_t*)&pyb_usb_hid_locals_dict,
};
#endif // MICROPY_HW_USB_HID
/******************************************************************************/
// 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
#endif // MICROPY_HW_ENABLE_USB
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