Paparazzi UAS  v5.15_devel-99-g2ff7410
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usb_ser_hw.c File Reference

CDC USB device driver for STM32 architecture (STM32F1, STM32F4) More...

#include <stdlib.h>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/cm3/systick.h>
#include <libopencm3/usb/usbd.h>
#include <libopencm3/usb/cdc.h>
#include <libopencm3/cm3/scb.h>
#include <libopencm3/stm32/desig.h>
#include <libopencm3/stm32/otg_fs.h>
#include "mcu_periph/usb_serial.h"
#include "mcu_periph/sys_time_arch.h"
+ Include dependency graph for usb_ser_hw.c:

Go to the source code of this file.

Data Structures

struct  fifo_t
 

Macros

#define MAX_PACKET_SIZE   64
 
#define VCOM_FIFO_SIZE   256
 
#define TX_TIMEOUT_CNT   20
 

Functions

void fifo_init (fifo_t *fifo, uint8_t *buf)
 
bool fifo_put (fifo_t *fifo, uint8_t c)
 
bool fifo_get (fifo_t *fifo, uint8_t *pc)
 
int fifo_avail (fifo_t *fifo)
 
int fifo_free (fifo_t *fifo)
 
static int cdcacm_control_request (usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf, uint16_t *len, void(**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
 CDC device control request (from libopencm3 examples) More...
 
static void cdcacm_data_rx_cb (usbd_device *usbd_dev, uint8_t ep)
 RX callback for CDC device (from libopencm3 examples) More...
 
static void suspend_cb (void)
 
static void cdcacm_set_config (usbd_device *usbd_dev, uint16_t wValue)
 Set configuration and control callbacks for CDC device (from libopencm3 examples) More...
 
int VCOM_putchar (int c)
 Writes one character to VCOM port fifo. More...
 
int VCOM_getchar (void)
 Reads one character from VCOM port. More...
 
bool VCOM_check_free_space (uint16_t len)
 Checks if buffer free in VCOM buffer. More...
 
int VCOM_check_available (void)
 Checks if data available in VCOM buffer. More...
 
void VCOM_event (void)
 Poll usb (required by libopencm3). More...
 
void VCOM_send_message (void)
 Send data from fifo right now. More...
 
static int usb_serial_check_free_space (struct usb_serial_periph *p, long *fd, uint16_t len)
 
static void usb_serial_transmit (struct usb_serial_periph *p, long fd, uint8_t byte)
 
static void usb_serial_transmit_buffer (struct usb_serial_periph *p, long fd, uint8_t *data, uint16_t len)
 
static void usb_serial_send (struct usb_serial_periph *p, long fd)
 
static int usb_serial_char_available (struct usb_serial_periph *p)
 
static uint8_t usb_serial_getch (struct usb_serial_periph *p)
 
void VCOM_init (void)
 

Variables

static uint8_t txdata [VCOM_FIFO_SIZE]
 
static uint8_t rxdata [VCOM_FIFO_SIZE]
 
static fifo_t txfifo
 
static fifo_t rxfifo
 
int tx_timeout
 
usbd_device * my_usbd_dev
 
static const struct
usb_device_descriptor 
dev
 
static const struct
usb_endpoint_descriptor 
comm_endp []
 
static const struct
usb_endpoint_descriptor 
data_endp []
 
struct {
struct usb_cdc_header_descriptor header
 
struct
usb_cdc_call_management_descriptor 
call_mgmt
 
struct usb_cdc_acm_descriptor acm
 
struct usb_cdc_union_descriptor cdc_union
 
cdcacm_functional_descriptors
 
static const struct
usb_interface_descriptor 
comm_iface []
 
static const struct
usb_interface_descriptor 
data_iface []
 
static const struct usb_interface ifaces []
 
static const struct
usb_config_descriptor 
config
 
static char serial_no [25]
 
static const char * usb_strings []
 
uint8_t usbd_control_buffer [128]
 
static bool usb_connected
 
struct usb_serial_periph usb_serial
 

Detailed Description

CDC USB device driver for STM32 architecture (STM32F1, STM32F4)

Definition in file usb_ser_hw.c.


Data Structure Documentation

struct fifo_t

Definition at line 90 of file usb_ser_hw.c.

Data Fields
uint8_t * buf
int head
int tail

Macro Definition Documentation

#define MAX_PACKET_SIZE   64

Definition at line 46 of file usb_ser_hw.c.

Referenced by cdcacm_data_rx_cb(), cdcacm_set_config(), and VCOM_send_message().

#define TX_TIMEOUT_CNT   20

Definition at line 50 of file usb_ser_hw.c.

Referenced by VCOM_putchar().

#define VCOM_FIFO_SIZE   256

Definition at line 48 of file usb_ser_hw.c.

Referenced by fifo_avail(), fifo_free(), fifo_get(), and fifo_put().

Function Documentation

static int cdcacm_control_request ( usbd_device *  usbd_dev,
struct usb_setup_data *  req,
uint8_t **  buf,
uint16_t len,
void(**)(usbd_device *usbd_dev, struct usb_setup_data *req)  complete 
)
static

CDC device control request (from libopencm3 examples)

Definition at line 232 of file usb_ser_hw.c.

Referenced by cdcacm_set_config().

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static void cdcacm_data_rx_cb ( usbd_device *  usbd_dev,
uint8_t  ep 
)
static

RX callback for CDC device (from libopencm3 examples)

Definition at line 275 of file usb_ser_hw.c.

References fifo_put(), and MAX_PACKET_SIZE.

Referenced by cdcacm_set_config().

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static void cdcacm_set_config ( usbd_device *  usbd_dev,
uint16_t  wValue 
)
static

Set configuration and control callbacks for CDC device (from libopencm3 examples)

Definition at line 302 of file usb_ser_hw.c.

References cdcacm_control_request(), cdcacm_data_rx_cb(), MAX_PACKET_SIZE, and suspend_cb().

Referenced by VCOM_init().

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int fifo_avail ( fifo_t fifo)

Definition at line 366 of file usb_ser_hw.c.

References fifo_t::head, fifo_t::tail, and VCOM_FIFO_SIZE.

int fifo_free ( fifo_t fifo)

Definition at line 372 of file usb_ser_hw.c.

References fifo_avail(), and VCOM_FIFO_SIZE.

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bool fifo_get ( fifo_t fifo,
uint8_t pc 
)

Definition at line 348 of file usb_ser_hw.c.

References fifo_t::buf, fifo_t::head, fifo_t::tail, and VCOM_FIFO_SIZE.

void fifo_init ( fifo_t fifo,
uint8_t buf 
)

Definition at line 321 of file usb_ser_hw.c.

References fifo_t::buf, fifo_t::head, and fifo_t::tail.

bool fifo_put ( fifo_t fifo,
uint8_t  c 
)

Definition at line 330 of file usb_ser_hw.c.

References fifo_t::buf, fifo_t::head, fifo_t::tail, and VCOM_FIFO_SIZE.

static void suspend_cb ( void  )
static

Definition at line 293 of file usb_ser_hw.c.

Referenced by cdcacm_set_config().

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static int usb_serial_char_available ( struct usb_serial_periph p)
static

Definition at line 532 of file usb_ser_hw.c.

References VCOM_check_available().

Referenced by VCOM_init().

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static int usb_serial_check_free_space ( struct usb_serial_periph p,
long *  fd,
uint16_t  len 
)
static

Definition at line 503 of file usb_ser_hw.c.

References VCOM_check_free_space().

Referenced by VCOM_init().

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static uint8_t usb_serial_getch ( struct usb_serial_periph p)
static

Definition at line 537 of file usb_ser_hw.c.

References VCOM_getchar().

Referenced by VCOM_init().

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static void usb_serial_send ( struct usb_serial_periph p,
long  fd 
)
static

Definition at line 527 of file usb_ser_hw.c.

References VCOM_send_message().

Referenced by VCOM_init().

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static void usb_serial_transmit ( struct usb_serial_periph p,
long  fd,
uint8_t  byte 
)
static

Definition at line 510 of file usb_ser_hw.c.

References VCOM_putchar().

Referenced by VCOM_init().

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static void usb_serial_transmit_buffer ( struct usb_serial_periph p,
long  fd,
uint8_t data,
uint16_t  len 
)
static

Definition at line 517 of file usb_ser_hw.c.

References VCOM_putchar().

Referenced by VCOM_init().

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int VCOM_check_available ( void  )

Checks if data available in VCOM buffer.

Returns
nonzero if char is available in the queue, zero otherwise

Definition at line 436 of file usb_ser_hw.c.

References fifo_avail().

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bool VCOM_check_free_space ( uint16_t  len)

Checks if buffer free in VCOM buffer.

Returns
TRUE if len bytes are free

Definition at line 427 of file usb_ser_hw.c.

References FALSE, fifo_free(), and TRUE.

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void VCOM_event ( void  )

Poll usb (required by libopencm3).

VCOM_event() should be called from main/module event function

Definition at line 445 of file usb_ser_hw.c.

References fifo_avail(), my_usbd_dev, tx_timeout, and VCOM_send_message().

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int VCOM_getchar ( void  )

Reads one character from VCOM port.

Returns
character read, or -1 if character could not be read

Definition at line 415 of file usb_ser_hw.c.

References BULK_OUT_EP, BulkOut(), BulkOut_is_blocked, disableIRQ(), enableIRQ(), EOF, fifo_free(), fifo_get(), and MAX_PACKET_SIZE.

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int VCOM_putchar ( int  c)

Writes one character to VCOM port fifo.

Writes one character to VCOM port.

Since we don't really have an instant feeedback from USB driver if the character was written, we always return c if we are connected.

Parameters
[in]ccharacter to write
Returns
character to be written, -1 if not usb is not connected

Definition at line 387 of file usb_ser_hw.c.

References EOF, fifo_put(), sys_time_usleep(), tx_timeout, TX_TIMEOUT_CNT, VCOM_check_free_space(), and VCOM_send_message().

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void VCOM_send_message ( void  )

Send data from fifo right now.

Only if usb is connected.

Definition at line 464 of file usb_ser_hw.c.

References fifo_get(), MAX_PACKET_SIZE, and my_usbd_dev.

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Variable Documentation

const { ... } cdcacm_functional_descriptors
Initial value:
= {
.header = {
.bFunctionLength = sizeof(struct usb_cdc_header_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_HEADER,
.bcdCDC = 0x0110,
},
.call_mgmt = {
.bFunctionLength =
sizeof(struct usb_cdc_call_management_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_CALL_MANAGEMENT,
.bmCapabilities = 0,
.bDataInterface = 1,
},
.acm = {
.bFunctionLength = sizeof(struct usb_cdc_acm_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_ACM,
.bmCapabilities = 0,
},
.cdc_union = {
.bFunctionLength = sizeof(struct usb_cdc_union_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_UNION,
.bControlInterface = 0,
.bSubordinateInterface0 = 1,
}
}
#define CS_INTERFACE
Definition: usb_ser_hw.c:78
const struct usb_endpoint_descriptor comm_endp[]
static
Initial value:
= {{
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0x83,
.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
.wMaxPacketSize = 16,
.bInterval = 255,
}
}

Definition at line 95 of file usb_ser_hw.c.

const struct usb_interface_descriptor comm_iface[]
static
Initial value:
= {{
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 0,
.bAlternateSetting = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_CDC,
.bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
.bInterfaceProtocol = USB_CDC_PROTOCOL_AT,
.iInterface = 0,
.endpoint = comm_endp,
.extralen = sizeof(cdcacm_functional_descriptors)
}
}
static const struct @17 cdcacm_functional_descriptors
static const struct usb_endpoint_descriptor comm_endp[]
Definition: usb_ser_hw.c:95

Definition at line 157 of file usb_ser_hw.c.

const struct usb_config_descriptor config
static
Initial value:
= {
.bLength = USB_DT_CONFIGURATION_SIZE,
.bDescriptorType = USB_DT_CONFIGURATION,
.wTotalLength = 0,
.bNumInterfaces = 2,
.bConfigurationValue = 1,
.iConfiguration = 0,
.bmAttributes = 0x80,
.bMaxPower = 0x32,
.interface = ifaces,
}
static const struct usb_interface ifaces[]
Definition: usb_ser_hw.c:190

Definition at line 199 of file usb_ser_hw.c.

Referenced by dshotStart(), and msdStart().

const struct usb_endpoint_descriptor data_endp[]
static
Initial value:
= {{
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0x01,
.bmAttributes = USB_ENDPOINT_ATTR_BULK,
.wMaxPacketSize = MAX_PACKET_SIZE,
.bInterval = 1,
}, {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0x82,
.bmAttributes = USB_ENDPOINT_ATTR_BULK,
.wMaxPacketSize = MAX_PACKET_SIZE,
.bInterval = 1,
}
}
#define MAX_PACKET_SIZE
Definition: usb_ser_hw.c:46

Definition at line 105 of file usb_ser_hw.c.

const struct usb_interface_descriptor data_iface[]
static
Initial value:
= {{
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 1,
.bAlternateSetting = 0,
.bNumEndpoints = 2,
.bInterfaceClass = USB_CLASS_DATA,
.bInterfaceSubClass = 0,
.bInterfaceProtocol = 0,
.iInterface = 0,
.endpoint = data_endp,
}
}
static const struct usb_endpoint_descriptor data_endp[]
Definition: usb_ser_hw.c:105

Definition at line 175 of file usb_ser_hw.c.

const struct usb_device_descriptor dev
static
Initial value:
= {
.bLength = USB_DT_DEVICE_SIZE,
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = 0x0200,
.bDeviceClass = USB_CLASS_CDC,
.bDeviceSubClass = 0,
.bDeviceProtocol = 0,
.bMaxPacketSize0 = MAX_PACKET_SIZE,
.idVendor = 0x1d50,
.idProduct = 0x603d,
.bcdDevice = 0x0200,
.iManufacturer = 1,
.iProduct = 2,
.iSerialNumber = 3,
.bNumConfigurations = 1,
}
#define MAX_PACKET_SIZE
Definition: usb_ser_hw.c:46

Definition at line 73 of file usb_ser_hw.c.

Referenced by dl_parse_msg(), firmware_parse_msg(), gps_mtk_event(), gps_nmea_event(), gps_sirf_event(), gps_skytraq_event(), gps_ubx_event(), ins_event_check_and_handle(), parse_ins_msg(), send_airspeed(), send_gps(), send_gps_int(), send_gps_lla(), send_i2c_err(), send_uart_err(), telemetry_intermcu_repack(), v4l2_capture_thread(), v4l2_init(), VCOM_init(), and xsens_parser_event().

const struct usb_interface ifaces[]
static
Initial value:
= {{
.num_altsetting = 1,
.altsetting = comm_iface,
}, {
.num_altsetting = 1,
.altsetting = data_iface,
}
}
static const struct usb_interface_descriptor comm_iface[]
Definition: usb_ser_hw.c:157
static const struct usb_interface_descriptor data_iface[]
Definition: usb_ser_hw.c:175

Definition at line 190 of file usb_ser_hw.c.

usbd_device* my_usbd_dev

Definition at line 71 of file usb_ser_hw.c.

Referenced by VCOM_event(), VCOM_init(), and VCOM_send_message().

uint8_t rxdata[VCOM_FIFO_SIZE]
static

Definition at line 59 of file usb_ser_hw.c.

Referenced by VCOM_init().

fifo_t rxfifo
static

Definition at line 62 of file usb_ser_hw.c.

char serial_no[25]
static

Definition at line 212 of file usb_ser_hw.c.

int tx_timeout

Definition at line 69 of file usb_ser_hw.c.

Referenced by VCOM_event(), VCOM_init(), and VCOM_putchar().

uint8_t txdata[VCOM_FIFO_SIZE]
static

Definition at line 58 of file usb_ser_hw.c.

Referenced by VCOM_init().

fifo_t txfifo
static

Definition at line 61 of file usb_ser_hw.c.

bool usb_connected
static

Definition at line 290 of file usb_ser_hw.c.

struct usb_serial_periph usb_serial

Definition at line 500 of file usb_ser_hw.c.

const char* usb_strings[]
static
Initial value:
= {
"Paparazzi UAV",
"CDC Serial STM32",
}
static char serial_no[25]
Definition: usb_ser_hw.c:212

Definition at line 215 of file usb_ser_hw.c.

uint8_t usbd_control_buffer[128]

Definition at line 226 of file usb_ser_hw.c.