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// NOTE: this file is created from the USB_CDC testhal example
#include "ch.h"
#include "hal.h"
#include "stm32f4xx_conf.h"
/*
* Endpoints to be used for USBD2.
*/
#define USBD2_DATA_REQUEST_EP 1
#define USBD2_DATA_AVAILABLE_EP 1
#define USBD2_INTERRUPT_REQUEST_EP 2
/*
* Serial over USB Driver structure.
*/
SerialUSBDriver SDU1;
/*
* USB Device Descriptor.
*/
static const uint8_t vcom_device_descriptor_data[18] = {
USB_DESC_DEVICE (0x0110, /* bcdUSB (1.1). */
0x02, /* bDeviceClass (CDC). */
0x00, /* bDeviceSubClass. */
0x00, /* bDeviceProtocol. */
0x40, /* bMaxPacketSize. */
0x0483, /* idVendor (ST). */
0x5740, /* idProduct. */
0x0200, /* bcdDevice. */
1, /* iManufacturer. */
2, /* iProduct. */
3, /* iSerialNumber. */
1) /* bNumConfigurations. */
};
/*
* Device Descriptor wrapper.
*/
static const USBDescriptor vcom_device_descriptor = {
sizeof vcom_device_descriptor_data,
vcom_device_descriptor_data
};
/* Configuration Descriptor tree for a CDC.*/
static const uint8_t vcom_configuration_descriptor_data[67] = {
/* Configuration Descriptor.*/
USB_DESC_CONFIGURATION(67, /* wTotalLength. */
0x02, /* bNumInterfaces. */
0x01, /* bConfigurationValue. */
0, /* iConfiguration. */
0xC0, /* bmAttributes (self powered). */
50), /* bMaxPower (100mA). */
/* Interface Descriptor.*/
USB_DESC_INTERFACE (0x00, /* bInterfaceNumber. */
0x00, /* bAlternateSetting. */
0x01, /* bNumEndpoints. */
0x02, /* bInterfaceClass (Communications
Interface Class, CDC section
4.2). */
0x02, /* bInterfaceSubClass (Abstract
Control Model, CDC section 4.3). */
0x01, /* bInterfaceProtocol (AT commands,
CDC section 4.4). */
0), /* iInterface. */
/* Header Functional Descriptor (CDC section 5.2.3).*/
USB_DESC_BYTE (5), /* bLength. */
USB_DESC_BYTE (0x24), /* bDescriptorType (CS_INTERFACE). */
USB_DESC_BYTE (0x00), /* bDescriptorSubtype (Header
Functional Descriptor. */
USB_DESC_BCD (0x0110), /* bcdCDC. */
/* Call Management Functional Descriptor. */
USB_DESC_BYTE (5), /* bFunctionLength. */
USB_DESC_BYTE (0x24), /* bDescriptorType (CS_INTERFACE). */
USB_DESC_BYTE (0x01), /* bDescriptorSubtype (Call Management
Functional Descriptor). */
USB_DESC_BYTE (0x00), /* bmCapabilities (D0+D1). */
USB_DESC_BYTE (0x01), /* bDataInterface. */
/* ACM Functional Descriptor.*/
USB_DESC_BYTE (4), /* bFunctionLength. */
USB_DESC_BYTE (0x24), /* bDescriptorType (CS_INTERFACE). */
USB_DESC_BYTE (0x02), /* bDescriptorSubtype (Abstract
Control Management Descriptor). */
USB_DESC_BYTE (0x02), /* bmCapabilities. */
/* Union Functional Descriptor.*/
USB_DESC_BYTE (5), /* bFunctionLength. */
USB_DESC_BYTE (0x24), /* bDescriptorType (CS_INTERFACE). */
USB_DESC_BYTE (0x06), /* bDescriptorSubtype (Union
Functional Descriptor). */
USB_DESC_BYTE (0x00), /* bMasterInterface (Communication
Class Interface). */
USB_DESC_BYTE (0x01), /* bSlaveInterface0 (Data Class
Interface). */
/* Endpoint 2 Descriptor.*/
USB_DESC_ENDPOINT (USBD2_INTERRUPT_REQUEST_EP|0x80,
0x03, /* bmAttributes (Interrupt). */
0x0008, /* wMaxPacketSize. */
0xFF), /* bInterval. */
/* Interface Descriptor.*/
USB_DESC_INTERFACE (0x01, /* bInterfaceNumber. */
0x00, /* bAlternateSetting. */
0x02, /* bNumEndpoints. */
0x0A, /* bInterfaceClass (Data Class
Interface, CDC section 4.5). */
0x00, /* bInterfaceSubClass (CDC section
4.6). */
0x00, /* bInterfaceProtocol (CDC section
4.7). */
0x00), /* iInterface. */
/* Endpoint 3 Descriptor.*/
USB_DESC_ENDPOINT (USBD2_DATA_AVAILABLE_EP, /* bEndpointAddress.*/
0x02, /* bmAttributes (Bulk). */
0x0040, /* wMaxPacketSize. */
0x00), /* bInterval. */
/* Endpoint 1 Descriptor.*/
USB_DESC_ENDPOINT (USBD2_DATA_REQUEST_EP|0x80, /* bEndpointAddress.*/
0x02, /* bmAttributes (Bulk). */
0x0040, /* wMaxPacketSize. */
0x00) /* bInterval. */
};
/*
* Configuration Descriptor wrapper.
*/
static const USBDescriptor vcom_configuration_descriptor = {
sizeof vcom_configuration_descriptor_data,
vcom_configuration_descriptor_data
};
/*
* U.S. English language identifier.
*/
static const uint8_t vcom_string0[] = {
USB_DESC_BYTE(4), /* bLength. */
USB_DESC_BYTE(USB_DESCRIPTOR_STRING), /* bDescriptorType. */
USB_DESC_WORD(0x0409) /* wLANGID (U.S. English). */
};
/*
* Vendor string.
*/
static const uint8_t vcom_string1[] = {
USB_DESC_BYTE(38), /* bLength. */
USB_DESC_BYTE(USB_DESCRIPTOR_STRING), /* bDescriptorType. */
'S', 0, 'T', 0, 'M', 0, 'i', 0, 'c', 0, 'r', 0, 'o', 0, 'e', 0,
'l', 0, 'e', 0, 'c', 0, 't', 0, 'r', 0, 'o', 0, 'n', 0, 'i', 0,
'c', 0, 's', 0
};
/*
* Device Description string.
*/
static const uint8_t vcom_string2[] = {
USB_DESC_BYTE(56), /* bLength. */
USB_DESC_BYTE(USB_DESCRIPTOR_STRING), /* bDescriptorType. */
'C', 0, 'h', 0, 'i', 0, 'b', 0, 'i', 0, 'O', 0, 'S', 0, '/', 0,
'R', 0, 'T', 0, ' ', 0, 'V', 0, 'i', 0, 'r', 0, 't', 0, 'u', 0,
'a', 0, 'l', 0, ' ', 0, 'C', 0, 'O', 0, 'M', 0, ' ', 0, 'P', 0,
'o', 0, 'r', 0, 't', 0
};
/*
* Serial Number string.
*/
static const uint8_t vcom_string3[] = {
USB_DESC_BYTE(8), /* bLength. */
USB_DESC_BYTE(USB_DESCRIPTOR_STRING), /* bDescriptorType. */
'0' + CH_KERNEL_MAJOR, 0,
'0' + CH_KERNEL_MINOR, 0,
'0' + CH_KERNEL_PATCH, 0
};
/*
* Strings wrappers array.
*/
static const USBDescriptor vcom_strings[] = {
{sizeof vcom_string0, vcom_string0},
{sizeof vcom_string1, vcom_string1},
{sizeof vcom_string2, vcom_string2},
{sizeof vcom_string3, vcom_string3}
};
/*
* Handles the GET_DESCRIPTOR callback. All required descriptors must be
* handled here.
*/
static const USBDescriptor *get_descriptor(USBDriver *usbp,
uint8_t dtype,
uint8_t dindex,
uint16_t lang) {
(void)usbp;
(void)lang;
switch (dtype) {
case USB_DESCRIPTOR_DEVICE:
return &vcom_device_descriptor;
case USB_DESCRIPTOR_CONFIGURATION:
return &vcom_configuration_descriptor;
case USB_DESCRIPTOR_STRING:
if (dindex < 4)
return &vcom_strings[dindex];
}
return NULL;
}
/**
* @brief IN EP1 state.
*/
static USBInEndpointState ep1instate;
/**
* @brief OUT EP1 state.
*/
static USBOutEndpointState ep1outstate;
/**
* @brief EP1 initialization structure (both IN and OUT).
*/
static const USBEndpointConfig ep1config = {
USB_EP_MODE_TYPE_BULK,
NULL,
sduDataTransmitted,
sduDataReceived,
0x0040,
0x0040,
&ep1instate,
&ep1outstate,
2,
NULL
};
/**
* @brief IN EP2 state.
*/
static USBInEndpointState ep2instate;
/**
* @brief EP2 initialization structure (IN only).
*/
static const USBEndpointConfig ep2config = {
USB_EP_MODE_TYPE_INTR,
NULL,
sduInterruptTransmitted,
NULL,
0x0010,
0x0000,
&ep2instate,
NULL,
1,
NULL
};
static volatile int configured_cnt = 0;
/*
* Handles the USB driver global events.
*/
static void usb_event(USBDriver *usbp, usbevent_t event) {
switch (event) {
case USB_EVENT_RESET:
return;
case USB_EVENT_ADDRESS:
return;
case USB_EVENT_CONFIGURED:
chSysLockFromISR();
/* Enables the endpoints specified into the configuration.
Note, this callback is invoked from an ISR so I-Class functions
must be used.*/
usbInitEndpointI(usbp, USBD2_DATA_REQUEST_EP, &ep1config);
usbInitEndpointI(usbp, USBD2_INTERRUPT_REQUEST_EP, &ep2config);
/* Resetting the state of the CDC subsystem.*/
sduConfigureHookI(&SDU1);
chSysUnlockFromISR();
configured_cnt++;
return;
case USB_EVENT_SUSPEND:
return;
case USB_EVENT_WAKEUP:
return;
case USB_EVENT_STALLED:
return;
}
return;
}
/*
* USB driver configuration.
*/
static const USBConfig usbcfg = {
usb_event,
get_descriptor,
sduRequestsHook,
NULL
};
/*
* Serial over USB driver configuration.
*/
const SerialUSBConfig serusbcfg = {
&USBD1,
USBD2_DATA_REQUEST_EP,
USBD2_DATA_AVAILABLE_EP,
USBD2_INTERRUPT_REQUEST_EP
};
void comm_usb_serial_init(void) {
palSetPadMode(GPIOA, 11,
PAL_MODE_ALTERNATE(GPIO_AF_OTG_FS) |
PAL_STM32_OTYPE_PUSHPULL |
PAL_STM32_OSPEED_MID1);
palSetPadMode(GPIOA, 12,
PAL_MODE_ALTERNATE(GPIO_AF_OTG_FS) |
PAL_STM32_OTYPE_PUSHPULL |
PAL_STM32_OSPEED_MID1);
sduObjectInit(&SDU1);
sduStart(&SDU1, &serusbcfg);
/*
* Activates the USB driver and then the USB bus pull-up on D+.
* Note, a delay is inserted in order to not have to disconnect the cable
* after a reset.
*/
usbDisconnectBus(serusbcfg.usbp);
chThdSleepMilliseconds(1500);
usbStart(serusbcfg.usbp, &usbcfg);
usbConnectBus(serusbcfg.usbp);
}
int comm_usb_serial_is_active(void) {
return SDU1.config->usbp->state == USB_ACTIVE;
}
// Every time the USB cable is plugged in a configuration is done. Unfortunately
// I haven't found a way to detect when the USB cable gets unplugged.
int comm_usb_serial_configured_cnt(void) {
return configured_cnt;
}
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