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zr-v4/libraries/AP_HAL_F4Light/hardware/hal/usb.c

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/*
(c) 2017 night_ghost@ykoctpa.ru
*/
#include <usb.h>
#include <hal.h>
#include <systick.h>
#include <exti.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <boards.h>
// bugfixes to ST USB stack - https://github.com/olegv142/stm32tivc_usb_cdc
// register description - http://mcu.goodboard.ru/viewtopic.php?id=40
/*
на поржать - https://kincajou.livejournal.com/4206484.html
товарисч копает USB :)
*/
//#define USB_DEBUG
typedef uint8_t U8;
typedef uint32_t U32;
typedef uint16_t U16;
extern USB_OTG_CORE_HANDLE USB_OTG_dev;
extern uint32_t USBD_OTG_ISR_Handler (const USB_OTG_CORE_HANDLE *pdev);
__ALIGN_BEGIN USB_OTG_CORE_HANDLE USB_OTG_dev __ALIGN_END;
static usb_attr_t *usb_attr;
static volatile U8 VCP_DTRHIGH = 0;
static volatile U8 VCP_RTSHIGH = 0;
enum reset_state_t {
DTR_UNSET,
DTR_HIGH,
DTR_NEGEDGE,
DTR_LOW
};
static enum reset_state_t reset_state = DTR_UNSET;
static const U16 rxfifo_size = USB_RXFIFO_SIZE;
//static const U16 txfifo_size = USB_TXFIFO_SIZE;
static ring_buffer _rxfifo IN_CCM;
//static ring_buffer _txfifo;
static ring_buffer *rxfifo = &_rxfifo; /* Rx FIFO */
//static ring_buffer *txfifo = &_txfifo; /* Rx FIFO */
static uint8_t rx_buf[USB_RXFIFO_SIZE]; // USB can work via DMA so no CCM!
//static uint8_t tx_buf[USB_TXFIFO_SIZE];
static U8 preempt_prio, sub_prio;
static U8 usb_ready;
static U8 UsbTXBlock = 1;
LINE_CODING linecoding = // not const!
{
115200, /* baud rate*/
0x00, /* stop bits-1*/
0x00, /* parity - none*/
0x08 /* nb. of bits 8*/
};
/* These are external variables imported from CDC core to be used for IN
transfer management. */
extern U8 APP_Rx_Buffer []; /* Write CDC received data in this buffer.
These data will be sent over USB IN endpoint
in the CDC core functions. */
extern U32 APP_Rx_ptr_in; /* Increment this pointer or roll it back to
start address when writing received data
in the buffer APP_Rx_Buffer. */
/* Private function prototypes -----------------------------------------------*/
static U16 VCP_Init (void);
static U16 VCP_DeInit (void);
static U16 VCP_Ctrl (uint32_t Cmd, uint8_t* Buf, uint32_t Len);
static U16 VCP_DataTx (const uint8_t* Buf, uint32_t Len);
static U16 VCP_DataRx (uint8_t* Buf, uint32_t Len);
// direct usage from usbd_cdc_core.c
const CDC_IF_Prop_TypeDef VCP_fops =
{
VCP_Init,
VCP_DeInit,
VCP_Ctrl,
VCP_DataTx,
VCP_DataRx
};
const USBD_Usr_cb_TypeDef USR_cb =
{
USBD_USR_Init,
USBD_USR_DeviceReset,
USBD_USR_DeviceConfigured,
USBD_USR_DeviceSuspended,
USBD_USR_DeviceResumed,
USBD_USR_DeviceConnected,
USBD_USR_DeviceDisconnected,
};
static const USBD_DEVICE USR_CDC_desc =
{
USBD_USR_DeviceDescriptor,
USBD_USR_LangIDStrDescriptor,
USBD_USR_ManufacturerStrDescriptor,
USBD_USR_ProductStrDescriptor,
USBD_USR_SerialStrDescriptor,
USBD_USR_ConfigStrDescriptor,
USBD_USR_InterfaceStrDescriptor,
};
/* USB Standard Device Descriptor */
__ALIGN_BEGIN U8 const USBD_DeviceDesc[USB_SIZ_DEVICE_DESC] __ALIGN_END =
{
0x12, /*bLength */
USB_DEVICE_DESCRIPTOR_TYPE, /*bDescriptorType*/
0x00, /*bcdUSB */
0x02,
0x00, /*bDeviceClass*/
0x00, /*bDeviceSubClass*/
0x00, /*bDeviceProtocol*/
USB_OTG_MAX_EP0_SIZE, /*bMaxPacketSize*/
LOBYTE(USBD_VID), /*idVendor*/
HIBYTE(USBD_VID), /*idVendor*/
LOBYTE(USBD_PID), /*idVendor*/
HIBYTE(USBD_PID), /*idVendor*/
0x00, /*bcdDevice rel. 2.00*/
0x02,
USBD_IDX_MFC_STR, /*Index of manufacturer string*/
USBD_IDX_PRODUCT_STR, /*Index of product string*/
USBD_IDX_SERIAL_STR, /*Index of serial number string*/
USBD_CFG_MAX_NUM /*bNumConfigurations*/
} ; /* USB_DeviceDescriptor */
/* USB Standard Device Descriptor */
const __ALIGN_BEGIN U8 USBD_DeviceQualifierDesc[USB_LEN_DEV_QUALIFIER_DESC] __ALIGN_END =
{
USB_LEN_DEV_QUALIFIER_DESC,
USB_DESC_TYPE_DEVICE_QUALIFIER,
0x00,
0x02,
0x00,
0x00,
0x00,
0x40,
0x01,
0x00,
};
// handler for hardware ISR
void OTG_FS_IRQHandler(void)
{
USBD_OTG_ISR_Handler(&USB_OTG_dev);
}
/* USB Standard Device Descriptor */
const __ALIGN_BEGIN U8 USBD_LangIDDesc[USB_SIZ_STRING_LANGID] __ALIGN_END =
{
USB_SIZ_STRING_LANGID,
USB_DESC_TYPE_STRING,
LOBYTE(USBD_LANGID_STRING),
HIBYTE(USBD_LANGID_STRING),
};
static U8 usb_connected =0;
static U8 usb_opened =0;
/* Return the device descriptor */
U8 * USBD_USR_DeviceDescriptor(U8 speed, U16 *length)
{
*length = sizeof(USBD_DeviceDesc);
return (U8 *)USBD_DeviceDesc;
}
/* return the LangID string descriptor */
U8 * USBD_USR_LangIDStrDescriptor(U8 speed, U16 *length)
{
*length = sizeof(USBD_LangIDDesc);
return (U8 *)USBD_LangIDDesc;
}
/* return the product string descriptor */
U8 * USBD_USR_ProductStrDescriptor(U8 speed, U16 *length)
{
USBD_GetString ((U8 *)USBD_PRODUCT_FS_STRING, USBD_StrDesc, length);
return USBD_StrDesc;
}
/* return the manufacturer string descriptor */
U8 * USBD_USR_ManufacturerStrDescriptor(U8 speed, U16 *length)
{
USBD_GetString ((U8 *)USBD_MANUFACTURER_STRING, USBD_StrDesc, length);
return USBD_StrDesc;
}
/* return the serial number string descriptor */
U8 * USBD_USR_SerialStrDescriptor(U8 speed, U16 *length)
{
USBD_GetString ((U8 *)USBD_SERIALNUMBER_FS_STRING, USBD_StrDesc, length);
return USBD_StrDesc;
}
/* return the configuration string descriptor */
U8 * USBD_USR_ConfigStrDescriptor(U8 speed , U16 *length)
{
USBD_GetString ((U8 *)USBD_CONFIGURATION_FS_STRING, USBD_StrDesc, length);
return USBD_StrDesc;
}
/* return the interface string descriptor */
U8 * USBD_USR_InterfaceStrDescriptor( U8 speed , U16 *length)
{
USBD_GetString ((U8 *)USBD_INTERFACE_FS_STRING, USBD_StrDesc, length);
return USBD_StrDesc;
}
void USBD_USR_Init(void)
{
usb_connected = 0;
usb_opened = 0;
}
void USBD_USR_DeviceReset(uint8_t speed )
{
switch (speed) {
case USB_OTG_SPEED_HIGH:
break;
case USB_OTG_SPEED_FULL:
break;
default:
break;
}
}
void USBD_USR_DeviceConfigured (void)
{
usb_connected = 1;
usb_opened = 1; // just for case
}
void USBD_USR_DeviceSuspended(void)
{
usb_connected = 0;
usb_opened = 0;
}
void USBD_USR_DeviceResumed(void)
{
usb_connected = 1;
usb_opened = 1; // just for case
}
void USBD_USR_DeviceConnected (void)
{
usb_connected = 1;
usb_opened = 1; // just for case
}
void USBD_USR_DeviceDisconnected (void)
{
usb_connected = 0;
usb_opened = 0;
extern void usb_mass_mal_USBdisconnect();
usb_mass_mal_USBdisconnect(); //reset connection state for mass-storage
}
/*------------------------- usb_default_attr -------------------------------*/
void usb_default_attr(usb_attr_t *attr)
{
attr->preempt_prio = 0;
attr->sub_prio = 0;
attr->use_present_pin = 0;
// attr->description = NULL;
// attr->manufacturer = NULL;
// attr->serial_number = NULL;
// attr->configuration = NULL;
// attr->interface = NULL;
}
/*--------------------------- usb_periphcfg -------------------------------*/
void USB_OTG_BSP_Init(USB_OTG_CORE_HANDLE *pdev){ // callback for hardware init
return;
}
int usb_periphcfg(FunctionalState state)
{
USB_OTG_BSP_DisableInterrupt(); // disable IRQ
if (state == ENABLE) {
RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOA , ENABLE); // USB on GPIO_A
/* Configure USB D-/D+ (DM/DP) pins */
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12; // sometimes touching of GPIO_Pin_12 causes interrupt which will not be served
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
gpio_set_af_mode(_GPIOA, GPIO_PinSource11, GPIO_AF_OTG1_FS);
gpio_set_af_mode(_GPIOA, GPIO_PinSource12, GPIO_AF_OTG1_FS);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_OTG_FS, ENABLE) ;
} else {
gpio_set_mode(DM_PIN_PORT, DM_PIN_PIN, GPIO_INPUT_FLOATING);
gpio_set_mode(DP_PIN_PORT, DP_PIN_PIN, GPIO_INPUT_FLOATING);
// we should not disable sysfg clock..
}
RCC_AHB2PeriphClockCmd(USB_CLOCK, state);
return 1;
}
/*--------------------------- usb_configure -------------------------------*/
int usb_configure(usb_attr_t * attr)
{
if (attr == NULL)
return 0;
usb_setParams(attr);
// USB Device Initialize
USBD_Init(&USB_OTG_dev, USB_OTG_FS_CORE_ID, &USR_CDC_desc, &USBD_CDC_cb, &USR_cb);
usb_ready = 1;
return 1;
}
void usb_setParams(usb_attr_t * attr)
{
if (attr == NULL)
return;
if (attr->use_present_pin) {
if (!IS_GPIO_ALL_PERIPH(attr->present_port->GPIOx) || !IS_GPIO_PIN_SOURCE(attr->present_pin))
return;
gpio_set_mode(attr->present_port, attr->present_pin, GPIO_INPUT_FLOATING);
}
preempt_prio = attr->preempt_prio;
sub_prio = attr->sub_prio;
}
void USB_OTG_BSP_EnableInterrupt(USB_OTG_CORE_HANDLE *pdev)
{
enable_nvic_irq(OTG_FS_IRQn, preempt_prio);
}
void USB_OTG_BSP_DisableInterrupt()
{
NVIC_DisableIRQ(OTG_FS_IRQn);
}
void USB_OTG_BSP_mDelay (const uint32_t msec)
{
uint32_t start = hal_micros(), ms = msec;
while (ms > 0) {
while ((hal_micros() - start) >= 1000) {
ms--;
if (ms == 0) break;
start += 1000;
}
}
}
/* VCP_Init
* Initializes the Media on the STM32
* @param None
* @retval Result of the opeartion (USBD_OK in all cases)
*/
static U16 VCP_Init(void)
{
rb_init(rxfifo, rxfifo_size, rx_buf);
// rb_init(txfifo, txfifo_size, tx_buf);
return USBD_OK;
}
/* VCP_DeInit
* DeInitializes the Media on the STM32
* @param None
* @retval Result of the opeartion (USBD_OK in all cases)
*/
static U16 VCP_DeInit(void)
{
return USBD_OK;
}
/* VCP_Ctrl
* Manage the CDC class requests
* @param Cmd: Command code
* @param Buf: Buffer containing command data (request parameters)
* @param Len: Number of data to be sent (in bytes)
* @retval Result of the opeartion (USBD_OK in all cases)
*/
static U16 VCP_Ctrl (U32 Cmd, U8 *Buf, U32 Len)
{
switch (Cmd) {
case SEND_ENCAPSULATED_COMMAND:
/* Not needed for this driver */
break;
case GET_ENCAPSULATED_RESPONSE:
/* Not needed for this driver */
break;
case SET_COMM_FEATURE:
/* Not needed for this driver */
break;
case GET_COMM_FEATURE:
/* Not needed for this driver */
break;
case CLEAR_COMM_FEATURE:
/* Not needed for this driver */
break;
case SET_LINE_CODING:
linecoding.bitrate = (uint32_t)(Buf[0] | (Buf[1] << 8) | (Buf[2] << 16) | (Buf[3] << 24));
linecoding.format = Buf[4];
linecoding.paritytype = Buf[5];
linecoding.datatype = Buf[6];
/* Set the new configuration */
break;
case GET_LINE_CODING:
Buf[0] = (uint8_t)(linecoding.bitrate);
Buf[1] = (uint8_t)(linecoding.bitrate >> 8);
Buf[2] = (uint8_t)(linecoding.bitrate >> 16);
Buf[3] = (uint8_t)(linecoding.bitrate >> 24);
Buf[4] = linecoding.format;
Buf[5] = linecoding.paritytype;
Buf[6] = linecoding.datatype;
break;
#define USB_CDCACM_CONTROL_LINE_DTR (0x01)
#define USB_CDCACM_CONTROL_LINE_RTS (0x02)
case SET_CONTROL_LINE_STATE:
linecoding.bitrate = (uint32_t)(Buf[0] | (Buf[1] << 8));
VCP_DTRHIGH = (Buf[0] & USB_CDCACM_CONTROL_LINE_DTR);
VCP_RTSHIGH = (Buf[0] & USB_CDCACM_CONTROL_LINE_RTS);
#ifdef DEBUG_BUILD
// { from Arduino32
// We need to see a negative edge on DTR before we start looking
// for the in-band magic reset byte sequence.
uint8_t dtr = VCP_DTRHIGH;
switch (reset_state) {
case DTR_UNSET:
reset_state = dtr ? DTR_HIGH : DTR_LOW;
break;
case DTR_HIGH:
reset_state = dtr ? DTR_HIGH : DTR_NEGEDGE;
break;
case DTR_NEGEDGE:
reset_state = dtr ? DTR_HIGH : DTR_LOW;
break;
case DTR_LOW:
reset_state = dtr ? DTR_HIGH : DTR_LOW;
break;
}
// as Arduino - reset on DTR negative edge
if ((linecoding.bitrate == 1200) && (reset_state == DTR_NEGEDGE)) {
// iwdg_init(IWDG_PRE_4, 10);
NVIC_SystemReset();
while (1);
}
//}
#endif
break;
case SEND_BREAK:
/* Not needed for this driver */
break;
default:
break;
}
usb_opened = 1; // set active state only on VCP opening
usb_connected = 1; // just for case
return USBD_OK;
}
/* VCP_DataTx
* CDC received data to be send over USB IN endpoint are managed in
* this function.
* @param Buf: Buffer of data to be sent
* @param Len: Number of data to be sent (in bytes)
* @retval Result of the opeartion: USBD_OK if all operations are OK else VCP_FAIL
*/
void VCP_MarkWritten(unsigned sz)
{
noInterrupts();
USB_Tx_buff_head = ring_wrap(USB_TX_BUFF_SIZE, USB_Tx_buff_head + sz);
interrupts();
}
unsigned VCP_SpaceAvailContig(void)
{
noInterrupts();
unsigned sz = ring_space_contig(USB_TX_BUFF_SIZE, USB_Tx_buff_head, USB_Tx_buff_tail);
interrupts();
return sz;
}
unsigned VCP_PutContig(void const* buff, unsigned len)
{
unsigned avail = VCP_SpaceAvailContig();
unsigned sz = MIN_(avail, len);
if (sz) {
memcpy(VCP_SpacePtr(), buff, sz);
VCP_MarkWritten(sz);
}
return sz;
}
unsigned VCP_SpaceAvail(void)
{
noInterrupts();
unsigned sz = ring_space_avail(USB_TX_BUFF_SIZE, USB_Tx_buff_head, USB_Tx_buff_tail);
interrupts();
return sz;
}
U16 VCP_DataTx(const U8 *buffer, U32 nbytes)
{
unsigned sz = VCP_PutContig(buffer, nbytes);
if (sz && (nbytes -= sz))
sz += VCP_PutContig((uint8_t*)buffer + sz, nbytes);
return sz;
}
/* VCP_DataRx
* Data received over USB OUT endpoint are sent over CDC interface
* through this function.
*
* Note
* This function will block any OUT packet reception on USB endpoint
* untill exiting this function. If you exit this function before transfer
* is complete on CDC interface (ie. using DMA controller) it will result
* in receiving more data while previous ones are still not sent.
*
* @param Buf: Buffer of data to be received
* @param Len: Number of data received (in bytes)
* @retval Result of the opeartion: USBD_OK if all operations are OK else VCP_FAIL
*/
unsigned VCP_DataAvail(void)
{
noInterrupts();
unsigned sz = ring_data_avail(USB_Rx_buff_size, USB_Rx_buff_head, USB_Rx_buff_tail);
interrupts();
return sz;
}
void VCP_MarkRead(unsigned sz)
{
noInterrupts();
USB_Rx_buff_tail = ring_wrap(USB_Rx_buff_size, USB_Rx_buff_tail + sz);
interrupts();
}
unsigned VCP_GetContig(void* buff, unsigned max_len)
{
unsigned avail = VCP_DataAvailContig();
unsigned sz = MIN_(avail, max_len);
if (sz) {
memcpy(buff, VCP_DataPtr(), sz);
VCP_MarkRead(sz);
}
return sz;
}
unsigned VCP_DataAvailContig(void)
{
noInterrupts();
unsigned sz = ring_data_contig(USB_Rx_buff_size, USB_Rx_buff_head, USB_Rx_buff_tail);
interrupts();
return sz;
}
static U16 VCP_DataRx(U8 *buffer, U32 nbytes)
{
usb_opened = 1; // data from other side
#ifdef DEBUG_BUILD
if(VCP_DTRHIGH) {
if(nbytes >= 4) {
if(buffer[0] == '1' && buffer[1] == 'E' && buffer[2] == 'A' && buffer[3] == 'F') {
nbytes = 0;
if(is_bare_metal()) // bare metal build without bootloader should reboot to DFU on this reset
board_set_rtc_register(DFU_RTC_SIGNATURE, RTC_SIGNATURE_REG);
NVIC_SystemReset();
}
}
}
VCP_DTRHIGH =0;
#endif
unsigned sz = VCP_GetContig(buffer, nbytes);
if (sz && (nbytes -= sz))
sz += VCP_GetContig((uint8_t*)buffer + sz, nbytes);
return sz;
}
/*---------------------------- usb_open ---------------------------------*/
int usb_open(void)
{
usb_periphcfg(ENABLE);
usb_connected = 0;
preempt_prio = 0;
sub_prio = 0;
usb_ready = 0;
return 1;
}
/*---------------------------- usb_close --------------------------------*/
int usb_close(void)
{
usb_periphcfg(DISABLE);
if (usb_ready == 1) {
DCD_DevDisconnect(&USB_OTG_dev);
USBD_DeInit(&USB_OTG_dev);
USB_OTG_StopDevice(&USB_OTG_dev);
usb_ready = 0;
}
if (usb_attr->use_present_pin){
gpio_set_mode(usb_attr->present_port, usb_attr->present_pin, GPIO_INPUT_FLOATING);
}
return 1;
}
uint8_t is_usb_connected(usb_attr_t *attr)
{
if (usb_attr == NULL || (usb_attr && usb_attr->use_present_pin == 0))
return usb_connected;
else
return gpio_read_bit(usb_attr->present_port, usb_attr->present_pin);
}
/*---------------------------- usb_ioctl --------------------------------*/
int usb_ioctl(int request, void *ctl)
{
switch(request) {
case I_USB_CLEAR:
if (!rxfifo) {
return 0;
}
rb_reset(rxfifo);
return 1;
case I_USB_CONNECTED:
*((U8 *)ctl) = is_usb_connected(usb_attr);
break;
case I_USB_GETATTR:
if (usb_attr) {
*((usb_attr_t **)ctl) = usb_attr;
} else {
return 0;
}
break;
case I_USB_SETATTR:
if (ctl == NULL) {
return 0;
}
usb_attr = (usb_attr_t *)ctl;
return usb_configure(usb_attr);
default:
return 0;
}
return 1;
}
// following functions can't be inline!
void USB_OTG_BSP_uDelay (const uint32_t usec) {
//stopwatch_delay_us(usec);
hal_delay_microseconds(usec);
}
int usb_write(const uint8_t *buf, unsigned int nbytes) {
return VCP_DataTx(buf, nbytes);
}
int usb_read(void * buf, unsigned int nbytes){
return VCP_DataRx(buf, nbytes);
}
uint32_t usb_data_available(void){
return VCP_DataAvail();
}
bool usb_get_dtr(){
return VCP_DTRHIGH;
}
void usb_reset_rx(){
rb_reset(rxfifo);
}
void usb_reset_tx(){
APP_Rx_ptr_in = 0;
}
uint16_t usb_tx_pending(void){
return USB_TX_BUFF_SIZE-VCP_SpaceAvail();
}
uint16_t usb_tx_space(void){
return VCP_SpaceAvail();
}
void VCP_SetUSBTxBlocking(uint8_t Mode) {
UsbTXBlock = Mode;
}
//----------------------------------------------------------------------------
uint8_t is_usb_opened() { return usb_opened; }
void reset_usb_opened() { usb_opened=0; }