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#include <string.h>
#include "usb_core.h"
#include "usbd_core.h"
#include "usbd_cdc_core.h"
#include "usbd_pyb_core.h"
#include "usbd_usr.h"
#include "usbd_desc.h"
#include "misc.h"
#include "usb.h"
extern CDC_IF_Prop_TypeDef VCP_fops;
USB_OTG_CORE_HANDLE USB_OTG_dev;
static int is_enabled = 0;
static char rx_buf[64];
static int rx_buf_in;
static int rx_buf_out;
void usb_init(void) {
if (!is_enabled) {
// only init USB once in the device's power-lifetime
USBD_Init(&USB_OTG_dev, USB_OTG_FS_CORE_ID, &USR_desc, &USBD_PYB_cb, &USR_cb);
//USBD_Init(&USB_OTG_dev, USB_OTG_FS_CORE_ID, &USR_desc, &USBD_PYB_HID_cb, &USR_cb);
}
rx_buf_in = 0;
rx_buf_out = 0;
is_enabled = 1;
}
bool usb_vcp_is_enabled(void) {
return is_enabled;
}
void usb_vcp_receive(const char *buf, uint32_t len) {
if (is_enabled) {
for (int i = 0; i < len; i++) {
rx_buf[rx_buf_in++] = buf[i];
if (rx_buf_in >= sizeof(rx_buf)) {
rx_buf_in = 0;
}
if (rx_buf_in == rx_buf_out) {
rx_buf_out = rx_buf_in + 1;
if (rx_buf_out >= sizeof(rx_buf)) {
rx_buf_out = 0;
}
}
}
}
}
int usb_vcp_rx_any(void) {
if (rx_buf_in >= rx_buf_out) {
return rx_buf_in - rx_buf_out;
} else {
return rx_buf_in + sizeof(rx_buf) - rx_buf_out;
}
}
char usb_vcp_rx_get(void) {
while (rx_buf_out == rx_buf_in) {
}
char c = rx_buf[rx_buf_out];
rx_buf_out += 1;
if (rx_buf_out >= sizeof(rx_buf)) {
rx_buf_out = 0;
}
return c;
}
void usb_vcp_send_str(const char *str) {
usb_vcp_send_strn(str, strlen(str));
}
void usb_vcp_send_strn(const char *str, int len) {
if (is_enabled) {
VCP_fops.pIf_DataTx((const uint8_t*)str, len);
}
}
#include "lib/usbd_conf.h"
/* These are external variables imported from CDC core to be used for IN
transfer management. */
extern uint8_t 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 uint32_t APP_Rx_ptr_in; /* Increment this pointer or roll it back to
start address when writing received data
in the buffer APP_Rx_Buffer. */
void usb_vcp_send_strn_cooked(const char *str, int len) {
for (const char *top = str + len; str < top; str++) {
if (*str == '\n') {
APP_Rx_Buffer[APP_Rx_ptr_in] = '\r';
APP_Rx_ptr_in = (APP_Rx_ptr_in + 1) & (APP_RX_DATA_SIZE - 1);
}
APP_Rx_Buffer[APP_Rx_ptr_in] = *str;
APP_Rx_ptr_in = (APP_Rx_ptr_in + 1) & (APP_RX_DATA_SIZE - 1);
}
}
void usb_hid_send_report(uint8_t *buf) {
USBD_HID_SendReport(&USB_OTG_dev, buf, 4);
}
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