73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
#include <string.h>
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#include "usb_core.h"
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#include "usbd_core.h"
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#include "usbd_cdc_core.h"
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#include "usbd_pyb_core.h"
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#include "usbd_usr.h"
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#include "usbd_desc.h"
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#include "misc.h"
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#include "usb.h"
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extern CDC_IF_Prop_TypeDef VCP_fops;
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int is_enabled = 0;
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USB_OTG_CORE_HANDLE USB_OTG_dev;
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char rx_buf[64];
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int rx_buf_in;
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int rx_buf_out;
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void usb_init() {
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USBD_Init(&USB_OTG_dev, USB_OTG_FS_CORE_ID, &USR_desc, &USBD_PYB_cb, &USR_cb);
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rx_buf_in = 0;
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rx_buf_out = 0;
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is_enabled = 1;
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}
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void usb_vcp_receive(const char *buf, uint32_t len) {
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if (is_enabled) {
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for (int i = 0; i < len; i++) {
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rx_buf[rx_buf_in++] = buf[i];
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if (rx_buf_in >= sizeof(rx_buf)) {
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rx_buf_in = 0;
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}
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if (rx_buf_in == rx_buf_out) {
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rx_buf_out = rx_buf_in + 1;
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if (rx_buf_out >= sizeof(rx_buf)) {
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rx_buf_out = 0;
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}
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}
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}
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}
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}
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int usb_vcp_rx_any() {
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if (rx_buf_in >= rx_buf_out) {
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return rx_buf_in - rx_buf_out;
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} else {
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return rx_buf_in + sizeof(rx_buf) - rx_buf_out;
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}
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}
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char usb_vcp_rx_get() {
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while (rx_buf_out == rx_buf_in) {
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}
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char c = rx_buf[rx_buf_out];
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rx_buf_out += 1;
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if (rx_buf_out >= sizeof(rx_buf)) {
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rx_buf_out = 0;
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}
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return c;
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}
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void usb_vcp_send_str(const char *str) {
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usb_vcp_send_strn(str, strlen(str));
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}
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void usb_vcp_send_strn(const char *str, int len) {
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if (is_enabled) {
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VCP_fops.pIf_DataTx((const uint8_t*)str, len);
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}
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}
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