103 lines
2.7 KiB
C
103 lines
2.7 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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USB_OTG_CORE_HANDLE USB_OTG_dev;
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static int is_enabled = 0;
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static char rx_buf[64];
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static int rx_buf_in;
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static int rx_buf_out;
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void usb_init() {
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if (!is_enabled) {
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// only init USB once in the device's power-lifetime
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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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}
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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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bool usb_vcp_is_enabled() {
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return is_enabled;
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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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#include "lib/usbd_conf.h"
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/* These are external variables imported from CDC core to be used for IN
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transfer management. */
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extern uint8_t APP_Rx_Buffer []; /* Write CDC received data in this buffer.
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These data will be sent over USB IN endpoint
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in the CDC core functions. */
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extern uint32_t APP_Rx_ptr_in; /* Increment this pointer or roll it back to
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start address when writing received data
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in the buffer APP_Rx_Buffer. */
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void usb_vcp_send_strn_cooked(const char *str, int len) {
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for (const char *top = str + len; str < top; str++) {
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if (*str == '\n') {
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APP_Rx_Buffer[APP_Rx_ptr_in] = '\r';
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APP_Rx_ptr_in = (APP_Rx_ptr_in + 1) & (APP_RX_DATA_SIZE - 1);
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}
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APP_Rx_Buffer[APP_Rx_ptr_in] = *str;
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APP_Rx_ptr_in = (APP_Rx_ptr_in + 1) & (APP_RX_DATA_SIZE - 1);
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}
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}
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