28 lines
457 B
C
28 lines
457 B
C
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#include "usbd_cdc_if.h"
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const long USB_SEND_TIMEOUT = 10000L;
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uint8_t buffer[128];
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volatile int bufferindex = 0;
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void __io_flush() {
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long count = 0;
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while(count < USB_SEND_TIMEOUT && CDC_Transmit_FS(buffer, bufferindex) == USBD_BUSY) {
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++count;
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}
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bufferindex = 0;
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}
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int __io_putchar( int ch )
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{
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if (ch == '\n') __io_putchar('\r');
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buffer[bufferindex++] = ch;
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if (ch == '\n' || bufferindex == sizeof(buffer)) __io_flush();
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return 1;
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}
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