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trezor-firmware/micropython/extmod/modtrezormsg/modtrezormsg-stm32.h

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/*
* Copyright (c) Pavol Rusnak, SatoshiLabs
*
* Licensed under TREZOR License
* see LICENSE file for details
*/
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#include "usb.h"
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void msg_init(void)
{
}
ssize_t msg_recv(uint8_t *iface, uint8_t *buf, size_t len)
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{
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int i = usb_hid_read_select(1); // 1ms timeout
if (i < 0) {
return 0;
}
*iface = i;
return usb_hid_read(i, buf, len);
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}
ssize_t msg_send(uint8_t iface, const uint8_t *buf, size_t len)
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{
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return usb_hid_write_blocking(iface, buf, len, 1); // 1ms timeout
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}