You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
73 lines
2.4 KiB
73 lines
2.4 KiB
//
|
|
// Created by MightyPork on 2018/04/06.
|
|
//
|
|
|
|
#include "iface_usb.h"
|
|
#include "TinyFrame.h"
|
|
#include "system_settings.h"
|
|
#include "USB/usb_device.h"
|
|
|
|
extern osSemaphoreId semVcomTxReadyHandle;
|
|
extern osMutexId mutTinyFrameTxHandle;
|
|
|
|
bool iface_usb_ready(void)
|
|
{
|
|
return 0 != (USB->DADDR & USB_DADDR_ADD);
|
|
}
|
|
|
|
/**
|
|
* USB transmit implementation
|
|
*
|
|
* @param buff - buffer to send (can be longer than the buffers)
|
|
* @param len - buffer size
|
|
*/
|
|
void iface_usb_transmit(const uint8_t *buff, uint32_t len)
|
|
{
|
|
#if 1
|
|
const uint32_t real_size = len;
|
|
|
|
// Padding to a multiple of 64 bytes - this is supposed to maximize the bulk transfer speed
|
|
if ((len&0x3F) && !SystemSettings.visible_vcom) { // this corrupts VCOM on Linux for some reason
|
|
uint32_t pad = (64 - (len&0x3F));
|
|
memset((void *) (buff + len), 0, pad);
|
|
len += pad; // padding to a multiple of 64 (size of the endpoint)
|
|
}
|
|
|
|
// We bypass the USBD driver library's overhead by using the HAL function directly
|
|
assert_param(HAL_OK == HAL_PCD_EP_Transmit(hUsbDeviceFS.pData, CDC_IN_EP, (uint8_t *) buff, len));
|
|
|
|
// The buffer is the TF transmit buffer, we can't leave it to work asynchronously because
|
|
// the next call could modify it before it's been transmitted (in the case of a chunked / multi-part frame)
|
|
|
|
// If this is not the last chunk (assuming all but the last use full 512 bytes of the TF buffer), wait now for completion
|
|
if (real_size == TF_SENDBUF_LEN) {
|
|
// TODO this seems wrong - investigate
|
|
if (pdTRUE != xSemaphoreTake(semVcomTxReadyHandle, 100)) {
|
|
TF_Error("Tx stalled in WriteImpl");
|
|
return;
|
|
}
|
|
}
|
|
#else
|
|
(void) tf;
|
|
#define CHUNK 64 // size of the USB packet
|
|
int32_t total = (int32_t) len;
|
|
while (total > 0) {
|
|
const int32_t mxStatus = osSemaphoreWait(semVcomTxReadyHandle, 100);
|
|
if (mxStatus != osOK) {
|
|
TF_Error("Tx stalled");
|
|
return;
|
|
}
|
|
|
|
const uint16_t chunksize = (uint16_t) MIN(total, CHUNK);
|
|
|
|
// this is an attempt to speed it up a little by removing a couple levels of indirection
|
|
assert_param(HAL_OK == HAL_PCD_EP_Transmit(hUsbDeviceFS.pData, CDC_IN_EP, (uint8_t *) buff, chunksize));
|
|
|
|
// USBD_LL_Transmit(&hUsbDeviceFS, CDC_IN_EP, (uint8_t *) buff, chunksize);
|
|
// assert_param(USBD_OK == CDC_Transmit_FS((uint8_t *) buff, chunksize));
|
|
|
|
buff += chunksize;
|
|
total -= chunksize;
|
|
}
|
|
#endif
|
|
}
|
|
|