C++ (Cpp) transfer_next Examples

Example #1

File: SPI.cpp Project: rrobinet/Cosa

void
SPI::read(void* buf, size_t count)
{
  if (UNLIKELY(count == 0)) return;
  uint8_t* dp = (uint8_t*) buf;
  transfer_start(0xff);
  while (--count) *dp++ = transfer_next(0xff);
  *dp = transfer_await();
}

Example #2

File: SPI.cpp Project: rrobinet/Cosa

void
SPI::write_P(const void* buf, size_t count)
{
  if (UNLIKELY(count == 0)) return;
  const uint8_t* sp = (const uint8_t*) buf;
  uint8_t data = pgm_read_byte(sp++);
  transfer_start(data);
  while (--count) {
    data = pgm_read_byte(sp++);
    transfer_next(data);
  }
  transfer_await();
}

Example #3

File: SPI.cpp Project: leventesen/Cosa

void 
SPI::write(const void* buf, size_t count)
{
  if (count == 0) return;
  const uint8_t* sp = (const uint8_t*) buf;
  uint8_t data = *sp++;
  transfer_start(data);
  while (--count) {
    data = *sp++;
    transfer_next(data);
  }
  transfer_await();
}

Example #4

File: SPI.cpp Project: rrobinet/Cosa

void
SPI::transfer(void* buf, size_t count)
{
  if (UNLIKELY(count == 0)) return;
  uint8_t* dp = (uint8_t*) buf;
  uint8_t data = *dp;
  transfer_start(data);
  while (--count) {
    uint8_t* tp = dp + 1;
    data = *tp;
    *dp = transfer_next(data);
    dp = tp;
  }
  *dp = transfer_await();
}

Example #5

File: SPI.cpp Project: rrobinet/Cosa

void
SPI::transfer(void* dst, const void* src, size_t count)
{
  if (UNLIKELY(count == 0)) return;
  uint8_t* dp = (uint8_t*) dst;
  const uint8_t* sp = (const uint8_t*) src;
  uint8_t data = *sp++;
  transfer_start(data);
  while (--count) {
    uint8_t* tp = dp + 1;
    data = *sp++;
    *dp = transfer_next(data);
    dp = tp;
  }
  *dp = transfer_await();
}