C++ (Cpp) cdc_acm_fifo_read示例

示例#1

文件： main.c 项目： jeez/qmsi

static void read_and_echo_data(int *bytes_read)
{
	while (data_received == false)
		;

	data_received = false;

	/* Read all data and echo it back. */
	while ((*bytes_read =
		    cdc_acm_fifo_read((uint8_t *)data_buf, sizeof(data_buf)))) {
		write_data(data_buf, *bytes_read);
	}
}

示例#2

文件： main.c 项目： quark-mcu/qmsi

static int read_data(uint8_t *buf, size_t *len, size_t max_len)
{
	size_t part = 0;
	size_t total = 0;
	do {
		part = cdc_acm_fifo_read(buf + total, max_len - total);
		total += part;
	} while (part && (total < max_len));
	*len = total;
	if (part) {
		return -EIO;
	}
	return 0;
}