int32_t HAL_USB_USART_Available_Data_For_Write(HAL_USB_USART_Serial serial)
{
if (HAL_USB_USART_Is_Connected(serial))
{
int state = HAL_disable_irq();
int32_t available = ring_space_avail(usbUsartMap[serial].data->tx_buffer_size,
usbUsartMap[serial].data->tx_buffer_head,
usbUsartMap[serial].data->tx_buffer_tail);
HAL_enable_irq(state);
return available;
}
return -1;
}
void consume(Stream& serial)
{
while (serial.available() > 0) {
(void)serial.read();
}
}
test(0_USBSERIAL_RingBufferHelperIsSane) {
uint32_t size = 129;
uint32_t head = 0;
uint32_t tail = 0;
head = 0;
tail = 0;
assertEqual(0, ring_data_avail(size, head, tail));
assertEqual(128, ring_space_avail(size, head, tail));
assertEqual(0, ring_data_contig(size, head, tail));
assertEqual(128, ring_space_contig(size, head, tail));
assertEqual(0, ring_space_wrapped(size, head, tail));
head = 63;
tail = 0;
assertEqual(63, ring_data_avail(size, head, tail));
assertEqual(65, ring_space_avail(size, head, tail));
assertEqual(63, ring_data_contig(size, head, tail));
assertEqual(65, ring_space_contig(size, head, tail));
assertEqual(0, ring_space_wrapped(size, head, tail));
head = 63;
tail = 32;
assertEqual(31, ring_data_avail(size, head, tail));
