/****************************************************************************
* DESCRIPTION: Adds an array of elements of data to the FIFO
* RETURN: true on succesful add, false if not added
* ALGORITHM: none
* NOTES: none
*****************************************************************************/
u8 FIFO_PutAr(fifo_buffer * b,u8 * data, u16 len)
{
u8 status = false; /* return value */
u16 cpsr;
u16 delta = 0;
if (b) {
/* limit the ring to prevent overwriting */
if (!FIFO_Full(b))
{
//cpsr = __disable_irq(); //deb
if( len > (b->buffer_len - b->head) )
{
delta = (b->buffer_len - b->head);
memcpy((char *)&(b->buffer[b->head]), (char *)data,delta);
len -= delta;
cpsr = __disable_irq();
b->head = 0;
if(!cpsr)
__enable_irq();
}
memcpy((char *)&(b->buffer[b->head % b->buffer_len]),&data[delta],len);
cpsr = __disable_irq();
b->head += len;
if(b->head == b->buffer_len)
b->head = 0;
if(!cpsr)
__enable_irq();
status = true;
//if(!cpsr) //deb
// __enable_irq();
}
}
return status;
}
//=============================================================================
// UART Transmit Function
//=============================================================================
void UARTA0_Send(char data)
{
// Put straight to UART if not yet transmitting
if (!UARTA0_transmitting)
{
UCA0TXBUF = data;
UARTA0_transmitting = 1;
IE2 |= UCA0TXIE;
// Load data into TX buffer
} else {
// Make sure the buffer isn't full. Loop continuously if it is.
while(FIFO_Full(&UARTA0_tx_buffer));
FIFO_Put(&UARTA0_tx_buffer, data);
}
}
/****************************************************************************
* DESCRIPTION: Adds an element of data to the FIFO
* RETURN: true on succesful add, false if not added
* ALGORITHM: none
* NOTES: none
*****************************************************************************/
u8 FIFO_Put(fifo_buffer * b,u8 data_byte)
{
u8 status = false; /* return value */
u16 cpsr;
if (b) {
/* limit the ring to prevent overwriting */
if (!FIFO_Full(b)) {
b->buffer[b->head % b->buffer_len] = data_byte;
cpsr = __disable_irq();
b->head++;
if(b->head == b->buffer_len)
b->head = 0;
if(!cpsr)
__enable_irq();
status = true;
}
}
return status;
}
/****************************************************************************
* DESCRIPTION: move head of buffer without copying real info(for DMA)
* RETURN: true on succesful add, false if not added
* ALGORITHM: none
* NOTES: none
*****************************************************************************/
u8 FIFO_MovePtr(fifo_buffer * b, u16 len)
{
u8 status = false; /* return value */
u16 delta = 0;
if (b)
{
/* limit the ring to prevent overwriting */
if (!FIFO_Full(b))
{
if( len > (b->buffer_len - b->head) )
{
delta = (b->buffer_len - b->head);
len -= delta;
b->head = 0;
}
b->head += len;
if(b->head == b->buffer_len)
b->head = 0;
status = true;
}
}
return status;
}
