/**************************************************************************//**
\brief Startup initialization.
******************************************************************************/
void hwInitUsbFifo(void)
{
// init decoder input pins
GPIO_PD6_make_out();
GPIO_PD7_make_out();
// set pins to zero to select usb FIFO
GPIO_PD6_clr();
GPIO_PD7_clr();
// setup default value
GPIO_RD_set();
GPIO_WR_set();
// init R\W pins
GPIO_RD_make_out();
GPIO_WR_make_out();
// init message pins
GPIO_TXE_make_in();
GPIO_RXF_make_in();
USB_DATA_DDR = 0;
//to avoid IAR warnings
(void)GPIO_PD6_set;
(void)GPIO_PD6_read;
(void)GPIO_PD7_set;
(void)GPIO_PD7_read;
(void)GPIO_RD_read;
(void)GPIO_WR_read;
(void)GPIO_TXE_set;
(void)GPIO_TXE_clr;
(void)GPIO_TXE_make_out;
(void)GPIO_RXF_set;
(void)GPIO_RXF_clr;
(void)GPIO_RXF_make_out;
}
/**************************************************************************//**
\brief Receive byte from usb FIFO.
\param[out]
p - pointer to byte memory;
\return
true - there is received byte; \n
false - there is not received byte;
******************************************************************************/
bool getByteUsbFifo(uint8_t *p)
{
if (!GPIO_RXF_read())
{
GPIO_RD_clr();
NOP;
*p = USB_DATA_PIN;
GPIO_RD_set();
return true;
}
return false;
}
/**************************************************************************//**
\brief Puts the byte received to the cyclic buffer.
******************************************************************************/
static void usbfifoRxBufferFiller(void)
{
uint16_t old;
uint16_t poW;
uint16_t poR;
uint8_t *buffer;
HalUsartService_t *control;
if (!usbfifoPointDescrip)
{ // unregistered intrrupt is occurred
HAL_DisableIrq(IRQ_7);
return;
}
control = &usbfifoPointDescrip->service;
poW = control->rxPointOfWrite;
poR = control->rxPointOfRead;
buffer = usbfifoPointDescrip->rxBuffer;
if (!buffer)
{
HAL_DisableIrq(IRQ_7);
return;
}
old = poW;
if (++poW == usbfifoPointDescrip->rxBufferLength)
poW = 0;
if (poW == poR)
{ // Buffer full.
HAL_DisableIrq(IRQ_7);
return;
} // Buffer full.
control->rxPointOfWrite = poW;
GPIO_RD_clr();
NOP;
buffer[old] = USB_DATA_PIN;
GPIO_RD_set();
control->rxBytesInBuffer++;
usbfifoPostTask(USB_FIFO_TASK_RX);
}
/**************************************************************************//**
\brief Startup initialization.
******************************************************************************/
void hwInitUsbFifo(void)
{
// init decoder input pins
GPIO_PD6_make_out();
GPIO_PD7_make_out();
// set pins to zero to select usb FIFO
GPIO_PD6_clr();
GPIO_PD7_clr();
// setup default value
GPIO_RD_set();
GPIO_WR_set();
// init R\W pins
GPIO_RD_make_out();
GPIO_WR_make_out();
// init message pins
GPIO_TXE_make_in();
GPIO_RXF_make_in();
USB_DATA_DDR = 0;
}
/**************************************************************************//**
\brief Startup initialization.
******************************************************************************/
void usbfifoInit(void)
{
// init decoder input pins
GPIO_PC6_make_out();
GPIO_PC7_make_out();
// set pins to zero to select usb FIFO
GPIO_PC6_clr();
GPIO_PC7_clr();
// setup default value
GPIO_RD_set();
GPIO_WR_set();
// init R\W pins
GPIO_RD_make_out();
GPIO_WR_make_out();
// register RXF interrupt
HAL_RegisterIrq(IRQ_7, IRQ_LOW_LEVEL, usbfifoRxBufferFiller);
// register TXE interrupt
HAL_RegisterIrq(IRQ_6, IRQ_LOW_LEVEL, usbfifoTxBufferCleaner);
USB_DATA_DDR = 0;
}
