/** Reconfigures the USART to match the current serial port settings issued by the host as closely as possible. */
void ReconfigureUSART(void)
{
uint8_t ConfigMask = 0;
/* Determine parity - non odd/even parity mode defaults to no parity */
if (LineCoding.ParityType == Parity_Odd)
ConfigMask = ((1 << UPM11) | (1 << UPM10));
else if (LineCoding.ParityType == Parity_Even)
ConfigMask = (1 << UPM11);
/* Determine stop bits - 1.5 stop bits is set as 1 stop bit due to hardware limitations */
if (LineCoding.CharFormat == TwoStopBits)
ConfigMask |= (1 << USBS1);
/* Determine data size - 5, 6, 7, or 8 bits are supported */
if (LineCoding.DataBits == 6)
ConfigMask |= (1 << UCSZ10);
else if (LineCoding.DataBits == 7)
ConfigMask |= (1 << UCSZ11);
else if (LineCoding.DataBits == 8)
ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10));
/* Enable double speed, gives better error percentages at 8MHz */
UCSR1A = (1 << U2X1);
/* Enable transmit and receive modules and interrupts */
UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));
/* Set the USART mode to the mask generated by the Line Coding options */
UCSR1C = ConfigMask;
/* Set the USART baud rate register to the desired baud rate value */
UBRR1 = SERIAL_2X_UBBRVAL((uint16_t)LineCoding.BaudRateBPS);
}
/** Configures the board hardware and chip peripherals for the demo's functionality. */
void SetupHardware(void)
{
/* Disable watchdog if enabled by bootloader/fuses */
MCUSR &= ~(1 << WDRF);
wdt_disable();
/* Hardware Initialization */
Serial_Init(115200, false);
LEDs_Init();
USB_Init();
/* Start the flush timer so that overflows occur rapidly to push received bytes to the USB interface */
TCCR0B = (1 << CS02);
/* Must turn off USART before reconfiguring it, otherwise incorrect operation may occur */
UCSR1B = 0;
UCSR1A = 0;
UCSR1C = 0;
UBRR1 = SERIAL_2X_UBBRVAL(115200);
UCSR1C = ((1 << UCSZ11) | (1 << UCSZ10));
UCSR1A = (1 << U2X1);
UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));
}
void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
{
uint8_t ConfigMask = 0;
switch (CDCInterfaceInfo->State.LineEncoding.ParityType)
{
case CDC_PARITY_Odd:
{
ConfigMask = ((1 << UPM11) | (1 << UPM10));
break;
}
case CDC_PARITY_Even:
{
ConfigMask = (1 << UPM11);
break;
}
}
if (CDCInterfaceInfo->State.LineEncoding.CharFormat == CDC_LINEENCODING_TwoStopBits)
{
ConfigMask |= (1 << USBS1);
}
switch (CDCInterfaceInfo->State.LineEncoding.DataBits)
{
case 6:
{
ConfigMask |= (1 << UCSZ10);
break;
}
case 7:
{
ConfigMask |= (1 << UCSZ11);
break;
}
case 8:
{
ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10));
break;
}
}
PORTD |= (1 << 3); /* Keep the TX line held high (idle) while the USART is reconfigured */
/* Must turn off USART before reconfiguring it, otherwise incorrect operation may occur */
UCSR1B = 0;
UCSR1A = 0;
UCSR1C = 0;
UBRR1 = SERIAL_2X_UBBRVAL(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS); /* Set the new baud rate before configuring the USART */
/* Reconfigure the USART in double speed mode for a wider baud rate range at the expense of accuracy */
UCSR1C = ConfigMask;
UCSR1A = (1 << U2X1);
UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));
PORTD &= ~(1 << 3); /* Release the TX line after the USART has been reconfigured */
}
/** Event handler for the CDC Class driver Line Encoding Changed event.
*
* \param[in] CDCInterfaceInfo Pointer to the CDC class interface configuration structure being referenced
*/
void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
{
uint8_t ConfigMask = 0;
switch (CDCInterfaceInfo->State.LineEncoding.ParityType)
{
case CDC_PARITY_Odd:
ConfigMask = ((1 << UPM11) | (1 << UPM10));
break;
case CDC_PARITY_Even:
ConfigMask = (1 << UPM11);
break;
}
if (CDCInterfaceInfo->State.LineEncoding.CharFormat == CDC_LINEENCODING_TwoStopBits)
ConfigMask |= (1 << USBS1);
switch (CDCInterfaceInfo->State.LineEncoding.DataBits)
{
case 6:
ConfigMask |= (1 << UCSZ10);
break;
case 7:
ConfigMask |= (1 << UCSZ11);
break;
case 8:
ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10));
break;
}
/* Must turn off USART before reconfiguring it, otherwise incorrect operation may occur */
UCSR1B = 0;
UCSR1A = 0;
UCSR1C = 0;
/* Set the new baud rate before configuring the USART */
UBRR1 = SERIAL_2X_UBBRVAL(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS);
/* Reconfigure the USART in double speed mode for a wider baud rate range at the expense of accuracy */
UCSR1C = ConfigMask;
UCSR1A = (1 << U2X1);
UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));
// If the baudrate is at this special (and unlikely) value, it means that we want to trigger the bootloader
if (CDCInterfaceInfo->State.LineEncoding.BaudRateBPS == 1200){
needs_bootload = true;
}
}
/*************************************************************************
Function: uart_init()
Purpose: initialize UART and set baudrate
Input: baudrate using macro UART_BAUD_SELECT()
Returns: none
**************************************************************************/
void uart_init(uint32_t baudrate, bool doublespeed)
{
UART_TxHead = 0;
UART_TxTail = 0;
UART_RxHead = 0;
UART_RxTail = 0;
UBRR1 = (doublespeed ? SERIAL_2X_UBBRVAL(baudrate) : SERIAL_UBBRVAL(baudrate));
UCSR1C = ((1 << UCSZ11) | (1 << UCSZ10));
UCSR1A = (doublespeed ? (1 << U2X1) : 0);
UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));
DDRD |= (1 << 3);
PORTD |= (1 << 2);
}/* uart_init */
/** change serial configuration between atmega and jennic */
void Serial_Config(uint32_t Baudrate, uint8_t DataBits, uint8_t StopBits, uint8_t Parity)
{
uint8_t ConfigMask = 0;
switch (Parity)
{
case CDC_PARITY_Odd:
ConfigMask = ((1 << UPM11) | (1 << UPM10));
break;
case CDC_PARITY_Even:
ConfigMask = (1 << UPM11);
break;
}
if (StopBits == CDC_LINEENCODING_TwoStopBits)
ConfigMask |= (1 << USBS1);
switch (DataBits)
{
case 6:
ConfigMask |= (1 << UCSZ10);
break;
case 7:
ConfigMask |= (1 << UCSZ11);
break;
case 8:
ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10));
break;
}
/* Must turn off USART before reconfiguring it, otherwise incorrect operation may occur */
UCSR1B = 0;
UCSR1A = 0;
UCSR1C = 0;
/* Set the new baud rate before configuring the USART */
UBRR1 = SERIAL_2X_UBBRVAL(Baudrate);
UCSR1A = (1 << U2X1);
UCSR1C = ConfigMask;
UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));
/* enable RTS/CTS flow control XXX: conflict with CC3000 */
//UCSR1D = (1<<RTSEN)|(1<<CTSEN);
}
/** Event handler for the CDC Class driver Line Encoding Changed event.
*
* \param[in] CDCInterfaceInfo Pointer to the CDC class interface configuration structure being referenced
*/
void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
{
uint8_t ConfigMask = 0;
switch (CDCInterfaceInfo->State.LineEncoding.ParityType)
{
case CDC_PARITY_Odd:
ConfigMask = ((1 << UPM11) | (1 << UPM10));
break;
case CDC_PARITY_Even:
ConfigMask = (1 << UPM11);
break;
}
if (CDCInterfaceInfo->State.LineEncoding.CharFormat == CDC_LINEENCODING_TwoStopBits)
ConfigMask |= (1 << USBS1);
switch (CDCInterfaceInfo->State.LineEncoding.DataBits)
{
case 6:
ConfigMask |= (1 << UCSZ10);
break;
case 7:
ConfigMask |= (1 << UCSZ11);
break;
case 8:
ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10));
break;
}
/* Must turn off USART before reconfiguring it, otherwise incorrect operation may occur */
UCSR1B = 0;
UCSR1A = 0;
UCSR1C = 0;
/* Special case 57600 baud for compatibility with the ATmega328 bootloader. */
UBRR1 = (CDCInterfaceInfo->State.LineEncoding.BaudRateBPS == 57600)
? SERIAL_UBBRVAL(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS)
: SERIAL_2X_UBBRVAL(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS);
UCSR1C = ConfigMask;
UCSR1A = (CDCInterfaceInfo->State.LineEncoding.BaudRateBPS == 57600) ? 0 : (1 << U2X1);
UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));
}
/** Event handler for the CDC Class driver Line Encoding Changed event.
*
* \param[in] CDCInterfaceInfo Pointer to the CDC class interface configuration structure being referenced
*/
void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
{
uint8_t ConfigMask = 0;
switch (CDCInterfaceInfo->State.LineEncoding.ParityType)
{
case CDC_PARITY_Odd:
ConfigMask = ((1 << UPM11) | (1 << UPM10));
break;
case CDC_PARITY_Even:
ConfigMask = (1 << UPM11);
break;
}
if (CDCInterfaceInfo->State.LineEncoding.CharFormat == CDC_LINEENCODING_TwoStopBits)
ConfigMask |= (1 << USBS1);
switch (CDCInterfaceInfo->State.LineEncoding.DataBits)
{
case 6:
ConfigMask |= (1 << UCSZ10);
break;
case 7:
ConfigMask |= (1 << UCSZ11);
break;
case 8:
ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10));
break;
}
/* Must turn off USART before reconfiguring it, otherwise incorrect operation may occur */
UCSR1B = 0;
UCSR1A = 0;
UCSR1C = 0;
long bps = CDCInterfaceInfo->State.LineEncoding.BaudRateBPS;
Selected1200BPS = (bps == 1200);
UBRR1 = SERIAL_2X_UBBRVAL(bps);
UCSR1C = ConfigMask;
UCSR1A = (1 << U2X1);
UCSR1B = (1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1);
}
