void print_digit_hex(uint8_t value)
{
if (value > 9) {
CDC_Device_SendByte(&CDC_interface, value - 10 + 'A');
} else {
CDC_Device_SendByte(&CDC_interface, value + '0');
}
}
void print_hex(uint16_t value)
{
CDC_Device_SendByte(&CDC_interface, '0');
CDC_Device_SendByte(&CDC_interface, 'x');
print_digit_hex((value & 0xF000) >> 12);
print_digit_hex((value & 0x0F00) >> 8);
print_digit_hex((value & 0x00F0) >> 4);
print_digit_hex((value & 0x000F) >> 0);
}
void printPacket(MRF_packet_t *rx_packet)
{
// Print a label for the packet type
switch (rx_packet->type) {
case PACKET_TYPE_SERIAL:
sendStringP(typeSerialString);
break;
case PACKET_TYPE_SERIAL_ECC:
sendStringP(typeSerialECCString);
break;
case PACKET_TYPE_PACKET:
sendStringP(typePacketString);
break;
case PACKET_TYPE_PACKET_ECC:
sendStringP(typePacketECCString);
break;
default:
sendStringP(typeUnknownString);
break;
}
// Print the packet length
sendStringP(packetLengthString);
print_dec(rx_packet->payloadSize);
CDC_Device_SendByte(&CDC_interface, ':');
CDC_Device_SendByte(&CDC_interface, ' ');
// Print the packet contents
for (int i = 0; i < rx_packet->payloadSize; i++) {
if (i % 10 == 0) {
CDC_Device_SendByte(&CDC_interface, '\n');
CDC_Device_SendByte(&CDC_interface, '\r');
}
uint8_t byte = rx_packet->payload[i];
CDC_Device_SendByte(&CDC_interface, byte);
// if (byte & 0xF0 > 0x90) {
// CDC_Device_SendByte(&CDC_interface, ((byte & 0xF0) >> 4) + 'A');
// } else {
// CDC_Device_SendByte(&CDC_interface, ((byte & 0xF0) >> 4) + '0');
// }
//
// if (byte & 0x0F > 0x09) {
// CDC_Device_SendByte(&CDC_interface, (byte & 0x0F) + 'A');
// } else {
// CDC_Device_SendByte(&CDC_interface, (byte & 0x0F) + '0');
// }
}
CDC_Device_Flush(&CDC_interface);
}
/** Main program entry point. This routine contains the overall program flow, including initial
* setup of all components and the main program loop.
*/
int main(void)
{
SetupHardware();
RingBuffer_InitBuffer(&USBtoUSART_Buffer, USBtoUSART_Buffer_Data, sizeof(USBtoUSART_Buffer_Data));
RingBuffer_InitBuffer(&USARTtoUSB_Buffer, USARTtoUSB_Buffer_Data, sizeof(USARTtoUSB_Buffer_Data));
LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
GlobalInterruptEnable();
for (;;)
{
/* Only try to read in bytes from the CDC interface if the transmit buffer is not full */
if (!(RingBuffer_IsFull(&USBtoUSART_Buffer)))
{
int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
/* Read bytes from the USB OUT endpoint into the USART transmit buffer */
if (!(ReceivedByte < 0))
RingBuffer_Insert(&USBtoUSART_Buffer, ReceivedByte);
}
/* Check if the UART receive buffer flush timer has expired or the buffer is nearly full */
uint16_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer);
if (BufferCount)
{
Endpoint_SelectEndpoint(VirtualSerial_CDC_Interface.Config.DataINEndpoint.Address);
/* Check if a packet is already enqueued to the host - if so, we shouldn't try to send more data
* until it completes as there is a chance nothing is listening and a lengthy timeout could occur */
if (Endpoint_IsINReady())
{
/* Never send more than one bank size less one byte to the host at a time, so that we don't block
* while a Zero Length Packet (ZLP) to terminate the transfer is sent if the host isn't listening */
uint8_t BytesToSend = MIN(BufferCount, (CDC_TXRX_EPSIZE - 1));
/* Read bytes from the USART receive buffer into the USB IN endpoint */
while (BytesToSend--)
{
/* Try to send the next byte of data to the host, abort if there is an error without dequeuing */
if (CDC_Device_SendByte(&VirtualSerial_CDC_Interface,
RingBuffer_Peek(&USARTtoUSB_Buffer)) != ENDPOINT_READYWAIT_NoError)
{
break;
}
/* Dequeue the already sent byte from the buffer now we have confirmed that no transmission error occurred */
RingBuffer_Remove(&USARTtoUSB_Buffer);
}
}
}
/* Load the next byte from the USART transmit buffer into the USART */
if (!(RingBuffer_IsEmpty(&USBtoUSART_Buffer)))
Serial_SendByte(RingBuffer_Remove(&USBtoUSART_Buffer));
CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
USB_USBTask();
}
}
int
main(void) {
uint8_t i = 1;
uint8_t count = 3;
setup();
blink(3);
_delay_ms(100);
while (1) {
// Print greeting at most count times.
if (i <= count) {
if (USB_DeviceState == DEVICE_STATE_Configured && ok_to_send) {
blink(i);
CDC_Device_SendString(&VirtualSerial_CDC_Interface, "Hello World! ");
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, '0' + i);
CDC_Device_SendString(&VirtualSerial_CDC_Interface, "\r\n");
CDC_Device_Flush(&VirtualSerial_CDC_Interface);
i++;
}
}
if (USB_DeviceState == DEVICE_STATE_Configured) {
/* Must throw away unused bytes from the host, or it will lock up
while waiting for the device */
CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
}
CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
USB_USBTask();
}
}
void HandleSerial(void)
{
// Only try to read in bytes from the CDC interface if the transmit buffer is not full
if (!(RingBuffer_IsFull(&FromHost_Buffer)))
{
int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
// Read bytes from the USB OUT endpoint into the USART transmit buffer
if (!(ReceivedByte < 0)){
RingBuffer_Insert(&FromHost_Buffer, ReceivedByte);
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, ReceivedByte);
}
}
while (RingBuffer_GetCount(&FromHost_Buffer) > 0)
{
int16_t c = RingBuffer_Remove(&FromHost_Buffer);
if(c == '\n' || c == '\r'){
if(cmd_cnt > 0 && (cmd[cmd_cnt-1] == '\n' || cmd[cmd_cnt-1] == '\r'))
cmd_cnt--;
cmd[cmd_cnt] = 0;
execute_command();
cmd_cnt = 0;
}
else{
cmd[cmd_cnt++] = c;
}
}
}
uint16_t print_digit(uint16_t value, uint16_t place)
{
uint16_t remainder;
uint16_t quotient = stupid_divide(value, place, &remainder);
CDC_Device_SendByte(&CDC_interface, '0' + quotient);
return remainder;
}
void CDC_Send(uint8_t * Buffer){
uint8_t i=0;
while (Buffer[i]!=0){
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, Buffer[i]);
i++;
}
}
/** Main program entry point. This routine contains the overall program flow, including initial
* setup of all components and the main program loop.
*/
int main(void)
{
SetupHardware();
GlobalInterruptEnable();
uint8_t sending = 0;
for (;;) {
while (1) {
int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
if (ReceivedByte < 0)
break;
if (!configured) continue;
if (!sending) {
PORTC.OUTSET = PIN1_bm;
sending = 1;
}
PORTD.OUTTGL = PIN5_bm;
while(!USART_IsTXDataRegisterEmpty(&USART));
USART_PutChar(&USART, ReceivedByte & 0xff);
}
if (sending) {
USART_ClearTXComplete(&USART);
while(!USART_IsTXComplete(&USART));
PORTC.OUTCLR = PIN1_bm;
sending = 0;
}
Endpoint_SelectEndpoint(VirtualSerial_CDC_Interface.Config.DataINEndpoint.Address);
/* Check if a packet is already enqueued to the host - if so, we shouldn't try to send more data
* until it completes as there is a chance nothing is listening and a lengthy timeout could occur */
if (configured && Endpoint_IsINReady()) {
uint8_t maxbytes = CDC_TXRX_EPSIZE;
while (USART_RXBufferData_Available(&USART_data) && maxbytes-->0) {
uint8_t b = USART_RXBuffer_GetByte(&USART_data);
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, b);
PORTD.OUTTGL = PIN5_bm;
}
}
CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
USB_USBTask();
if (loop++) continue;
if (!configured) continue;
PORTD.OUTTGL = PIN5_bm;
}
}
static int CDC_Device_putchar(char c,
FILE* Stream)
{
if(c == 0x0A)
{
CDC_Device_putchar(0x0D, Stream);
}
return CDC_Device_SendByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream), c) ? _FDEV_ERR : 0;
}
/** Main program entry point. This routine contains the overall program flow, including initial
* setup of all components and the main program loop.
*/
int main(void)
{
SetupHardware();
RingBuffer_InitBuffer(&USBtoUSART_Buffer);
RingBuffer_InitBuffer(&USARTtoUSB_Buffer);
sei();
for (;;)
{
/* Only try to read in bytes from the CDC interface if the transmit buffer is not full */
if (!(RingBuffer_IsFull(&USBtoUSART_Buffer)))
{
int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
/* Read bytes from the USB OUT endpoint into the USART transmit buffer */
if (!(ReceivedByte < 0))
RingBuffer_Insert(&USBtoUSART_Buffer, ReceivedByte);
}
/* Check if the UART receive buffer flush timer has expired or the buffer is nearly full */
RingBuff_Count_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer);
if ((TIFR0 & (1 << TOV0)) || (BufferCount > BUFFER_NEARLY_FULL))
{
TIFR0 |= (1 << TOV0);
if (USARTtoUSB_Buffer.Count) {
LEDs_TurnOnLEDs(LEDMASK_TX);
PulseMSRemaining.TxLEDPulse = TX_RX_LED_PULSE_MS;
}
/* Read bytes from the USART receive buffer into the USB IN endpoint */
while (BufferCount--)
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_Remove(&USARTtoUSB_Buffer));
/* Turn off TX LED(s) once the TX pulse period has elapsed */
if (PulseMSRemaining.TxLEDPulse && !(--PulseMSRemaining.TxLEDPulse))
LEDs_TurnOffLEDs(LEDMASK_TX);
/* Turn off RX LED(s) once the RX pulse period has elapsed */
if (PulseMSRemaining.RxLEDPulse && !(--PulseMSRemaining.RxLEDPulse))
LEDs_TurnOffLEDs(LEDMASK_RX);
}
/* Load the next byte from the USART transmit buffer into the USART */
if (!(RingBuffer_IsEmpty(&USBtoUSART_Buffer))) {
Serial_TxByte(RingBuffer_Remove(&USBtoUSART_Buffer));
LEDs_TurnOnLEDs(LEDMASK_RX);
PulseMSRemaining.RxLEDPulse = TX_RX_LED_PULSE_MS;
}
CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
USB_USBTask();
}
}
int main(void)
{
SetupHardware();
RingBuffer_InitBuffer(&USBtoUSART_Buffer, USBtoUSART_Buffer_Data, sizeof(USBtoUSART_Buffer_Data));
RingBuffer_InitBuffer(&USARTtoUSB_Buffer, USARTtoUSB_Buffer_Data, sizeof(USARTtoUSB_Buffer_Data));
LEDs_SetAllLEDs(0);
sei();
for (;;)
{
if ((PINF & 0x01) == 0x01)
LEDs_SetAllLEDs(2);
else
LEDs_SetAllLEDs(0);
/* Only try to read in bytes from the CDC interface if the (outbound) transmit buffer is not full */
if (!(RingBuffer_IsFull(&USBtoUSART_Buffer)))
{
int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
/* Read bytes from the USB OUT endpoint into the USART transmit buffer */
if (!(ReceivedByte < 0))
RingBuffer_Insert(&USBtoUSART_Buffer, ReceivedByte);
}
/* Check if the UART receive buffer flush timer has expired or the buffer is nearly full */
uint16_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer);
if ((TIFR0 & (1 << TOV0)) || (BufferCount > (uint8_t)(sizeof(USARTtoUSB_Buffer_Data) * .75)))
{
/* Clear flush timer expiry flag */
TIFR0 |= (1 << TOV0);
/* Read bytes from the USART receive buffer into the USB IN endpoint */
while (BufferCount--)
{
/* Try to send the next byte of data to the host, abort if there is an error without dequeuing */
if (CDC_Device_SendByte(&VirtualSerial_CDC_Interface,
RingBuffer_Peek(&USARTtoUSB_Buffer)) != ENDPOINT_READYWAIT_NoError)
{
break;
}
/* Dequeue the already sent byte from the buffer now we have confirmed that no transmission error occurred */
RingBuffer_Remove(&USARTtoUSB_Buffer);
}
}
/* Load the next byte from the USART transmit buffer into the USART */
if (!(RingBuffer_IsEmpty(&USBtoUSART_Buffer)))
Serial_SendByte(RingBuffer_Remove(&USBtoUSART_Buffer));
CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
USB_USBTask();
}
}
/******************************************************************************
* Nombre de la funcion : int8_t serial_write(uint8_t data)
* returns int8_t : Si se envio un byte exitosamente, retorna 0. Si hubo
* un error, retorna -1
* data : dato a enviar
* Creada por : Alejandro Weinstein
* Fecha Creacion : 2013-04-08
*
* Descripcion : Envia un byte por el puerto serial
******************************************************************************/
int8_t serial_write(uint8_t data)
{
uint8_t err_code;
err_code = CDC_Device_SendByte(&VirtualSerial_CDC_Interface, data);
if ( err_code == ENDPOINT_READYWAIT_NoError) {
return 0;
} else {
return 1;
}
}
uint16_t VncServerSendResponse(uint8_t * buffer, uint16_t length)
{
int i;
for(i=0; i<length; i++)
{
if (CDC_Device_SendByte(&VirtualSerial_CDC_Interface,
buffer[i]) != ENDPOINT_READYWAIT_NoError)
{
break;
}
}
return i;
}
void sendCDCbyte(uint8_t b){
//TODO improve this
// try to send until sucess
while (CDC_Device_SendByte(&VirtualSerial_CDC_Interface, b) != ENDPOINT_READYWAIT_NoError){
CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
USB_USBTask();
while (1){
// TODO remove this freezing loop!
LEDs_TurnOnLEDs(LEDS_ERR);
_delay_ms(100);
LEDs_TurnOnLEDs(LEDS_ERR);
_delay_ms(100);
}
}
}
/* This function sends a byte to the USB host. */
status_t USBVC001_SendByte(const uint8_t DataByte)
{
status_t Status = (uint32_t)DAVEApp_SUCCESS;
/* Send a byte to the host. */
if(CDC_Device_SendByte(&USBVC001_CDCInterface, DataByte)
!= ENDPOINT_RWSTREAM_NoError)
{
Status = USBVC001_USBCDC001_ERROR;
}
if(CDC_Device_Flush(&USBVC001_CDCInterface) != ENDPOINT_READYWAIT_NoError)
{
Status = USBVC001_USBCDC001_ERROR;
}
return Status;
}
/* Main thread */
void usb_thread (void)
{
for (;;)
{
bcond_wait(&usb_active);
t_yield();
int16_t c;
while ((c = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface)) > 0)
stream_put(&cdc_instr, c);
t_yield();
while ( ! stream_empty(&cdc_outstr))
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, stream_get(&cdc_outstr));
CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
USB_USBTask();
}
}
void Jennic_In_Task()
{
size_t i;
Endpoint_SelectEndpoint(VirtualSerial_CDC1_Interface.Config.DataINEndpoint.Address);
if ( !Endpoint_IsINReady() )
return;
/* Read bytes from the USART receive buffer and send with CDC */
/* pass through in programming mode */
if (ringbuf_elements(&USARTtoUSB_Buffer) && jennic_in_programming_mode)
{
uint8_t byte = ringbuf_get(&USARTtoUSB_Buffer);
if (CDC_Device_SendByte(&VirtualSerial_CDC1_Interface, byte) != ENDPOINT_READYWAIT_NoError)
return;
}
}
void sendUSARTtoUSB ()
{
uint16_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer);
if (BufferCount)
{
Endpoint_SelectEndpoint(VirtualSerial_CDC_Interface.Config.DataINEndpoint.Address);
if (Endpoint_IsINReady())
{
uint8_t BytesToSend = MIN(BufferCount, (CDC_TXRX_EPSIZE - 1));
while (BytesToSend--)
{
if (CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_Peek(&USARTtoUSB_Buffer)) != ENDPOINT_READYWAIT_NoError)
{
break;
}
RingBuffer_Remove(&USARTtoUSB_Buffer);
}
}
}
}
void UARTBridge_Task(void)
{
/* Must be in the configured state for the USART Bridge code to process data */
if (USB_DeviceState != DEVICE_STATE_Configured)
return;
/* Only try to read in bytes from the CDC interface if the transmit buffer is not full */
if (!(RingBuffer_IsFull(&USBtoUART_Buffer)))
{
int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
/* Read bytes from the USB OUT endpoint into the UART transmit buffer */
if (!(ReceivedByte < 0))
RingBuffer_Insert(&USBtoUART_Buffer, ReceivedByte);
}
/* Check if the UART receive buffer flush timer has expired or buffer is nearly full */
uint16_t BufferCount = RingBuffer_GetCount(&UARTtoUSB_Buffer);
if ((TIFR0 & (1 << TOV0)) || (BufferCount > 200))
{
/* Clear flush timer expiry flag */
TIFR0 |= (1 << TOV0);
/* Read bytes from the USART receive buffer into the USB IN endpoint */
while (BufferCount--)
{
/* Try to send the next byte of data to the host, abort if there is an error without dequeuing */
if (CDC_Device_SendByte(&VirtualSerial_CDC_Interface,
RingBuffer_Peek(&UARTtoUSB_Buffer)) != ENDPOINT_READYWAIT_NoError)
{
break;
}
/* Dequeue the already sent byte from the buffer now we have confirmed that no transmission error occurred */
RingBuffer_Remove(&UARTtoUSB_Buffer);
}
}
CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
}
/** Main program entry point. This routine contains the overall program flow, including initial
* setup of all components and the main program loop.
*/
int main(void)
{
SetupHardware();
LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
for (;;)
{
CheckJoystickMovement();
/* Discard all received data on the first CDC interface */
while (CDC_Device_BytesReceived(&VirtualSerial1_CDC_Interface))
CDC_Device_ReceiveByte(&VirtualSerial1_CDC_Interface);
/* Echo all received data on the second CDC interface */
while (CDC_Device_BytesReceived(&VirtualSerial2_CDC_Interface))
CDC_Device_SendByte(&VirtualSerial2_CDC_Interface, CDC_Device_ReceiveByte(&VirtualSerial2_CDC_Interface));
CDC_Device_USBTask(&VirtualSerial1_CDC_Interface);
CDC_Device_USBTask(&VirtualSerial2_CDC_Interface);
USB_USBTask();
}
}
void UARTBridge_Task(void)
{
/* Must be in the configured state for the USART Bridge code to process data */
if (USB_DeviceState != DEVICE_STATE_Configured)
return;
/* Read bytes from the USB OUT endpoint into the UART transmit buffer */
int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
if (!(ReceivedByte < 0) && !(RingBuffer_IsFull(&USBtoUART_Buffer)))
RingBuffer_Insert(&USBtoUART_Buffer, ReceivedByte);
/* Check if the UART receive buffer flush timer has expired or buffer is nearly full */
RingBuff_Count_t BufferCount = RingBuffer_GetCount(&UARTtoUSB_Buffer);
if ((TIFR0 & (1 << TOV0)) || (BufferCount > 200))
{
TIFR0 |= (1 << TOV0);
/* Read bytes from the UART receive buffer into the USB IN endpoint */
while (BufferCount--)
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_Remove(&UARTtoUSB_Buffer));
}
CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
}
/** Main program entry point. This routine contains the overall program flow, including initial
* setup of all components and the main program loop.
*/
int main(void)
{
SetupHardware();
LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
GlobalInterruptEnable();
for (;;)
{
CheckJoystickMovement();
/* Discard all received data on the first CDC interface */
CDC_Device_ReceiveByte(&VirtualSerial1_CDC_Interface);
/* Echo all received data on the second CDC interface */
int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial2_CDC_Interface);
if (!(ReceivedByte < 0))
CDC_Device_SendByte(&VirtualSerial2_CDC_Interface, (uint8_t)ReceivedByte);
CDC_Device_USBTask(&VirtualSerial1_CDC_Interface);
CDC_Device_USBTask(&VirtualSerial2_CDC_Interface);
USB_USBTask();
}
}
void sendByte(char c){
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, (uint8_t)c);
}
/** Main program entry point. This routine contains the overall program flow, including initial
* setup of all components and the main program loop.
*/
int main(void)
{
SetupHardware();
RingBuffer_InitBuffer(&USARTtoUSB_Buffer, USARTtoUSB_Buffer_Data, sizeof(USARTtoUSB_Buffer_Data));
sei();
for (;;)
{
/* Echo bytes from the host to the target via the hardware USART */
if ((UCSR1A & (1 << UDRE1)) && CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface))
{
UDR1 = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
LEDs_TurnOnLEDs(LEDMASK_TX);
PulseMSRemaining.TxLEDPulse = TX_RX_LED_PULSE_MS;
}
/* Check if the millisecond timer has elapsed */
if (TIFR0 & (1 << OCF0A))
{
/* Clear flush timer expiry flag */
TIFR0 |= (1 << TOV0);
/* Check if the reset pulse period has elapsed, if so tristate the target reset line */
if (PulseMSRemaining.ResetPulse && !(--PulseMSRemaining.ResetPulse))
{
LEDs_TurnOffLEDs(LEDMASK_BUSY);
AVR_RESET_LINE_DDR &= ~AVR_RESET_LINE_MASK;
}
/* Check if the LEDs should be ping-ponging (during enumeration) */
if (PulseMSRemaining.PingPongLEDPulse && !(--PulseMSRemaining.PingPongLEDPulse))
{
LEDs_ToggleLEDs(LEDMASK_TX | LEDMASK_RX);
PulseMSRemaining.PingPongLEDPulse = PING_PONG_LED_PULSE_MS;
}
/* Turn off TX LED(s) once the TX pulse period has elapsed */
if (PulseMSRemaining.TxLEDPulse && !(--PulseMSRemaining.TxLEDPulse))
LEDs_TurnOffLEDs(LEDMASK_TX);
/* Turn off RX LED(s) once the RX pulse period has elapsed */
if (PulseMSRemaining.RxLEDPulse && !(--PulseMSRemaining.RxLEDPulse))
LEDs_TurnOffLEDs(LEDMASK_RX);
/* Check if the receive buffer flush period has expired */
uint16_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer);
if (!(--FlushPeriodRemaining) || (BufferCount > 200))
{
FlushPeriodRemaining = RECEIVE_BUFFER_FLUSH_MS;
/* Start RX LED indicator pulse */
if (BufferCount)
{
LEDs_TurnOnLEDs(LEDMASK_RX);
PulseMSRemaining.RxLEDPulse = TX_RX_LED_PULSE_MS;
}
/* Echo bytes from the target to the host via the virtual serial port */
while (BufferCount--)
{
/* Try to send the next byte of data to the host, abort if there is an error without dequeuing */
if (CDC_Device_SendByte(&VirtualSerial_CDC_Interface,
RingBuffer_Peek(&USARTtoUSB_Buffer)) != ENDPOINT_READYWAIT_NoError)
{
break;
}
/* Dequeue the already sent byte from the buffer now we have confirmed that no transmission error occurred */
RingBuffer_Remove(&USARTtoUSB_Buffer);
}
}
}
CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
USB_USBTask();
}
}
/** Main program entry point. This routine contains the overall program flow, including initial
* setup of all components and the main program loop.
*/
int main(void)
{
SetupHardware();
RingBuffer_InitBuffer(&USBtoUSART_Buffer);
RingBuffer_InitBuffer(&USARTtoUSB_Buffer);
setupEeprom();
sei();
for (;;)
{
// Only try to read in bytes from the CDC interface if the transmit buffer is not full
if (!(RingBuffer_IsFull(&USBtoUSART_Buffer)))
{
int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
// Read bytes from the USB OUT endpoint into the USART transmit buffer
if (!(ReceivedByte < 0))
RingBuffer_Insert(&USBtoUSART_Buffer, ReceivedByte);
}
// Check if the UART receive buffer flush timer has expired or the buffer is nearly full
RingBuff_Count_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer);
if ((TIFR0 & (1 << TOV0)) || (BufferCount > BUFFER_NEARLY_FULL))
{
TIFR0 |= (1 << TOV0);
if (USARTtoUSB_Buffer.Count) {
LEDs_TurnOnLEDs(LEDMASK_TX);
PulseMSRemaining.TxLEDPulse = TX_RX_LED_PULSE_MS;
}
// Read bytes from the USART receive buffer into the USB IN endpoint
while (BufferCount--)
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_Remove(&USARTtoUSB_Buffer));
// Turn off TX LED(s) once the TX pulse period has elapsed
if (PulseMSRemaining.TxLEDPulse && !(--PulseMSRemaining.TxLEDPulse))
LEDs_TurnOffLEDs(LEDMASK_TX);
// Turn off RX LED(s) once the RX pulse period has elapsed
if (PulseMSRemaining.RxLEDPulse && !(--PulseMSRemaining.RxLEDPulse))
LEDs_TurnOffLEDs(LEDMASK_RX);
if (ResetTimer > 0)
{
// SAM3X RESET/ERASE Sequence
// --------------------------
if (ResetTimer == 95) {
eepromInterruptDisable();
setErasePin(true);
setResetPin(false);
}
if (ResetTimer == 35) {
eepromInterruptDisable();
setErasePin(false);
setResetPin(false);
}
if (ResetTimer == 25) {
eepromInterruptDisable();
setErasePin(false);
setResetPin(true);
}
if (ResetTimer == 1) {
eepromInterruptDisable();
setErasePin(false);
setResetPin(false);
}
ResetTimer--;
} else {
setErasePin(false);
setResetPin(false);
eepromInterruptEnable();
}
}
// Load the next byte from the USART transmit buffer into the USART
if (!(RingBuffer_IsEmpty(&USBtoUSART_Buffer))) {
Serial_TxByte(RingBuffer_Remove(&USBtoUSART_Buffer));
LEDs_TurnOnLEDs(LEDMASK_RX);
PulseMSRemaining.RxLEDPulse = TX_RX_LED_PULSE_MS;
}
// CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
// USB_USBTask();
serviceEepromRequest();
CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
USB_USBTask();
}
}
void putchar_printf(char var, FILE *stream)
{
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, var);
}
int8_t read_hex_value(uint8_t byte, uint16_t *result)
{
// Keep accepting characters until a carriage return
// or we've run out of room in the buffer.
// If we're out of space, send a 'bell'
if (textBufferIndex == 5) {
CDC_Device_SendByte(&CDC_interface, 0x07);
return 0;
}
// If we received a ctrl-c, exit
if (byte == 0x03) {
return -1;
}
// Capture whichever the first newline character
// is first This indicates the end of the user input
if (byte == '\n' || byte == '\r') {
*result = 0;
// Process each digit
for (int i = 0; i < textBufferIndex; i++) {
// Shift-over existing value
*result = *result << 4;
// Is this A-F?
if (textBuffer[i] >= 'A' && textBuffer[i] <= 'F') {
*result += textBuffer[i] - 'A' + 10;
}
// Is this 0-9?
else if (textBuffer[i] >= '0' && textBuffer[i] <= '9') {
*result += textBuffer[i] - '0';
}
}
// Reset the index
textBufferIndex = 0;
return 1;
}
// Handle backspaces appropriately
if (byte == 0x08) {
// Make sure we don't backspace too far
if (textBufferIndex == 0) {
CDC_Device_SendByte(&CDC_interface, 0x07);
return 0;
}
sendStringP(backSpaceString);
textBufferIndex--;
textBuffer[textBufferIndex] = '\0';
return 0;
}
// Make every letter upper-case
if (byte >= 'a' && byte <= 'z') {
byte = byte - 32; // Crazy to-upper
}
// Filter out non-hex-digit input
if ( (byte < '0') || (byte > '9' && byte < 'A') || (byte > 'F') ) {
CDC_Device_SendByte(&CDC_interface, 0x07);
return 0;
}
// Hopefully we've sanitized input enough
CDC_Device_SendByte(&CDC_interface, byte);
textBuffer[textBufferIndex] = byte;
textBufferIndex++;
return 0;
}
void sendStringP(const uint8_t *string_in_progmem)
{
while (pgm_read_byte(string_in_progmem) != '\0')
CDC_Device_SendByte(&CDC_interface, pgm_read_byte(string_in_progmem++));
}
void usb_serial_send(const char c){
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, c);
CDC_Device_SendByte(&VirtualSerial_CDC_Interface, '\n');
}