BYTE getsUSBUSART(BYTE *buffer, BYTE len) {
cdc_Out_len = 0;
if (0 == (Outbdp->BDSTAT & UOWN)) // Do we have a packet from host?
{
// Adjust the expected number of BYTEs to equal
// the actual number of BYTEs received.
if (len > Outbdp->BDCNT)
len = Outbdp->BDCNT;
// Copy data from dual-ram buffer to user's buffer
for (cdc_Out_len = 0; cdc_Out_len < len; cdc_Out_len++)
buffer[cdc_Out_len] = cdc_Out_buffer[cdc_Out_len];
// Prepare dual-ram buffer for next OUT transaction
if (!TestUsbInterruptEnabled()) {
FAST_usb_handler(); // JTR2 Pop non-EP0 (USB IN) tranfers from the FIFO and also give SETUP PACKETs a chance.
}
Outbdp->BDCNT = CDC_BUFFER_SIZE;
Outbdp->BDSTAT = ((Outbdp->BDSTAT ^ DTS) & DTS) | UOWN | DTSEN;
}//end if
return cdc_Out_len;
}//end getsUSBUSART
BYTE WaitInReady() // JTR2 added reduced overhead
{
while ((Inbdp->BDSTAT & UOWN)) {
if (!TestUsbInterruptEnabled()) {
if (0 != FAST_usb_handler()) // JTR2 Pop non-EP0 (USB IN) tranfers from the FIFO and also give SETUP PACKETs a chance.
return 0;
}
}
return 1;
}//end WaitInReady
BYTE putPARTARRAYUSBUSART(BYTE *data, BYTE length) // JTR2 added reduced overhead
{
while ((Inbdp->BDSTAT & UOWN)) {
if (!TestUsbInterruptEnabled()) {
if (0 != FAST_usb_handler()) { // JTR2 Pop non-EP0 (USB IN) tranfers from the FIFO and also give SETUP PACKETs a chance.
return 0xff;
}
}
}
Inbdp->BDADDR = data;
Inbdp->BDCNT = length;
Inbdp->BDSTAT = ((Inbdp->BDSTAT ^ DTS) & DTS) | UOWN | DTSEN;
FAST_usb_handler();
return length;
}//end putUSBUSARTFAST
void main(void)
{
unsigned char c,x,y,led;
unsigned long l;
// Default all pins to digital
ADCON1 |= 0x0F;
// Disable USB external transceiver to allow RB1/RB2
UCFGbits.UTRDIS = 0;
// set pin to output
TRISBbits.TRISB0 = 0;
TRISBbits.TRISB1 = 0;
TRISBbits.TRISB2 = 0;
TRISBbits.TRISB3 = 0;
LED0 = 1;
LED1 = LED2 = LED3 = 0;
// TODO: Remove magic with macro
usb_init(cdc_device_descriptor, cdc_config_descriptor, cdc_str_descs, USB_NUM_STRINGS);
usb_start();
initCDC();
usbbufflush();
do {
if (!TestUsbInterruptEnabled())
USBDeviceTasks();
switch(usb_device_state){
case DETACHED_STATE:
LED1 = 0; LED2 = 0; LED3 = 0;
case ATTACHED_STATE:
LED1 = 0; LED2 = 0; LED3 = 1;
case POWERED_STATE:
LED1 = 0; LED2 = 1; LED3 = 0;
case DEFAULT_STATE:
LED1 = 0; LED2 = 1; LED3 = 1;
case ADR_PENDING_STATE:
LED1 = 1; LED2 = 0; LED3 = 0;
case ADDRESS_STATE:
LED1 = 1; LED2 = 0; LED3 = 1;
case CONFIGURED_STATE:
LED1 = 1; LED2 = 1; LED3 = 0;
}
} while (usb_device_state < CONFIGURED_STATE);
while(1);
#if 0
// Initiate Osc with 8MHz (only relevant if you use the internal oscillator)
//OSCCON = 0x70;
initCDC();
// TODO: Remove magic with macro
usb_init(cdc_device_descriptor, cdc_config_descriptor, cdc_str_descs, USB_NUM_STRINGS);
usb_start();
#if defined (USB_INTERRUPTS)
//EnableUsbInterrupt(USB_TRN + USB_SOF + USB_UERR + USB_URST);
EnableUsbInterrupt(USB_STALL + USB_IDLE + USB_TRN + USB_ACTIV + USB_SOF + USB_UERR + USB_URST);
EnableUsbInterrupts();
#endif
usbbufflush(); //flush USB input buffer system
led = UCFGbits.UTRDIS;
LED0=0;
LED1=0;
LED2=0;
LED3=0;
while(1){
LED1 = LED1 ? 0 : 1;
for(l = 0; l < 10; ++l);
}
LED0=1;
LED1=1;
LED2=1;
LED3=1;
delay_ms(500);
#if 0
while(1)
{
LED0 = 1;
delay_ms(250);
LED0 = 0;
delay_ms(250);
}
#endif
LED0 = 0;
LED1 = 0;
LED2 = 0;
LED3 = 0;
delay_ms(500);
while(1);
do
{ LED2=1;
LED3 = 0;
#ifndef USB_INTERRUPTS
//service USB tasks
//Guaranteed one pass in polling mode
//even when usb_device_state == CONFIGURED_STATE
if (!TestUsbInterruptEnabled())
{
USBDeviceTasks();
LED3 = 1;
}
#endif
if ((usb_device_state < DEFAULT_STATE))
{ // JTR2 no suspendControl available yet || (USBSuspendControl==1) ){
LED0=1;
LED1=0;
} else if (usb_device_state < CONFIGURED_STATE)
{
LED0=1;
LED1=1;
}else if((usb_device_state == CONFIGURED_STATE))
{
LED0=0;
LED1=1;
}
LED2=0;
delay_ms(1000);
} while (usb_device_state < CONFIGURED_STATE);
LED0 = 0;
LED1 = 0;
LED2 = 1;
#if 1
while(1)
{
LED0 = led;
led = led ? 0 : 1;
#ifndef USB_INTERRUPTS
//service USB tasks
//Guaranteed one pass in polling mode
//even when usb_device_state == CONFIGURED_STATE
if (!TestUsbInterruptEnabled())
USBDeviceTasks();
#endif
usbbufservice(); //service USB buffer system
if (usbbufgetbyte(&c) == 1)
{
WaitInReady();
cdc_In_buffer[0] = c; //answer OK
putUnsignedCharArrayUsbUsart(cdc_In_buffer, 1);
}
}
#endif
// Disable USB external transceiver to allow RB1/RB2
UCFGbits.UTRDIS = 0;
// set pin to output
TRISBbits.TRISB0 = 0;
TRISBbits.TRISB1 = 0;
TRISBbits.TRISB2 = 0;
// start a loop blinking the led
while(1)
{
LED0 = 1;
delay_ms(250);
LED0 = 0;
delay_ms(250);
}
#endif
}
void main(void){
u8 i,cmd, param[9],c;
u16 temp; // TODO to be removed later on
long l;
signed int x, y, z;
signed char x8, y8, z8;
static unsigned char ledtrig;
initCDC(); // JTR this function has been highly modified It no longer sets up CDC endpoints.
init(); //setup the crystal, pins
mma_init();
usb_init(cdc_device_descriptor, cdc_config_descriptor, cdc_str_descs, USB_NUM_STRINGS); // TODO: Remove magic with macro
usb_start();
usbbufflush(); //flush USB input buffer system
i = mma_read( MMA_I2CAD );
//if((i&~0b10000000)!=0x1d)while(1);
mma_write( MMA_I2CAD, 0x1d | MMA_I2CDIS_bit ); // disable I2C
i = mma_read( MMA_CTL1 );
mma_write( MMA_CTL1, i |= MMA_DFBW_bit ); // high output data rate
mma_write( MMA_MCTL, 0b00000101 ); // 2g range; measurement mode
//mma_calibrate_offset( 0, 0, 0 );
//LEDs
//PWM on cathode
TRISAbits.TRISA0=0;
LATAbits.LATA0=1; //enable cathode
//setup LEDs
LATB=0;
TRISB=0;
ledtrig=1; //only shut LED off once
// Never ending loop services each task in small increments
while (1) {
do {
if (!TestUsbInterruptEnabled()) //JTR3 added
USBDeviceTasks(); ////service USB tasks Guaranteed one pass in polling mode even when usb_device_state == CONFIGURED_STATE
if ((usb_device_state < DEFAULT_STATE)) { // JTR2 no suspendControl available yet || (USBSuspendControl==1) ){
//LedOff();
} else if (usb_device_state < CONFIGURED_STATE) {
//LedOn();
}else if((ledtrig==1) && (usb_device_state == CONFIGURED_STATE)){
//LedOff();
ledtrig=0;
}
} while (usb_device_state < CONFIGURED_STATE);
usbbufservice();//load any USB data into byte buffer
if(usbbufgetbyte(&inByte) == 1){
switch(inByte){//switch on the command
case 0x00:
WaitInReady(); //it's always ready, but this could be done better
param[0]='B';
param[1]='B';
param[2]='I';
param[3]='O';
param[4]='1';
putUnsignedCharArrayUsbUsart(param,5);
break;
case 0x01:
mma_get_average8( 4, &x8, &y8, &z8 );
param[0]=x8;
param[1]=y8;
param[2]=z8;
WaitInReady(); //it's always ready, but this could be done better
putUnsignedCharArrayUsbUsart(param,3);
break;
default: //error
break;
}
}//if data
}//while
//#endif
}//end main
