// see usb_hw_layer.h for documentation
void usb_init(void)
{
usb_init_cs();
do
{
usb_task();
} while (usb_state != USB_STATE_POWERED);
}
//------------------------------------------------------------------------------
// Main Function:
//------------------------------------------------------------------------------
void main()
{
//--------------------------------------------------------------------------
// PIC Initialization Section
//--------------------------------------------------------------------------
Disable_Interrupts(GLOBAL); // all interrupts OFF
Setup_adc(ADC_OFF); // ADC not needed
Setup_adc_ports(NO_ANALOGS); // No ADC ports needed
Setup_timer_0(RTCC_INTERNAL|RTCC_DIV_256); // Timer 0 set for 42.6us,
Setup_timer_1(T1_DISABLED); // Timer 1
Set_Tris_A(TRISA_Enabled); // SPI Disabled
Set_Tris_B(TRISB_Disable); // Flash SPI Disabled
Set_Tris_C(TRISC_Disable); // Flash SPI Disabled
Output_high(FLASH_SELECT); // Slash Select High
Output_high(FLASH_CLOCK); // Pulse the clock
Output_low(RTC_RST); // Disable RTC
Output_High(FPGALoad); // FPGA Upload pin
Output_High(FPGAReset); // FPGA reset off
Output_High(TestLED); // indication of boot up
spi_enabled = False; // ZBC to PIC SPI disabled initially
spi_write = False; // ZBC to PIC SPI disabled initially
Refresh_RTCSPI(); // Refresh data from RTC into SPI buffer
//--------------------------------------------------------------------------
// USB Initialization Section
//--------------------------------------------------------------------------
usb_init_cs(); // Initialize the USB Connection
if(read_eeprom(BOOT_TYPE) > 0) { // We want boot from FLASH
FlashToFPGA(); // If not hooked up to USB then try to init
Output_Low(FPGAReset); // FPGA reset off
Output_High(FPGAReset); // FPGA reset off
Output_Low(TestLED); // Turn off Test LED
}
else {
FGPA_SPI_Init(); // Put PIC in SPI Slave mode
}
//--------------------------------------------------------------------------
// Main Command Loop:
//--------------------------------------------------------------------------
do { // Always do USB Task
usb_task(); // so it will detect USB pluging in
if(usb_enumerated()) { // Are we plugged into the USB port ?
usb_rcvdata_task(); // If so, check for data
}
if(spi_enabled) { // if ZBC to PIC SPI enabled, then check
if(SSP_HAS_DATA()) {
Handle_SPI(); // Handle SPI request from ZBC
}
} // Otherwise... just
} while(True); // Continue forever, what else can we do ?
}
void main(void)
{
int i;
set_tris_b(0x10000000);
output_high(PIN_B0);
delay_ms(500);
output_low(PIN_B0);
fprintf(A, "rs232 init...\n\r");
usb_init_cs();
while(1)
{
if(input(PIN_B7))
{
output_high(PIN_B0);
usb_task();
while(input(PIN_B7))
{
if (usb_enumerated())
{
if (usb_kbhit(1))
{
receive_msg();
//usb_get_packet(1, rdata, 1);
//fprintf(A, "%u", rdata[0]);
//switch(rdata[0])
//{
// case 0x01: output_high(PIN_B0); break;
// case 0x02: output_low(PIN_B0); break;
//}
}
}
}
usb_detach();
output_low(PIN_B0);
}
}
}
