void MIPS32 IntConfigureSystem(u8 mode)
{
unsigned int temp;
asm("di"); // Disable all interrupts
temp = _CP0_GET_STATUS(); // Get Status
temp |= 0x00400000; // Set BEV bit
_CP0_SET_STATUS(temp); // Update Status
#if defined(PIC32_PINGUINO_220) || defined(GENERIC32MX250F128) || defined(GENERIC32MX220F032)
_CP0_SET_EBASE(0xBD003000); // Set an EBase value of 0xBD003000
#else
_CP0_SET_EBASE(0xBD005000); // Set an EBase value of 0xBD005000
#endif
_CP0_SET_INTCTL(0x00000020); // Set the Vector Spacing to non-zero value
temp = _CP0_GET_CAUSE(); // Get Cause
temp |= 0x00800000; // Set IV
_CP0_SET_CAUSE(temp); // Update Cause
temp = _CP0_GET_STATUS(); // Get Status
temp &= 0xFFBFFFFD; // Clear BEV and EXL
_CP0_SET_STATUS(temp); // Update Status
switch (mode)
{
case INT_SYSTEM_CONFIG_MULT_VECTOR:
// Set the CP0 registers for multi-vector interrupt
INTCONSET = 0x1000; // Set MVEC bit
break;
case INT_SYSTEM_CONFIG_SINGLE_VECTOR:
// Set the CP0 registers for single-vector interrupt
INTCONCLR = 0x1000; // Clear MVEC bit
break;
}
asm("ei"); // Enable all interrupts
}
/********************************************************************
* Function: static void InitializeSystem(void)
*
* PreCondition: None
*
* Input: None
*
* Output: None
*
* Side Effects: None
*
* Overview: InitializeSystem is a centralize initialization
* routine. All required USB initialization routines
* are called from here.
*
* User application initialization routine should
* also be called from here.
*
* Note: None
*******************************************************************/
static void _MIPS32 InitializeSystem(void)
{
// #elif defined(__C32__)
// AD1PCFG = 0xFFFF; FIXME!
// #endif
#if defined(__32MX460F512L__)|| defined(__32MX795F512L__)
// Configure the PIC32 core for the best performance
// at the operating frequency. The operating frequency is already set to
// 60MHz through Device Config Registers
// SYSTEMConfigPerformance(60000000);
#endif
// SYSTEMConfigPerformance(40000000);
_CP0_SET_EBASE(_RESET_ADDR); // 割り込みベクターを9D00_1000 に変更する.
// The USB specifications require that USB peripheral devices must never source
// current onto the Vbus pin. Additionally, USB peripherals should not source
// current on D+ or D- when the host/hub is not actively powering the Vbus line.
// When designing a self powered (as opposed to bus powered) USB peripheral
// device, the firmware should make sure not to turn on the USB module and D+
// or D- pull up resistor unless Vbus is actively powered. Therefore, the
// firmware needs some means to detect when Vbus is being powered by the host.
// A 5V tolerant I/O pin can be connected to Vbus (through a resistor), and
// can be used to detect when Vbus is high (host actively powering), or low
// (host is shut down or otherwise not supplying power). The USB firmware
// can then periodically poll this I/O pin to know when it is okay to turn on
// the USB module/D+/D- pull up resistor. When designing a purely bus powered
// peripheral device, it is not possible to source current on D+ or D- when the
// host is not actively providing power on Vbus. Therefore, implementing this
// bus sense feature is optional. This firmware can be made to use this bus
// sense feature by making sure "USE_USB_BUS_SENSE_IO" has been defined in the
// HardwareProfile.h file.
#if defined(USE_USB_BUS_SENSE_IO)
tris_usb_bus_sense = INPUT_PIN; // See HardwareProfile.h
#endif
// If the host PC sends a GetStatus (device) request, the firmware must respond
// and let the host know if the USB peripheral device is currently bus powered
// or self powered. See chapter 9 in the official USB specifications for details
// regarding this request. If the peripheral device is capable of being both
// self and bus powered, it should not return a hard coded value for this request.
// Instead, firmware should check if it is currently self or bus powered, and
// respond accordingly. If the hardware has been configured like demonstrated
// on the PICDEM FS USB Demo Board, an I/O pin can be polled to determine the
// currently selected power source. On the PICDEM FS USB Demo Board, "RA2"
// is used for this purpose. If using this feature, make sure "USE_SELF_POWER_SENSE_IO"
// has been defined in HardwareProfile - (platform).h, and that an appropriate I/O pin
// has been mapped to it.
#if defined(USE_SELF_POWER_SENSE_IO)
tris_self_power = INPUT_PIN; // See HardwareProfile.h
#endif
UserInit();
USBDeviceInit(); //usb_device.c. Initializes USB module SFRs and firmware
//variables to known states.
}//end InitializeSystem
void MIPS32 IntSetEBASE(unsigned int ebase_address)
{
_CP0_SET_EBASE(ebase_address);
}
