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Arduino1 Bootloader for AT90USB128x: USB can be enabled.

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opendous
2011-10-30 06:08:38 +00:00
parent 03e4321ea8
commit 2c2a0da46b
3 changed files with 21 additions and 12 deletions
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2
Micropendous/Firmware/Arduino1_Bootloader/Makefile
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@@ -5,7 +5,7 @@
## General Flags
PROJECT = DiskLoader
TARGET = DiskLoader.elf
CC = avr-gcc
CC = avr-gcc -E
# Select MCU name and bootloader start address - uncomment _ONE_ of the following pairs
#

4
Micropendous/Firmware/Arduino1_Bootloader/src/DiskLoader.cpp
View File

@@ -243,7 +243,7 @@ void LEDPulse()
void Reboot()
{
/*
TXLED0; // switch off the RX and TX LEDs before starting the user sketch
RXLED0;
UDCON = 1; // Detatch USB
@@ -253,5 +253,5 @@ void Reboot()
"clr r31\n"
"ijmp\n"
::);
*/
}

27
Micropendous/Firmware/Arduino1_Bootloader/src/USBCore.cpp
View File

@@ -193,19 +193,22 @@ void USBInit(void)
_usbConfiguration = 0;
_ejected = 0;
// TODO: correctly check for other boards
DDRE |= (1 << PE7); PORTE &= ~(1 << PE7); // enable the USB signal switch to the USB-B connector
// power on internal regulator
#if (defined(__AVR_AT90USB162__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__))
UHWCON |= (1 << UIMOD); // TODO: need this for U2 devices?
REGCR = (0 << REGDIS); // there is no UHWCON on the U2 USB AVR devices
#elif (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
UHWCON = 0x01;
UHWCON = (1 << UVREGE);
#elif (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_ATmega32U6__))
UHWCON |= (1 << UIMOD);
UHWCON = ((1 << UIMOD) | (1 << UVREGE));
#else
#error Selected device not supported by this bootloader
#endif
USBCON = (1<<USBE)|(1<<FRZCLK); // clock frozen, usb enabled
USBCON = ((1<<USBE) | (1<<FRZCLK)); // clock frozen, usb enabled
#if (defined(__AVR_AT90USB162__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__))
@@ -221,17 +224,17 @@ void USBInit(void)
#endif
while (!(PLLCSR & (1<<PLOCK))) // wait for PLL to lock
while (!(PLLCSR & (1 << PLOCK))) // wait for PLL to lock
;
// start USB
#if (defined(__AVR_AT90USB162__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__))
USBCON = (1<<USBE);
USBCON = ((1 << USBE) | (0 << FRZCLK));
#else
USBCON = ((1<<USBE)|(1<<OTGPADE));
USBCON = ((1 << USBE) | (1 << OTGPADE) | (0 << FRZCLK));
#endif
// enable attach resistor by disabline detach
// enable attach resistor by disabling USB line detach
UDCON = (0 << DETACH);
}
@@ -306,7 +309,13 @@ static void InitEndpoints()
UECFG0X = pgm_read_byte(_initEndpoints+i);
UECFG1X = EP_DOUBLE_64;
}
UERST = 0x7E; // And reset them
// Reset all endpoints except EP0
#if (defined(__AVR_AT90USB162__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__))
UERST = ((1<<EPRST6) | (1<<EPRST5) | (1<<EPRST4) | (1<<EPRST3) | (1<<EPRST2) | (1<<EPRST1));
#else // all other USB AVRs
UERST = ((1<<EPRST4) | (1<<EPRST3) | (1<<EPRST2) | (1<<EPRST1));
#endif
UERST = 0;
}