misc. bootloader fixes: increased wait time after receiving avrdude 'Q', increased bootloader timeout, and fixed LED one-shot timing

This commit is contained in:
Zach Eveland 2011-09-08 16:23:29 -04:00
parent e870f070db
commit 11e3921c81
3 changed files with 110 additions and 97 deletions

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@ -1,4 +1,4 @@
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@ -210,7 +210,7 @@ int main()
if (cmd == 'Q')
break;
}
_timeout = 1; // signal to exit the bootloader
_timeout = 1000; // wait a moment before exiting the bootloader - may need to finish responding to 'Q' for example
_ejected = 1;
}
}
@ -232,7 +232,8 @@ void LEDPulse()
void Reboot()
{
/* TODO - ZE - this should probably be a WDT reset instead, right? */
TXLED0; // switch off the RX and TX LEDs before starting the user sketch
RXLED0;
UDCON = 1; // Detatch USB
UDIEN = 0;
asm volatile ( // Reset vector to run firmware

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@ -29,6 +29,11 @@
#define EP_TYPE_ISOCHRONOUS_IN 0x41
#define EP_TYPE_ISOCHRONOUS_OUT 0x40
/** Pulse generation counters to keep track of the number of milliseconds remaining for each pulse type */
#define TX_RX_LED_PULSE_MS 100
u8 TxLEDPulse; /**< Milliseconds remaining for data Tx LED pulse */
u8 RxLEDPulse; /**< Milliseconds remaining for data Rx LED pulse */
void Reboot();
//==================================================================
@ -85,6 +90,7 @@ static
void Send(volatile const u8* data, u8 count)
{
TXLED1; // light the TX LED
TxLEDPulse = TX_RX_LED_PULSE_MS;
while (count--)
UEDATX = *data++;
}
@ -92,6 +98,7 @@ void Send(volatile const u8* data, u8 count)
void Recv(volatile u8* data, u8 count)
{
RXLED1; // light the RX LED
RxLEDPulse = TX_RX_LED_PULSE_MS;
while (count--)
*data++ = UEDATX;
}
@ -99,12 +106,14 @@ void Recv(volatile u8* data, u8 count)
static inline u8 Recv8()
{
RXLED1; // light the RX LED
RxLEDPulse = TX_RX_LED_PULSE_MS;
return UEDATX;
}
static inline void Send8(u8 d)
{
TXLED1; // light the TX LED
TxLEDPulse = TX_RX_LED_PULSE_MS;
UEDATX = d;
}
@ -451,12 +460,17 @@ void USBGeneralInterrupt()
{
InitEP(0,EP_TYPE_CONTROL,EP_SINGLE_64); // init ep0
_usbConfiguration = 0; // not configured yet
//UEIENX = 1 << RXSTPE;
}
// Start of Frame
// Start of Frame - happens every millisecond so we use it for TX and RX LED one-shot timing, too
if (udint & (1<<SOFI))
{
// check whether the one-shot period has elapsed. if so, turn off the LED
if (TxLEDPulse && !(--TxLEDPulse))
TXLED0;
if (RxLEDPulse && !(--RxLEDPulse))
RXLED0;
if (!_ejected)
_timeout = 0;
}
@ -477,20 +491,13 @@ int USBGetChar()
if (!ReadWriteAllowed())
ReleaseRX();
return c;
} else {
u8 temp = 0;
for (temp=100; temp; temp--)
asm volatile("nop\n\t" "nop\n\t" "nop\n\t" "nop\n\t"::);
RXLED0; // we turn the RX and TX LEDs on in the relevant Send or Recv instruction
TXLED0; // we turn them off here after some time has passed to ensure a minimum on time.
}
}
if (!--_timeout) {
TXLED0; // switch off the RX and TX LEDs before starting the user sketch
RXLED0;
Reboot(); // USB not connected, run firmware
}
_delay_us(100); // stretch out the bootloader period to about 5 seconds after enumeration
LEDPulse();
}
return -1;