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Changed AVRISP-MKII project to use the Watchdog interrupt for command timeouts, to reduce CPU usage and free timer 0 for other uses in the future.

Browse Source
pull/1469/head
Dean Camera 14 years ago
parent ef44b8c036
commit 26017b68b0
10 changed files with 37 additions and 35 deletions
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2
LUFA/ManPages/ChangeLog.txt
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@ -43,6 +43,8 @@
* - Changed over library projects to use the new general ring buffer library driver module
* - Added new high level TWI packet read/write commands, altered behaviour of the TWI_StartTransmission() function
* - Changed TempDataLogger project's DS1307 driver to simplify the function interface and prevent a possible race condition
* - Changed AVRISP-MKII project to use the Watchdog interrupt for command timeouts, to reduce CPU usage and free timer 0
* for other uses
*
* <b>Fixed:</b>
* - Core:

1
LUFA/ManPages/LUFAPoweredProjects.txt
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@ -88,6 +88,7 @@
* - Retrode, a USB Games Console Cartridge Reader: http://www.retrode.org
* - USBTINY-MKII, an AVRISP-MKII Clone AVR Programmer: http://tom-itx.dyndns.org:81/~webpage/boards/USBTiny_Mkii/USBTiny_Mkii_index.php
* - XMEGA Development Board, using LUFA as an On-Board Programmer: http://xmega.mattair.net/
* - Zeptoprog, a multifunction AVR programmer: http://www.mattairtech.com/index.php/featured/zeptoprog.html
*
* \section Sec_LUFAPublications Publications Mentioning LUFA
* - Elektor Magazine, "My First AVR-USB" by Antoine Authier (feature), January 2010 Issue

10
Projects/AVRISP-MKII/Lib/ISP/ISPProtocol.c
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@ -68,15 +68,14 @@ void ISPProtocol_EnterISPMode(void)
ISPProtocol_DelayMS(Enter_ISP_Params.ExecutionDelayMS);
ISPTarget_EnableTargetISP();
ISPTarget_ChangeTargetResetLine(true);
/* Continuously attempt to synchronize with the target until either the number of attempts specified
* by the host has exceeded, or the the device sends back the expected response values */
while (Enter_ISP_Params.SynchLoops-- && (ResponseStatus != STATUS_CMD_OK) && TimeoutTicksRemaining)
while (Enter_ISP_Params.SynchLoops-- && (ResponseStatus != STATUS_CMD_OK) && !(TimeoutExpired))
{
uint8_t ResponseBytes[4];
ISPTarget_ChangeTargetResetLine(true);
ISPProtocol_DelayMS(Enter_ISP_Params.PinStabDelayMS);
for (uint8_t RByte = 0; RByte < sizeof(ResponseBytes); RByte++)
{
ISPProtocol_DelayMS(Enter_ISP_Params.ByteDelay);
@ -92,6 +91,7 @@ void ISPProtocol_EnterISPMode(void)
{
ISPTarget_ChangeTargetResetLine(false);
ISPProtocol_DelayMS(Enter_ISP_Params.PinStabDelayMS);
ISPTarget_ChangeTargetResetLine(true);
}
}
@ -509,7 +509,7 @@ void ISPProtocol_SPIMulti(void)
*/
void ISPProtocol_DelayMS(uint8_t DelayMS)
{
while (DelayMS-- && TimeoutTicksRemaining)
while (DelayMS-- && !(TimeoutExpired))
_delay_ms(1);
}

10
Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c
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@ -250,7 +250,7 @@ uint8_t ISPTarget_TransferSoftSPIByte(const uint8_t Byte)
TCNT1 = 0;
TCCR1B = ((1 << WGM12) | (1 << CS11));
while (SoftSPI_BitsRemaining && TimeoutTicksRemaining);
while (SoftSPI_BitsRemaining && !(TimeoutExpired));
TCCR1B = 0;
return SoftSPI_Data;
@ -292,9 +292,9 @@ uint8_t ISPTarget_WaitWhileTargetBusy(void)
ISPTarget_SendByte(0x00);
ISPTarget_SendByte(0x00);
}
while ((ISPTarget_ReceiveByte() & 0x01) && TimeoutTicksRemaining);
while ((ISPTarget_ReceiveByte() & 0x01) && !(TimeoutExpired));
return TimeoutTicksRemaining ? STATUS_CMD_OK : STATUS_RDY_BSY_TOUT;
return (TimeoutExpired) ? STATUS_RDY_BSY_TOUT : STATUS_CMD_OK;
}
/** Sends a low-level LOAD EXTENDED ADDRESS command to the target, for addressing of memory beyond the
@ -344,9 +344,9 @@ uint8_t ISPTarget_WaitForProgComplete(const uint8_t ProgrammingMode,
ISPTarget_SendByte(PollAddress >> 8);
ISPTarget_SendByte(PollAddress & 0xFF);
}
while ((ISPTarget_TransferByte(0x00) == PollValue) && TimeoutTicksRemaining);
while ((ISPTarget_TransferByte(0x00) == PollValue) && !(TimeoutExpired));
if (!(TimeoutTicksRemaining))
if (TimeoutExpired)
ProgrammingStatus = STATUS_CMD_TOUT;
break;

22
Projects/AVRISP-MKII/Lib/V2Protocol.c
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@ -44,10 +44,10 @@ bool MustLoadExtendedAddress;
/** ISR to manage timeouts whilst processing a V2Protocol command */
ISR(TIMER0_COMPA_vect, ISR_NOBLOCK)
ISR(WDT_vect, ISR_BLOCK)
{
if (TimeoutTicksRemaining)
TimeoutTicksRemaining--;
TimeoutExpired = true;
wdt_disable();
}
/** Initialises the hardware and software associated with the V2 protocol command handling. */
@ -60,11 +60,6 @@ void V2Protocol_Init(void)
ADC_StartReading(ADC_REFERENCE_AVCC | ADC_RIGHT_ADJUSTED | VTARGET_ADC_CHANNEL_MASK);
#endif
/* Timeout timer initialization (10ms period) */
OCR0A = (((F_CPU / 1024) / 100) - 1);
TCCR0A = (1 << WGM01);
TIMSK0 = (1 << OCIE0A);
V2Params_LoadNonVolatileParamValues();
#if defined(ENABLE_ISP_PROTOCOL)
@ -80,9 +75,10 @@ void V2Protocol_ProcessCommand(void)
{
uint8_t V2Command = Endpoint_Read_Byte();
/* Start the timeout management timer */
TimeoutTicksRemaining = COMMAND_TIMEOUT_TICKS;
TCCR0B = ((1 << CS02) | (1 << CS00));
/* Start the watchdog with timeout interrupt enabled to manage the timeout */
TimeoutExpired = false;
wdt_enable(WDTO_1S);
WDTCSR |= (1 << WDIE);
switch (V2Command)
{
@ -144,8 +140,8 @@ void V2Protocol_ProcessCommand(void)
break;
}
/* Disable the timeout management timer */
TCCR0B = 0;
/* Disable the timeout management watchdog timer */
wdt_disable();
Endpoint_WaitUntilReady();
Endpoint_SelectEndpoint(AVRISP_DATA_OUT_EPNUM);

5
Projects/AVRISP-MKII/Lib/V2Protocol.h
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@ -39,6 +39,7 @@
/* Includes: */
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/wdt.h>
#include <LUFA/Drivers/USB/USB.h>
@ -68,8 +69,8 @@
/** Timeout period for each issued command from the host before it is aborted (in 10ms ticks). */
#define COMMAND_TIMEOUT_TICKS 100
/** Command timeout counter register, GPIOR for speed. */
#define TimeoutTicksRemaining GPIOR1
/** Command timeout expiration flag, GPIOR for speed. */
#define TimeoutExpired GPIOR1
/** MUX mask for the VTARGET ADC channel number. */
#define VTARGET_ADC_CHANNEL_MASK ADC_GET_CHANNEL_MASK(VTARGET_ADC_CHANNEL)

8
Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c
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@ -85,7 +85,7 @@ bool TINYNVM_WaitWhileNVMBusBusy(void)
uint8_t StatusRegister = XPROGTarget_ReceiveByte();
/* We might have timed out waiting for the status register read response, check here */
if (!(TimeoutTicksRemaining))
if (TimeoutExpired)
return false;
/* Check the status register read response to see if the NVM bus is enabled */
@ -110,7 +110,7 @@ bool TINYNVM_WaitWhileNVMControllerBusy(void)
uint8_t StatusRegister = XPROGTarget_ReceiveByte();
/* We might have timed out waiting for the status register read response, check here */
if (!(TimeoutTicksRemaining))
if (TimeoutExpired)
return false;
/* Check to see if the BUSY flag is still set */
@ -176,14 +176,14 @@ bool TINYNVM_ReadMemory(const uint16_t ReadAddress,
/* Send the address of the location to read from */
TINYNVM_SendPointerAddress(ReadAddress);
while (ReadSize-- && TimeoutTicksRemaining)
while (ReadSize-- && !(TimeoutExpired))
{
/* Read the byte of data from the target */
XPROGTarget_SendByte(TPI_CMD_SLD | TPI_POINTER_INDIRECT_PI);
*(ReadBuffer++) = XPROGTarget_ReceiveByte();
}
return (TimeoutTicksRemaining != 0);
return (TimeoutExpired == false);
}
/** Writes word addressed memory to the target's memory spaces.

10
Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c
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@ -80,7 +80,7 @@ bool XMEGANVM_WaitWhileNVMBusBusy(void)
uint8_t StatusRegister = XPROGTarget_ReceiveByte();
/* We might have timed out waiting for the status register read response, check here */
if (!(TimeoutTicksRemaining))
if (TimeoutExpired)
return false;
/* Check the status register read response to see if the NVM bus is enabled */
@ -109,7 +109,7 @@ bool XMEGANVM_WaitWhileNVMControllerBusy(void)
uint8_t StatusRegister = XPROGTarget_ReceiveByte();
/* We might have timed out waiting for the status register read response, check here */
if (!(TimeoutTicksRemaining))
if (TimeoutExpired)
return false;
/* Check to see if the BUSY flag is still set */
@ -204,7 +204,7 @@ bool XMEGANVM_GetMemoryCRC(const uint8_t CRCCommand, uint32_t* const CRCDest)
for (uint8_t i = 0; i < XMEGA_CRC_LENGTH; i++)
((uint8_t*)CRCDest)[i] = XPROGTarget_ReceiveByte();
return (TimeoutTicksRemaining != 0);
return (TimeoutExpired == false);
}
/** Reads memory from the target's memory spaces.
@ -236,10 +236,10 @@ bool XMEGANVM_ReadMemory(const uint32_t ReadAddress, uint8_t* ReadBuffer, uint16
/* Send a LD command with indirect access and post-increment to read out the bytes */
XPROGTarget_SendByte(PDI_CMD_LD | (PDI_POINTER_INDIRECT_PI << 2) | PDI_DATSIZE_1BYTE);
while (ReadSize-- && TimeoutTicksRemaining)
while (ReadSize-- && !(TimeoutExpired))
*(ReadBuffer++) = XPROGTarget_ReceiveByte();
return (TimeoutTicksRemaining != 0);
return (TimeoutExpired == false);
}
/** Writes byte addressed memory to the target's memory spaces.

2
Projects/AVRISP-MKII/Lib/XPROG/XPROGProtocol.c
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@ -143,6 +143,8 @@ static void XPROGProtocol_LeaveXPROGMode(void)
TINYNVM_DisableTPI();
#if defined(XCK_RESCUE_CLOCK_ENABLE) && defined(ENABLE_ISP_PROTOCOL)
/* If the XCK rescue clock option is enabled, we need to restart it once the
* XPROG mode has been exited, since the XPROG protocol stops it after use. */
ISPTarget_ConfigureRescueClock();
#endif

2
Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
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@ -151,7 +151,7 @@ uint8_t XPROGTarget_ReceiveByte(void)
XPROGTarget_SetRxMode();
/* Wait until a byte has been received before reading */
while (!(UCSR1A & (1 << RXC1)) && TimeoutTicksRemaining);
while (!(UCSR1A & (1 << RXC1)) && !(TimeoutExpired));
return UDR1;
}

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