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Add function documentation to the AVRISP project.

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This commit is contained in:
Dean Camera 2009-08-25 13:15:30 +00:00
parent 73801c73a1
commit 8aee4cb2f2
7 changed files with 152 additions and 30 deletions
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62
Projects/Incomplete/AVRISP/Lib/V2ProtocolTarget.c
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@ -36,20 +36,36 @@
#include "V2ProtocolTarget.h"
/** Current memory address for FLASH/EEPROM memory read/write commands */
uint32_t CurrentAddress;
uint32_t CurrentAddress;
/** Converts the given AVR Studio SCK duration parameter (set by a SET PARAM command from the host) to the nearest
* possible SPI clock prescaler mask for passing to the SPI_Init() routine.
*
* \return Nearest SPI prescaler mask for the given SCK frequency
*/
uint8_t V2Protocol_GetSPIPrescalerMask(void)
{
static const uint8_t SPIMaskFromSCKDuration[TOTAL_PROGRAMMING_SPEEDS] =
{
#if (F_CPU == 8000000)
SPI_SPEED_FCPU_DIV_2,
#endif
SPI_SPEED_FCPU_DIV_2, SPI_SPEED_FCPU_DIV_4, SPI_SPEED_FCPU_DIV_8,
SPI_SPEED_FCPU_DIV_16, SPI_SPEED_FCPU_DIV_32, SPI_SPEED_FCPU_DIV_64
#if (F_CPU == 16000000)
, SPI_SPEED_FCPU_DIV_128
#endif
#if (F_CPU == 8000000)
SPI_SPEED_FCPU_DIV_2, // AVRStudio = 8MHz SPI, Actual = 4MHz SPI
SPI_SPEED_FCPU_DIV_2, // AVRStudio = 4MHz SPI, Actual = 4MHz SPI
SPI_SPEED_FCPU_DIV_4, // AVRStudio = 2MHz SPI, Actual = 2MHz SPI
SPI_SPEED_FCPU_DIV_8, // AVRStudio = 1MHz SPI, Actual = 1MHz SPI
SPI_SPEED_FCPU_DIV_16, // AVRStudio = 500KHz SPI, Actual = 500KHz SPI
SPI_SPEED_FCPU_DIV_32, // AVRStudio = 250KHz SPI, Actual = 250KHz SPI
SPI_SPEED_FCPU_DIV_64 // AVRStudio = 125KHz SPI, Actual = 125KHz SPI
#if (F_CPU == 16000000)
SPI_SPEED_FCPU_DIV_2, // AVRStudio = 8MHz SPI, Actual = 8MHz SPI
SPI_SPEED_FCPU_DIV_4, // AVRStudio = 4MHz SPI, Actual = 4MHz SPI
SPI_SPEED_FCPU_DIV_8, // AVRStudio = 2MHz SPI, Actual = 2MHz SPI
SPI_SPEED_FCPU_DIV_16, // AVRStudio = 1MHz SPI, Actual = 1MHz SPI
SPI_SPEED_FCPU_DIV_32, // AVRStudio = 500KHz SPI, Actual = 500KHz SPI
SPI_SPEED_FCPU_DIV_64, // AVRStudio = 250KHz SPI, Actual = 250KHz SPI
SPI_SPEED_FCPU_DIV_128 // AVRStudio = 125KHz SPI, Actual = 125KHz SPI
#else
#error No SPI prescaler masks for chosen F_CPU speed.
#endif
};
uint8_t SCKDuration = V2Params_GetParameterValue(PARAM_SCK_DURATION);
@ -60,6 +76,11 @@ uint8_t V2Protocol_GetSPIPrescalerMask(void)
return SPIMaskFromSCKDuration[SCKDuration];
}
/** Asserts or deasserts the target's reset line, using the correct polarity as set by the host using a SET PARAM command.
* When not asserted, the line is tristated so as not to intefere with normal device operation.
*
* \param ResetTarget Boolean true when the target should be held in reset, false otherwise
*/
void V2Protocol_ChangeTargetResetLine(bool ResetTarget)
{
if (ResetTarget)
@ -76,6 +97,18 @@ void V2Protocol_ChangeTargetResetLine(bool ResetTarget)
}
}
/** Waits until the last issued target memory programming command has completed, via the check mode given and using
* the given parameters.
*
* \param ProgrammingMode Programming mode used and completion check to use, a mask of PROG_MODE_* constants
* \param PollAddress Memory address to poll for completion if polling check mode used
* \param PollValue Poll value to check against if polling check mode used
* \param DelayMS Milliseconds to delay before returning if delay check mode used
* \param ReadMemCommand Device low-level READ MEMORY command to send if value check mode used
*
* \return V2 Protocol status \ref STATUS_CMD_OK if the no timeout occurred, \ref STATUS_RDY_BSY_TOUT or
* \ref STATUS_CMD_TOUT otherwise
*/
uint8_t V2Protocol_WaitForProgComplete(uint8_t ProgrammingMode, uint16_t PollAddress, uint8_t PollValue,
uint8_t DelayMS, uint8_t ReadMemCommand)
{
@ -101,7 +134,7 @@ uint8_t V2Protocol_WaitForProgComplete(uint8_t ProgrammingMode, uint16_t PollAdd
while ((SPI_TransferByte(0x00) != PollValue) && (TCNT0 < TARGET_BUSY_TIMEOUT_MS));
if (TCNT0 >= TARGET_BUSY_TIMEOUT_MS)
ProgrammingStatus = STATUS_RDY_BSY_TOUT;
ProgrammingStatus = STATUS_CMD_TOUT;
break;
case PROG_MODE_WORD_READYBUSY_MASK:
@ -113,6 +146,11 @@ uint8_t V2Protocol_WaitForProgComplete(uint8_t ProgrammingMode, uint16_t PollAdd
return ProgrammingStatus;
}
/** Waits until the target has completed the last operation, by continuously polling the device's
* BUSY flag until it is cleared, or until the \ref TARGET_BUSY_TIMEOUT_MS timeout period has expired.
*
* \return V2 Protocol status \ref STATUS_CMD_OK if the no timeout occurred, \ref STATUS_RDY_BSY_TOUT otherwise
*/
uint8_t V2Protocol_WaitWhileTargetBusy(void)
{
TCNT0 = 0;
@ -132,6 +170,10 @@ uint8_t V2Protocol_WaitWhileTargetBusy(void)
return STATUS_CMD_OK;
}
/** Sends a low-level LOAD EXTENDED ADDRESS command to the target, for addressing of memory beyond the
* 64KB boundary. This sends the command with the correct address as indicated by the current address
* pointer variable set by the host when a SET ADDRESS command is issued.
*/
void V2Protocol_LoadExtendedAddress(void)
{
SPI_SendByte(0x4D);