/*
LUFA Library
- Copyright (C) Dean Camera, 2011.
+ Copyright (C) Dean Camera, 2013.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
- Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2013 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
- The author disclaim all warranties with regard to this
+ The author disclaims all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
static void XMEGANVM_SendAddress(const uint32_t AbsoluteAddress)
{
/* Send the given 32-bit address to the target, LSB first */
- XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[0]);
- XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[1]);
- XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[2]);
- XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[3]);
+ XPROGTarget_SendByte(AbsoluteAddress & 0xFF);
+ XPROGTarget_SendByte(AbsoluteAddress >> 8);
+ XPROGTarget_SendByte(AbsoluteAddress >> 16);
+ XPROGTarget_SendByte(AbsoluteAddress >> 24);
}
/** Sends the given NVM register address to the target.
/** Busy-waits while the NVM controller is busy performing a NVM operation, such as a FLASH page read or CRC
* calculation.
*
- * \return Boolean true if the NVM controller became ready within the timeout period, false otherwise
+ * \return Boolean \c true if the NVM controller became ready within the timeout period, \c false otherwise
*/
bool XMEGANVM_WaitWhileNVMBusBusy(void)
{
/** Waits while the target's NVM controller is busy performing an operation, exiting if the
* timeout period expires.
*
- * \return Boolean true if the NVM controller became ready within the timeout period, false otherwise
+ * \return Boolean \c true if the NVM controller became ready within the timeout period, \c false otherwise
*/
bool XMEGANVM_WaitWhileNVMControllerBusy(void)
{
/** Enables the physical PDI interface on the target and enables access to the internal NVM controller.
*
- * \return Boolean true if the PDI interface was enabled successfully, false otherwise
+ * \return Boolean \c true if the PDI interface was enabled successfully, \c false otherwise
*/
bool XMEGANVM_EnablePDI(void)
{
XPROGTarget_SendByte(PDI_CMD_STCS | PDI_RESET_REG);
XPROGTarget_SendByte(PDI_RESET_KEY);
- /* Lower direction change guard time to 0 USART bits */
+ /* Lower direction change guard time to 32 USART bits */
XPROGTarget_SendByte(PDI_CMD_STCS | PDI_CTRL_REG);
- XPROGTarget_SendByte(0x07);
+ XPROGTarget_SendByte(0x02);
/* Enable access to the XPROG NVM bus by sending the documented NVM access key to the device */
XPROGTarget_SendByte(PDI_CMD_KEY);
{
XMEGANVM_WaitWhileNVMBusBusy();
- /* Clear the RESET key in the RESET PDI register to allow the XMEGA to run */
- XPROGTarget_SendByte(PDI_CMD_STCS | PDI_RESET_REG);
- XPROGTarget_SendByte(0x00);
+ /* Clear the RESET key in the RESET PDI register to allow the XMEGA to run - must perform this until the
+ * change takes effect, as in some cases it takes multiple writes (silicon bug?).
+ */
+ do
+ {
+ /* Clear reset register */
+ XPROGTarget_SendByte(PDI_CMD_STCS | PDI_RESET_REG);
+ XPROGTarget_SendByte(0x00);
- /* Do it twice to make sure it takes effect (silicon bug?) */
- XPROGTarget_SendByte(PDI_CMD_STCS | PDI_RESET_REG);
- XPROGTarget_SendByte(0x00);
+ /* Read back the reset register, check to see if it took effect */
+ XPROGTarget_SendByte(PDI_CMD_LDCS | PDI_RESET_REG);
+ } while (XPROGTarget_ReceiveByte() != 0x00);
XPROGTarget_DisableTargetPDI();
}
* \param[in] CRCCommand NVM CRC command to issue to the target
* \param[out] CRCDest CRC Destination when read from the target
*
- * \return Boolean true if the command sequence complete successfully
+ * \return Boolean \c true if the command sequence complete successfully
*/
-bool XMEGANVM_GetMemoryCRC(const uint8_t CRCCommand, uint32_t* const CRCDest)
+bool XMEGANVM_GetMemoryCRC(const uint8_t CRCCommand,
+ uint32_t* const CRCDest)
{
+ *CRCDest = 0;
+
/* Wait until the NVM controller is no longer busy */
if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
return false;
/* Set CMDEX bit in NVM CTRLA register to start the CRC generation */
XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CTRLA);
- XPROGTarget_SendByte(1 << 0);
+ XPROGTarget_SendByte(XMEGA_NVM_BIT_CTRLA_CMDEX);
/* Wait until the NVM bus is ready again */
if (!(XMEGANVM_WaitWhileNVMBusBusy()))
/* Send the REPEAT command to grab the CRC bytes */
XPROGTarget_SendByte(PDI_CMD_REPEAT | PDI_DATSIZE_1BYTE);
- XPROGTarget_SendByte(XMEGA_CRC_LENGTH - 1);
+ XPROGTarget_SendByte(XMEGA_CRC_LENGTH_BYTES - 1);
/* Read in the CRC bytes from the target */
XPROGTarget_SendByte(PDI_CMD_LD | (PDI_POINTER_INDIRECT_PI << 2) | PDI_DATSIZE_1BYTE);
- for (uint8_t i = 0; i < XMEGA_CRC_LENGTH; i++)
+ for (uint8_t i = 0; i < XMEGA_CRC_LENGTH_BYTES; i++)
((uint8_t*)CRCDest)[i] = XPROGTarget_ReceiveByte();
- return (TimeoutTicksRemaining != 0);
+ return (TimeoutTicksRemaining > 0);
}
/** Reads memory from the target's memory spaces.
* \param[out] ReadBuffer Buffer to store read data into
* \param[in] ReadSize Number of bytes to read
*
- * \return Boolean true if the command sequence complete successfully
+ * \return Boolean \c true if the command sequence complete successfully
*/
-bool XMEGANVM_ReadMemory(const uint32_t ReadAddress, uint8_t* ReadBuffer, uint16_t ReadSize)
+bool XMEGANVM_ReadMemory(const uint32_t ReadAddress,
+ uint8_t* ReadBuffer,
+ uint16_t ReadSize)
{
/* Wait until the NVM controller is no longer busy */
if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
while (ReadSize-- && TimeoutTicksRemaining)
*(ReadBuffer++) = XPROGTarget_ReceiveByte();
- return (TimeoutTicksRemaining != 0);
+ return (TimeoutTicksRemaining > 0);
}
/** Writes byte addressed memory to the target's memory spaces.
* \param[in] WriteAddress Address to write to within the target's address space
* \param[in] Byte Byte to write to the target
*
- * \return Boolean true if the command sequence complete successfully
+ * \return Boolean \c true if the command sequence complete successfully
*/
-bool XMEGANVM_WriteByteMemory(const uint8_t WriteCommand, const uint32_t WriteAddress, const uint8_t Byte)
+bool XMEGANVM_WriteByteMemory(const uint8_t WriteCommand,
+ const uint32_t WriteAddress,
+ const uint8_t Byte)
{
/* Wait until the NVM controller is no longer busy */
if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
* \param[in] WriteBuffer Buffer to source data from
* \param[in] WriteSize Number of bytes to write
*
- * \return Boolean true if the command sequence complete successfully
+ * \return Boolean \c true if the command sequence complete successfully
*/
-bool XMEGANVM_WritePageMemory(const uint8_t WriteBuffCommand, const uint8_t EraseBuffCommand,
- const uint8_t WritePageCommand, const uint8_t PageMode, const uint32_t WriteAddress,
- const uint8_t* WriteBuffer, uint16_t WriteSize)
+bool XMEGANVM_WritePageMemory(const uint8_t WriteBuffCommand,
+ const uint8_t EraseBuffCommand,
+ const uint8_t WritePageCommand,
+ const uint8_t PageMode,
+ const uint32_t WriteAddress,
+ const uint8_t* WriteBuffer,
+ uint16_t WriteSize)
{
if (PageMode & XPRG_PAGEMODE_ERASE)
{
/* Set CMDEX bit in NVM CTRLA register to start the buffer erase */
XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CTRLA);
- XPROGTarget_SendByte(1 << 0);
+ XPROGTarget_SendByte(XMEGA_NVM_BIT_CTRLA_CMDEX);
}
if (WriteSize)
* \param[in] EraseCommand NVM erase command to send to the device
* \param[in] Address Address inside the memory space to erase
*
- * \return Boolean true if the command sequence complete successfully
+ * \return Boolean \c true if the command sequence complete successfully
*/
-bool XMEGANVM_EraseMemory(const uint8_t EraseCommand, const uint32_t Address)
+bool XMEGANVM_EraseMemory(const uint8_t EraseCommand,
+ const uint32_t Address)
{
/* Wait until the NVM controller is no longer busy */
if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
/* Set CMDEX bit in NVM CTRLA register to start the erase sequence */
XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CTRLA);
- XPROGTarget_SendByte(1 << 0);
+ XPROGTarget_SendByte(XMEGA_NVM_BIT_CTRLA_CMDEX);
}
else if (EraseCommand == XMEGA_NVM_CMD_ERASEEEPROM)
{
/* Set CMDEX bit in NVM CTRLA register to start the buffer erase */
XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CTRLA);
- XPROGTarget_SendByte(1 << 0);
+ XPROGTarget_SendByte(XMEGA_NVM_BIT_CTRLA_CMDEX);
/* Wait until the NVM controller is no longer busy */
if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
/* Set CMDEX bit in NVM CTRLA register to start the EEPROM erase sequence */
XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CTRLA);
- XPROGTarget_SendByte(1 << 0);
+ XPROGTarget_SendByte(XMEGA_NVM_BIT_CTRLA_CMDEX);
}
else
{
projects / pub / USBasp.git / blobdiff