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Complete TPI protocol code to enter and exit TPI programming mode for the ATTINY 6-pin devices.

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This commit is contained in:
Dean Camera 2009-12-24 03:02:26 +00:00
parent 65fcebf478
commit 35dac470f2
4 changed files with 36 additions and 38 deletions
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12
Projects/AVRISP/Lib/XPROG/XPROGProtocol.c
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@ -132,7 +132,13 @@ static void XPROGProtocol_EnterXPROGMode(void)
/* Enable TPI programming mode with the attached target */
XPROGTarget_EnableTargetTPI();
// TODO - enable NVM bus via KEY
/* Enable access to the XPROG NVM bus by sending the documented NVM access key to the device */
XPROGTarget_SendByte(TPI_CMD_SKEY);
for (uint8_t i = sizeof(TPI_NVMENABLE_KEY); i > 0; i--)
XPROGTarget_SendByte(TPI_NVMENABLE_KEY[i - 1]);
/* Wait until the NVM bus becomes active */
NVMBusEnabled = TINYNVM_WaitWhileNVMBusBusy();
}
Endpoint_Write_Byte(CMD_XPROG);
@ -159,7 +165,9 @@ static void XPROGProtocol_LeaveXPROGMode(void)
}
else
{
// TODO - Disable TPI via register
/* Clear the NVMEN bit in the TPI CONTROL register to disable TPI mode */
XPROGTarget_SendByte(TPI_CMD_SSTCS | TPI_CTRL_REG);
XPROGTarget_SendByte(0x00);
XPROGTarget_DisableTargetTPI();
}