/** Initializes the hardware and software associated with the V2 protocol command handling. */
void V2Protocol_Init(void)
{
#if defined(ADC)
/* Initialize the ADC converter for VTARGET level detection on supported AVR models */
ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_128);
ADC_SetupChannel(VTARGET_ADC_CHANNEL);
ADC_StartReading(VTARGET_REF_MASK | ADC_RIGHT_ADJUSTED | VTARGET_ADC_CHANNEL_MASK);
#endif
V2Params_LoadNonVolatileParamValues();
#if defined(ENABLE_ISP_PROTOCOL)
ISPTarget_ConfigureRescueClock();
#endif
}
/** Shuts down the current selected SPI driver (hardware or software, depending on the selected ISP speed) so that no
* further communications can occur until the driver is re-initialized.
*/
void ISPTarget_DisableTargetISP(void)
{
if (HardwareSPIMode)
{
SPI_Disable();
}
else
{
DDRB &= ~((1 << 1) | (1 << 2));
PORTB &= ~((1 << 0) | (1 << 3));
/* Must re-enable rescue clock once software ISP has exited, as the timer for the rescue clock is
* re-purposed for software SPI */
ISPTarget_ConfigureRescueClock();
}
}
/** Initialises the hardware and software associated with the V2 protocol command handling. */
void V2Protocol_Init(void)
{
#if defined(ADC)
/* Initialize the ADC converter for VTARGET level detection on supported AVR models */
ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_128);
ADC_SetupChannel(VTARGET_ADC_CHANNEL);
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)
ISPTarget_ConfigureRescueClock();
#endif
}
/** Handler for the XPROG LEAVE_PROGMODE command to terminate the PDI programming connection with
* the attached device.
*/
static void XPROGProtocol_LeaveXPROGMode(void)
{
Endpoint_ClearOUT();
Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR);
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
if (XPROG_SelectedProtocol == XPROG_PROTOCOL_PDI)
XMEGANVM_DisablePDI();
else
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
Endpoint_Write_8(CMD_XPROG);
Endpoint_Write_8(XPROG_CMD_LEAVE_PROGMODE);
Endpoint_Write_8(XPROG_ERR_OK);
Endpoint_ClearIN();
}