diff options
Diffstat (limited to 'Projects/AVRISP-MKII/Lib/ISP/ISPProtocol.c')
| -rw-r--r-- | Projects/AVRISP-MKII/Lib/ISP/ISPProtocol.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Projects/AVRISP-MKII/Lib/ISP/ISPProtocol.c b/Projects/AVRISP-MKII/Lib/ISP/ISPProtocol.c index 33ccbf91e..e0eb44107 100644 --- a/Projects/AVRISP-MKII/Lib/ISP/ISPProtocol.c +++ b/Projects/AVRISP-MKII/Lib/ISP/ISPProtocol.c @@ -62,7 +62,14 @@ void ISPProtocol_EnterISPMode(void) uint8_t ResponseStatus = STATUS_CMD_FAILED;
CurrentAddress = 0;
+
+ /* Set up the synchronous USART to generate the recovery clock on XCK pin */
+ UBRR1 = (F_CPU / 500000UL);
+ UCSR1B = (1 << TXEN1);
+ UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1);
+ DDRD |= (1 << 5);
+ /* Perform execution delay, initialize SPI bus */
ISPProtocol_DelayMS(Enter_ISP_Params.ExecutionDelayMS);
SPI_Init(ISPTarget_GetSPIPrescalerMask() | SPI_SCK_LEAD_RISING | SPI_SAMPLE_LEADING | SPI_MODE_MASTER);
@@ -118,6 +125,12 @@ void ISPProtocol_LeaveISPMode(void) SPI_ShutDown();
ISPProtocol_DelayMS(Leave_ISP_Params.PostDelayMS);
+ /* Turn off the synchronous USART to terminate the recovery clock on XCK pin */
+ UBRR1 = (F_CPU / 500000UL);
+ UCSR1B = (1 << TXEN1);
+ UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1);
+ DDRD &= ~(1 << 5);
+
Endpoint_Write_Byte(CMD_LEAVE_PROGMODE_ISP);
Endpoint_Write_Byte(STATUS_CMD_OK);
Endpoint_ClearIN();
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