Changes to interrupt blocking, etc for PR change

[pub/USBasp.git] / Projects / AVRISP-MKII / Lib / ISP / ISPProtocol.c

diff --git a/Projects/AVRISP-MKII/Lib/ISP/ISPProtocol.c b/Projects/AVRISP-MKII/Lib/ISP/ISPProtocol.c
index 4dc37a4..ffe2c56 100644 (file)
--- a/Projects/AVRISP-MKII/Lib/ISP/ISPProtocol.c
+++ b/Projects/AVRISP-MKII/Lib/ISP/ISPProtocol.c
@@ -36,6 +36,7 @@
  */
 
 #include "ISPProtocol.h"
  */
 
 #include "ISPProtocol.h"

+#include <util/atomic.h>

 
 #if defined(ENABLE_ISP_PROTOCOL) || defined(__DOXYGEN__)
 
 
 #if defined(ENABLE_ISP_PROTOCOL) || defined(__DOXYGEN__)
 


@@ -395,14 +396,14 @@ volatile uint16_t HalfCyclesRemaining;
 volatile uint8_t  ResponseTogglesRemaining;
 
 /** ISR to toggle MOSI pin when TIMER1 overflows */
 volatile uint8_t  ResponseTogglesRemaining;
 
 /** ISR to toggle MOSI pin when TIMER1 overflows */

-ISR(TIMER1_OVF_vect)
+ISR(TIMER1_OVF_vect, ISR_BLOCK)

 {
        PINB |= (1 << PB2);     // toggle PB2 (MOSI) by writing 1 to its bit in PINB
        HalfCyclesRemaining--;
 }
 
 /** ISR to listen for toggles on MISO pin */
 {
        PINB |= (1 << PB2);     // toggle PB2 (MOSI) by writing 1 to its bit in PINB
        HalfCyclesRemaining--;
 }
 
 /** ISR to listen for toggles on MISO pin */

-ISR(PCINT0_vect)
+ISR(PCINT0_vect, ISR_BLOCK)

 {
        ResponseTogglesRemaining--;
 }
 {
        ResponseTogglesRemaining--;
 }


@@ -444,22 +445,23 @@ void ISPProtocol_Calibrate(void)
        ResponseTogglesRemaining        = SUCCESS_TOGGLE_NUM;
 
        /* Turn on interrupts */
        ResponseTogglesRemaining        = SUCCESS_TOGGLE_NUM;
 
        /* Turn on interrupts */

-       uint8_t OldSREG = SREG; // save current global interrupt state

        PCICR  |= (1 << PCIE0); // enable interrupts for PCINT7:0 (don't touch setting for PCINT12:8)
        TIMSK1  = (1 << TOIE1); // enable T1 OVF interrupt (and no other T1 interrupts)
        PCICR  |= (1 << PCIE0); // enable interrupts for PCINT7:0 (don't touch setting for PCINT12:8)
        TIMSK1  = (1 << TOIE1); // enable T1 OVF interrupt (and no other T1 interrupts)

-       sei();                                  // enable global interrupts
-
-       /* Let device do its calibration, wait for reponse on MISO */
-       while ( HalfCyclesRemaining && ResponseTogglesRemaining )
+       
+       /* Turn on global interrupts for the following block, restoring current state at end */
+       NONATOMIC_BLOCK(NONATOMIC_RESTORESTATE)

        {
        {

-               // do nothing...
+               /* Let device do its calibration, wait for reponse on MISO */
+               while ( HalfCyclesRemaining && ResponseTogglesRemaining )
+               {
+                       // do nothing...
+               }
+               
+               /* Disable interrupts */
+               PCICR  &= ~(1 << PCIE0);
+               TIMSK1  = 0;

        }
        
        }
        

-       /* Disable interrupts, restore SREG */
-       PCICR  &= ~(1 << PCIE0);
-       TIMSK1  = 0;
-       SREG    = OldSREG;
-       

        /* Check if device responded with a success message or if we timed out */
        if (ResponseTogglesRemaining)
        {
        /* Check if device responded with a success message or if we timed out */
        if (ResponseTogglesRemaining)
        {