Ensure part is active first for defined start of ISP programming

MCUdude · MCUdude · commit 2f610073900b · 2025-05-02T23:30:01.000+02:00
... by pulling the reset line high before starting the programming session
diff --git a/src/bitbang.c b/src/bitbang.c
@@ -512,6 +512,9 @@ int bitbang_initialize(const PROGRAMMER *pgm, const AVRPART *p) {
       return -1;
     }
   } else {
+    // Ensure part is active first for defined start of ISP programming
+    pgm->setpin(pgm, PIN_AVR_RESET, 1);
+    usleep(128000);
     pgm->highpulsepin(pgm, PIN_AVR_RESET);
   }
 

Original file line number	Diff line number	Diff line change
`@@ -512,6 +512,9 @@ int bitbang_initialize(const PROGRAMMER pgm, const AVRPART p) {`
`512`	`512`	`return -1;`
`513`	`513`	`}`
`514`	`514`	`} else {`
	`515`	`+ // Ensure part is active first for defined start of ISP programming`
	`516`	`+ pgm->setpin(pgm, PIN_AVR_RESET, 1);`
	`517`	`+ usleep(128000);`
`515`	`518`	`pgm->highpulsepin(pgm, PIN_AVR_RESET);`
`516`	`519`	`}`
`517`	`520`