add some information into spminterface regarding the do_spm

[pub/USBaspLoader.git] / firmware / spminterface.h

diff --git a/firmware/spminterface.h b/firmware/spminterface.h
index 4fd6249..da46501 100644 (file)
--- a/firmware/spminterface.h
+++ b/firmware/spminterface.h
@@ -105,6 +105,11 @@ ret
  * Call the "bootloader__do_spm"-function, located within the BLS via comfortable C-interface
  * During operation code will block - disable or reset watchdog before call.
  * 
+ * ATTANTION:  Since the underlying "bootloader__do_spm" will automatically reenable the
+ *             rww-section, only one way to program the flash will work.
+ *             (First erase the page, then fill temp. buffer, finally program...)
+ *             Since unblocking rww-section erases the temp. pagebuffer (which happens
+ *             after a page-erase), first programming this buffer does not help !!
  * 
  * REMEMBER: interrupts have to be disabled! (otherwise code may crash non-deterministic)
  *