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| author | Jenna Fox <a@creativepony.com> | 2012-09-26 13:03:53 +1000 |
|---|---|---|
| committer | Jenna Fox <a@creativepony.com> | 2012-09-26 13:03:53 +1000 |
| commit | 8a578076dbb542a0e1218e93a2ae1cfa735ef964 (patch) | |
| tree | 36f00cac6d5a18b95d4f53379dfc62b8c629a307 /firmware/main.c | |
| parent | de19ff10edcb97d9b3b453516bd5975f62db449b (diff) | |
| download | micronucleus-8a578076dbb542a0e1218e93a2ae1cfa735ef964.tar.gz micronucleus-8a578076dbb542a0e1218e93a2ae1cfa735ef964.tar.bz2 micronucleus-8a578076dbb542a0e1218e93a2ae1cfa735ef964.zip | |
Adding more comments mostly - no functional changes
Diffstat (limited to 'firmware/main.c')
| -rw-r--r-- | firmware/main.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/firmware/main.c b/firmware/main.c index 7476254..2f9444f 100644 --- a/firmware/main.c +++ b/firmware/main.c @@ -163,11 +163,14 @@ static void writeFlashPage(void) { // write a word in to the page buffer, doing interrupt table modifications where they're required static void writeWordToPageBuffer(uint16_t data) { - // first two interrupt vectors get replaced with a jump to the bootloader vector table + // first two interrupt vectors get replaced with a jump to the bootloader's vector table if (currentAddress == (RESET_VECTOR_OFFSET * 2) || currentAddress == (USBPLUS_VECTOR_OFFSET * 2)) { data = 0xC000 + (BOOTLOADER_ADDRESS/2) - 1; } - + + // at end of page just before bootloader, write in tinyVector table + // see http://embedded-creations.com/projects/attiny85-usb-bootloader-overview/avr-jtag-programmer/ + // for info on how the tiny vector table works if (currentAddress == BOOTLOADER_ADDRESS - TINYVECTOR_RESET_OFFSET) { data = vectorTemp[0] + ((FLASHEND + 1) - BOOTLOADER_ADDRESS)/2 + 2 + RESET_VECTOR_OFFSET; } |