diff options
Diffstat (limited to 'downloader/proto.txt')
| -rw-r--r-- | downloader/proto.txt | 20 |
1 files changed, 6 insertions, 14 deletions
diff --git a/downloader/proto.txt b/downloader/proto.txt index af32584..15caec7 100644 --- a/downloader/proto.txt +++ b/downloader/proto.txt @@ -43,36 +43,28 @@ identify: 1 | len=3 | <csum> answer: - 1 | len=22 | <ret> | version | userid | devid | fs | fss | es | mess | supported | <csum> + 1 | len=22 | <ret> | version | name | devid | fss | mess | supported | <csum> version: 2bytes, protocol version It is an error if the major version (MSB) is different (hence any protocol update must change the major version of the bootloader). - userid: - 2bytes, an id which determines the exact device - The downloader has to compare this with the device id supplied + name: + 3bytes, a descriptive name of the device. + The downloader has to compare this name with the device name supplied via commandline and stop in case they don't match devid: 2bytes, device id of the PIC The downlaoder may use this id to check if it talks to the right bootloader - fs: - 2bytes, flash size - The size of the flash in code words. - fss: 1byte, flash segment size The number of words of one flash segment which has to be written at once. If less than <fss> should be updated the downloader has to perform a read operation first. - es: - 2bytes, eeprom size - The size of the eeprom in bytes. - mess: 1byte, maximum eeprom segment size This represents the maximum number of eeprom bytes which may be written or @@ -165,12 +157,12 @@ write eeprom: ~~~~~~~~~~~~~ command: - 7 | len=4+len(data) | addr | data | <csum> + 7 | len=4+2<len(data) | addr | data | <csum> answer: 7 | len=4 | <ret> | <csum> - The bootloader writes <data> (which has to contain exactly <len>-4 bytes) to address + The bootloader writes <data> (which has to contain exactly <len> bytes) to address <addr> inside the eeprom. len is 1byte long and the value must not exceed <mess> bytes. |