Hi all, Could someone please explain what the purpose is of 'asm bank RTCCFG' and why it is required? My assumption (until now) was that JAL handles all banking as long as you don't use assembler.
Joep 2010/7/27 vasile surducan <[email protected]>: > > Two different procedures with the same result: > A: > -- ---------------------------------------------------------------------- > -- Enable RTCC register writes > -- input: bit (enable / disable) > -- output: none > -- returns: nothing > -- notes: Setting the RTCWREN bit in RTCCFG requires a strict > -- sequence, some assembly language need to be used. > -- ---------------------------------------------------------------------- > procedure _rtc_write_control(bit in control) is > asm bank RTCCFG -- set bank of RTCCFG > if (control == enabled) then > EECON2 = 0x55 -- ) write .. > EECON2 = 0xAA -- ) .. enable > RTCCFG_RTCWREN = enabled -- allow writes > else > EECON2 = 0x55 -- ) write .. > EECON2 = 0xAA -- ) .. enable > RTCCFG_RTCWREN = disabled -- deny writes > end if > end procedure > > B: > -- ---------------------------------------------------------------------- > -- Enable RTCC register writes > -- input: bit (RTC_enabled / RTC_disabled) > -- ---------------------------------------------------------------------- > const bit RTC_enabled = 1 > const bit RTC_disabled = 0 > procedure RTC_writing (bit in value) is > asm bank RTCCFG ; identical with RTCCFG_RTCWREN = value used only to set > bank 15 > EECON2 = 0x55 -- \ required sequence > EECON2 = 0xAA -- / > RTCCFG_RTCWREN = value ; enable/disable writting to RTCCFG > end procedure > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/jallib?hl=en. > -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
