diff options
Diffstat (limited to 'lmx2487lib.lua')
| -rw-r--r-- | lmx2487lib.lua | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/lmx2487lib.lua b/lmx2487lib.lua index b115d4e..c01da6e 100644 --- a/lmx2487lib.lua +++ b/lmx2487lib.lua @@ -62,3 +62,86 @@ function set_lmx2487_board_to_default_state() update_lmx2487state() end + +-- bits in mask counted starting from position 1, +-- i.e. 1 sets bit in 1st pos, 2 sets bit in 2nd pos +mask_bits14to24=bit.lshift( bit.bit(11)-1, 13) +mask_bits2to13=bit.lshift( bit.bit(12)-1, 1) +mask_bits5to16=bit.lshift( bit.bit(12)-1, 4) +mask_bits5to14=bit.lshift( bit.bit(10)-1, 4) +mask_bits15to24=bit.lshift( bit.bit(10)-1, 14) +mask_bits5to24=bit.bor(mask_bits5to14, mask_bits15to24) +mask_low12bits = bit.bit(12)-1 +mask_bits13andAbove = bit.bnot(mask_low12bits) + +function FreqToSettingsBin(freq) + local freq, RF_N, RF_FN, RF_FD = freq2regestersValues(freq) + R0_new=get_lmx2487register(0) + R1_new=get_lmx2487register(1) + R5_new=get_lmx2487register(5) + + -- this code is extremely convoluted refer to the lmx2487 manual + -- to see what bits are used in what place in a register. + -- But I show in comments obsolete but human readable notation: + -- tableReplace( Rn, bitSlice(..), stPos, endPos) + + -- settings["R0"]=tableReplace(settings["R0"], bRF_N, 14, 24) + bitsRF_N = bit.lshift(RF_N, 13) + R0_new = bit.band(R0_new, bit.bnot(mask_bits14to24)) + R0_new = bit.bor(R0_new, bitsRF_N) + + -- settings["R0"]=tableReplace(settings["R0"], bitSlice(bRF_FN, 1, 12), 2, 13) + bitsRF_FN_low = bit.band( RF_FN, mask_low12bits) + R0_new = bit.band(R0_new, bit.bnot(mask_bits2to13)) + R0_new = bit.bor(R0_new, bit.lshift(bitsRF_FN_low,1)) + + -- settings["R1"]=tableReplace(settings["R1"], bitSlice(bRF_FD, 1, 12), 5, 16) + bitsRF_FD_low = bit.band( RF_FD, mask_low12bits) + R1_new = bit.band(R1_new, bit.bnot(mask_bits5to16)) + R1_new = bit.bor(R1_new, bit.lshift(bitsRF_FD_low,4)) + + -- settings["R5"]=tableReplace(settings["R5"], bitSlice(bRF_FN, 13, 22), 5, 14) + -- settings["R5"]=tableReplace(settings["R5"], bitSlice(bRF_FD, 13, 22), 15, 24) + RF_FN_above_12 = bit.band( RF_FN, mask_bits13andAbove) + RF_FN_part = bit.rshift(RF_FN_above_12, 12) + RF_FD_above_12 = bit.band( RF_FD, mask_bits13andAbove) + RF_FD_above_12 = bit.rshift( RF_FD_above_12, 2) + new_bits = bit.bor(RF_FN_part, RF_FD_above_12) + R5_new = bit.band(R5_new, bit.bnot(mask_bits5to24)) + R5_new = bit.bor(R5_new, bit.lshift(new_bits,4)) + + set_lmx2487register(R0_new, 0) + set_lmx2487register(R1_new, 1) + set_lmx2487register(R5_new, 5) +end + +-- test setFreq +set_lmx2487_board_to_default_state() +FreqToSettingsBin(6.834e9) +if + get_lmx2487register(0) ~= 11192320 + and get_lmx2487register(1) ~= 4362243 + and get_lmx2487register(2) ~= 8560613 -- should not change + and get_lmx2487register(5) ~= 16003291 +then + print("ERROR in setFreq: registers do not match") +end +FreqToSettingsBin(6.8204e9) +if + get_lmx2487register(0) ~= 11174912 + and get_lmx2487register(1) ~= 4362243 -- should not change + and get_lmx2487register(2) ~= 8560613 -- should not change + and get_lmx2487register(5) ~= 15992043 +then + print("ERROR in setFreq: registers do not match") +end +FreqToSettingsBin(6.8346e9) +if + get_lmx2487register(0) ~= 11193856 + and get_lmx2487register(1) ~= 4362243 -- should not change + and get_lmx2487register(2) ~= 8560613 -- should not change + and get_lmx2487register(5) ~= 16005163 +then + print("ERROR in setFreq: registers do not match") +end + |