uzix/zx-sizif-128
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chroma_gen: handle new clock frequencies

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28.375 MHz (best result, recommended to use instead of 16 MHz)
28.63636 MHz
35.46895 MHz
This commit is contained in:
UzixLS
2021-03-18 21:40:53 +03:00
parent b156edf271
commit 209a1b5e16
1 changed files with 9 additions and 0 deletions
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9
cpld/chroma_gen.v
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@ -20,7 +20,10 @@ localparam CARRIER_WIDTH =
(CLK_FREQ == 24_000_000)? 17 :
(CLK_FREQ == 25_000_000)? 16 :
(CLK_FREQ == 28_000_000)? 18 :
(CLK_FREQ == 28_375_000)? 16 :
(CLK_FREQ == 28_636_360)? 18 :
(CLK_FREQ == 32_000_000)? 15 :
(CLK_FREQ == 35_468_950)? 3 :
(CLK_FREQ == 40_000_000)? 15 :
0;
localparam PAL_CARRIER =
@ -32,7 +35,10 @@ localparam PAL_CARRIER =
(CLK_FREQ == 24_000_000)? 48427 : // 5.51 error
(CLK_FREQ == 25_000_000)? 23245 : // 13.14 error
(CLK_FREQ == 28_000_000)? 83018 : // 20.78 error
(CLK_FREQ == 28_375_000)? 20480 : // 25 error
(CLK_FREQ == 28_636_360)? 81173 : // 11.76 error
(CLK_FREQ == 32_000_000)? 9080 : // 25 error
(CLK_FREQ == 35_468_950)? 2 : // 0 error
(CLK_FREQ == 40_000_000)? 7264 : // 25 error
0;
localparam NTSC_CARRIER =
@ -44,7 +50,10 @@ localparam NTSC_CARRIER =
(CLK_FREQ == 24_000_000)? 39098 : // 16.19 error
(CLK_FREQ == 25_000_000)? 18767 : // 23.82 error
(CLK_FREQ == 28_000_000)? 67025 : // 23.82 error
(CLK_FREQ == 28_375_000)? 16535 : // 19.1 error
(CLK_FREQ == 28_636_360)? 65536 : // 0 error
(CLK_FREQ == 32_000_000)? 7331 : // 44.84 error
(CLK_FREQ == 35_468_950)? 2 : // 0 error (NTSC4.43)
(CLK_FREQ == 40_000_000)? 5865 : // 166.91 error
0;