[Keyboard] Eagle/Viper V2 Cleanups (#5709)
* cleanup matrix of unused row and column, and add more documentation * update matrix notes * update readmes * update readmes * fix comments E2 to E3
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					 3 changed files with 31 additions and 37 deletions
				
			
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			@ -2,10 +2,6 @@
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Non official firmware for custom Korean keyboard with 60% key layout made by Duck.
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See [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) then the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information.
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Newest version is the [Eagle/Viper V2](http://duck0113.tistory.com/127)
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Make example for this keyboard (after setting up your build environment):
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    make duck/eagle_viper/v2:default
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See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
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			@ -123,31 +123,27 @@ void matrix_print(void) {
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  }
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}
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/* Row pin configuration
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 * row: 0    1    2    3    4    5
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 * pin: PB7  PD0  PD1  PD2  PD3  PD5
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/* Row pin configuration - diode connected
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 * row: 0    1    2    3    4
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 * pin: PD0  PD1  PD2  PD3  PD5
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 *
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 * Esc uses its own pin PE2
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 * Caps Lock uses its own pin PE2 on the column pin, row pin is grounded
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 */
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static void init_rows(void) {
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    DDRD  &= ~0b00101111;
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    PORTD &= ~0b00101111;
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    DDRB  &= ~0b10000000;
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    PORTB &= ~0b10000000;
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    DDRE  &= ~0b00000100;
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    PORTE |=  0b00000100;
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}
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static uint8_t read_rows(uint8_t col) {
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    return (PIND&(1<<0) ? (1<<0) : 0) |
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    return (PIND&(1<<0) ? (1<<0) : 0)  |
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            (PIND&(1<<1) ? (1<<1) : 0) |
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            (PIND&(1<<2) ? (1<<2) : 0) |
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            (PIND&(1<<3) ? (1<<3) : 0) |
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            (PIND&(1<<5) ? (1<<4) : 0) |
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            (PINB&(1<<7) ? (1<<5) : 0) |
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            (col==0 ? ((PINE&(1<<2) ? 0 : (1<<2))) : 0);
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}
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			@ -158,24 +154,31 @@ uint8_t read_fwkey(void)
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}
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/* Columns 0 - 15
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 *
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 * atmega32u4   decoder    pin
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 *    PC6       U1         E3
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 *    PB6       U2         E3    
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 *    PF0       U1, U2     A0
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 *    PF1       U1, U2     A1
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 *    PC7       U1, U2     A2
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 * 
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 * These columns uses two 74HC237D 3 to 8 bit demultiplexers.
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 * col / pin:    PC6  PB6  PF0  PF1  PC7
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 * 0:             1    0    0    0    0
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 * 1:             1    0    1    0    0
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 * 2:             1    0    0    1    0
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 * 3:             1    0    1    1    0
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 * 4:             1    0    0    0    1
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 * 5:             1    0    1    0    1
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 * 6:             1    0    0    1    1
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 * 7:             1    0    1    1    1
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 * 8:             0    1    0    0    0
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 * 9:             0    1    1    0    0
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 * 10:            0    1    0    1    0
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 * 11:            0    1    1    1    0
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 * 12:            0    1    0    0    1
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 * 13:            0    1    1    0    1
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 * 14:            0    1    0    1    1
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 * 15:            0    1    1    1    1
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 * col / pin:    PC6  PB6  PF0  PF1  PC7 Decoder  Pin
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 * 0:             1    0    0    0    0    U1     Y0
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 * 1:             1    0    1    0    0    U1     Y1
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 * 2:             1    0    0    1    0    U1     Y2
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 * 3:             1    0    1    1    0    U1     Y3
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 * 4:             1    0    0    0    1    U1     Y4
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 * 5:             1    0    1    0    1    U1     Y5
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 * 6:             1    0    0    1    1    U1     Y6
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 * 7:             1    0    1    1    1    U1     Y7
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 * 8:             0    1    0    0    0    U2     Y0
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 * 9:             0    1    1    0    0    U2     Y1
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 * 10:            0    1    0    1    0    U2     Y2
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 * 11:            0    1    1    1    0    U2     Y3
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 * 12:            0    1    0    0    1    U2     Y4
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 * 13:            0    1    1    0    1    U2     Y5
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 * 14:            0    1    0    1    1    U2     Y6
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 *
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 */
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static void unselect_cols(void) {
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			@ -251,10 +254,5 @@ static void select_col(uint8_t col) {
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            PORTF |= 0b00000010;
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            PORTC |= 0b10000000;
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            break;
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        case 15:
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            PORTB |= 0b01000000;
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            PORTF |= 0b00000011;
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            PORTC |= 0b10000000;
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            break;
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    }
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}
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			@ -13,7 +13,7 @@ Make example for this keyboard (after setting up your build environment):
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**Reset Key:** To put the Eagle/Viper V2 into reset, hold caps lock key (`K2A`) while plugging in. 
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See [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) then the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information.
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See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
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## Hardware Notes
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