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[/] [cpu_lecture/] [trunk/] [src/] [io.vhd] - Diff between revs 2 and 22
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| Rev 2 |
Rev 22 |
| Line 142... |
Line 142... |
if (I_CLR = '1') then
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if (I_CLR = '1') then
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L_RX_INT_ENABLED <= '0';
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L_RX_INT_ENABLED <= '0';
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L_TX_INT_ENABLED <= '0';
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L_TX_INT_ENABLED <= '0';
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elsif (I_WE_IO = '1') then
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elsif (I_WE_IO = '1') then
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case I_ADR_IO is
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case I_ADR_IO is
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when X"38" => Q_7_SEGMENT <= I_DIN(6 downto 0); -- PORTB
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when X"38" => -- PORTB
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Q_7_SEGMENT <= I_DIN(6 downto 0);
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L_LEDS <= not L_LEDS;
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L_LEDS <= not L_LEDS;
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when X"40" => -- handled by uart
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when X"2A" => -- UCSRB
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when X"41" => -- handled by uart
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L_RX_INT_ENABLED <= I_DIN(7);
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when X"43" => L_RX_INT_ENABLED <= I_DIN(0);
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L_TX_INT_ENABLED <= I_DIN(6);
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L_TX_INT_ENABLED <= I_DIN(1);
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when X"2B" => -- UCSRA: handled by uart
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when X"2C" => -- UDR: handled by uart
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when X"40" => -- UCSRC/UBRRH: (ignored)
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when others =>
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when others =>
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end case;
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end case;
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end if;
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end if;
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end if;
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end if;
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end process;
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end process;
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