github.com/antonblanchard.microwatt
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Add GPIOs

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This commit is contained in:
Anton Blanchard
2021-10-29 20:05:19 +11:00
parent 46a85cb274
commit 1383bbb8be
1 changed files with 15 additions and 1 deletions
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16
asic/top-asic.vhdl
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@@ -31,7 +31,9 @@ entity toplevel is
DCACHE_NUM_LINES : natural := 4;
DCACHE_NUM_WAYS : natural := 2;
DCACHE_TLB_SET_SIZE : natural := 2;
DCACHE_TLB_NUM_WAYS : natural := 2
DCACHE_TLB_NUM_WAYS : natural := 2;
HAS_GPIO : boolean := true;
NGPIO : natural := 32
);
port(
ext_clk : in std_ulogic;
@@ -59,6 +61,11 @@ entity toplevel is
jtag_trst : in std_ulogic;
jtag_tdo : out std_ulogic;
-- GPIO
gpio_in : in std_ulogic_vector(NGPIO - 1 downto 0);
gpio_out : out std_ulogic_vector(NGPIO - 1 downto 0);
gpio_dir : out std_ulogic_vector(NGPIO - 1 downto 0);
-- Add an I/O pin to select fetching from flash on reset
alt_reset : in std_ulogic
);
@@ -95,6 +102,8 @@ begin
UART0_IS_16550 => UART_IS_16550,
HAS_UART1 => HAS_UART1,
HAS_JTAG => HAS_JTAG,
HAS_GPIO => HAS_GPIO,
NGPIO => NGPIO,
ICACHE_NUM_LINES => ICACHE_NUM_LINES,
ICACHE_NUM_WAYS => ICACHE_NUM_WAYS,
ICACHE_TLB_SIZE => ICACHE_TLB_SIZE,
@@ -130,6 +139,11 @@ begin
jtag_trst => jtag_trst,
jtag_tdo => jtag_tdo,
-- GPIO signals
gpio_in => gpio_in,
gpio_out => gpio_out,
gpio_dir => gpio_dir,
-- Reset PC to flash offset 0 (ie 0xf000000)
alt_reset => alt_reset
);