Below are code：
CFM1 : CFM
port map(
clock => ssClk,
reset_n => ssRst,
avmm_data_addr => slv17avmm_data_addr,
avmm_data_read => slavmm_data_read,
avmm_data_writedata => slv32avmm_data_writedata,
avmm_data_write => slavmm_data_write,
avmm_data_readdata => slv32avmm_data_readdata,
avmm_data_waitrequest => slavmm_data_waitrequest,
avmm_data_readdatavalid => slavmm_data_readdatavalid,
avmm_data_burstcount => B"01",
avmm_csr_addr => slavmm_csr_addr,
avmm_csr_read => slavmm_csr_read,
avmm_csr_writedata => slv32avmm_csr_writedata,
avmm_csr_write => slavmm_csr_write,
avmm_csr_readdata => slv32avmm_csr_readdata
);
FlashErase : process( ssClk )
begin
if rising_edge( ssClk ) then
slv32MSG_ID_Old <= slv32MSG_ID;
case stFlashEraseState is
when ST_ERASE_IDLE =>
slEraseOK <= '0';
if slv32MSG_ID = X"00001000" and slv32MSG_ID_Old /= X"00001000" then
stFlashEraseState <= ST_ERASE_UNPROTECT;
slavmm_csr_write <= '1';
slavmm_csr_addr <= '1';
slv32avmm_csr_writedata <= X"F7FFFFFF";
end if;
when ST_ERASE_UNPROTECT =>
stFlashEraseState <= ST_ERASE_START;
slavmm_csr_write <= '1';
slavmm_csr_addr <= '1';
slv32avmm_csr_writedata <= X"F7FFFFFF";
when ST_ERASE_START =>
stFlashEraseState <= ST_ERASE_WAIT;
slavmm_csr_write <= '1';
slavmm_csr_addr <= '1';
slv32avmm_csr_writedata <= X"F7DFFFFF";
when ST_ERASE_WAIT =>
stFlashEraseState <= ST_ERASE_WAIT;
slavmm_csr_write <= '0';
slavmm_csr_read <= '1';
slavmm_csr_addr <= '0';
if slv32avmm_csr_readdata(1 downto 0) = B"00" and slv32avmm_csr_readdata(3) = '1' then
stFlashEraseState <= ST_ERASE_IDLE;
slavmm_csr_read <= '0';
slavmm_csr_write <= '1';
slavmm_csr_addr <= '1';
slv32avmm_csr_writedata <= X"FFFFFFFF";
slEraseOK <= '1';
end if;
when others =>
null;
end case;
end if;
end process FlashErase;
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