I put two slaves on system AHB bus , one is leds the other is switch .
I can write date to the leds\' register to control the led on or off, but I can\'t read date from the switch data register .
i don\'t know what\'s wrong
here is the slave\'s code
//Transfer Response
assign HREADYOUT = 1\'b1; //Single cycle Write & Read. Zero Wait state operations
//read
always @(*)
begin
if( rHADDR==(`SWITCH_BASE ))
HRDATA <= {22\'h0000_00,rSW};
end |
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