33 lines
1.2 KiB
Coq
33 lines
1.2 KiB
Coq
|
/*
|
||
|
|
* LCD communicates with ILI9341V LCD controller over 4 wire SPI.
|
||
|
|
*
|
||
|
|
* When load=1 and in[8]=0 transmission of byte in[7:0] is initiated.
|
||
|
|
* CSX is goes low (and stays low even when transmission is completed).
|
||
|
|
* DCX is set to in[9]. The byte in[7:0] is send to SDO bitwise together
|
||
|
|
* with 8 clock signals on SCK. During transmission out[15] is 1.
|
||
|
|
* After 16 clock cycles transmission is completed and out[15] is set to 0.
|
||
|
|
*
|
||
|
|
* When load=1 and in[8]=1 CSX goes high and DCX=in[9] without transmission
|
||
|
|
* of any bit.
|
||
|
|
*
|
||
|
|
* When load16=1 transmission of word in[15:0] is initiated. CSX is goes low
|
||
|
|
* (and stays low even when transmission is completed). DCX is set to 1 (data).
|
||
|
|
* After 32 clock cycles transmission is completed and out[15] is set to 0.
|
||
|
|
*/
|
||
|
|
`default_nettype none
|
||
|
|
module LCD(
|
||
|
|
input clk, //clock 25 MHz
|
||
|
|
input load, //start send command/byte over SPI
|
||
|
|
input load16, //start send data (16 bits)
|
||
|
|
input [15:0] in, //data to be send
|
||
|
|
output [15:0] out, //data to be send
|
||
|
|
output DCX, //SPI data/command not
|
||
|
|
output CSX, //SPI chip select not
|
||
|
|
output SDO, //SPI serial data out
|
||
|
|
output SCK //SPI serial clock
|
||
|
|
);
|
||
|
|
|
||
|
|
// Put your code here:
|
||
|
|
|
||
|
|
endmodule
|