picoblaze_utils

picoblaze c-compiler and assembly and linker writing in python.

This is easy assembly like c style, not really c!

You can use macro, this python depend on mcpp(preprocessor) and astyle(style formater).

mcpp: http://mcpp.sourceforge.net/

astyle: http://astyle.sourceforge.net/

#define r_io s0
bool_t isr_test(void) __attribute__((interrupt ("IRQ0")));

bool_t isr_test(void)
{
    r_io = 0x00;
    output(0xFF, &r_io);
    return true;
}

void init(void)
{
    while (s0 == s0) {
        s0 = s0;
    }
}

pblaze-cc.py will generate this assembly.

;------------------------------------------------------------
address 0x000
boot:
  call init
loop:
  jump loop

;------------------------------------------------------------
;D:/Work/Checkout.Git/picoblaze_utils/test.c
init:
 L_f512cca69f269d9d7abd0a0f2e96a5f4_0:
 ;D:/Work/Checkout.Git/picoblaze_utils/test.c:12
  ;void init (void)

 L_f512cca69f269d9d7abd0a0f2e96a5f4_1:
 ;D:/Work/Checkout.Git/picoblaze_utils/test.c:14
    ;while (s0 == s0), L_f512cca69f269d9d7abd0a0f2e96a5f4_2, JOIN_0
    compare s0, s0
    jump NZ, JOIN_0

 L_f512cca69f269d9d7abd0a0f2e96a5f4_2:
 ;D:/Work/Checkout.Git/picoblaze_utils/test.c:15
        move s0, s0

 JOIN_2:
 ;D:/Work/Checkout.Git/picoblaze_utils/test.c:14
    ;endwhile
    jump L_f512cca69f269d9d7abd0a0f2e96a5f4_1

 JOIN_0:
 ;D:/Work/Checkout.Git/picoblaze_utils/test.c:12
  ;endfunc

_end_init:
  return


;------------------------------------------------------------
;D:/Work/Checkout.Git/picoblaze_utils/test.c
isr_test:
 L_f512cca69f269d9d7abd0a0f2e96a5f4_3:
 ;D:/Work/Checkout.Git/picoblaze_utils/test.c:5
  ;bool_t isr_test (void)

 L_f512cca69f269d9d7abd0a0f2e96a5f4_4:
 ;D:/Work/Checkout.Git/picoblaze_utils/test.c:7
    move s0, 0
 ;D:/Work/Checkout.Git/picoblaze_utils/test.c:8
    output s0, 255
 ;D:/Work/Checkout.Git/picoblaze_utils/test.c:9
    returni enable

 JOIN_1:
 ;D:/Work/Checkout.Git/picoblaze_utils/test.c:5
  ;endfunc

_end_isr_test:
  returni enable



;ISR
address 0x3F0
jump    isr_test

pblaze-as.py will convert to obj.

{
    "labels": {
        "L_f512cca69f269d9d7abd0a0f2e96a5f4_1": 2, 
        "L_f512cca69f269d9d7abd0a0f2e96a5f4_0": 2, 
        "_end_init": 6, 
        "L_f512cca69f269d9d7abd0a0f2e96a5f4_2": 4, 
        "isr_test": 7, 
        "JOIN_2": 5, 
        "JOIN_1": 10, 
        "JOIN_0": 6, 
        "boot": 0, 
        "L_f512cca69f269d9d7abd0a0f2e96a5f4_3": 7, 
        "init": 2, 
        "_end_isr_test": 10, 
        "loop": 1, 
        "L_f512cca69f269d9d7abd0a0f2e96a5f4_4": 7
    }, 
    "ctime": "Thu Jul 11 00:01:32 2013", 
    "object": [
        196610, 
        212993, 
        86016, 
        218118, 
        4096, 
        212994, 
        172032, 
        0, 
        180479, 
        229377, 
        229377, 
        0, 
        "......",
        0, 
        212999
    ], 
    "mtime": "Thu Jul 11 00:01:32 2013"
}

then pblaze-ld.py convert to verilog.

/*
 * source : test.s
 * create : Thu Jul 11 00:01:32 2013
 * modify : Thu Jul 11 00:01:32 2013
 */
`timescale 1 ps / 1ps
module test (address, instruction, clk);
input [9:0] address;
input clk;
output [17:0] instruction;

RAMB16_S18 #(
    .INIT(18'h00000),

    // The following INIT_xx declarations specify the initial contents of the RAM
    // Address 0 to 255
    .INIT_00(256'h0000000000000000000080018001C0FF0000A000400210005406500040010002),
    .INIT_01(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_02(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_03(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_04(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_05(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_06(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_07(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_08(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_09(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_0A(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_0B(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_0C(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_0D(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_0E(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_0F(256'h0000000000000000000000000000000000000000000000000000000000000000),

    // Address 256 to 511
    .INIT_10(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_11(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_12(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_13(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_14(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_15(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_16(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_17(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_18(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_19(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_1A(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_1B(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_1C(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_1D(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_1E(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_1F(256'h0000000000000000000000000000000000000000000000000000000000000000),

    // Address 512 to 767
    .INIT_20(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_21(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_22(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_23(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_24(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_25(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_26(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_27(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_28(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_29(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_2A(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_2B(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_2C(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_2D(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_2E(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_2F(256'h0000000000000000000000000000000000000000000000000000000000000000),

    // Address 768 to 1023
    .INIT_30(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_31(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_32(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_33(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_34(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_35(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_36(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_37(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_38(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_39(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_3A(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_3B(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_3C(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_3D(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_3E(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INIT_3F(256'h0000000000000000000000000000000000000000000000000000000000004007),

    // The next set of INITP_xx are for the parity bits
    // Address 0 to 255
    .INITP_00(256'h00000000000000000000000000000000000000000000000000000000003E2CDF),
    .INITP_01(256'h0000000000000000000000000000000000000000000000000000000000000000),

    // Address 256 to 511
    .INITP_02(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INITP_03(256'h0000000000000000000000000000000000000000000000000000000000000000),

    // Address 512 to 767
    .INITP_04(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INITP_05(256'h0000000000000000000000000000000000000000000000000000000000000000),

    // Address 768 to 1023
    .INITP_06(256'h0000000000000000000000000000000000000000000000000000000000000000),
    .INITP_07(256'h0000000300000000000000000000000000000000000000000000000000000000),

    // Output value upon SSR assertion
    .SRVAL(18'h000000),
    .WRITE_MODE("WRITE_FIRST")
) ram_1024_x_18(
    .DI  (16'h0000),
    .DIP  (2'b00),
    .EN (1'b1),
    .WE (1'b0),
    .SSR (1'b0),
    .CLK (clk),
    .ADDR (address),
    .DO (instruction[15:0]),
    .DOP (instruction[17:16])
);

endmodule

I am still learning llvm, so this tools maybe rewrite to llvm later.