uartint.s: testprogramm fuers proggen

[calu.git] / 3_test / uartint.s

diff --git a/3_test/uartint.s b/3_test/uartint.s
index f1033f167a4f4c61758d1c9721f517059a8ab52e..d2b7d58e2b7f20b97ea1b8ac4c57c6da17fdc9f6 100644 (file)
--- a/3_test/uartint.s
+++ b/3_test/uartint.s
@@ -1,77 +1,112 @@
+.data
+str:
+       ; "zlol"
+       .fill 0x5a4c4f4c
+       .fill 0x00000a0d
+
+int2hex:
+       ;3210
+       .fill 0x33323130 
+       ;7654
+       .fill 0x37363534
+       ;ba98
+       .fill 0x62613938
+       ;fedc
+       .fill 0x66656463
 .text
+       .define UART_BASE, 0x2000
+       .define UART_STATUS, 0x0
+       .define UART_RECV, 0xc
+       .define UART_TRANS, 0x8
+
+       .define UART_TRANS_EMPTY, 0x1
+       .define UART_RECV_NEW, 0x2
 start:
        br+ main ;br+ 
-       call+ uartrdy ;call+ 0x80(128, 128)
+       br+ main
        ret
 main:
-       ldi r1, 0x200b ;ldi r1, 8203
-       ldi r2, 0x200c ;ldi r2, 8204
-       ldi r3, 0x2010 ;ldi r3, 8208
-       ldi r4, 0x2024 ;ldi r4, 8228
-       ldi r5, 3
-       stw r5, 0(r4)
-       br+ start
-       ; stwnv r5, 0(r4)
-uartrdy:
-       ; load instructions into ram
-       ldi r8, 0x2034 ; paddr
-       ldi r9, 0x2038 ; pdata
        xor r10, r10, r10
-       xor r11, r11, r11
+       xor r7, r7, r7
+       ldi r10, UART_BASE@lo
+       ldih r10, UART_BASE@hi
+       ldw r5, UART_STATUS(r10)
+       andx r5, UART_RECV_NEW
+       brzs+ main ; no new data?
+       ldw r7, UART_RECV(r10) ; load data
 
-       ; place this small program into instr-ram:
-       ;.text
-       ;start:
-       ;       br+ main
-       ;       call+ main
-       ;       ret
-       ;main:
-       ;       ldw r7, 0(r2)
-       ;       stw r7, 0(r1)
-       ;halt:
-       ;       br+ halt
+       xor r1, r1, r1
+       xor r2, r2, r2
+       xor r3, r3, r3
+       ldi r1, str
+       ldi r2, 6
+       call send_string
+       xor r1, r1, r1
+       xor r2, r2, r2
+       ldi r1, 0x12bd
+       ldih r1, 0x1337
+       call debug_uint
+       ldi r1, 0x1337
+       ldih r1, 0x12bd
+       call debug_uint
 
-       ;eb000183;br+ main;;
-       ldi r10, 0
-       stw r10, 0(r8)
-       ldi r11, 0x0183
-       ldih r11, 0xeb00
-       stw r11, 0(r9)
-       ;eb000107;call+ main;;
-       xor r10, r10, r10
-       ldi r10, 1
-       stw r10, 0(r8)
-       ldi r11, 0x107
-       ldih r11, 0xeb00
-       stw r11, 0(r9)
-       ;eb000008;ret;;
-       xor r10, r10, r10
-       ldi r10, 2
-       stw r10, 0(r8)
-       ldi r11, 0x8
-       ldih r11, 0xeb00
-       stw r11, 0(r9)
-       ;e7390000;ldw r7, 0(r2);;
-       xor r10, r10, r10
-       ldi r10, 3
-       stw r10, 0(r8)
-       ldi r11, 0x0
-       ldih r11, 0xeb00
-       stw r11, 0(r9)
-       ;e7b88000;stw r7, 0(r1);;
-       xor r10, r10, r10
-       ldi r10, 4
-       stw r10, 0(r8)
-       ldi r11, 0x8000
-       ldih r11, 0xe7b8
-       stw r11, 0(r9)
-       ;eb000003;br+ halt;;
-       xor r10, r10, r10
-       ldi r10, 5
-       stw r10, 0(r8)
-       ldi r11, 0x3
-       ldih r11, 0xeb00
-       stw r11, 0(r9)
+main2:
+       ldw r5, UART_STATUS(r10)
+       andx r5, UART_RECV_NEW
+       brzs+ main2 ; no new data?
+       ldb r7, UART_RECV(r10) ; load data
+uartnrdy:
+       ldw r5, 0(r0)
+       andx r5, UART_TRANS_EMPTY
+       brnz+ uartnrdy ; transmitter not ready yet?
+       stw r7, UART_TRANS(r10) ; send zeh shit!
+       br main2 ; back to usual stuff
+
+send_string:
+       ; r1 = addr
+       ; r2 = len
+       addi r3, r1, 0
+send_string_int:
+       cmpi r2, 0
+       reteq-
+       ldb r1, 0(r3)
+       call send_byte
+       addis r2, r2, 0-1
+       addi r3, r3, 1
+       br send_string_int
+
+send_byte:
+       ldw r9, UART_STATUS(r10)
+       andx r9, UART_TRANS_EMPTY
+       brnz+ send_byte ; branch if not zero
+       stb r1, UART_TRANS(r10)
+       ret
 
-leave:
-       ; just run and run, until we leave ROM and enter
+debug_uint:
+       addi r8, r1, 0
+       ;usb_sendbuffersafe ("0x", 2);
+       xor r1, r1, r1
+       ldi r1, 0x30
+       call send_byte
+       xor r1, r1, r1
+       ldi r1, 0x78
+       call send_byte
+       ;j = 0
+       xor r7, r7, r7
+       xor r6, r6, r6
+       ldi r6, int2hex@lo
+       ldih r6, int2hex@hi
+debug_unit_loop:
+       ;for (j = 0; j < 8; ++j) {
+       cmpi r7, 8
+       reteq
+       ;usb_sendbuffersafe (&int2hex[(i >> 28) & 0xf], 1);
+       lrs r1, r8, 28
+       andx r1, 0xf
+       add r9, r6, r1
+       ldb r1, 0(r9)
+       call send_byte
+       ;i <<= 4;
+       lls r8, r8, 4
+       addi r7, r7, 1
+       br debug_unit_loop