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-rw-r--r--sw/z80/arch/include/addresses.h4
-rw-r--r--sw/z80/drivers/include/pio.h11
-rw-r--r--sw/z80/drivers/include/usart.h4
-rw-r--r--sw/z80/drivers/pio.c33
-rw-r--r--sw/z80/tests/pio/dis.txt225
-rw-r--r--sw/z80/tests/pio/main.c48
-rw-r--r--sw/z80/tests/pio/makefile2
7 files changed, 68 insertions, 259 deletions
diff --git a/sw/z80/arch/include/addresses.h b/sw/z80/arch/include/addresses.h
index 07ab473..ec5eb96 100644
--- a/sw/z80/arch/include/addresses.h
+++ b/sw/z80/arch/include/addresses.h
@@ -4,9 +4,9 @@
#define ADDR_DEV_ROM_L 0x0000
#define ADDR_DEV_ROM_H 0x2000
-#define ADDR_DEV_USART 0x4000
+#define ADDR_DEV_PIO 0x0010
#define ADDR_DEV_CTC 0x4100
-#define ADDR_DEV_PIO 0x4200
+#define ADDR_DEV_USART 0x4200
#define ADDR_DEV_MMU
diff --git a/sw/z80/drivers/include/pio.h b/sw/z80/drivers/include/pio.h
index a1137e4..e234b05 100644
--- a/sw/z80/drivers/include/pio.h
+++ b/sw/z80/drivers/include/pio.h
@@ -4,6 +4,9 @@
#include "addresses.h"
#include <stdint.h>
+// DEBUG
+#define PIO_ASM_INTERFACE
+
// ports
#define PIO_A 0
#define PIO_B 1
@@ -12,10 +15,10 @@
#define PIO_REG_DATA 0
#define PIO_REG_CTRL 2
-// #define PIO_REG_DATA_A (PIO_A + PIO_REG_PORT)
-// #define PIO_REG_DATA_B 1 (PIO_B + PIO_REG_PORT)
-// #define PIO_REG_CTRL_A 2 (PIO_A + PIO_REG_CTRL)
-// #define PIO_REG_CTRL_B 3 (PIO_B + PIO_REG_CTRL)
+#define PIO_REG_DATA_A (PIO_A | PIO_REG_PORT)
+#define PIO_REG_DATA_B 1 (PIO_B | PIO_REG_PORT)
+#define PIO_REG_CTRL_A 2 (PIO_A | PIO_REG_CTRL)
+#define PIO_REG_CTRL_B 3 (PIO_B | PIO_REG_CTRL)
#define PIO_MODE_BYTE_OUT 0 // mode 0
#define PIO_MODE_BYTE_IN 1 // mode 1
diff --git a/sw/z80/drivers/include/usart.h b/sw/z80/drivers/include/usart.h
index fdc01e2..05aeb4a 100644
--- a/sw/z80/drivers/include/usart.h
+++ b/sw/z80/drivers/include/usart.h
@@ -6,7 +6,7 @@
#include <stdint.h>
#include <string.h>
-// baudrate clock divisors
+// baudrate clock divisors
// values from TL16C550C datasheet (table 9 for 1.8432 MHz crystal)
#define USART_BAUDRATE_50 2304
#define USART_BAUDRATE_75 1536
@@ -125,7 +125,7 @@ struct MSR
volatile uint data_carrier_detect :1;
};
-/* this structure is only for internal usage */
+/* this structure is only for internal use */
struct _usart_device
{
register_t buffer; // also used as LSB for divisor latch
diff --git a/sw/z80/drivers/pio.c b/sw/z80/drivers/pio.c
index 272e191..f396e43 100644
--- a/sw/z80/drivers/pio.c
+++ b/sw/z80/drivers/pio.c
@@ -1,33 +1,34 @@
#include "pio.h"
#ifdef PIO_ASM_INTERFACE
-/* old inline asm implementation */
-inline void _pio_write(uint8_t reg, uint8_t data)
+// TODO: set inline
+void _pio_write(uint8_t reg, uint8_t data)
{
__asm
- ;; pop function arguments
+ ;; pop function arguments data in h, reg in a (l)
pop hl
- ;; store data in A
- ld a, h
- ld h, #0
+ ld a, l
;; add ADDR_DEV_PIO to get the device address
- ld bc, #ADDR_DEV_PIO
- add hl, bc
+ add a, #ADDR_DEV_PIO
+ ld c, a
;; load data
- ld (hl), a
+ out (c), h
__endasm;
}
-inline uint8_t _pio_read(uint8_t reg) __naked
+inline uint8_t _pio_read(uint8_t reg)
{
+ // TODO: check "dec sp"
__asm
;; pop function argument
- pop l
- ld h, #0
+ dec sp
+ pop hl
+ ld a, l
;; add ADDR_DEV_PIO to get the device address
- ld bc, #ADDR_DEV_PIO
- add hl, bc
- ld l, (hl)
+ add a, #ADDR_DEV_PIO
+ ld c, a
+ ;; read data
+ in l, (c)
ret
__endasm;
}
@@ -68,7 +69,7 @@ void pio_set_interrupts_mask(int port, int control, uint8_t mask)
{
// 0x17 is a control sequence to set interrupts
// AND interpret the next byte as a bitmask
- _pio_write((PIO_REG_CTRL + port),(control | 0x17));
+ _pio_write((PIO_REG_CTRL + port),(control | 0x97));
_pio_write((PIO_REG_CTRL + port), mask);
}
diff --git a/sw/z80/tests/pio/dis.txt b/sw/z80/tests/pio/dis.txt
deleted file mode 100644
index 60bef8e..0000000
--- a/sw/z80/tests/pio/dis.txt
+++ /dev/null
@@ -1,225 +0,0 @@
-mkdir -p build
-
-sdcc -mz80 --allow-unsafe-read -I . -I ../../arch/include -I ../../drivers/include -DDEBUG -c main.c -o build/main.rel
-sdcc -mz80 --no-std-crt0 build/crt0.rel -L ../../drivers/build -l drivers.a -pedantic build/main.rel -o build/pio_test.hex
-makebin -s 8192 -yo 1 build/pio_test.hex build/pio_test.bin
-#dz80 -b -n build/pio_test.bin
-r2 -a z80 build/pio_test.bin -A \
--c 'afr main 0x200; \
- pd 0x10; \
- s 0x100; \
- pd 10; \
- s 0x200; \
- pd 0xa0' \
-
-/ (fcn) fcn.00000000 13
-| fcn.00000000 ();
-| ; XREFS: DATA 0x00000202 DATA 0x00000204 DATA 0x00000209 DATA 0x0000020c DATA 0x00000216 DATA 0x00000219 DATA 0x00000220 DATA 0x00000221
-| ; XREFS: DATA 0x00000226 DATA 0x00000256
-\ ,=< 0x00000000 c30001 jp loc.00000100
- | 0x00000003 ff rst 0x38
- | 0x00000004 ff rst 0x38
- | 0x00000005 ff rst 0x38
- | 0x00000006 ff rst 0x38
- | 0x00000007 ff rst 0x38
- | 0x00000008 ff rst 0x38
- | 0x00000009 ff rst 0x38
- | 0x0000000a ff rst 0x38
- | 0x0000000b ff rst 0x38
- | 0x0000000c ff rst 0x38
- | 0x0000000d ff rst 0x38
- | 0x0000000e ff rst 0x38
- | 0x0000000f ff rst 0x38
- | 0x00000010 ff rst 0x38
- | 0x00000011 ff rst 0x38
-|- loc.00000100 10
-| loc.00000100 ();
-| ; JMP XREF from 0x00000000 (fcn.00000000)
-| ; JMP XREF from 0x00000106 (loc.00000100)
-| 0x00000100 31ffff ld sp, 0xffff
-| 0x00000103 cd0002 call main
-| ,=< 0x00000106 c30901 jp 0x0109
-| | ; JMP XREF from 0x00000106 (loc.00000100)
-\ `-> 0x00000109 76 halt
- 0x0000010a ff rst 0x38
- 0x0000010b ff rst 0x38
- 0x0000010c ff rst 0x38
- 0x0000010d ff rst 0x38
- 0x0000010e ff rst 0x38
- 0x0000010f ff rst 0x38
-/ (fcn) main 50
-| main ();
-| ; CALL XREF from 0x00000103 (loc.00000100)
-| ; CALL XREF from 0x00000200 (main)
-| 0x00000200 0600 ld b, 0x00
-| 0x00000202 c5 push bc
-| 0x00000203 af xor a
-| 0x00000204 f5 push af
-| 0x00000205 33 inc sp
-| 0x00000206 210300 ld hl, 0x0003
-| 0x00000209 e5 push hl
-| 0x0000020a 2e00 ld l, 0x00
-| 0x0000020c e5 push hl
-| 0x0000020d cd5502 call fcn.00000255
-| 0x00000210 f1 pop af
-| 0x00000211 f1 pop af
-| 0x00000212 33 inc sp
-| 0x00000213 210000 ld hl, 0x0000
-| 0x00000216 e5 push hl
-| 0x00000217 2e00 ld l, 0x00
-| 0x00000219 e5 push hl
-| 0x0000021a cd8e02 call fcn.0000028e
-| 0x0000021d f1 pop af
-| 0x0000021e f1 pop af
-\ 0x0000021f c1 pop bc
-| ; JMP XREF from 0x00000230 (main)
-| .-> 0x00000220 c5 push bc
-| | 0x00000221 c5 push bc
-| | 0x00000222 33 inc sp
-| | 0x00000223 210000 ld hl, 0x0000
-| | 0x00000226 e5 push hl
-| | 0x00000227 cde002 call fcn.000002e0
-| | 0x0000022a f1 pop af
-| | 0x0000022b 33 inc sp
-| | 0x0000022c c1 pop bc
-| | 0x0000022d 78 ld a, b
-| | 0x0000022e 2f cpl
-| | 0x0000022f 47 ld b, a
-| `=< 0x00000230 18ee jr 0xee
- 0x00000232 210200 ld hl, 0x0002
- 0x00000235 39 add hl, sp
- 0x00000236 4e ld c, [hl]
- 0x00000237 0600 ld b, 0x00
- 0x00000239 210042 ld hl, 0x4200
- 0x0000023c 09 add hl, bc
- 0x0000023d fd210300 ld iy, 0x0003
- 0x00000241 fd39 add iy, sp
- 0x00000243 fd7e00 ld a, [iy+0x00]
- 0x00000246 77 ld [hl], a
- 0x00000247 c9 ret
- 0x00000248 210200 ld hl, 0x0002
- 0x0000024b 39 add hl, sp
- 0x0000024c 4e ld c, [hl]
- 0x0000024d 0600 ld b, 0x00
- 0x0000024f 210042 ld hl, 0x4200
- 0x00000252 09 add hl, bc
- 0x00000253 6e ld l, [hl]
- 0x00000254 c9 ret
-/ (fcn) fcn.00000255 8
-| fcn.00000255 ();
-| ; CALL XREF from 0x0000020d (main)
-| 0x00000255 dde5 push ix
-| 0x00000257 dd210000 ld ix, 0x0000
-\ 0x0000025b dd39 add ix, sp
- 0x0000025d dd7e06 ld a, [ix+0x06]
- 0x00000260 0f rrca
- 0x00000261 0f rrca
- 0x00000262 e6c0 and 0xc0
- 0x00000264 f60f or 0x0f
- 0x00000266 57 ld d, a
- 0x00000267 dd5e04 ld e, [ix+0x04]
- 0x0000026a 1c inc e
- 0x0000026b 1c inc e
- 0x0000026c 6b ld l, e
- 0x0000026d 2600 ld h, 0x00
- 0x0000026f 010042 ld bc, 0x4200
- 0x00000272 09 add hl, bc
- 0x00000273 72 ld [hl], d
- 0x00000274 dd7e06 ld a, [ix+0x06]
- 0x00000277 d603 sub 0x03
- ,=< 0x00000279 2010 jr nz, 0x10
- | 0x0000027b dd7e07 ld a, [ix+0x07]
- | 0x0000027e b7 or a
- ,==< 0x0000027f 200a jr nz, 0x0a
- || 0x00000281 dd4e08 ld c, [ix+0x08]
- || 0x00000284 1600 ld d, 0x00
- || 0x00000286 210042 ld hl, 0x4200
- || 0x00000289 19 add hl, de
- || 0x0000028a 71 ld [hl], c
- ``-> 0x0000028b dde1 pop ix
- 0x0000028d c9 ret
-/ (fcn) fcn.0000028e 29
-| fcn.0000028e ();
-| ; CALL XREF from 0x0000021a (main)
-| 0x0000028e 210400 ld hl, 0x0004
-| 0x00000291 39 add hl, sp
-| 0x00000292 7e ld a, [hl]
-| 0x00000293 07 rlca
-| 0x00000294 07 rlca
-| 0x00000295 07 rlca
-| 0x00000296 07 rlca
-| 0x00000297 e6f0 and 0xf0
-| 0x00000299 f607 or 0x07
-| 0x0000029b 4f ld c, a
-| 0x0000029c 210200 ld hl, 0x0002
-| 0x0000029f 39 add hl, sp
-| 0x000002a0 5e ld e, [hl]
-| 0x000002a1 1c inc e
-| 0x000002a2 1c inc e
-| 0x000002a3 1600 ld d, 0x00
-| 0x000002a5 210042 ld hl, 0x4200
-| 0x000002a8 19 add hl, de
-| 0x000002a9 71 ld [hl], c
-\ 0x000002aa c9 ret
- 0x000002ab dde5 push ix
- 0x000002ad dd210000 ld ix, 0x0000
- 0x000002b1 dd39 add ix, sp
- 0x000002b3 dd7e06 ld a, [ix+0x06]
- 0x000002b6 f617 or 0x17
- 0x000002b8 57 ld d, a
- 0x000002b9 dd5e04 ld e, [ix+0x04]
- 0x000002bc 1c inc e
- 0x000002bd 1c inc e
- 0x000002be 6b ld l, e
- 0x000002bf 2600 ld h, 0x00
- 0x000002c1 010042 ld bc, 0x4200
- 0x000002c4 09 add hl, bc
- 0x000002c5 72 ld [hl], d
- 0x000002c6 dd4e08 ld c, [ix+0x08]
- 0x000002c9 1600 ld d, 0x00
- 0x000002cb 210042 ld hl, 0x4200
- 0x000002ce 19 add hl, de
- 0x000002cf 71 ld [hl], c
- 0x000002d0 dde1 pop ix
- 0x000002d2 c9 ret
- 0x000002d3 210200 ld hl, 0x0002
- 0x000002d6 39 add hl, sp
- 0x000002d7 4e ld c, [hl]
- 0x000002d8 0600 ld b, 0x00
- 0x000002da 210042 ld hl, 0x4200
- 0x000002dd 09 add hl, bc
- 0x000002de 6e ld l, [hl]
- 0x000002df c9 ret
-/ (fcn) fcn.000002e0 18
-| fcn.000002e0 ();
-| ; CALL XREF from 0x00000227 (main)
-| 0x000002e0 210400 ld hl, 0x0004
-| 0x000002e3 39 add hl, sp
-| 0x000002e4 4e ld c, [hl]
-| 0x000002e5 210200 ld hl, 0x0002
-| 0x000002e8 39 add hl, sp
-| 0x000002e9 5e ld e, [hl]
-| 0x000002ea 1600 ld d, 0x00
-| 0x000002ec 210042 ld hl, 0x4200
-| 0x000002ef 19 add hl, de
-| 0x000002f0 71 ld [hl], c
-\ 0x000002f1 c9 ret
- 0x000002f2 ff rst 0x38
- 0x000002f3 ff rst 0x38
- 0x000002f4 ff rst 0x38
- 0x000002f5 ff rst 0x38
- 0x000002f6 ff rst 0x38
- 0x000002f7 ff rst 0x38
- 0x000002f8 ff rst 0x38
- 0x000002f9 ff rst 0x38
- 0x000002fa ff rst 0x38
- 0x000002fb ff rst 0x38
- 0x000002fc ff rst 0x38
- 0x000002fd ff rst 0x38
- 0x000002fe ff rst 0x38
- 0x000002ff ff rst 0x38
- 0x00000300 ff rst 0x38
- 0x00000301 ff rst 0x38
- 0x00000302 ff rst 0x38
- -- Change the graph block definition with graph.callblocks, graph.jmpblocks, graph.flagblocks
- [0x00000200]> [0x00000200]> q [0x00000200]> q [0x00000200]> q
diff --git a/sw/z80/tests/pio/main.c b/sw/z80/tests/pio/main.c
index c873e20..3687f50 100644
--- a/sw/z80/tests/pio/main.c
+++ b/sw/z80/tests/pio/main.c
@@ -1,16 +1,46 @@
-#include "pio.h"
+// #include "pio.h"
#include <stdint.h>
+#define PIO_A_DATA 0x10
+#define PIO_A_CMD 0x11
+#define PIO_B_DATA 0x12
+#define PIO_B_CMD 0x13
+
void main(void)
{
- uint8_t i = 0;
+ __asm
+ ;; output variable
+ ld h, #0x00
+
+ ;; set bit mode
+ ld a, #0xCF
+ ;; load cmd addr
+ ld c, #PIO_B_CMD
+ out (c), a
+ ;; set output
+ ld a, #0x00
+ out (c), a
+ ;; disable interrupts
+ ld a, #0x0C
+ out (c), a
+ ;; load data addr
+ ld c, #PIO_B_DATA
+loop:
+ out (c), h
+ ld a, h
+ cpl
+ ld h, a
+ jr loop
+ __endasm;
+
+ // uint8_t i = 0;
- pio_set_mode(PIO_A, PIO_MODE_BIT_IO, 0x00);
- pio_set_interrupts(PIO_A, PIO_INT_DISABLE);
+ // pio_set_mode(PIO_A, PIO_MODE_BIT_IO, 0x00);
+ // pio_set_interrupts(PIO_A, PIO_INT_DISABLE);
- while (1) {
- pio_write(PIO_A, i);
- i = ~i;
- }
-}
+ // while (1) {
+ // pio_write(PIO_A, i);
+ // i = ~i;
+ // }
+} \ No newline at end of file
diff --git a/sw/z80/tests/pio/makefile b/sw/z80/tests/pio/makefile
index f7f97be..1213902 100644
--- a/sw/z80/tests/pio/makefile
+++ b/sw/z80/tests/pio/makefile
@@ -66,7 +66,7 @@ dis: $(BINARY)
s 0x100; \
pd 10; \
s 0x200; \
- pd 0x95'
+ pd 0x95' | tee build/dis.txt
clean:
- rm -rd build
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-24 18:12:04 +0100