Add ability to read/write arbitrary memory. Write LED blinker program.

[fw/altos] / ccdbg.c

diff --git a/ccdbg.c b/ccdbg.c
index a2b5946db62ec0ad8e4d7fd14a9ff0e18a492c22..a35481438bc4db6b8897d95429a219df4d87679e 100644 (file)
--- a/ccdbg.c
+++ b/ccdbg.c
@@ -18,18 +18,80 @@
 
 #include "ccdbg.h"
 
+#define MOV_direct_data                0x75
+#define LJMP                   0x02
+#define MOV_Rn_data(n)         (0x78 | (n))
+#define DJNZ_Rn_rel(n)         (0xd8 | (n))
+
+#if 0
+static uint8_t instructions[] = {
+       3, MOV_direct_data, 0xfe, 0x02,
+       3, MOV_direct_data, 0x90, 0xff,
+       0
+};
+#endif
+
+static uint8_t mem_instr[] = {
+       MOV_direct_data, 0xfe, 0x02,
+       MOV_direct_data, 0x90, 0xff,
+       MOV_Rn_data(2), 0x10,
+       MOV_Rn_data(0), 0xff,
+       MOV_Rn_data(1), 0xff,
+       DJNZ_Rn_rel(1), 0xfe,
+       DJNZ_Rn_rel(0), 0xfa,
+       DJNZ_Rn_rel(2), 0xf6,
+       MOV_direct_data, 0x90, 0xfd,
+       MOV_Rn_data(2), 0x10,
+       MOV_Rn_data(0), 0xff,
+       MOV_Rn_data(1), 0xff,
+       DJNZ_Rn_rel(1), 0xfe,
+       DJNZ_Rn_rel(0), 0xfa,
+       DJNZ_Rn_rel(2), 0xf6,
+       LJMP, 0xf0, 0x03
+};
+
+static uint8_t jump_mem[] = {
+       3, LJMP, 0xf0, 0x00,
+       0
+};
+
 int
 main (int argc, char **argv)
 {
        struct ccdbg    *dbg;
        uint8_t         status;
+       uint16_t        chip_id;
+       uint16_t        pc;
+       uint8_t         memory[0x10];
+       int             i;
 
        dbg = ccdbg_open("/dev/ttyUSB0");
        if (!dbg)
                exit (1);
+#if 0
+       ccdbg_manual(dbg, stdin);
+#endif
+#if 1
        ccdbg_reset(dbg);
+       ccdbg_debug_mode(dbg);
        status = ccdbg_read_status(dbg);
        printf("Status: 0x%02x\n", status);
+       chip_id = ccdbg_get_chip_id(dbg);
+       printf("Chip id: 0x%04x\n", chip_id);
+       status = ccdbg_halt(dbg);
+       printf ("halt status: 0x%02x\n", status);
+/*     ccdbg_execute(dbg, instructions); */
+       ccdbg_write_memory(dbg, 0xf000, mem_instr, sizeof (mem_instr));
+       ccdbg_read_memory(dbg, 0xf000, memory, sizeof (memory));
+       for (i = 0; i < sizeof (memory); i++)
+               printf (" %02x", memory[i]);
+       printf ("\n");
+       ccdbg_execute(dbg, jump_mem);
+       pc = ccdbg_get_pc(dbg);
+       printf ("pc starts at 0x%04x\n", pc);
+       status = ccdbg_resume(dbg);
+       printf ("resume status: 0x%02x\n", status);
+#endif
        ccdbg_close(dbg);
        exit (0);
 }