debugger: Add more SFRs

Author: Sean Cross

doc/ax215.md

@@ -40,11 +40,11 @@ Special Function Registers
     -----+-------+-------+-------+-------+-------+-------+-------+-------+
      98  |       |       |       |       |       |       |       |       |
     -----+-------+-------+-------+-------+-------+-------+-------+-------+
-     A0  |       |       |       |       |       |       |       |       |
+     A0  | SDUN4 | SDUN5 |       |       |       |       |       |       |
     -----+-------+-------+-------+-------+-------+-------+-------+-------+
      A8  |  IE   |       |       |       |       |       |       |       |
     -----+-------+-------+-------+-------+-------+-------+-------+-------+
-     B0  |       |       |       |       |       |       |       |       |
+     B0  |       |       |       |       |       | SDUN6 |       |       |
     -----+-------+-------+-------+-------+-------+-------+-------+-------+
      B8  |       | SDFMT |       |       |       |       |       |       |
     -----+-------+-------+-------+-------+-------+-------+-------+-------+
@@ -56,11 +56,11 @@ Special Function Registers
     -----+-------+-------+-------+-------+-------+-------+-------+-------+
      D8  | ER20  | ER21  | ER22  | ER23  |       |       | SDXBL | SDXBH |
     -----+-------+-------+-------+-------+-------+-------+-------+-------+
-     E0  | ACC   |       |       |       |       |       | SDCMD | SDX   |
+     E0  | ACC   |       |       | SDUN1 | SDUN2 | SDUN3 | SDCMD | SDX   |
     -----+-------+-------+-------+-------+-------+-------+-------+-------+
      E8  | SDXSM | SDI1  | SDI2  | SDI3  | SDI4  |       | GPIO1 |       |
     -----+-------+-------+-------+-------+-------+-------+-------+-------+
-     F0  | B     |       | GPIO2 |       |       |       |       |       |
+     F0  | B     |       | GPIO2 |       |       |       |       | GPIOI |
     -----+-------+-------+-------+-------+-------+-------+-------+-------+
      F8  | ER30  | ER31  | ER32  | ER33  |       |       |       |       |
     -----+-------+-------+-------+-------+-------+-------+-------+-------+
@@ -97,6 +97,18 @@ ER32 - Extended Register 3, byte 2
 
 ER33 - Extended Register 3, byte 3
 
+SDUN1 - Modifying this register affects the SD pins in an unknown fashion.
+
+SDUN2 - Modifying this register affects the SD pins in an unknown fashion.
+
+SDUN3 - Modifying this register affects the SD pins in an unknown fashion.
+
+SDUN4 - Modifying this register affects the SD pins in an unknown fashion.
+
+SDUN5 - Modifying this register affects the SD pins in an unknown fashion.
+
+SDUN6 - Modifying this register affects the SD pins in an unknown fashion.
+
 SDXBL - SD Transmission byte count (low byte)
 
 SDXBH - SD Transmission byte count (high byte)
@@ -130,6 +142,12 @@ GPIO2 - Seems to control values for GPIO pins.  1 sets pin high, 0 sets low.
 	0x10 - DAT2
 	0x08 - DAT1
 
+GPIOI - GPIO input values:
+	0x04 - DAT0
+	0x08 - DAT1
+	0x10 - DAT2
+	0x20 - DAT3
+
 0xf0 -> Can be set to 0, stays 0
 0xf1 -> Can be set to 0, stays 0
 0xf2 -> Can be set to 0, stays 0

src/ax215/debugger.c

@@ -135,6 +135,7 @@ static struct debug_command debug_commands[] = {
                 "   -d          Dump internal ram\n"
                 "   -w addr:val Set RAM [addr] to value [val]\n"
                 "   -i addr     Invert RAM contents\n"
+                "   -n addr     Set register [addr] to random value\n"
                 "   -r addr     Read RAM [addr]\n"
                 "   -x addr     Read 32-bit register [addr]\n"
                 ,
@@ -147,6 +148,7 @@ static struct debug_command debug_commands[] = {
                 "   -d          Dump special function registers\n"
                 "   -w sfr:val  Set SFR [sfr] to value [val]\n"
                 "   -i addr     Invert RAM contents\n"
+                "   -n addr     Set register [addr] to random value\n"
                 "   -r sfr      Read SFR [sfr]\n"
                 "   -x sfr      Read extended (quad-wide-wide) sfr\n"
                 ,
@@ -173,7 +175,7 @@ static struct debug_command debug_commands[] = {
     {
         .name = "irq",
         .func = dbg_do_irq,
-        .desc = "Manipulate IRQs on the AX215\n",
+        .desc = "Manipulate IRQs on the AX215",
         .help = "Usage: irq [-r] [-m mask] [-p]\n"
                 "   -r      Reset IRQ statistics\n"
                 "   -p      Print IRQ statistics\n"
@@ -183,7 +185,7 @@ static struct debug_command debug_commands[] = {
     {
         .name = "gpio",
         .func = dbg_do_gpio,
-        .desc = "Set/query GPIO values\n",
+        .desc = "Set/query GPIO values",
         .help = "Usage: gpio [-d] [-i DATpin] [-o DATpin] [-s/-c DATpin]\n"
                 "   -d      Dump GPIO values\n"
                 "   -i x    Make DATx a GPIO input\n"
@@ -330,7 +332,7 @@ static int dbg_do_sfr(struct dbg *dbg, int argc, char **argv) {
     if (!strcmp(argv[0], "sfr"))
         offset = 0x80;
 
-    while ((ch = getopt(argc, argv, "di:w:r:x:")) != -1) {
+    while ((ch = getopt(argc, argv, "di:w:r:x:n:")) != -1) {
         switch(ch) {
         case 'd':
             for (sfr = 0; sfr <= 127; sfr++) {
@@ -392,6 +394,27 @@ static int dbg_do_sfr(struct dbg *dbg, int argc, char **argv) {
             }
             break;
 
+        case 'n': {
+                int sfr = strtoul(optarg, NULL, 0);
+                int val;
+                if (offset && (sfr < 0x80 || sfr > 0xff)) {
+                    printf("Invalid SFR.  "
+                            "SFR addresses go between 0x80 and 0xff\n");
+                    return -EINVAL;
+                }
+                if (!offset && (sfr < 0x00 || sfr > 0x7f)) {
+                    printf("Invalid RAM address.  "
+                            "RAM addresses go between 0x00 and 0x7f\n");
+                    return -EINVAL;
+                }
+
+                val = rand() & 0xff;
+                printf("Setting %s_%02x 0x%02x -> %02x\n",
+                        offset?"SFR":"RAM", sfr, ram_get(dbg, sfr), val);
+                ram_set(dbg, sfr, val);
+            }
+            break;
+
         case 'x':
         case 'r': {
                 uint8_t cmd[4];
@@ -1067,7 +1090,11 @@ static int install_isrs(struct dbg *dbg) {
     ram_set(dbg, 0xfb, 0);      // Reset count
     printf("UNK ");
 
-    printf("] Okay\n");
+    printf("] ");
+    printf("Enabling... ");
+    ram_set(dbg, 0xa8, 0xff);
+
+    printf("Okay\n");
     return 0;
 }