Add lut dump

tw88xx.py

@@ -20,6 +20,10 @@ class TW88xx:
         SPI_FLASH_BUSY_CONTROL = 0X4D9
         DMA_LENGTH_HIGH_BYTE = 0X4DA
 
+        LUT_ACCESS_CTRL = 0x410
+        LUT_ADDR = 0x411
+        LUT_DATA = 0x412
+
     def __init__(self, i2c: I2CInterface) -> None:
         self.i2c = i2c
         self.page = None
@@ -104,3 +108,17 @@ class TW88xx:
         for r in self.REGS:
             val = self.read_reg(r)
             print(f'{r:03x} = {val:02x} ({self.REGS[r]})')
+
+    def dump_lut(self):
+        lut_ctrl = self.read_reg(TW88xx.Reg.LUT_ACCESS_CTRL) & 0xF0
+        tbl = {}
+        for i in range(512):
+            data=[]
+            for b in range(4):
+                self.write_reg(TW88xx.Reg.LUT_ACCESS_CTRL, lut_ctrl | (8 if i>256 else 0) | b)
+                self.write_reg(TW88xx.Reg.LUT_ADDR, i & 0xFF)
+                _ = self.read_reg(TW88xx.Reg.LUT_DATA)
+                data.append(self.read_reg(TW88xx.Reg.LUT_DATA))
+            print (f'{i:03x} = {bytes(data).hex()}')
+            tbl[i] = data
+        return tbl

tw88xx_util.py

@@ -5,7 +5,7 @@ parser = argparse.ArgumentParser(description='TW88xx debug utility.')
 
 parser.add_argument('command',
                     help='the command to execute',
-                    choices=('dump_flash', 'get_id', 'dump_regs')
+                    choices=('dump_flash', 'get_id', 'dump_regs', 'dump_lut')
                     )
 parser.add_argument('-f', '--flash_file',
                     help='file to read from / write into'
@@ -76,3 +76,10 @@ elif args.command == 'dump_flash':
 
 elif args.command == 'dump_regs':
     tw88xx.dump_regs()
+
+elif args.command == 'dump_lut':
+    tbl = tw88xx.dump_lut()
+    if args.flash_file:
+        with open(args.flash_file,'w') as f:
+            for r in sorted(tbl):
+                f.write(f'{r:03x}={bytes(tbl[r]).hex()}\n')