fix instruction: adc (3rd arg is mux, not pad)

ThomasWaldmann · ThomasWaldmann · commit b13e3daf6b00 · 2018-03-14T07:49:29.000+01:00
this might be wrong in ulp.h as the wrong implementation
was inspired from that.

the tech ref and the prog guide both talk about the mux (not the pad).
diff --git a/esp32_ulp/opcodes.py b/esp32_ulp/opcodes.py
@@ -378,9 +378,9 @@ def i_wait(cycles):
     return _delay.all
 
 
-def i_adc(reg_dest, adc_idx, pad_idx):
+def i_adc(reg_dest, adc_idx, mux):
     _adc.dreg = get_reg(reg_dest)
-    _adc.mux = get_imm(pad_idx) + 1
+    _adc.mux = get_imm(mux)
     _adc.sar_sel = get_imm(adc_idx)
     _adc.unused1 = 0
     _adc.cycles = 0
diff --git a/tests/compat/io.S b/tests/compat/io.S
@@ -6,4 +6,4 @@
             i2c_rd 0x10, 7, 0, 0
             i2c_wr 0x23, 0x42, 7, 0, 1
 
-            adc r0, 0, 1
+            adc r0, 1, 2
