From 49148e76706e5e24c2ba7f6ccc1d7ec4736ab2f3 Mon Sep 17 00:00:00 2001
From: root <root@ka-ata-killa.ourano.james.local>
Date: Wed, 3 Mar 2021 15:24:13 +0000
Subject: support cheap chinese blue pill boards, make usb dfu compatible with
 dfuse

---
 app/i2c_bb.c | 70 +++++++++++++++++++++++++++++-------------------------------
 1 file changed, 34 insertions(+), 36 deletions(-)

(limited to 'app/i2c_bb.c')

diff --git a/app/i2c_bb.c b/app/i2c_bb.c
index f392b5e..cfa6742 100644
--- a/app/i2c_bb.c
+++ b/app/i2c_bb.c
@@ -106,57 +106,54 @@ static void i2c_bb_sm (int od, int d, int oc, int c)
   }
 
   // Check for STOP
-  if (oc && c && !od && d) {
+  if (oc && c && !od && d)
     state = ST_LOST;
-  }
 
   switch (state) {
   case ST_LOST:
     i2c_bb_sda (1);
     i2c_bb_scl (1);
     break;
+
   case ST_ADDRESS_7...ST_ADDRESS_0:
 
-    if (! (!oc && c)) {
+    if (! (!oc && c))
       break;
-    }
 
     //rising scl of a7...a0
     sr = (sr << 1) | !!d;
 
     if (state == ST_ADDRESS_0) {
-      if ( (sr & ~I2C_READ) == OUR_ADDRESS) {
+      if ((sr & ~I2C_READ) == OUR_ADDRESS) {
         state++;
         rnw = d;
-      } else {
+      } else
         state = ST_LOST;
-      }
-    } else {
+    } else
       state++;
-    }
 
     break;
+
   case ST_ADDRESS_ACK:
 
-    if (! (oc && !c)) {
+    if (! (oc && !c))
       break;
-    }
 
     //falling scl of a0
     i2c_bb_sda (0);
 
-    if (rnw) {
+    if (rnw)
       state++;
-    } else {
+
+    else
       state = ST_PREP_REG_7;
-    }
 
     break;
+
   case ST_OUT_7:
 
-    if (! (oc && !c)) {
+    if (! (oc && !c))
       break;
-    }
 
     //falling scl of ack
     i2c_bb_sda (1);
@@ -168,32 +165,32 @@ static void i2c_bb_sm (int od, int d, int oc, int c)
     i2c_bb_scl (1);
     state++;
     break;
+
   case ST_OUT_6...ST_OUT_0:
 
-    if (! (oc && !c)) {
+    if (! (oc && !c))
       break;
-    }
 
     //falling scl of d6...d0
     i2c_bb_sda (sr & 0x80);
     sr <<= 1;
     state++;
     break;
+
   case ST_PREP_OUT_ACK:
 
-    if (! (oc && !c)) {
+    if (! (oc && !c))
       break;
-    }
 
     //falling scl of d0
     i2c_bb_sda (1);
     state++;
     break;
+
   case ST_OUT_ACK:
 
-    if (! (!oc && c)) {
+    if (! (!oc && c))
       break;
-    }
 
     //rising scl of ack
 
@@ -207,74 +204,74 @@ static void i2c_bb_sm (int od, int d, int oc, int c)
     }
 
     break;
+
   case ST_PREP_REG_7:
 
-    if (! (oc && !c)) {
+    if (! (oc && !c))
       break;
-    }
 
     //falling scl of ack
     i2c_bb_sda (1);
     sr = 0;
     state++;
     break;
+
   case ST_REG_7...ST_REG_0:
 
-    if (! (!oc && c)) {
+    if (! (!oc && c))
       break;
-    }
 
     //rising scl of r7..r0
     sr = (sr << 1) | !!d;
     state++;
     break;
+
   case ST_REG_ACK:
 
-    if (! (oc && !c)) {
+    if (! (oc && !c))
       break;
-    }
 
     //falling scl of r0
     reg = sr;
     i2c_bb_sda (0);
     state = ST_PREP_IN_7;
     break;
+
   case ST_PREP_IN_7:
 
-    if (! (oc && !c)) {
+    if (! (oc && !c))
       break;
-    }
 
     //falling scl of ack
     i2c_bb_sda (1);
     sr = 0;
     state++;
     break;
+
   case ST_IN_7...ST_IN_0:
 
-    if (! (!oc && c)) {
+    if (! (!oc && c))
       break;
-    }
 
     //rising scl of i7..i0
     sr = (sr << 1) | !!d;
     state++;
     break;
+
   case ST_IN_ACK:
 
-    if (! (oc && !c)) {
+    if (! (oc && !c))
       break;
-    }
 
     //falling scl of i0
     i2c_bb_sda (0);
     state++;
     break;
+
   case ST_REG_WRITE:
 
-    if (! (oc && !c)) {
+    if (! (oc && !c))
       break;
-    }
 
     //falling scl of ack
     i2c_bb_sda (1);
@@ -286,6 +283,7 @@ static void i2c_bb_sm (int od, int d, int oc, int c)
     sr = 0;
     state = ST_IN_7;
     break;
+
   default:
     state = ST_LOST;
   }
-- 
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