possible dependency issue in i2c.cpp

[Christoph Döberl]

Fresh clone with any board results in this error:

src/i2c.cpp: In function 'void i2c_scan()':
src/i2c.cpp:75:46: error: too few arguments to function 'int I2CDiscoverDevice(BBI2C*, uint8_t, uint32_t*)'
         iDevice = I2CDiscoverDevice(&bbi2c, i);
                                              ^
In file included from include/i2c.h:5,
                 from src/i2c.cpp:3:
.pio/libdeps/usb/BitBang_I2C/src/BitBang_I2C.h:151:5: note: declared here
 int I2CDiscoverDevice(BBI2C *pI2C, uint8_t i, uint32_t *pCapabilities);
     ^~~~~~~~~~~~~~~~~
Compiling .pio/build/usb/src/power.cpp.o
*** [.pio/build/usb/src/i2c.cpp.o] Error 1

Is this a dependency issue with the BitBang library?

[Christoph Döberl]

I was able to workaround the compile error by applying:

diff --git a/src/i2c.cpp b/src/i2c.cpp
index cc13910..e7bc51f 100644
--- a/src/i2c.cpp
+++ b/src/i2c.cpp
@@ -72,7 +72,7 @@ void i2c_scan(void) {
       if (map[i >> 3] & (1 << (i & 7))) // device found
       {
         iCount++;
-        iDevice = I2CDiscoverDevice(&bbi2c, i);
+        iDevice = I2CDiscoverDevice(&bbi2c, i, 0);
         ESP_LOGI(TAG, "Device found at 0x%X, type = %s", i,
                  szNames[iDevice]); // show the device name as a string
       }

But this results in a runtime error and reboot loop.

22:55:47.002 > Guru Meditation Error: Core  1 panic'ed (StoreProhibited). Exception was unhandled.
22:55:47.003 > 
22:55:47.003 > Core  1 register dump:
22:55:47.003 > PC      : 0x400dff46  PS      : 0x00060330  A0      : 0x800d44ef  A1      : 0x3ffcf440  
22:55:47.003 > A2      : 0x00000001  A3      : 0x00100000  A4      : 0x00000000  A5      : 0x3ffc64bc  
22:55:47.025 > A6      : 0x00000001  A7      : 0x00000000  A8      : 0x00000001  A9      : 0x3ffcf410  
22:55:47.025 > A10     : 0x00000001  A11     : 0x00000001  A12     : 0x00000001  A13     : 0x3ffcf444  
22:55:47.025 > A14     : 0x00000001  A15     : 0x00000001  SAR     : 0x0000001c  EXCCAUSE: 0x0000001d  
22:55:47.059 > EXCVADDR: 0x00000000  LBEG    : 0x400927f4  LEND    : 0x4009280a  LCOUNT  : 0xffffffff  
22:55:47.059 > 
22:55:47.059 > 
22:55:47.059 > Backtrace:0x400dff43:0x3ffcf4400x400d44ec:0x3ffcf470 0x400d57f1:0x3ffcf560 0x400eda8e:0x3ffcf640 
22:55:47.059 >   #0  0x400dff43:0x3ffcf4400 in I2CDiscoverDevice(mybbi2c*, unsigned char, unsigned int*) at .pio/libdeps/usb/BitBang_I2C/src/BitBang_I2C.cpp:854

[Christoph Döberl]

downgrading the BitBang_I2C library fixes the issue temporarily.

diff --git a/platformio_orig.ini b/platformio_orig.ini
index f1eba0c..64437f4 100644
--- a/platformio_orig.ini
+++ b/platformio_orig.ini
@@ -62,6 +62,7 @@ lib_deps_lora =
     mcci-catena/MCCI LoRaWAN LMIC library @ ^4.1.1
 lib_deps_display =
     bitbank2/OneBitDisplay @ ^1.11.0
+    bitbank2/BitBang_I2C @ 2.1.5
     ricmoo/QRCode @ ^0.0.1
     bodmer/TFT_eSPI @ ^2.3.84
 lib_deps_ledmatrix =

[loratrak]

I had the same issue some days ago, did a downgraded in BitBang and it works!!

[Verkehrsrot]

This should be fixed now.
30b56c8