I2C working correctly. Both devices are detected

.vscode/launch.json

@@ -11,20 +11,20 @@
             "targetId": "py32f030x8", 
             "svdFile": "CMSIS/Device/PY32F0xx/py32f030axx.svd",
             "preLaunchTask": "Build",
-            "showDevDebugOutput":"none",
+            "showDevDebugOutput":"raw",
         },
         {
             "name": "J-Link",
             "type": "cortex-debug",
             "request": "launch",
             "cwd": "${workspaceRoot}",
-            "executable": "build/${workspaceFolderBasename}.elf",
+            "executable": "${workspaceRoot}\\build\\${workspaceFolderBasename}.elf",
             "servertype": "jlink",
+            //"armToolchainPath": "C:\\Users\\developer\\Documents\\MBoeding\\Development\\13.2-Rel1\\bin",
             "device": "py32f030x8",
-            //"device": "Cortex-M0", 
             "svdFile": "CMSIS/Device/PY32F0xx/py32f030axx.svd",
             "preLaunchTask": "Build",
-            "showDevDebugOutput":"none",
+            "showDevDebugOutput":"raw",
         }
     ]
 }
\ No newline at end of file

Makefile

@@ -146,7 +146,7 @@ AS_INCLUDES =
 # compile gcc flags
 ASFLAGS = $(MCU) $(AS_DEFS) $(AS_INCLUDES) $(OPT) -Wall -fdata-sections -ffunction-sections
 
-CFLAGS = $(MCU) $(C_DEFS) $(C_INCLUDES) $(OPT) -Wall -Wno-maybe-uninitialized -fdata-sections -ffunction-sections
+CFLAGS = $(MCU) $(C_DEFS) $(C_INCLUDES) $(OPT) -Wall -Wno-maybe-uninitialized -fdata-sections -ffunction-sections -v
 
 ifeq ($(DEBUG), 1)
 CFLAGS += -g -gdwarf-2

src/main.c

 #include <stdio.h>
-#include "py32f0xx.h"
+#include <py32f0xx.h>
 #include <py32f030x8.h>
 #include <py32f0xx_hal_gpio.h>
-#include "py32f0xx_hal_i2c.h"
+#include <py32f0xx_hal_i2c.h>
 #include <py32f0xx_hal_gpio_ex.h>
-#include "py32f0xx_hal.h"
+#include <py32f0xx_hal.h>
 
 #define DUMMY_REGISTER    0x00
 #define I2C_SPEEDCLOCK   100000             /* Communication speed 100K */
@@ -19,21 +19,24 @@ void SysTick_Handler()
 }
 
 void GPIO_I2C_Init(void) {
-    __HAL_RCC_I2C_CLK_ENABLE();
-    __HAL_RCC_GPIOB_CLK_ENABLE();
 
     GPIO_InitTypeDef GPIO_InitStruct = {0};
 
+    __HAL_RCC_I2C_CLK_ENABLE();
+    __HAL_RCC_GPIOB_CLK_ENABLE();
+
     // Configure SCL (Pin 6)
-    GPIO_InitStruct.Pin = GPIO_PIN_6;
+    GPIO_InitStruct.Pin = GPIO_PIN_6 | GPIO_PIN_7;
     GPIO_InitStruct.Mode = GPIO_MODE_AF_OD; // Open Drain for I2C
-    //GPIO_InitStruct.Pull = GPIO_PULLUP; // Pull-up resistor
+    GPIO_InitStruct.Pull = GPIO_PULLUP; // Pull-up resistor
     GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH; // High speed
+    GPIO_InitStruct.Alternate = GPIO_AF6_I2C;
     HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
-
+    __HAL_RCC_I2C_FORCE_RESET();
+    __HAL_RCC_I2C_RELEASE_RESET();
     // Configure SDA (Pin 7)
-    GPIO_InitStruct.Pin = GPIO_PIN_7;
-    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
+    //GPIO_InitStruct.Pin = GPIO_PIN_7;
+    //HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 }
 
 void I2C_Init(void) {