stm32/i2c: Guard irq handlers.

Signed-off-by: Damien George <[email protected]>

Author: dpgeorge

ports/stm32/i2c.c

@@ -552,7 +552,9 @@ static const uint8_t i2c_available =
     #endif
 ;
 
+#if MICROPY_HW_ENABLE_HW_I2C_TARGET
 uint8_t i2c_target_enabled;
+#endif
 
 int i2c_find_peripheral(mp_obj_t id) {
     int i2c_id = 0;
@@ -599,9 +601,12 @@ int i2c_find_peripheral(mp_obj_t id) {
 void I2C1_EV_IRQHandler(void) {
     MP_STATIC_ASSERT(I2C1_EV_IRQn > 0);
     IRQ_ENTER(I2C1_EV_IRQn);
+    #if MICROPY_HW_ENABLE_HW_I2C_TARGET
     if (i2c_target_enabled & 1) {
         i2c_slave_ev_irq_handler(I2C1);
-    } else {
+    } else
+    #endif
+    {
         i2c_ev_irq_handler(1);
     }
     IRQ_EXIT(I2C1_EV_IRQn);
@@ -619,9 +624,12 @@ void I2C1_ER_IRQHandler(void) {
 void I2C2_EV_IRQHandler(void) {
     MP_STATIC_ASSERT(I2C2_EV_IRQn > 0);
     IRQ_ENTER(I2C2_EV_IRQn);
+    #if MICROPY_HW_ENABLE_HW_I2C_TARGET
     if (i2c_target_enabled & 2) {
         i2c_slave_ev_irq_handler(I2C2);
-    } else {
+    } else
+    #endif
+    {
         i2c_ev_irq_handler(2);
     }
     IRQ_EXIT(I2C2_EV_IRQn);
@@ -639,9 +647,12 @@ void I2C2_ER_IRQHandler(void) {
 void I2C3_EV_IRQHandler(void) {
     MP_STATIC_ASSERT(I2C3_EV_IRQn > 0);
     IRQ_ENTER(I2C3_EV_IRQn);
+    #if MICROPY_HW_ENABLE_HW_I2C_TARGET
     if (i2c_target_enabled & 4) {
         i2c_slave_ev_irq_handler(I2C3);
-    } else {
+    } else
+    #endif
+    {
         i2c_ev_irq_handler(3);
     }
     IRQ_EXIT(I2C3_EV_IRQn);
@@ -659,9 +670,12 @@ void I2C3_ER_IRQHandler(void) {
 void I2C4_EV_IRQHandler(void) {
     MP_STATIC_ASSERT(I2C4_EV_IRQn > 0);
     IRQ_ENTER(I2C4_EV_IRQn);
+    #if MICROPY_HW_ENABLE_HW_I2C_TARGET
     if (i2c_target_enabled & 8) {
         i2c_slave_ev_irq_handler(I2C4);
-    } else {
+    } else
+    #endif
+    {
         i2c_ev_irq_handler(4);
     }
     IRQ_EXIT(I2C4_EV_IRQn);