stm32/pyb_i2c: Add pyb_i2c_deinit_all function.

I2C objects can remain active after a soft-reboot because they are statically allocated and lack a finalizer to collect and deinitialize them. This commit adds a `pyb_i2c_deinit_all()` function for I2C, similar to other peripherals such as UART, DAC, etc. Signed-off-by: iabdalkader <[email protected]>
Infineon · Dec 9, 2024 · 405aa69 · 405aa69
1 parent d42e39d
commit 405aa69
Show file tree

Hide file tree

Showing 2 changed files with 10 additions and 0 deletions.
diff --git a/ports/stm32/i2c.h b/ports/stm32/i2c.h
@@ -50,6 +50,7 @@ void i2c_init0(void);
 int pyb_i2c_init(I2C_HandleTypeDef *i2c);
 int pyb_i2c_init_freq(const pyb_i2c_obj_t *self, mp_int_t freq);
 uint32_t pyb_i2c_get_baudrate(I2C_HandleTypeDef *i2c);
+void pyb_i2c_deinit_all(void);
 void i2c_ev_irq_handler(mp_uint_t i2c_id);
 void i2c_er_irq_handler(mp_uint_t i2c_id);
 

diff --git a/ports/stm32/pyb_i2c.c b/ports/stm32/pyb_i2c.c
@@ -428,6 +428,15 @@ int pyb_i2c_init_freq(const pyb_i2c_obj_t *self, mp_int_t freq) {
     return pyb_i2c_init(self->i2c);
 }
 
+void pyb_i2c_deinit_all(void) {
+    for (int i = 0; i < MP_ARRAY_SIZE(pyb_i2c_obj); i++) {
+        const pyb_i2c_obj_t *pyb_i2c = &pyb_i2c_obj[i];
+        if (pyb_i2c->i2c != NULL) {
+            i2c_deinit(pyb_i2c->i2c);
+        }
+    }
+}
+
 static void i2c_reset_after_error(I2C_HandleTypeDef *i2c) {
     // wait for bus-busy flag to be cleared, with a timeout
     for (int timeout = 50; timeout > 0; --timeout) {