STM32: Enable I2CTarget for STM32L4.

chrismas9 · chrismas9 · commit aaaef87b2655 · 2025-08-18T00:38:28.000+10:00
STM32L4 uses the same I2C controller as STM32WB.
Change `defined(STM32WB)` to `defined(STM32WB) || defined(STM32L4)` in:
stm32/i2cslav
stm32/i2cslave.h
stm32/mpconfigboard_common.h

Signed-off-by: Chris Mason &lt;c.mason@inchipdesign.com.au&gt;
diff --git a/ports/stm32/i2cslave.c b/ports/stm32/i2cslave.c
@@ -76,7 +76,7 @@ void i2c_slave_irq_handler(i2c_slave_t *i2c) {
     }
 }
 
-#elif defined(STM32F7) || defined(STM32H7) || defined(STM32WB)
+#elif defined(STM32F7) || defined(STM32H7) || defined(STM32WB) || defined(STM32L4)
 
 void i2c_slave_init_helper(i2c_slave_t *i2c, int addr) {
     i2c->CR1 = I2C_CR1_STOPIE | I2C_CR1_ADDRIE | I2C_CR1_RXIE | I2C_CR1_TXIE;
diff --git a/ports/stm32/i2cslave.h b/ports/stm32/i2cslave.h
@@ -28,7 +28,7 @@
 
 #include STM32_HAL_H
 
-#if defined(STM32F4) || defined(STM32F7) || defined(STM32H7) || defined(STM32WB)
+#if defined(STM32F4) || defined(STM32F7) || defined(STM32H7) || defined(STM32WB) || defined(STM32L4)
 
 #if !defined(I2C2_BASE)
 // This MCU doesn't have I2C2_BASE, define it so that the i2c_idx calculation works.
@@ -63,7 +63,7 @@ static inline void i2c_slave_init(i2c_slave_t *i2c, int irqn, int irq_pri, int a
         volatile uint32_t tmp = RCC->APB1ENR1; // Delay after enabling clock
         (void)tmp;
     }
-    #elif defined(STM32WB)
+    #elif defined(STM32WB) || defined(STM32L4)
     RCC->APB1ENR1 |= 1 << (RCC_APB1ENR1_I2C1EN_Pos + i2c_idx);
     volatile uint32_t tmp = RCC->APB1ENR1; // Delay after enabling clock
     (void)tmp;
diff --git a/ports/stm32/mpconfigboard_common.h b/ports/stm32/mpconfigboard_common.h
@@ -640,7 +640,7 @@
     || defined(MICROPY_HW_I2C3_SCL) || defined(MICROPY_HW_I2C4_SCL)
 #define MICROPY_HW_ENABLE_HW_I2C (1)
 #ifndef MICROPY_HW_ENABLE_HW_I2C_TARGET
-#if defined(STM32F4) || defined(STM32F7) || defined(STM32H7) || defined(STM32WB)
+#if defined(STM32F4) || defined(STM32F7) || defined(STM32H7) || defined(STM32WB) || defined(STM32L4)
 #define MICROPY_HW_ENABLE_HW_I2C_TARGET (1)
 #else
 #define MICROPY_HW_ENABLE_HW_I2C_TARGET (0)

Original file line number	Diff line number	Diff line change
`@@ -76,7 +76,7 @@ void i2c_slave_irq_handler(i2c_slave_t *i2c) {`
`76`	`76`	`}`
`77`	`77`	`}`
`78`	`78`
`79`		`-#elif defined(STM32F7) \|\| defined(STM32H7) \|\| defined(STM32WB)`
	`79`	`+#elif defined(STM32F7) \|\| defined(STM32H7) \|\| defined(STM32WB) \|\| defined(STM32L4)`
`80`	`80`
`81`	`81`	`void i2c_slave_init_helper(i2c_slave_t *i2c, int addr) {`
`82`	`82`	`i2c->CR1 = I2C_CR1_STOPIE \| I2C_CR1_ADDRIE \| I2C_CR1_RXIE \| I2C_CR1_TXIE;`