diff --git a/libraries/Wire/src/utility/twi.c b/libraries/Wire/src/utility/twi.c
index 19eb3e337a..507fc63d96 100644
--- a/libraries/Wire/src/utility/twi.c
+++ b/libraries/Wire/src/utility/twi.c
@@ -420,7 +420,49 @@ static uint32_t i2c_getClkFreq(I2C_TypeDef *i2c)
#else
clkSrcFreq = HAL_RCCEx_GetPeriphCLKFreq(RCC_PERIPHCLK_I2C35);
#endif
+ if (clkSrcFreq == 0)
+#endif
+ {
+#ifdef __HAL_RCC_GET_I2C5_SOURCE
+ switch (__HAL_RCC_GET_I2C5_SOURCE()) {
+#ifdef RCC_I2C5CLKSOURCE_HSI
+ case RCC_I2C5CLKSOURCE_HSI:
+ clkSrcFreq = HSI_VALUE;
+ break;
+#endif
+#ifdef RCC_I2C5CLKSOURCE_SYSCLK
+ case RCC_I2C5CLKSOURCE_SYSCLK:
+ clkSrcFreq = SystemCoreClock;
+ break;
+#endif
+#if defined(RCC_I2C5CLKSOURCE_PCLK1) || defined(RCC_I2C5CLKSOURCE_D2PCLK1)
+#ifdef RCC_I2C5CLKSOURCE_PCLK1
+ case RCC_I2C5CLKSOURCE_PCLK1:
+#endif
+#ifdef RCC_I2C5CLKSOURCE_D2PCLK1
+ case RCC_I2C5CLKSOURCE_D2PCLK1:
+#endif
+ clkSrcFreq = HAL_RCC_GetPCLK1Freq();
+ break;
+#endif
+#ifdef RCC_I2C5CLKSOURCE_CSI
+ case RCC_I2C5CLKSOURCE_CSI:
+ clkSrcFreq = CSI_VALUE;
+ break;
+#endif
+#ifdef RCC_I2C5CLKSOURCE_PLL3
+ case RCC_I2C5CLKSOURCE_PLL3:
+ HAL_RCCEx_GetPLL3ClockFreq(&PLL3_Clocks);
+ clkSrcFreq = PLL3_Clocks.PLL3_R_Frequency;
+ break;
#endif
+ default:
+ Error_Handler();
+ }
+#else
+ Error_Handler();
+#endif
+ }
}
#endif // I2C5_BASE
#if defined(I2C6_BASE)
@@ -431,7 +473,38 @@ static uint32_t i2c_getClkFreq(I2C_TypeDef *i2c)
#else
clkSrcFreq = HAL_RCCEx_GetPeriphCLKFreq(RCC_PERIPHCLK_I2C46);
#endif
+ if (clkSrcFreq == 0)
+#endif
+ {
+#ifdef __HAL_RCC_GET_I2C6_SOURCE
+ switch (__HAL_RCC_GET_I2C6_SOURCE()) {
+#ifdef RCC_I2C6CLKSOURCE_HSI
+ case RCC_I2C6CLKSOURCE_HSI:
+ clkSrcFreq = HSI_VALUE;
+ break;
+#endif
+#ifdef RCC_I2C6CLKSOURCE_SYSCLK
+ case RCC_I2C6CLKSOURCE_SYSCLK:
+ clkSrcFreq = SystemCoreClock;
+ break;
#endif
+#ifdef RCC_I2C6CLKSOURCE_PCLK1
+ case RCC_I2C6CLKSOURCE_PCLK1:
+ clkSrcFreq = HAL_RCC_GetPCLK1Freq();
+ break;
+#endif
+#ifdef RCC_I2C6CLKSOURCE_MSIK
+ case RCC_I2C6CLKSOURCE_MSIK:
+ clkSrcFreq = MSI_VALUE;
+ break;
+#endif
+ default:
+ Error_Handler();
+ }
+#else
+ Error_Handler();
+#endif
+ }
}
#endif // I2C6_BASE
return clkSrcFreq;
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