commit 1819e8b3afa5d9e933811119ea554824fec388b5
author Tasnim <tasnim.ouni@st.com> Fri Jul 07 11:12:49 2023 +0100
committer Tasnim <tasnim.ouni@st.com> Fri Jul 07 11:15:33 2023 +0100
tree 8e7036d2eadf252fe7600b1a2495831ed0c41f5b
parent e0c69e16fc5792c3fe38b9fc3e13197f1945af74

[HAL][I2C] Update I2C_Slave_ISR_IT, I2C_Slave_ISR_DMA and I2C_ITSlaveCplt to prevent the call of HAL_I2C_ListenCpltCallback twice

Src/stm32h7xx_hal_i2c.c

diff --git a/Src/stm32h7xx_hal_i2c.c b/Src/stm32h7xx_hal_i2c.c
index 7e7f32b..37ce0fe 100644
--- a/Src/stm32h7xx_hal_i2c.c
+++ b/Src/stm32h7xx_hal_i2c.c
@@ -5206,9 +5206,8 @@
     /* Call I2C Slave complete process */
     I2C_ITSlaveCplt(hi2c, tmpITFlags);
   }
-
-  if ((I2C_CHECK_FLAG(tmpITFlags, I2C_FLAG_AF) != RESET) && \
-      (I2C_CHECK_IT_SOURCE(ITSources, I2C_IT_NACKI) != RESET))
+  else if ((I2C_CHECK_FLAG(tmpITFlags, I2C_FLAG_AF) != RESET) && \
+           (I2C_CHECK_IT_SOURCE(ITSources, I2C_IT_NACKI) != RESET))
   {
     /* Check that I2C transfer finished */
     /* if yes, normal use case, a NACK is sent by the MASTER when Transfer is finished */
@@ -5627,9 +5626,8 @@
     /* Call I2C Slave complete process */
     I2C_ITSlaveCplt(hi2c, ITFlags);
   }
-
-  if ((I2C_CHECK_FLAG(ITFlags, I2C_FLAG_AF) != RESET) && \
-      (I2C_CHECK_IT_SOURCE(ITSources, I2C_IT_NACKI) != RESET))
+  else if ((I2C_CHECK_FLAG(ITFlags, I2C_FLAG_AF) != RESET) && \
+           (I2C_CHECK_IT_SOURCE(ITSources, I2C_IT_NACKI) != RESET))
   {
     /* Check that I2C transfer finished */
     /* if yes, normal use case, a NACK is sent by the MASTER when Transfer is finished */
@@ -6228,6 +6226,7 @@
 {
   uint32_t tmpcr1value = READ_REG(hi2c->Instance->CR1);
   uint32_t tmpITFlags = ITFlags;
+  uint32_t tmpoptions = hi2c->XferOptions;
   HAL_I2C_StateTypeDef tmpstate = hi2c->State;
 
   /* Clear STOP Flag */
@@ -6310,6 +6309,57 @@
     hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
   }
 
+  if ((I2C_CHECK_FLAG(tmpITFlags, I2C_FLAG_AF) != RESET) && \
+      (I2C_CHECK_IT_SOURCE(tmpcr1value, I2C_IT_NACKI) != RESET))
+  {
+    /* Check that I2C transfer finished */
+    /* if yes, normal use case, a NACK is sent by the MASTER when Transfer is finished */
+    /* Mean XferCount == 0*/
+    /* So clear Flag NACKF only */
+    if (hi2c->XferCount == 0U)
+    {
+      if ((hi2c->State == HAL_I2C_STATE_LISTEN) && (tmpoptions == I2C_FIRST_AND_LAST_FRAME))
+        /* Same action must be done for (tmpoptions == I2C_LAST_FRAME) which removed for
+           Warning[Pa134]: left and right operands are identical */
+      {
+        /* Call I2C Listen complete process */
+        I2C_ITListenCplt(hi2c, tmpITFlags);
+      }
+      else if ((hi2c->State == HAL_I2C_STATE_BUSY_TX_LISTEN) && (tmpoptions != I2C_NO_OPTION_FRAME))
+      {
+        /* Clear NACK Flag */
+        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);
+
+        /* Flush TX register */
+        I2C_Flush_TXDR(hi2c);
+
+        /* Last Byte is Transmitted */
+        /* Call I2C Slave Sequential complete process */
+        I2C_ITSlaveSeqCplt(hi2c);
+      }
+      else
+      {
+        /* Clear NACK Flag */
+        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);
+      }
+    }
+    else
+    {
+      /* if no, error use case, a Non-Acknowledge of last Data is generated by the MASTER*/
+      /* Clear NACK Flag */
+      __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);
+
+      /* Set ErrorCode corresponding to a Non-Acknowledge */
+      hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
+
+      if ((tmpoptions == I2C_FIRST_FRAME) || (tmpoptions == I2C_NEXT_FRAME))
+      {
+        /* Call the corresponding callback to inform upper layer of End of Transfer */
+        I2C_ITError(hi2c, hi2c->ErrorCode);
+      }
+    }
+  }
+
   hi2c->Mode = HAL_I2C_MODE_NONE;
   hi2c->XferISR = NULL;