commit c8ac649fec59946f0ca9c02c5dffca944079f72d
author Ali Labbene <ali.labbene@st.com> Mon Oct 23 11:15:53 2023 +0100
committer Ali Labbene <ali.labbene@st.com> Mon Oct 23 11:20:21 2023 +0100
tree 8a395b2277906417b25c902e3af4def6cc314aa5
parent 918c1410a0b78afbb551429348282a9dfef6310a

[HAL][I2C] Update HAL_I2C_Mem_Read() to clear ACK bit once 3 bytes to read remain to be able to send the NACK once the transfer ends

Src/stm32l1xx_hal_i2c.c

diff --git a/Src/stm32l1xx_hal_i2c.c b/Src/stm32l1xx_hal_i2c.c
index 3fd7631..2f8da76 100644
--- a/Src/stm32l1xx_hal_i2c.c
+++ b/Src/stm32l1xx_hal_i2c.c
@@ -2823,6 +2823,11 @@
 
         if (__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET)
         {
+          if (hi2c->XferSize == 3U)
+          {
+            /* Disable Acknowledge */
+            CLEAR_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
+          }
           /* Read data from DR */
           *hi2c->pBuffPtr = (uint8_t)hi2c->Instance->DR;