{"id":4347,"date":"2020-12-17T03:58:32","date_gmt":"2020-12-17T03:58:32","guid":{"rendered":"http:\/\/fastbitlab.com\/?p=4347"},"modified":"2023-09-06T17:23:27","modified_gmt":"2023-09-06T11:53:27","slug":"implementation-of-i2c-master-receive-data-api-part-2","status":"publish","type":"post","link":"https:\/\/fastbitlab.com\/blog\/implementation-of-i2c-master-receive-data-api-part-2\/","title":{"rendered":"STM32 I2C Lecture 32 : Implementation of I2C master receive data API: Part 2"},"content":{"rendered":"
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Implementation of I2C master receive data API: Part 2<\/span><\/h1>\n
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Procedure to read the data from slave when the length is greater than 1:<\/strong><\/span><\/p>\n

1. Clear the ADDR flag (Figure 1): The data reception begins only when you clear the ADDR flag.<\/span><\/p>\n

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Figure 1. Code to clear the ADDR flag.<\/span><\/figcaption><\/figure>\n

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2.Read the data until length becomes zero: Using for loop, read the data from the slave until the length becomes zero. To achieve this, you have to start reading data from i=Len to till i>0, as shown in Figure 2.<\/span><\/span><\/p>\n

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Figure 2. Code to read the data until the length becomes zero.<\/span><\/figcaption><\/figure>\n

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3. Wait until RXNE becomes 1 (Figure 3).<\/span><\/p>\n

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Figure 3. Code to wait until RXNE becomes 1.<\/span><\/figcaption><\/figure>\n

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4.Check if the last 2 bytes are remaining (if (i=2)): <\/span><\/p>\n