{"id":4500,"date":"2020-12-23T06:38:52","date_gmt":"2020-12-23T06:38:52","guid":{"rendered":"http:\/\/fastbitlab.com\/?p=4500"},"modified":"2023-09-07T16:01:56","modified_gmt":"2023-09-07T10:31:56","slug":"stm32-i2c-lecture-39-i2c-errors-and-importance-of-busy-flag","status":"publish","type":"post","link":"https:\/\/fastbitlab.com\/blog\/stm32-i2c-lecture-39-i2c-errors-and-importance-of-busy-flag\/","title":{"rendered":"STM32 I2C Lecture 39 : I2C errors and importance of BUSY flag"},"content":{"rendered":"
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I2C errors and importance of BUSY flag<\/strong><\/span><\/h1>\n
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Understand different types of errors that may occur during I2C communication.<\/span><\/div>\n
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I2C Error Types<\/strong><\/span><\/p>\n

Bus error:<\/span> <\/strong><\/span><\/p>\n

This error happens when the interface detects an SDA’s rising or falling edge while SCL is high, occurring in a non-valid position during a byte transfer. <\/span><\/span><\/p>\n

During the byte transfer, if any invalid transition happens on the SDA line, then the bus error is triggered, and the bus error flag in the status register will be set, and if the interrupt is enabled, then an interrupt will be triggered on the interrupt IRQ line.<\/span><\/span><\/p>\n

Arbitration loss error:<\/strong><\/span> <\/span><\/span><\/p>\n

This error can occur when the interface loses the arbitration of the bus to another master. Basically, arbitration loss error may happen only in the multi-master bus configuration. The circuit having multiple masters is known as multi-master configuration.<\/span><\/span><\/p>\n

ACK failure error: <\/b><\/span><\/span><\/p>\n

This error occurs when no ACK is returned for the byte sent.<\/span><\/span><\/p>\n

Overrun error:<\/b><\/span><\/p>\n