I2C dispose fix #3121
I2C dispose fix #3121
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Automated fixes for code style.
WalkthroughThe changes update the data type of the Changes
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🧹 Nitpick comments (1)
targets/ESP32/_nanoCLR/System.Device.I2c/sys_dev_i2c_native_System_Device_I2c_I2cDevice.cpp (1)
121-128: Add bounds check in disposal logic.The disposal logic should validate that the counter is positive before decrementing to prevent potential underflow issues.
- Esp_I2C_Initialised_Flag[bus]--; + if (Esp_I2C_Initialised_Flag[bus] > 0) + { + Esp_I2C_Initialised_Flag[bus]--; + } if (Esp_I2C_Initialised_Flag[bus] <= 0) { i2c_driver_delete(bus); Esp_I2C_Initialised_Flag[bus] = 0; }
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targets/ESP32/_include/targetPAL_I2c.h(1 hunks)targets/ESP32/_nanoCLR/System.Device.I2c/sys_dev_i2c_native_System_Device_I2c_I2cDevice.cpp(2 hunks)targets/ESP32/_nanoCLR/targetPAL_I2c.cpp(1 hunks)
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🔇 Additional comments (3)
targets/ESP32/_include/targetPAL_I2c.h (1)
13-13: LGTM! The data type change improves robustness.The change from
uint8_ttoint16_tforEsp_I2C_Initialised_Flagprovides a much wider range for tracking I2C device initialization counts, which helps prevent potential overflow issues and allows for better detection of mismatched init/dispose calls.targets/ESP32/_nanoCLR/targetPAL_I2c.cpp (1)
10-16: LGTM! Implementation is consistent with the header.The data type change to
int16_tis properly implemented while maintaining the same initialization logic and cleanup behavior.targets/ESP32/_nanoCLR/System.Device.I2c/sys_dev_i2c_native_System_Device_I2c_I2cDevice.cpp (1)
97-98: LGTM! Fixed device initialization tracking.Moving the increment operation outside the initialization block ensures accurate tracking of I2C device instances, fixing the issue where devices weren't being properly counted.
…4-3f35-45df-9084-25272177a879' into I2C-fix
josesimoes
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Series: ESP32
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Description
When creating and disposing a number of I2CDevice objects the driver was disposed wrongly due to error in code counting open devices.
This fixes the counter logic.
The scan example should be changed to dispose I2CDevice objects otherwise memory is filled with unused objects until GC runs.
Other code should do the same when I2CDevcie is no longer in use.
Motivation and Context
How Has This Been Tested?
Tested with I2C scan program
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