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Fix I2C clock stretching issue with ESP32 (#5910)

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It was found that when I2C device is holding the clock LOW, ESP32 master is failing to wait for the clock to be released.

Fixes: #5875
Fixes: sparkfun/SparkFun_u-blox_GNSS_Arduino_Library#77
This commit is contained in:
Me No Dev
2021-11-19 18:43:59 +02:00
committed by GitHub
parent bd2be80b54
commit c9916c463f
2 changed files with 4 additions and 1 deletions
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2
cores/esp32/esp32-hal-i2c-slave.c
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@ -302,7 +302,7 @@ esp_err_t i2cSlaveInit(uint8_t num, int sda, int scl, uint16_t slaveID, uint32_t
i2c_ll_slave_init(i2c->dev);
i2c_ll_set_fifo_mode(i2c->dev, true);
i2c_ll_set_slave_addr(i2c->dev, slaveID, false);
i2c_ll_set_tout(i2c->dev, 32000);
i2c_ll_set_tout(i2c->dev, I2C_LL_MAX_TIMEOUT);
i2c_slave_set_frequency(i2c, frequency);
if (!i2c_slave_check_line_state(sda, scl)) {