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fix(lp_i2c): Fixed a bug where the LP_I2C did not send NACK for 16-byte reads

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This commit updates the LP_I2C driver used by the LP CPU wherein the
driver did not send out a NACK when we do a read of multiple of the FIFO
depth bytes. This was because the LP I2C controller was configured to
send an ACK when the Rx FIFO reaches the threshold instead of a NACK.
This commit updates the behavior.
This commit is contained in:
Sudeep Mohanty
2023-08-07 10:43:16 +02:00
committed by BOT
parent 5b46ef3cdd
commit 00955f7e59
2 changed files with 17 additions and 0 deletions
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3
components/ulp/lp_core/lp_core_i2c.c
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@@ -143,6 +143,9 @@ esp_err_t lp_core_i2c_master_init(i2c_port_t lp_i2c_num, const lp_core_i2c_cfg_t
/* Enable SDA and SCL filtering. This configuration matches the HP I2C filter config */
i2c_ll_set_filter(i2c_hal.dev, LP_I2C_FILTER_CYC_NUM_DEF);
/* Configure the I2C master to send a NACK when the Rx FIFO count is full */
i2c_ll_master_rx_full_ack_level(i2c_hal.dev, 1);
/* Synchronize the config register values to the LP I2C peripheral clock */
i2c_ll_update(i2c_hal.dev);