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fix(lp_i2c): Fixed an issue where the LP_I2C IO lines were not in open-drain mode

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This commit fixes an issue where in the LP I2C IO lines were not
initialized in open-drain mode.

Closes https://github.com/espressif/esp-idf/issues/12969
This commit is contained in:
Sudeep Mohanty 2024-01-26 11:12:25 +01:00
parent 7cbee80fb9
commit 300cd0c34f
1 changed files with 8 additions and 3 deletions
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11
components/ulp/lp_core/lp_core_i2c.c
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@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -47,8 +47,9 @@ static esp_err_t lp_i2c_configure_io(gpio_num_t io_num, bool pullup_en)
{
/* Initialize IO Pin */
ESP_RETURN_ON_ERROR(rtc_gpio_init(io_num), LPI2C_TAG, "LP GPIO Init failed for GPIO %d", io_num);
/* Set direction to input+output */
ESP_RETURN_ON_ERROR(rtc_gpio_set_direction(io_num, RTC_GPIO_MODE_INPUT_OUTPUT), LPI2C_TAG, "LP GPIO Set direction failed for %d", io_num);
/* Set direction to input+output open-drain mode */
ESP_RETURN_ON_ERROR(rtc_gpio_set_direction(io_num, RTC_GPIO_MODE_INPUT_OUTPUT_OD), LPI2C_TAG, "LP GPIO Set direction failed for %d", io_num);
/* Disable pulldown on the io pin */
ESP_RETURN_ON_ERROR(rtc_gpio_pulldown_dis(io_num), LPI2C_TAG, "LP GPIO pulldown disable failed for %d", io_num);
/* Enable pullup based on pullup_en flag */
@ -137,6 +138,10 @@ esp_err_t lp_core_i2c_master_init(i2c_port_t lp_i2c_num, const lp_core_i2c_cfg_t
/* Initialize LP I2C Master mode */
i2c_hal_master_init(&i2c_hal);
/* Enable internal open-drain mode for I2C IO lines */
i2c_hal.dev->ctr.sda_force_out = 0;
i2c_hal.dev->ctr.scl_force_out = 0;
/* Configure LP I2C clock and timing paramters */
ESP_RETURN_ON_ERROR(lp_i2c_config_clk(cfg), LPI2C_TAG, "Failed to configure LP I2C source clock");