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fix(i2c_slave): filter out fake request for esp32

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Closes https://github.com/espressif/esp-idf/issues/18268
This commit is contained in:
Chen Chen
2026-03-03 16:14:05 +08:00
parent 92b011198b
commit c3e0a746c8
4 changed files with 24 additions and 2 deletions
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components/esp_driver_i2c/i2c_slave_v2.c
+1 -1
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@@ -183,7 +183,7 @@ IRAM_ATTR static void i2c_slave_isr_handler(void *arg)
if (slave_rw == I2C_SLAVE_READ_BY_MASTER) {
#if !SOC_I2C_SLAVE_CAN_GET_STRETCH_CAUSE
i2c_slave_request_event_data_t evt_data = {};
if (i2c_slave->request_callback) {
if (i2c_slave->request_callback && i2c_ll_slave_wait_ack(hal->dev)) {
pxHigherPriorityTaskWoken |= i2c_slave->request_callback(i2c_slave, &evt_data, i2c_slave->user_ctx);
}
#endif
components/hal/esp32/include/hal/i2c_ll.h
+13 -1
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@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2026 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -875,6 +875,18 @@ static inline i2c_slave_read_write_status_t i2c_ll_slave_get_read_write_status(i
return (hw->status_reg.slave_rw == 0) ? I2C_SLAVE_WRITE_BY_MASTER : I2C_SLAVE_READ_BY_MASTER;
}
/**
* @brief Check whether the slave is waiting for ACK
*
* @param hw Beginning address of the peripheral registers
* @return true if this slave is waiting for ACK, false otherwise
*/
__attribute__((always_inline))
static inline bool i2c_ll_slave_wait_ack(i2c_dev_t *hw)
{
return hw->status_reg.scl_main_state_last == 6;
}
//////////////////////////////////////////Deprecated Functions//////////////////////////////////////////////////////////
/////////////////////////////The following functions are only used by the legacy driver/////////////////////////////////
/////////////////////////////They might be removed in the next major release (ESP-IDF 6.0)//////////////////////////////