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boards/xtensa/esp32[s2|s3]: Add I2C slave support

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Add I2C slave board support for Xtensa based Espressif devices

Signed-off-by: Eren Terzioglu <eren.terzioglu@espressif.com>
This commit is contained in:
Eren Terzioglu
2025-02-26 09:18:51 +01:00
committed by Alin Jerpelea
parent 4d89d7186e
commit 06ef4a8084
2 changed files with 55 additions and 10 deletions
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boards/xtensa/esp32s2/esp32s2-saola-1/src/esp32s2_board_i2c.c
+6 -5
View File
@@ -77,19 +77,20 @@ int board_i2c_init(void)
{
int ret = OK;
#ifdef CONFIG_ESP32S2_I2C0
#ifdef CONFIG_ESPRESSIF_I2C_PERIPH_MASTER_MODE
# ifdef CONFIG_ESP32S2_I2C0_MASTER_MODE
ret = i2c_driver_init(ESP32S2_I2C0);
if (ret != OK)
{
goto done;
}
#endif
# endif
#ifdef CONFIG_ESP32S2_I2C1
# ifdef CONFIG_ESP32S2_I2C1_MASTER_MODE
ret = i2c_driver_init(ESP32S2_I2C1);
#endif
# endif
#endif /* #ifdef CONFIG_ESPRESSIF_I2C_PERIPH_MASTER_MODE */
done:
return ret;
}
boards/xtensa/esp32s3/common/src/esp32s3_board_i2c.c
+49 -5
View File
@@ -35,9 +35,21 @@
#ifdef CONFIG_ESPRESSIF_I2C_BITBANG
#include "espressif/esp_i2c_bitbang.h"
#endif
#ifdef CONFIG_ESPRESSIF_I2C_PERIPH
#ifdef CONFIG_ESPRESSIF_I2C_PERIPH_MASTER_MODE
#include "esp32s3_i2c.h"
#endif
#ifdef CONFIG_ESPRESSIF_I2C_PERIPH_SLAVE_MODE
#include "espressif/esp_i2c_slave.h"
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifdef CONFIG_ESPRESSIF_I2C_PERIPH_SLAVE_MODE
#define I2C0_SLAVE_ADDR 0x28
#define I2C0_SLAVE_NBITS 7
#endif
/****************************************************************************
* Public Functions
@@ -66,7 +78,7 @@ static int i2c_bitbang_driver_init(int bus)
}
#endif
#ifdef CONFIG_ESPRESSIF_I2C_PERIPH
#ifdef CONFIG_ESPRESSIF_I2C_PERIPH_MASTER_MODE
static int i2c_driver_init(int bus)
{
struct i2c_master_s *i2c;
@@ -90,6 +102,30 @@ static int i2c_driver_init(int bus)
}
#endif
#ifdef CONFIG_ESPRESSIF_I2C_PERIPH_SLAVE_MODE
static int i2c_slave_driver_init(int bus, int addr)
{
struct i2c_slave_s *i2c;
int ret;
i2c = esp_i2cbus_slave_initialize(bus, addr);
if (i2c == NULL)
{
i2cerr("Failed to get I2C%d interface\n", bus);
return -ENODEV;
}
ret = i2c_slave_register(i2c, bus, addr, I2C0_SLAVE_NBITS);
if (ret < 0)
{
i2cerr("Failed to register I2C%d driver: %d\n", bus, ret);
esp_i2cbus_slave_uninitialize(i2c);
}
return ret;
}
#endif
/****************************************************************************
* Name: board_i2c_init
*
@@ -106,22 +142,30 @@ int board_i2c_init(void)
{
int ret = OK;
#ifdef CONFIG_ESP32S3_I2C0
#ifdef CONFIG_ESPRESSIF_I2C_PERIPH_MASTER_MODE
# ifdef CONFIG_ESP32S3_I2C0_MASTER_MODE
ret = i2c_driver_init(ESP32S3_I2C0);
if (ret != OK)
{
goto done;
}
#endif
# endif
#ifdef CONFIG_ESP32S3_I2C1
# ifdef CONFIG_ESP32S3_I2C1_MASTER_MODE
ret = i2c_driver_init(ESP32S3_I2C1);
# endif
#endif
#ifdef CONFIG_ESPRESSIF_I2C_BITBANG
ret = i2c_bitbang_driver_init(ESPRESSIF_I2C_BITBANG);
#endif
#ifdef CONFIG_ESPRESSIF_I2C_PERIPH_SLAVE_MODE
# ifdef CONFIG_ESP32S3_I2C0_SLAVE_MODE
ret = i2c_slave_driver_init(ESPRESSIF_I2C0_SLAVE, I2C0_SLAVE_ADDR);
#endif
#endif
#ifdef CONFIG_ESP32S3_I2C0
done:
#endif