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jerpelea pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/nuttx.git
commit 06ef4a8084aaedec63f2df65940cd9c9a940922c
Author: Eren Terzioglu <eren.terzio...@espressif.com>
AuthorDate: Wed Feb 26 09:18:51 2025 +0100
boards/xtensa/esp32[s2|s3]: Add I2C slave support
Add I2C slave board support for Xtensa based Espressif devices
Signed-off-by: Eren Terzioglu <eren.terzio...@espressif.com>
---
.../esp32s2-saola-1/src/esp32s2_board_i2c.c | 11 +++--
.../xtensa/esp32s3/common/src/esp32s3_board_i2c.c | 54 ++++++++++++++++++++--
2 files changed, 55 insertions(+), 10 deletions(-)
diff --git a/boards/xtensa/esp32s2/esp32s2-saola-1/src/esp32s2_board_i2c.c
b/boards/xtensa/esp32s2/esp32s2-saola-1/src/esp32s2_board_i2c.c
index 395f3a73c9..37e909b3f6 100644
--- a/boards/xtensa/esp32s2/esp32s2-saola-1/src/esp32s2_board_i2c.c
+++ b/boards/xtensa/esp32s2/esp32s2-saola-1/src/esp32s2_board_i2c.c
@@ -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;
}
-
diff --git a/boards/xtensa/esp32s3/common/src/esp32s3_board_i2c.c
b/boards/xtensa/esp32s3/common/src/esp32s3_board_i2c.c
index 52091caa5e..290c14ff01 100644
--- a/boards/xtensa/esp32s3/common/src/esp32s3_board_i2c.c
+++ b/boards/xtensa/esp32s3/common/src/esp32s3_board_i2c.c
@@ -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
