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feat(i2c_slave): Add new implementation and API for I2C slave

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This commit is contained in:
Cao Sen Miao
2023-10-24 18:44:49 +08:00
parent ca32e5268b
commit 8d639492f2
27 changed files with 1046 additions and 141 deletions
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44
components/hal/esp32s2/include/hal/i2c_ll.h
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@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -44,24 +44,29 @@ typedef union {
#define I2C_LL_CMD_END 4 /*!<I2C end command */
typedef enum {
I2C_LL_INTR_TXFIFO_WM = (1 << 1),
I2C_LL_INTR_RXFIFO_WM = (1 << 0),
I2C_INTR_MST_TXFIFO_WM = (1 << 1),
I2C_INTR_MST_RXFIFO_WM = (1 << 0),
I2C_LL_INTR_NACK = (1 << 10),
I2C_LL_INTR_TIMEOUT = (1 << 8),
I2C_LL_INTR_MST_COMPLETE = (1 << 7),
I2C_LL_INTR_ARBITRATION = (1 << 5),
I2C_LL_INTR_END_DETECT = (1 << 3),
I2C_LL_INTR_ST_TO = (1 << 13),
I2C_LL_INTR_START = (1 << 15),
I2C_LL_INTR_STRETCH = (1 << 16),
I2C_LL_INTR_UNMATCH = (1 << 18),
} i2c_ll_intr_t;
} i2c_ll_master_intr_t;
typedef enum {
I2C_INTR_SLV_TXFIFO_WM = (1 << 1),
I2C_INTR_SLV_RXFIFO_WM = (1 << 0),
I2C_INTR_SLV_COMPLETE = (1 << 7),
I2C_INTR_START = (1 << 15),
I2C_INTR_STRETCH = (1 << 16),
} i2c_ll_slave_intr_t;
// Get the I2C hardware instance
#define I2C_LL_GET_HW(i2c_num) (((i2c_num) == 0) ? &I2C0 : &I2C1)
#define I2C_LL_MASTER_EVENT_INTR (I2C_NACK_INT_ENA_M|I2C_TIME_OUT_INT_ENA_M|I2C_TRANS_COMPLETE_INT_ENA_M|I2C_ARBITRATION_LOST_INT_ENA_M|I2C_END_DETECT_INT_ENA_M)
#define I2C_LL_SLAVE_EVENT_INTR (I2C_TRANS_COMPLETE_INT_ENA_M|I2C_TXFIFO_WM_INT_ENA_M|I2C_SLAVE_STRETCH_INT_ENA_M)
#define I2C_LL_SLAVE_RX_EVENT_INTR (I2C_TRANS_COMPLETE_INT_ENA_M | I2C_SLAVE_STRETCH_INT_ENA_M)
#define I2C_LL_SLAVE_EVENT_INTR (I2C_TRANS_COMPLETE_INT_ENA_M|I2C_TXFIFO_WM_INT_ENA_M|I2C_RXFIFO_WM_INT_ENA_M | I2C_SLAVE_STRETCH_INT_ENA_M)
#define I2C_LL_SLAVE_RX_EVENT_INTR (I2C_TRANS_COMPLETE_INT_ENA_M | I2C_RXFIFO_WM_INT_ENA_M | I2C_SLAVE_STRETCH_INT_ENA_M)
#define I2C_LL_SLAVE_TX_EVENT_INTR (I2C_TXFIFO_WM_INT_ENA_M)
#define I2C_LL_RESET_SLV_SCL_PULSE_NUM_DEFAULT (9)
@@ -252,6 +257,20 @@ static inline void i2c_ll_slave_broadcast_enable(i2c_dev_t *hw, bool broadcast_e
// Not supported on esp32s2
}
/**
* @brief Get the cause of SCL clock stretching in slave mode
*
* @param hw Beginning address of the peripheral registers
* @param stretch_cause Pointer to stretch cause in the slave mode.
*
* @return None
*/
__attribute__((always_inline))
static inline void i2c_ll_slave_get_stretch_cause(i2c_dev_t *hw, i2c_slave_stretch_cause_t *stretch_cause)
{
// Not supported on esp32s2
}
/**
* @brief Configure I2C slave address
*
@@ -265,9 +284,9 @@ static inline void i2c_ll_set_slave_addr(i2c_dev_t *hw, uint16_t slave_addr, boo
{
hw->slave_addr.en_10bit = addr_10bit_en;
if (addr_10bit_en) {
uint8_t addr_14_7 = (slave_addr & 0xff) << 7;
uint8_t addr_6_0 = ((slave_addr & 0x300) >> 8) || 0x78;
hw->slave_addr.addr = addr_14_7 || addr_6_0;
uint16_t addr_14_7 = (slave_addr & 0xff) << 7;
uint8_t addr_6_0 = ((slave_addr & 0x300) >> 8) | 0x78;
hw->slave_addr.addr = addr_14_7 | addr_6_0;
} else {
hw->slave_addr.addr = slave_addr;
}
@@ -356,6 +375,7 @@ static inline void i2c_ll_set_txfifo_empty_thr(i2c_dev_t *hw, uint8_t empty_thr)
*/
static inline void i2c_ll_set_rxfifo_full_thr(i2c_dev_t *hw, uint8_t full_thr)
{
hw->fifo_conf.fifo_prt_en = 1;
hw->fifo_conf.rx_fifo_wm_thrhd = full_thr;
}