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refactor(i2c): Add reset and clock control to i2c ll layer

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This commit is contained in:
Cao Sen Miao
2023-10-26 14:04:00 +08:00
committed by BOT
parent 5847ba0b9a
commit a44f8179de
15 changed files with 392 additions and 27 deletions
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46
components/hal/esp32/include/hal/i2c_ll.h
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@@ -13,6 +13,7 @@
#include "soc/i2c_periph.h"
#include "soc/i2c_struct.h"
#include "soc/clk_tree_defs.h"
#include "soc/dport_reg.h"
#include "hal/i2c_types.h"
#include "esp_attr.h"
#include "hal/assert.h"
@@ -709,6 +710,51 @@ static inline void i2c_ll_update(i2c_dev_t *hw)
;// ESP32 do not support
}
/**
* @brief Enable the bus clock for I2C module
*
* @param i2c_port I2C port id
* @param enable true to enable, false to disable
*/
static inline void i2c_ll_enable_bus_clock(int i2c_port, bool enable)
{
if (i2c_port == 0) {
uint32_t reg_val = DPORT_READ_PERI_REG(DPORT_PERIP_CLK_EN_REG);
reg_val &= ~DPORT_I2C_EXT0_CLK_EN;
reg_val |= enable << 7;
DPORT_WRITE_PERI_REG(DPORT_PERIP_CLK_EN_REG, reg_val);
} else if (i2c_port == 1) {
uint32_t reg_val = DPORT_READ_PERI_REG(DPORT_PERIP_CLK_EN_REG);
reg_val &= ~DPORT_I2C_EXT1_CLK_EN;
reg_val |= enable << 18;
DPORT_WRITE_PERI_REG(DPORT_PERIP_CLK_EN_REG, reg_val);
}
}
/// use a macro to wrap the function, force the caller to use it in a critical section
/// the critical section needs to declare the __DECLARE_RCC_ATOMIC_ENV variable in advance
#define i2c_ll_enable_bus_clock(...) do {(void)__DECLARE_RCC_ATOMIC_ENV; i2c_ll_enable_bus_clock(__VA_ARGS__);} while(0)
/**
* @brief Reset the I2C module
*
* @param i2c_port Group ID
*/
static inline void i2c_ll_reset_register(int i2c_port)
{
if (i2c_port == 0) {
DPORT_WRITE_PERI_REG(DPORT_PERIP_RST_EN_REG, DPORT_I2C_EXT0_RST);
DPORT_WRITE_PERI_REG(DPORT_PERIP_RST_EN_REG, 0);
} else if (i2c_port == 1) {
DPORT_WRITE_PERI_REG(DPORT_PERIP_RST_EN_REG, DPORT_I2C_EXT1_RST);
DPORT_WRITE_PERI_REG(DPORT_PERIP_RST_EN_REG, 0);
}
}
/// use a macro to wrap the function, force the caller to use it in a critical section
/// the critical section needs to declare the __DECLARE_RCC_ATOMIC_ENV variable in advance
#define i2c_ll_reset_register(...) do {(void)__DECLARE_RCC_ATOMIC_ENV; i2c_ll_reset_register(__VA_ARGS__);} while(0)
/**
* @brief Set whether slave should auto start, or only start with start signal from master
*