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I2C: Fullfill the I2C clock tree, and support 26M XTAL on ESP32-C2

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This commit is contained in:
Cao Sen Miao
2022-07-14 19:22:07 +08:00
parent d1dc30fd70
commit 53580a62b5
16 changed files with 184 additions and 98 deletions
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12
components/hal/esp32c3/include/hal/i2c_ll.h
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@@ -14,6 +14,7 @@
#include "soc/i2c_struct.h"
#include "hal/i2c_types.h"
#include "soc/rtc_cntl_reg.h"
#include "soc/clk_tree_defs.h"
#include "esp_rom_sys.h"
#ifdef __cplusplus
@@ -86,8 +87,6 @@ typedef struct {
#define I2C_LL_SLAVE_TX_INT (I2C_TXFIFO_WM_INT_ENA_M)
// I2C slave RX interrupt bitmap
#define I2C_LL_SLAVE_RX_INT (I2C_RXFIFO_WM_INT_ENA_M | I2C_TRANS_COMPLETE_INT_ENA_M)
// I2C source clock
#define I2C_LL_CLK_SRC_FREQ(src_clk) (((src_clk) == I2C_SCLK_RTC) ? 20*1000*1000 : 40*1000*1000); // Another clock is XTAL clock
// delay time after rtc_clk swiching on
#define DELAY_RTC_CLK_SWITCH (5)
// I2C max timeout value
@@ -817,15 +816,10 @@ static inline void i2c_ll_master_clr_bus(i2c_dev_t *hw)
*
* @return None
*/
static inline void i2c_ll_set_source_clk(i2c_dev_t *hw, i2c_sclk_t src_clk)
static inline void i2c_ll_set_source_clk(i2c_dev_t *hw, i2c_clock_source_t src_clk)
{
// rtc_clk needs to switch on.
if (src_clk == I2C_SCLK_RTC) {
SET_PERI_REG_MASK(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_DIG_CLK8M_EN_M);
esp_rom_delay_us(DELAY_RTC_CLK_SWITCH);
}
// src_clk : (1) for RTC_CLK, (0) for XTAL
hw->clk_conf.sclk_sel = (src_clk == I2C_SCLK_RTC) ? 1 : 0;
hw->clk_conf.sclk_sel = (src_clk == I2C_CLK_SRC_RC_FAST) ? 1 : 0;
}
/**