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I2C: Make I2C clock frequency accurate

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This commit is contained in:
Cao Sen Miao
2022-06-27 12:00:04 +08:00
parent cf41c255bb
commit e218723e0e
11 changed files with 293 additions and 50 deletions
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6
components/driver/i2c.c
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@@ -635,14 +635,14 @@ static esp_err_t i2c_hw_fsm_reset(i2c_port_t i2c_num)
// A workaround for avoiding cause timeout issue when using
// hardware reset.
#if !SOC_I2C_SUPPORT_HW_FSM_RST
int scl_low_period, scl_high_period;
int scl_low_period, scl_high_period, scl_wait_high_period;
int scl_start_hold, scl_rstart_setup;
int scl_stop_hold, scl_stop_setup;
int sda_hold, sda_sample;
int timeout;
uint8_t filter_cfg;
i2c_hal_get_scl_timing(&(i2c_context[i2c_num].hal), &scl_high_period, &scl_low_period);
i2c_hal_get_scl_clk_timing(&(i2c_context[i2c_num].hal), &scl_high_period, &scl_low_period, &scl_wait_high_period);
i2c_hal_get_start_timing(&(i2c_context[i2c_num].hal), &scl_rstart_setup, &scl_start_hold);
i2c_hal_get_stop_timing(&(i2c_context[i2c_num].hal), &scl_stop_setup, &scl_stop_hold);
i2c_hal_get_sda_timing(&(i2c_context[i2c_num].hal), &sda_sample, &sda_hold);
@@ -657,7 +657,7 @@ static esp_err_t i2c_hw_fsm_reset(i2c_port_t i2c_num)
i2c_hal_master_init(&(i2c_context[i2c_num].hal), i2c_num);
i2c_hal_disable_intr_mask(&(i2c_context[i2c_num].hal), I2C_LL_INTR_MASK);
i2c_hal_clr_intsts_mask(&(i2c_context[i2c_num].hal), I2C_LL_INTR_MASK);
i2c_hal_set_scl_timing(&(i2c_context[i2c_num].hal), scl_high_period, scl_low_period);
i2c_hal_set_scl_clk_timing(&(i2c_context[i2c_num].hal), scl_high_period, scl_low_period, scl_wait_high_period);
i2c_hal_set_start_timing(&(i2c_context[i2c_num].hal), scl_rstart_setup, scl_start_hold);
i2c_hal_set_stop_timing(&(i2c_context[i2c_num].hal), scl_stop_setup, scl_stop_hold);
i2c_hal_set_sda_timing(&(i2c_context[i2c_num].hal), sda_sample, sda_hold);