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I2C: Fix SCL period timings on ESP targets

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The output frequency is now more accurate as the SCL period timings have been fixed.
This fix applies for ESP32, ESP32S3, ESP32C3, ESP32C2 and ESP32H2
This commit is contained in:
Omar Chebib
2022-05-05 14:43:36 +08:00
parent 0adb814af3
commit 477bc9e64c
6 changed files with 68 additions and 73 deletions
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14
components/hal/esp32c2/include/hal/i2c_ll.h
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@@ -147,17 +147,17 @@ static inline void i2c_ll_set_bus_timing(i2c_dev_t *hw, i2c_clk_cal_t *bus_cfg)
{
HAL_FORCE_MODIFY_U32_REG_FIELD(hw->clk_conf, sclk_div_num, bus_cfg->clkm_div - 1);
//scl period
hw->scl_low_period.scl_low_period = bus_cfg->scl_low - 1;
hw->scl_high_period.scl_high_period = bus_cfg->scl_high;
hw->scl_low_period.scl_low_period = bus_cfg->scl_low - 2;
hw->scl_high_period.scl_high_period = bus_cfg->scl_high - 3;
//sda sample
hw->sda_hold.sda_hold_time = bus_cfg->sda_hold;
hw->sda_sample.sda_sample_time = bus_cfg->sda_sample;
hw->sda_hold.sda_hold_time = bus_cfg->sda_hold - 1;
hw->sda_sample.sda_sample_time = bus_cfg->sda_sample - 1;
//setup
hw->scl_rstart_setup.scl_rstart_setup_time = bus_cfg->setup;
hw->scl_stop_setup.scl_stop_setup_time = bus_cfg->setup;
hw->scl_rstart_setup.scl_rstart_setup_time = bus_cfg->setup - 1;
hw->scl_stop_setup.scl_stop_setup_time = bus_cfg->setup - 1;
//hold
hw->scl_start_hold.scl_start_hold_time = bus_cfg->hold - 1;
hw->scl_stop_hold.scl_stop_hold_time = bus_cfg->hold;
hw->scl_stop_hold.scl_stop_hold_time = bus_cfg->hold - 1;
hw->to.time_out_value = bus_cfg->tout;
hw->to.time_out_en = 1;
}