diff options
Diffstat (limited to 'ports/esp32/machine_i2c.c')
| -rw-r--r-- | ports/esp32/machine_i2c.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/ports/esp32/machine_i2c.c b/ports/esp32/machine_i2c.c index 74679d01d..9fb89660f 100644 --- a/ports/esp32/machine_i2c.c +++ b/ports/esp32/machine_i2c.c @@ -35,6 +35,7 @@ #include "driver/i2c_master.h" #else #include "driver/i2c.h" +#include "esp_clk_tree.h" #include "hal/i2c_ll.h" #endif @@ -224,6 +225,8 @@ int machine_hw_i2c_transfer(mp_obj_base_t *self_in, uint16_t addr, size_t n, mp_ #if SOC_I2C_SUPPORT_XTAL #if CONFIG_XTAL_FREQ > 0 #define I2C_SCLK_FREQ (CONFIG_XTAL_FREQ * 1000000) +#elif CONFIG_XTAL_FREQ == 0 && CONFIG_IDF_TARGET_ESP32C5 +// The crystal is auto-detected, so the I2C sclk frequency will be computed at runtime. #else #error "I2C uses XTAL but no configured freq" #endif // CONFIG_XTAL_FREQ @@ -257,7 +260,13 @@ static void machine_hw_i2c_init(machine_hw_i2c_obj_t *self, bool first_init) { .master.clk_speed = self->freq, }; i2c_param_config(self->port, &conf); - int timeout = i2c_ll_calculate_timeout_us_to_reg_val(I2C_SCLK_FREQ, self->timeout_us); + #if CONFIG_IDF_TARGET_ESP32C5 + uint32_t i2c_sclk_freq; + check_esp_err(esp_clk_tree_src_get_freq_hz(I2C_CLK_SRC_DEFAULT, ESP_CLK_TREE_SRC_FREQ_PRECISION_APPROX, &i2c_sclk_freq)); + #else + uint32_t i2c_sclk_freq = I2C_SCLK_FREQ; + #endif + int timeout = i2c_ll_calculate_timeout_us_to_reg_val(i2c_sclk_freq, self->timeout_us); i2c_set_timeout(self->port, (timeout > I2C_LL_MAX_TIMEOUT) ? I2C_LL_MAX_TIMEOUT : timeout); i2c_driver_install(self->port, I2C_MODE_MASTER, 0, 0, 0); } |