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Merge branch 'bugfix/onewire_internal_pullup' into 'master'

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fix(rmt): enable internal pull-up resistor for onewire bus

See merge request espressif/esp-idf!39928
This commit is contained in:
morris
2025-06-17 21:50:39 +08:00
parent 2f4c5d278e ceb7f1d827
commit 5f1ad2c18d
1 changed files with 3 additions and 3 deletions
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6
examples/peripherals/rmt/onewire/main/onewire_example_main.c
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@ -22,6 +22,9 @@ void app_main(void)
onewire_bus_handle_t bus; onewire_bus_handle_t bus;
onewire_bus_config_t bus_config = { onewire_bus_config_t bus_config = {
.bus_gpio_num = EXAMPLE_ONEWIRE_BUS_GPIO, .bus_gpio_num = EXAMPLE_ONEWIRE_BUS_GPIO,
.flags = {
.en_pull_up = true, // enable the internal pull-up resistor in case the external device didn't have one
}
}; };
onewire_bus_rmt_config_t rmt_config = { onewire_bus_rmt_config_t rmt_config = {
.max_rx_bytes = 10, // 1byte ROM command + 8byte ROM number + 1byte device command .max_rx_bytes = 10, // 1byte ROM command + 8byte ROM number + 1byte device command
@ -29,9 +32,6 @@ void app_main(void)
ESP_ERROR_CHECK(onewire_new_bus_rmt(&bus_config, &rmt_config, &bus)); ESP_ERROR_CHECK(onewire_new_bus_rmt(&bus_config, &rmt_config, &bus));
ESP_LOGI(TAG, "1-Wire bus installed on GPIO%d", EXAMPLE_ONEWIRE_BUS_GPIO); ESP_LOGI(TAG, "1-Wire bus installed on GPIO%d", EXAMPLE_ONEWIRE_BUS_GPIO);
// in case the external device didn't have a pull-up resistor, we also enable the internal pull-up resistor
ESP_ERROR_CHECK(gpio_pullup_en(EXAMPLE_ONEWIRE_BUS_GPIO));
int ds18b20_device_num = 0; int ds18b20_device_num = 0;
ds18b20_device_handle_t ds18b20s[EXAMPLE_ONEWIRE_MAX_DS18B20]; ds18b20_device_handle_t ds18b20s[EXAMPLE_ONEWIRE_MAX_DS18B20];
onewire_device_iter_handle_t iter = NULL; onewire_device_iter_handle_t iter = NULL;