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feat(ulp): Allow usage oof ADC unit 2 on RISCV co processor

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This commit is contained in:
Guillaume Souchere
2025-09-22 12:38:37 +02:00
parent 4e082efc24
commit 1e0463673b
2 changed files with 12 additions and 11 deletions
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19
components/ulp/ulp_common/ulp_adc.c
View File

@@ -1,5 +1,5 @@
/* /*
* SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD * SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
* *
* SPDX-License-Identifier: Apache-2.0 * SPDX-License-Identifier: Apache-2.0
*/ */
@@ -15,38 +15,37 @@
#include "esp_private/adc_share_hw_ctrl.h" #include "esp_private/adc_share_hw_ctrl.h"
static const char *TAG = "ulp_adc"; static const char *TAG = "ulp_adc";
static adc_oneshot_unit_handle_t s_adc1_handle = NULL; static adc_oneshot_unit_handle_t s_adc_handle = NULL;
esp_err_t ulp_adc_init(const ulp_adc_cfg_t *cfg) esp_err_t ulp_adc_init(const ulp_adc_cfg_t *cfg)
{ {
esp_err_t ret = ESP_OK; esp_err_t ret = ESP_OK;
ESP_RETURN_ON_FALSE(cfg, ESP_ERR_INVALID_ARG, TAG, "cfg == NULL"); ESP_RETURN_ON_FALSE(cfg, ESP_ERR_INVALID_ARG, TAG, "cfg == NULL");
ESP_RETURN_ON_FALSE(cfg->adc_n == ADC_UNIT_1, ESP_ERR_INVALID_ARG, TAG, "Only ADC_UNIT_1 is supported for now");
//-------------ADC1 Init---------------// //-------------ADC1 Init---------------//
adc_oneshot_unit_init_cfg_t init_config1 = { adc_oneshot_unit_init_cfg_t init_config = {
.unit_id = cfg->adc_n, .unit_id = cfg->adc_n,
.ulp_mode = cfg->ulp_mode, .ulp_mode = cfg->ulp_mode,
}; };
if (init_config1.ulp_mode == ADC_ULP_MODE_DISABLE) { if (init_config.ulp_mode == ADC_ULP_MODE_DISABLE) {
/* Default to RISCV for backward compatibility */ /* Default to RISCV for backward compatibility */
ESP_LOGI(TAG, "No ulp mode specified in cfg struct, default to riscv"); ESP_LOGI(TAG, "No ulp mode specified in cfg struct, default to riscv");
init_config1.ulp_mode = ADC_ULP_MODE_RISCV; init_config.ulp_mode = ADC_ULP_MODE_RISCV;
} }
ret = adc_oneshot_new_unit(&init_config1, &s_adc1_handle); ret = adc_oneshot_new_unit(&init_config, &s_adc_handle);
if (ret != ESP_OK) { if (ret != ESP_OK) {
return ret; return ret;
} }
//-------------ADC1 Config---------------// //-------------ADC Config---------------//
adc_oneshot_chan_cfg_t config = { adc_oneshot_chan_cfg_t config = {
.bitwidth = cfg->width, .bitwidth = cfg->width,
.atten = cfg->atten, .atten = cfg->atten,
}; };
ret = adc_oneshot_config_channel(s_adc1_handle, cfg->channel, &config); ret = adc_oneshot_config_channel(s_adc_handle, cfg->channel, &config);
if (ret != ESP_OK) { if (ret != ESP_OK) {
return ret; return ret;
} }
@@ -62,5 +61,5 @@ esp_err_t ulp_adc_init(const ulp_adc_cfg_t *cfg)
esp_err_t ulp_adc_deinit(void) esp_err_t ulp_adc_deinit(void)
{ {
// No need to check for null-pointer and stuff, oneshot driver already does that // No need to check for null-pointer and stuff, oneshot driver already does that
return adc_oneshot_del_unit(s_adc1_handle); return adc_oneshot_del_unit(s_adc_handle);
} }

4
components/ulp/ulp_riscv/ulp_core/include/ulp_riscv_adc_ulp_core.h
View File

@@ -18,8 +18,10 @@ extern "C" {
* *
* @note Will block until the conversion is completed * @note Will block until the conversion is completed
* *
* @note ADC should be initilized for ULP by main CPU by calling ulp_riscv_adc_init() * @note ADC should be initialized for ULP by main CPU by calling ulp_riscv_adc_init()
* before calling this. * before calling this.
* @note When using ADC_UNIT_2, the caller must ensure that no other module (e.g., Wi-Fi or BT)
* is accessing the ADC, as conflicts may lead to undefined behavior.
* *
* @param adc_n ADC unit. * @param adc_n ADC unit.
* @param channel ADC channel number. * @param channel ADC channel number.