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esp-idf/components/driver/pcnt.c

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driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
2016-11-21 05:17:07 -05:00
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "esp_log.h"
Add interrupt allocation scheme / interrupt sharing. Also modifies drivers and examples. Also allows interrupts to be marked specifically as having a handler that's all in IRAM.
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#include "esp_intr_alloc.h"
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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#include "driver/pcnt.h"
#include "driver/periph_ctrl.h"
#define PCNT_CHANNEL_ERR_STR "PCNT CHANNEL ERROR"
#define PCNT_UNIT_ERR_STR "PCNT UNIT ERROR"
#define PCNT_GPIO_ERR_STR "PCNT GPIO NUM ERROR"
#define PCNT_ADDRESS_ERR_STR "PCNT ADDRESS ERROR"
#define PCNT_PARAM_ERR_STR "PCNT PARAM ERROR"
#define PCNT_COUNT_MODE_ERR_STR "PCNT COUNTER MODE ERROR"
#define PCNT_CTRL_MODE_ERR_STR "PCNT CTRL MODE ERROR"
driver: PCNT minor changes
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#define PCNT_EVT_TYPE_ERR_STR "PCNT value type error"
Add some comments in pcnt.h.
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#define PCNT_LIMT_VAL_ERR_STR "PCNT limit value error"
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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driver(pcnt): Add some APIs to support each unit can have it's own interrupt handler.
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#define PCNT_ENTER_CRITICAL(mux) portENTER_CRITICAL(mux)
#define PCNT_EXIT_CRITICAL(mux) portEXIT_CRITICAL(mux)
drivers: remove file paths from log statements Function name and error string are usually sufficient to find the place which has triggered an error. __FILE__ macro generates a string which has absolute file name (with our build system), so there is a lot of long strings present in the program because of that. Fixes https://github.com/espressif/esp-idf/issues/126
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#define PCNT_CHECK(a, str, ret_val) \
if (!(a)) { \
ESP_LOGE(PCNT_TAG,"%s(%d): %s", __FUNCTION__, __LINE__, str); \
return (ret_val); \
}
driver(pcnt): Add some APIs to support each unit can have it's own interrupt handler.
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typedef struct{
void(*fn)(void *args); /*!< isr function */
void* args; /*!< isr function args */
} pcnt_isr_func_t;
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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driver(pcnt): Add some APIs to support each unit can have it's own interrupt handler.
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static pcnt_isr_func_t *pcnt_isr_func = NULL;
static pcnt_isr_handle_t pcnt_isr_service = NULL;
static portMUX_TYPE pcnt_spinlock = portMUX_INITIALIZER_UNLOCKED;
static const char* PCNT_TAG = "pcnt";
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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components/driver: 'const' all config calls. Some were, some weren't. They all could/should be. Signed-off-by: Michel Pollet <buserror@gmail.com>
2017-04-13 13:33:33 -04:00
esp_err_t pcnt_unit_config(const pcnt_config_t *pcnt_config)
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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{
Fix wrong assignment of channel and unit in pcnt_unit_config
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uint8_t unit = pcnt_config->unit;
uint8_t channel = pcnt_config->channel;
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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int input_io = pcnt_config->pulse_gpio_num;
int ctrl_io = pcnt_config->ctrl_gpio_num;
PCNT_CHECK(unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_CHECK(channel < PCNT_CHANNEL_MAX, PCNT_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_CHECK(input_io < 0 || (GPIO_IS_VALID_GPIO(input_io) && (input_io != ctrl_io)), "PCNT pluse input io error", ESP_ERR_INVALID_ARG);
PCNT_CHECK(ctrl_io < 0 || GPIO_IS_VALID_GPIO(ctrl_io), "PCNT ctrl io error", ESP_ERR_INVALID_ARG);
PCNT_CHECK((pcnt_config->pos_mode < PCNT_COUNT_MAX) && (pcnt_config->neg_mode < PCNT_COUNT_MAX), PCNT_COUNT_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_CHECK((pcnt_config->hctrl_mode < PCNT_MODE_MAX) && (pcnt_config->lctrl_mode < PCNT_MODE_MAX), PCNT_CTRL_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
/*Enalbe hardware module*/
periph_module_enable(PERIPH_PCNT_MODULE);
/*Set counter range*/
pcnt_set_event_value(unit, PCNT_EVT_H_LIM, pcnt_config->counter_h_lim);
pcnt_set_event_value(unit, PCNT_EVT_L_LIM, pcnt_config->counter_l_lim);
/*Default value after reboot is positive, we disable these events like others*/
pcnt_event_disable(unit, PCNT_EVT_H_LIM);
pcnt_event_disable(unit, PCNT_EVT_L_LIM);
pcnt_event_disable(unit, PCNT_EVT_ZERO);
pcnt_filter_disable(unit);
/*set pulse input and control mode*/
pcnt_set_mode(unit, channel, pcnt_config->pos_mode, pcnt_config->neg_mode, pcnt_config->hctrl_mode, pcnt_config->lctrl_mode);
/*Set pulse input and control pins*/
pcnt_set_pin(unit, channel, input_io, ctrl_io);
return ESP_OK;
}
esp_err_t pcnt_set_mode(pcnt_unit_t unit, pcnt_channel_t channel, pcnt_count_mode_t pos_mode, pcnt_count_mode_t neg_mode, pcnt_ctrl_mode_t hctrl_mode, pcnt_ctrl_mode_t lctrl_mode)
{
PCNT_CHECK(unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_CHECK(channel < PCNT_CHANNEL_MAX, PCNT_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_CHECK((pos_mode < PCNT_COUNT_MAX) && (neg_mode < PCNT_COUNT_MAX), PCNT_COUNT_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_CHECK((hctrl_mode < PCNT_MODE_MAX) && (lctrl_mode < PCNT_MODE_MAX), PCNT_CTRL_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
if(channel == 0) {
PCNT.conf_unit[unit].conf0.ch0_pos_mode = pos_mode;
PCNT.conf_unit[unit].conf0.ch0_neg_mode = neg_mode;
PCNT.conf_unit[unit].conf0.ch0_hctrl_mode = hctrl_mode;
PCNT.conf_unit[unit].conf0.ch0_lctrl_mode = lctrl_mode;
} else {
PCNT.conf_unit[unit].conf0.ch1_pos_mode = pos_mode;
PCNT.conf_unit[unit].conf0.ch1_neg_mode = neg_mode;
PCNT.conf_unit[unit].conf0.ch1_hctrl_mode = hctrl_mode;
PCNT.conf_unit[unit].conf0.ch1_lctrl_mode = lctrl_mode;
}
return ESP_OK;
}
esp_err_t pcnt_set_pin(pcnt_unit_t unit, pcnt_channel_t channel, int pulse_io, int ctrl_io)
{
PCNT_CHECK(unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_CHECK(channel < PCNT_CHANNEL_MAX, PCNT_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_CHECK(GPIO_IS_VALID_GPIO(pulse_io) || pulse_io < 0, PCNT_GPIO_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_CHECK(GPIO_IS_VALID_GPIO(ctrl_io) || ctrl_io < 0, PCNT_GPIO_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT: fix for pcnt_set_pin API, it can now use all pcnt channels
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int sig_base = (channel == 0) ? PCNT_SIG_CH0_IN0_IDX : PCNT_SIG_CH1_IN0_IDX;
int ctrl_base = (channel == 0) ? PCNT_CTRL_CH0_IN0_IDX : PCNT_CTRL_CH1_IN0_IDX;
if (unit > 4) {
sig_base += 12; // GPIO matrix assignments have a gap between units 4 & 5
ctrl_base += 12;
}
int input_sig_index = sig_base + (4 * unit);
int ctrl_sig_index = ctrl_base + (4 * unit);
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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if(pulse_io >= 0) {
PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[pulse_io], PIN_FUNC_GPIO);
gpio_set_direction(pulse_io, GPIO_MODE_INPUT);
gpio_set_pull_mode(pulse_io, GPIO_PULLUP_ONLY);
gpio_matrix_in(pulse_io, input_sig_index, 0);
}
if(ctrl_io >= 0) {
PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[ctrl_io], PIN_FUNC_GPIO);
gpio_set_direction(ctrl_io, GPIO_MODE_INPUT);
gpio_set_pull_mode(ctrl_io, GPIO_PULLUP_ONLY);
gpio_matrix_in(ctrl_io, ctrl_sig_index, 0);
}
return ESP_OK;
}
esp_err_t pcnt_get_counter_value(pcnt_unit_t pcnt_unit, int16_t* count)
{
PCNT_CHECK(pcnt_unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
driver: PCNT minor changes
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PCNT_CHECK(count != NULL, PCNT_ADDRESS_ERR_STR, ESP_ERR_INVALID_ARG);
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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*count = (int16_t) PCNT.cnt_unit[pcnt_unit].cnt_val;
return ESP_OK;
}
esp_err_t pcnt_counter_pause(pcnt_unit_t pcnt_unit)
{
PCNT_CHECK(pcnt_unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_ENTER_CRITICAL(&pcnt_spinlock);
PCNT.ctrl.val |= BIT(PCNT_CNT_PAUSE_U0_S + (pcnt_unit * 2));
PCNT_EXIT_CRITICAL(&pcnt_spinlock);
return ESP_OK;
}
esp_err_t pcnt_counter_resume(pcnt_unit_t pcnt_unit)
{
PCNT_CHECK(pcnt_unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_ENTER_CRITICAL(&pcnt_spinlock);
PCNT.ctrl.val &= (~(BIT(PCNT_CNT_PAUSE_U0_S + (pcnt_unit * 2))));
PCNT_EXIT_CRITICAL(&pcnt_spinlock);
return ESP_OK;
}
esp_err_t pcnt_counter_clear(pcnt_unit_t pcnt_unit)
{
PCNT_CHECK(pcnt_unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_ENTER_CRITICAL(&pcnt_spinlock);
PCNT: Fixed pcnt_counter_clear, Pulse Count now able to resume after API call
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uint32_t reset_bit = BIT(PCNT_PLUS_CNT_RST_U0_S + (pcnt_unit * 2));
PCNT.ctrl.val |= reset_bit;
PCNT.ctrl.val &= ~reset_bit;
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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PCNT_EXIT_CRITICAL(&pcnt_spinlock);
return ESP_OK;
}
esp_err_t pcnt_intr_enable(pcnt_unit_t pcnt_unit)
{
PCNT_CHECK(pcnt_unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_ENTER_CRITICAL(&pcnt_spinlock);
PCNT.int_ena.val |= BIT(PCNT_CNT_THR_EVENT_U0_INT_ENA_S + pcnt_unit);
PCNT_EXIT_CRITICAL(&pcnt_spinlock);
return ESP_OK;
}
esp_err_t pcnt_intr_disable(pcnt_unit_t pcnt_unit)
{
PCNT_CHECK(pcnt_unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_ENTER_CRITICAL(&pcnt_spinlock);
PCNT.int_ena.val &= (~(BIT(PCNT_CNT_THR_EVENT_U0_INT_ENA_S + pcnt_unit)));
PCNT_EXIT_CRITICAL(&pcnt_spinlock);
return ESP_OK;
}
esp_err_t pcnt_event_enable(pcnt_unit_t unit, pcnt_evt_type_t evt_type)
{
PCNT_CHECK(unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
driver: PCNT minor changes
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PCNT_CHECK(evt_type < PCNT_EVT_MAX, PCNT_EVT_TYPE_ERR_STR, ESP_ERR_INVALID_ARG);
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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if(evt_type == PCNT_EVT_L_LIM) {
PCNT.conf_unit[unit].conf0.thr_l_lim_en = 1;
} else if(evt_type == PCNT_EVT_H_LIM) {
PCNT.conf_unit[unit].conf0.thr_h_lim_en = 1;
driver: PCNT minor changes
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} else if(evt_type == PCNT_EVT_THRES_0) {
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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PCNT.conf_unit[unit].conf0.thr_thres0_en = 1;
driver: PCNT minor changes
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} else if(evt_type == PCNT_EVT_THRES_1) {
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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PCNT.conf_unit[unit].conf0.thr_thres1_en = 1;
} else if(evt_type == PCNT_EVT_ZERO) {
PCNT.conf_unit[unit].conf0.thr_zero_en = 1;
}
return ESP_OK;
}
esp_err_t pcnt_event_disable(pcnt_unit_t unit, pcnt_evt_type_t evt_type)
{
PCNT_CHECK(unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
driver: PCNT minor changes
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PCNT_CHECK(evt_type < PCNT_EVT_MAX, PCNT_EVT_TYPE_ERR_STR, ESP_ERR_INVALID_ARG);
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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if(evt_type == PCNT_EVT_L_LIM) {
PCNT.conf_unit[unit].conf0.thr_l_lim_en = 0;
} else if(evt_type == PCNT_EVT_H_LIM) {
PCNT.conf_unit[unit].conf0.thr_h_lim_en = 0;
driver: PCNT minor changes
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} else if(evt_type == PCNT_EVT_THRES_0) {
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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PCNT.conf_unit[unit].conf0.thr_thres0_en = 0;
driver: PCNT minor changes
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} else if(evt_type == PCNT_EVT_THRES_1) {
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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PCNT.conf_unit[unit].conf0.thr_thres1_en = 0;
} else if(evt_type == PCNT_EVT_ZERO) {
PCNT.conf_unit[unit].conf0.thr_zero_en = 0;
}
return ESP_OK;
}
esp_err_t pcnt_set_event_value(pcnt_unit_t unit, pcnt_evt_type_t evt_type, int16_t value)
{
PCNT_CHECK(unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
driver: PCNT minor changes
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PCNT_CHECK(evt_type < PCNT_EVT_MAX, PCNT_EVT_TYPE_ERR_STR, ESP_ERR_INVALID_ARG);
Add some comments in pcnt.h.
2018-05-25 03:37:20 -04:00
PCNT_CHECK(!(evt_type == PCNT_EVT_L_LIM && value > 0), PCNT_LIMT_VAL_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_CHECK(!(evt_type == PCNT_EVT_H_LIM && value < 0), PCNT_LIMT_VAL_ERR_STR, ESP_ERR_INVALID_ARG);
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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if(evt_type == PCNT_EVT_L_LIM) {
PCNT.conf_unit[unit].conf2.cnt_l_lim = value;
} else if(evt_type == PCNT_EVT_H_LIM) {
PCNT.conf_unit[unit].conf2.cnt_h_lim = value;
driver: PCNT minor changes
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} else if(evt_type == PCNT_EVT_THRES_0) {
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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PCNT.conf_unit[unit].conf1.cnt_thres0 = value;
driver: PCNT minor changes
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} else if(evt_type == PCNT_EVT_THRES_1) {
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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PCNT.conf_unit[unit].conf1.cnt_thres1 = value;
}
return ESP_OK;
}
esp_err_t pcnt_get_event_value(pcnt_unit_t unit, pcnt_evt_type_t evt_type, int16_t *value)
{
PCNT_CHECK(unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
driver: PCNT minor changes
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PCNT_CHECK(evt_type < PCNT_EVT_MAX, PCNT_EVT_TYPE_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_CHECK(value != NULL, PCNT_ADDRESS_ERR_STR, ESP_ERR_INVALID_ARG);
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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if(evt_type == PCNT_EVT_L_LIM) {
*value = (int16_t) PCNT.conf_unit[unit].conf2.cnt_l_lim;
} else if(evt_type == PCNT_EVT_H_LIM) {
*value = (int16_t) PCNT.conf_unit[unit].conf2.cnt_h_lim;
driver: PCNT minor changes
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} else if(evt_type == PCNT_EVT_THRES_0) {
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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*value = (int16_t) PCNT.conf_unit[unit].conf1.cnt_thres0;
driver: PCNT minor changes
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} else if(evt_type == PCNT_EVT_THRES_1) {
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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*value = (int16_t) PCNT.conf_unit[unit].conf1.cnt_thres1;
} else {
*value = 0;
}
return ESP_OK;
}
esp_err_t pcnt_set_filter_value(pcnt_unit_t unit, uint16_t filter_val)
{
PCNT_CHECK(unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT_CHECK(filter_val < 1024, PCNT_PARAM_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT.conf_unit[unit].conf0.filter_thres = filter_val;
return ESP_OK;
}
esp_err_t pcnt_get_filter_value(pcnt_unit_t unit, uint16_t *filter_val)
{
PCNT_CHECK(unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
driver: PCNT minor changes
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PCNT_CHECK(filter_val != NULL, PCNT_ADDRESS_ERR_STR, ESP_ERR_INVALID_ARG);
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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*filter_val = PCNT.conf_unit[unit].conf0.filter_thres;
return ESP_OK;
}
esp_err_t pcnt_filter_enable(pcnt_unit_t unit)
{
PCNT_CHECK(unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT.conf_unit[unit].conf0.filter_en = 1;
return ESP_OK;
}
esp_err_t pcnt_filter_disable(pcnt_unit_t unit)
{
PCNT_CHECK(unit < PCNT_UNIT_MAX, PCNT_UNIT_ERR_STR, ESP_ERR_INVALID_ARG);
PCNT.conf_unit[unit].conf0.filter_en = 0;
return ESP_OK;
}
Add disabling/enabling of shared interrupt, add testcase for interrupts
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esp_err_t pcnt_isr_register(void (*fun)(void*), void * arg, int intr_alloc_flags, pcnt_isr_handle_t *handle)
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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{
PCNT_CHECK(fun != NULL, PCNT_ADDRESS_ERR_STR, ESP_ERR_INVALID_ARG);
Add disabling/enabling of shared interrupt, add testcase for interrupts
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return esp_intr_alloc(ETS_PCNT_INTR_SOURCE, intr_alloc_flags, fun, arg, handle);
driver: Add PCNT code 1. add PCNT module in periph_ctrl.c/.h 2. add description of PCNT status in pcnt_struct.h 3. add PCNT driver code 4. add PCNT example code.
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}
driver(pcnt): Add some APIs to support each unit can have it's own interrupt handler.
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// pcnt interrupt service
static void IRAM_ATTR pcnt_intr_service(void* arg)
{
uint32_t intr_status = PCNT.int_st.val;
for (int unit = 0; unit < PCNT_UNIT_MAX; unit++) {
if (intr_status & (BIT(unit))) {
if (pcnt_isr_func[unit].fn != NULL) {
(pcnt_isr_func[unit].fn)(pcnt_isr_func[unit].args);
}
PCNT.int_clr.val = BIT(unit);
}
}
}
esp_err_t pcnt_isr_handler_add(pcnt_unit_t unit, void(*isr_handler)(void *), void *args)
{
PCNT_CHECK(pcnt_isr_func != NULL, "ISR service is not installed, call pcnt_install_isr_service() first", ESP_ERR_INVALID_STATE);
PCNT_CHECK(unit < PCNT_UNIT_MAX, "PCNT unit error", ESP_ERR_INVALID_ARG);
PCNT_ENTER_CRITICAL(&pcnt_spinlock);
pcnt_intr_disable(unit);
if (pcnt_isr_func) {
pcnt_isr_func[unit].fn = isr_handler;
pcnt_isr_func[unit].args = args;
}
pcnt_intr_enable(unit);
PCNT_EXIT_CRITICAL(&pcnt_spinlock);
return ESP_OK;
}
esp_err_t pcnt_isr_handler_remove(pcnt_unit_t unit)
{
PCNT_CHECK(pcnt_isr_func != NULL, "ISR service is not installed", ESP_ERR_INVALID_STATE);
PCNT_CHECK(unit < PCNT_UNIT_MAX, "PCNT unit error", ESP_ERR_INVALID_ARG);
PCNT_ENTER_CRITICAL(&pcnt_spinlock);
pcnt_intr_disable(unit);
if (pcnt_isr_func) {
pcnt_isr_func[unit].fn = NULL;
pcnt_isr_func[unit].args = NULL;
}
PCNT_EXIT_CRITICAL(&pcnt_spinlock);
return ESP_OK;
}
esp_err_t pcnt_isr_service_install(int intr_alloc_flags)
{
PCNT_CHECK(pcnt_isr_func == NULL, "ISR service already installed", ESP_ERR_INVALID_STATE);
PCNT_ENTER_CRITICAL(&pcnt_spinlock);
esp_err_t ret = ESP_FAIL;
pcnt_isr_func = (pcnt_isr_func_t*) calloc(PCNT_UNIT_MAX, sizeof(pcnt_isr_func_t));
if (pcnt_isr_func == NULL) {
ret = ESP_ERR_NO_MEM;
} else {
ret = pcnt_isr_register(pcnt_intr_service, NULL, intr_alloc_flags, &pcnt_isr_service);
}
PCNT_EXIT_CRITICAL(&pcnt_spinlock);
return ret;
}
void pcnt_isr_service_uninstall(void)
{
if (pcnt_isr_func == NULL) {
return;
}
PCNT_ENTER_CRITICAL(&pcnt_spinlock);
esp_intr_free(pcnt_isr_service);
free(pcnt_isr_func);
pcnt_isr_func = NULL;
pcnt_isr_service = NULL;
PCNT_EXIT_CRITICAL(&pcnt_spinlock);
}
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