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52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
// Copyright 2016-2017 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "pm_trace.h"
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#include "driver/gpio.h"
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#include "soc/gpio_reg.h"
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/* GPIOs to use for tracing of esp_pm events.
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* Two entries in the array for each type, one for each CPU.
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* Feel free to change when debugging.
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*/
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static const int DRAM_ATTR s_trace_io[] = {
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BIT(4), BIT(5), // ESP_PM_TRACE_IDLE
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BIT(16), BIT(17), // ESP_PM_TRACE_TICK
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BIT(18), BIT(18), // ESP_PM_TRACE_FREQ_SWITCH
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BIT(19), BIT(19), // ESP_PM_TRACE_CCOMPARE_UPDATE
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BIT(25), BIT(26), // ESP_PM_TRACE_ISR_HOOK
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};
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void esp_pm_trace_init()
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{
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for (size_t i = 0; i < sizeof(s_trace_io)/sizeof(s_trace_io[0]); ++i) {
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int io = __builtin_ffs(s_trace_io[i]);
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if (io == 0) {
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continue;
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}
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gpio_set_direction(io - 1, GPIO_MODE_OUTPUT);
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}
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}
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void IRAM_ATTR esp_pm_trace_enter(esp_pm_trace_event_t event, int core_id)
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{
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REG_WRITE(GPIO_OUT_W1TS_REG, s_trace_io[2 * event + core_id]);
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}
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void IRAM_ATTR esp_pm_trace_exit(esp_pm_trace_event_t event, int core_id)
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{
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REG_WRITE(GPIO_OUT_W1TC_REG, s_trace_io[2 * event + core_id]);
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}
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