470 lines
17 KiB
C
470 lines
17 KiB
C
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// Copyright 2015-2020 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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// 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 "sdkconfig.h"
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#if CONFIG_IDF_TARGET_ESP32S2
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#include <stdio.h>
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#include <string.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/semphr.h"
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#include "esp_log.h"
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#include "driver/gpio.h"
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#include "driver/i2s.h"
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#include "esp_heap_caps.h"
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#include "esp32s2/rom/lldesc.h"
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#include "soc/system_reg.h"
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#include "i2s_lcd_driver.h"
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static const char *TAG = "ESP32S2_I2S_LCD";
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#define I2S_CHECK(a, str, ret) if (!(a)) { \
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ESP_LOGE(TAG,"%s:%d (%s):%s", __FILE__, __LINE__, __FUNCTION__, str); \
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return (ret); \
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}
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#define LCD_CAM_DMA_NODE_BUFFER_MAX_SIZE (4000) // 4-byte aligned
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#define LCD_DATA_MAX_WIDTH (24) /*!< Maximum width of LCD data bus */
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typedef struct {
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uint32_t dma_buffer_size;
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uint32_t dma_half_buffer_size;
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uint32_t dma_node_buffer_size;
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uint32_t dma_node_cnt;
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uint32_t dma_half_node_cnt;
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lldesc_t *dma;
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uint8_t *dma_buffer;
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QueueHandle_t event_queue;
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uint8_t width;
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bool swap_data;
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intr_handle_t lcd_cam_intr_handle;
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i2s_dev_t *i2s_dev;
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} i2s_lcd_obj_t;
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typedef struct {
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int rs_io_num;
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i2s_lcd_obj_t *i2s_lcd_obj;
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SemaphoreHandle_t mutex;
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} i2s_lcd_driver_t;
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static void IRAM_ATTR i2s_isr(void *arg)
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{
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BaseType_t HPTaskAwoken = pdFALSE;
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i2s_lcd_obj_t *i2s_lcd_obj = (i2s_lcd_obj_t*)arg;
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i2s_dev_t *i2s_dev = i2s_lcd_obj->i2s_dev;
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typeof(i2s_dev->int_st) status = i2s_dev->int_st;
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i2s_dev->int_clr.val = status.val;
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if (status.val == 0) {
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return;
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}
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if (status.out_eof) {
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xQueueSendFromISR(i2s_lcd_obj->event_queue, (void*)&status.val, &HPTaskAwoken);
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}
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if (HPTaskAwoken == pdTRUE) {
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portYIELD_FROM_ISR();
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}
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}
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static void lcd_dma_set_int(i2s_lcd_obj_t *i2s_lcd_obj)
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{
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// Generate a data DMA linked list
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for (int x = 0; x < i2s_lcd_obj->dma_node_cnt; x++) {
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i2s_lcd_obj->dma[x].size = i2s_lcd_obj->dma_node_buffer_size;
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i2s_lcd_obj->dma[x].length = i2s_lcd_obj->dma_node_buffer_size;
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i2s_lcd_obj->dma[x].buf = (i2s_lcd_obj->dma_buffer + i2s_lcd_obj->dma_node_buffer_size * x);
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i2s_lcd_obj->dma[x].eof = !((x + 1) % i2s_lcd_obj->dma_half_node_cnt);
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i2s_lcd_obj->dma[x].empty = (uint32_t)&i2s_lcd_obj->dma[(x + 1) % i2s_lcd_obj->dma_node_cnt];
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}
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i2s_lcd_obj->dma[i2s_lcd_obj->dma_half_node_cnt - 1].empty = (uint32_t)NULL;
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i2s_lcd_obj->dma[i2s_lcd_obj->dma_node_cnt - 1].empty = (uint32_t)NULL;
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}
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static void lcd_dma_set_left(i2s_lcd_obj_t *i2s_lcd_obj, int pos, size_t len)
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{
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int end_pos = 0, size = 0;
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// Processing data length is an integer multiple of i2s_lcd_obj->dma_node_buffer_size
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if (len % i2s_lcd_obj->dma_node_buffer_size) {
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end_pos = (pos % 2) * i2s_lcd_obj->dma_half_node_cnt + len / i2s_lcd_obj->dma_node_buffer_size;
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size = len % i2s_lcd_obj->dma_node_buffer_size;
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} else {
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end_pos = (pos % 2) * i2s_lcd_obj->dma_half_node_cnt + len / i2s_lcd_obj->dma_node_buffer_size - 1;
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size = i2s_lcd_obj->dma_node_buffer_size;
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}
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// Process the tail node to make it a DMA tail
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i2s_lcd_obj->dma[end_pos].size = size;
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i2s_lcd_obj->dma[end_pos].length = size;
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i2s_lcd_obj->dma[end_pos].eof = 1;
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i2s_lcd_obj->dma[end_pos].empty = (uint32_t)NULL;
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}
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static void lcd_i2s_start(i2s_dev_t *i2s_dev, uint32_t addr, size_t len)
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{
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while (!i2s_dev->state.tx_idle);
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i2s_dev->conf.tx_start = 0;
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i2s_dev->conf.tx_reset = 1;
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i2s_dev->conf.tx_reset = 0;
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i2s_dev->conf.tx_fifo_reset = 1;
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i2s_dev->conf.tx_fifo_reset = 0;
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i2s_dev->out_link.addr = addr;
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i2s_dev->out_link.start = 1;
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ets_delay_us(1);
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i2s_dev->conf.tx_start = 1;
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}
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static void i2s_write_data(i2s_lcd_obj_t *i2s_lcd_obj, uint8_t *data, size_t len)
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{
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int event = 0;
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int x = 0, y = 0, left = 0, cnt = 0;
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if (len <= 0) {
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ESP_LOGE(TAG, "wrong len!");
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return;
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}
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lcd_dma_set_int(i2s_lcd_obj);
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uint32_t half_buffer_size = i2s_lcd_obj->dma_half_buffer_size;
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cnt = len / half_buffer_size;
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// Start signal
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xQueueSend(i2s_lcd_obj->event_queue, &event, 0);
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// Process a complete piece of data, ping-pong operation
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for (x = 0; x < cnt; x++) {
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uint8_t *out = (uint8_t*)i2s_lcd_obj->dma[(x % 2) * i2s_lcd_obj->dma_half_node_cnt].buf;
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uint8_t *in = data;
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if (i2s_lcd_obj->swap_data) {
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uint8_t *out1 = out + 1;
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uint8_t *in1 = in + 1;
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for (y = 0; y < half_buffer_size;) {
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out1[y] = in[y];
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out[y] = in1[y];
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y += 2;
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out1[y] = in[y];
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out[y] = in1[y];
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y += 2;
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}
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} else {
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memcpy(out, in, half_buffer_size);
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}
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data += half_buffer_size;
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xQueueReceive(i2s_lcd_obj->event_queue, (void *)&event, portMAX_DELAY);
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lcd_i2s_start(i2s_lcd_obj->i2s_dev, ((uint32_t)&i2s_lcd_obj->dma[(x % 2) * i2s_lcd_obj->dma_half_node_cnt]) & 0xfffff, half_buffer_size);
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}
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left = len % half_buffer_size;
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// Process remaining incomplete segment data
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if (left) {
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uint8_t *out = (uint8_t*)i2s_lcd_obj->dma[(x % 2) * i2s_lcd_obj->dma_half_node_cnt].buf;
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uint8_t *in = data;
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cnt = left - left % 2;
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if (cnt) {
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if (i2s_lcd_obj->swap_data) {
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for (y = 0; y < cnt; y+=2) {
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out[y+1] = in[y+0];
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out[y+0] = in[y+1];
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}
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} else {
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memcpy(out, in, cnt);
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}
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}
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if (left % 2) {
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out[cnt] = in[cnt];
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}
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lcd_dma_set_left(i2s_lcd_obj, x, left);
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xQueueReceive(i2s_lcd_obj->event_queue, (void *)&event, portMAX_DELAY);
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lcd_i2s_start(i2s_lcd_obj->i2s_dev, ((uint32_t)&i2s_lcd_obj->dma[(x % 2) * i2s_lcd_obj->dma_half_node_cnt]) & 0xfffff, left);
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}
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xQueueReceive(i2s_lcd_obj->event_queue, (void *)&event, portMAX_DELAY);
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}
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static esp_err_t i2s_lcd_reg_config(i2s_dev_t *i2s_dev, uint16_t data_width, uint32_t clk_freq)
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{
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// Configure the clock
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i2s_dev->clkm_conf.val = 0;
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i2s_dev->clkm_conf.clkm_div_num = 2; // 160MHz / 2 = 80MHz
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i2s_dev->clkm_conf.clkm_div_b = 0;
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i2s_dev->clkm_conf.clkm_div_a = 63;
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i2s_dev->clkm_conf.clk_sel = 2;
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i2s_dev->clkm_conf.clk_en = 1;
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// Configure sampling rate
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i2s_dev->sample_rate_conf.tx_bck_div_num = 40000000 / clk_freq; // Fws = Fbck / 2
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i2s_dev->sample_rate_conf.tx_bits_mod = data_width;
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i2s_dev->timing.val = 0;
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i2s_dev->int_ena.val = 0;
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i2s_dev->int_clr.val = ~0;
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i2s_dev->conf2.val = 0;
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i2s_dev->conf2.lcd_en = 1;
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// Configuration data format
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i2s_dev->conf.val = 0;
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i2s_dev->conf.tx_right_first = 1;
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i2s_dev->conf.tx_msb_right = 1;
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i2s_dev->conf.tx_dma_equal = 1;
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i2s_dev->conf1.tx_pcm_bypass = 1;
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i2s_dev->conf1.tx_stop_en = 1;
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i2s_dev->fifo_conf.val = 0;
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i2s_dev->fifo_conf.dscr_en = 1;
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i2s_dev->fifo_conf.tx_fifo_mod_force_en = 1;
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i2s_dev->fifo_conf.tx_data_num = 32;
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i2s_dev->fifo_conf.tx_fifo_mod = 2;
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i2s_dev->fifo_conf.tx_24msb_en = 0;
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i2s_dev->conf_chan.tx_chan_mod = 0;//remove
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i2s_dev->int_ena.out_eof = 1;
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return ESP_OK;
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}
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static esp_err_t lcd_set_pin(const i2s_lcd_config_t *config)
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{
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PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[config->pin_num_wr], PIN_FUNC_GPIO);
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gpio_set_direction(config->pin_num_wr, GPIO_MODE_OUTPUT);
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gpio_set_pull_mode(config->pin_num_wr, GPIO_FLOATING);
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gpio_matrix_out(config->pin_num_wr, I2S0O_WS_OUT_IDX, true, false);
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for (int i = 0; i < config->data_width; i++) {
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PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[config->pin_data_num[i]], PIN_FUNC_GPIO);
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gpio_set_direction(config->pin_data_num[i], GPIO_MODE_OUTPUT);
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gpio_set_pull_mode(config->pin_data_num[i], GPIO_FLOATING);
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// High bit aligned, OUT23 is always the highest bit
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gpio_matrix_out(config->pin_data_num[i], I2S0O_DATA_OUT0_IDX + (LCD_DATA_MAX_WIDTH - config->data_width) + i, false, false);
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}
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return ESP_OK;
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}
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static esp_err_t lcd_dma_config(i2s_lcd_obj_t *i2s_lcd_obj, uint32_t max_dma_buffer_size)
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{
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int cnt = 0;
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if (LCD_CAM_DMA_NODE_BUFFER_MAX_SIZE % 2 != 0) {
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ESP_LOGE(TAG, "ESP32 only supports 2-byte aligned data length");
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return ESP_FAIL;
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}
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if (max_dma_buffer_size >= LCD_CAM_DMA_NODE_BUFFER_MAX_SIZE * 2) {
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i2s_lcd_obj->dma_node_buffer_size = LCD_CAM_DMA_NODE_BUFFER_MAX_SIZE;
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for (cnt = 0; cnt < max_dma_buffer_size - 8; cnt++) { // Find a buffer size that can divide dma_size
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if ((max_dma_buffer_size - cnt) % (i2s_lcd_obj->dma_node_buffer_size * 2) == 0) {
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break;
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}
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}
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i2s_lcd_obj->dma_buffer_size = max_dma_buffer_size - cnt;
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} else {
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i2s_lcd_obj->dma_node_buffer_size = max_dma_buffer_size / 2;
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i2s_lcd_obj->dma_buffer_size = i2s_lcd_obj->dma_node_buffer_size * 2;
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}
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i2s_lcd_obj->dma_half_buffer_size = i2s_lcd_obj->dma_buffer_size / 2;
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i2s_lcd_obj->dma_node_cnt = (i2s_lcd_obj->dma_buffer_size) / i2s_lcd_obj->dma_node_buffer_size; // Number of DMA nodes
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i2s_lcd_obj->dma_half_node_cnt = i2s_lcd_obj->dma_node_cnt / 2;
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ESP_LOGI(TAG, "lcd_buffer_size: %d, lcd_dma_size: %d, lcd_dma_node_cnt: %d", i2s_lcd_obj->dma_buffer_size, i2s_lcd_obj->dma_node_buffer_size, i2s_lcd_obj->dma_node_cnt);
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i2s_lcd_obj->dma = (lldesc_t *)heap_caps_malloc(i2s_lcd_obj->dma_node_cnt * sizeof(lldesc_t), MALLOC_CAP_DMA | MALLOC_CAP_8BIT);
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i2s_lcd_obj->dma_buffer = (uint8_t *)heap_caps_malloc(i2s_lcd_obj->dma_buffer_size * sizeof(uint8_t), MALLOC_CAP_DMA | MALLOC_CAP_8BIT);
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return ESP_OK;
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}
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static esp_err_t lcd_cam_deinit(i2s_lcd_driver_t *drv)
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{
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if (!drv->i2s_lcd_obj) {
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return ESP_FAIL;
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}
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if (drv->i2s_lcd_obj->event_queue) {
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vQueueDelete(drv->i2s_lcd_obj->event_queue);
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}
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if (drv->i2s_lcd_obj->dma) {
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heap_caps_free(drv->i2s_lcd_obj->dma);
|
||
|
|
}
|
||
|
|
if (drv->i2s_lcd_obj->dma_buffer) {
|
||
|
|
heap_caps_free(drv->i2s_lcd_obj->dma_buffer);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (drv->i2s_lcd_obj->lcd_cam_intr_handle) {
|
||
|
|
esp_intr_free(drv->i2s_lcd_obj->lcd_cam_intr_handle);
|
||
|
|
}
|
||
|
|
|
||
|
|
heap_caps_free(drv->i2s_lcd_obj);
|
||
|
|
drv->i2s_lcd_obj = NULL;
|
||
|
|
return ESP_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
static esp_err_t lcd_cam_init(i2s_lcd_driver_t *drv, const i2s_lcd_config_t *config)
|
||
|
|
{
|
||
|
|
esp_err_t ret = ESP_OK;
|
||
|
|
|
||
|
|
i2s_lcd_obj_t *i2s_lcd_obj = (i2s_lcd_obj_t *)heap_caps_calloc(1, sizeof(i2s_lcd_obj_t), MALLOC_CAP_DMA);
|
||
|
|
if (i2s_lcd_obj == NULL) {
|
||
|
|
ESP_LOGE(TAG, "lcd_cam object malloc error");
|
||
|
|
return ESP_ERR_NO_MEM;
|
||
|
|
}
|
||
|
|
drv->i2s_lcd_obj = i2s_lcd_obj;
|
||
|
|
|
||
|
|
if (I2S_NUM_0 == config->i2s_port) {
|
||
|
|
i2s_lcd_obj->i2s_dev = &I2S0;
|
||
|
|
periph_module_enable(PERIPH_I2S0_MODULE);
|
||
|
|
} else {
|
||
|
|
ESP_LOGE(TAG, "Designated I2S peripheral not found");
|
||
|
|
}
|
||
|
|
|
||
|
|
ret |= i2s_lcd_reg_config(i2s_lcd_obj->i2s_dev, config->data_width, config->clk_freq);
|
||
|
|
|
||
|
|
if (ret != ESP_OK) {
|
||
|
|
ESP_LOGE(TAG, "lcd_cam config fail!");
|
||
|
|
lcd_cam_deinit(drv);
|
||
|
|
return ESP_FAIL;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret |= lcd_set_pin(config);
|
||
|
|
ret |= lcd_dma_config(i2s_lcd_obj, config->buffer_size);
|
||
|
|
|
||
|
|
if (ret != ESP_OK) {
|
||
|
|
ESP_LOGE(TAG, "lcd config fail!");
|
||
|
|
lcd_cam_deinit(drv);
|
||
|
|
return ESP_FAIL;
|
||
|
|
}
|
||
|
|
|
||
|
|
i2s_lcd_obj->event_queue = xQueueCreate(1, sizeof(int));
|
||
|
|
i2s_lcd_obj->width = config->data_width;
|
||
|
|
i2s_lcd_obj->swap_data = config->swap_data;
|
||
|
|
|
||
|
|
if (i2s_lcd_obj->event_queue == NULL) {
|
||
|
|
ESP_LOGE(TAG, "lcd config fail!");
|
||
|
|
lcd_cam_deinit(drv);
|
||
|
|
return ESP_FAIL;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret |= esp_intr_alloc(ETS_I2S0_INTR_SOURCE, ESP_INTR_FLAG_LOWMED | ESP_INTR_FLAG_IRAM, i2s_isr, i2s_lcd_obj, &i2s_lcd_obj->lcd_cam_intr_handle);
|
||
|
|
|
||
|
|
if (ret != ESP_OK) {
|
||
|
|
ESP_LOGE(TAG, "lcd_cam intr alloc fail!");
|
||
|
|
lcd_cam_deinit(drv);
|
||
|
|
return ESP_FAIL;
|
||
|
|
}
|
||
|
|
|
||
|
|
ESP_LOGI(TAG, "lcd init ok");
|
||
|
|
|
||
|
|
return ESP_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**< Public functions */
|
||
|
|
|
||
|
|
i2s_lcd_handle_t i2s_lcd_driver_init(const i2s_lcd_config_t *config)
|
||
|
|
{
|
||
|
|
I2S_CHECK(NULL != config, "config pointer invalid", NULL);
|
||
|
|
I2S_CHECK(GPIO_IS_VALID_GPIO(config->pin_num_wr), "GPIO WR invalid", NULL);
|
||
|
|
I2S_CHECK(GPIO_IS_VALID_GPIO(config->pin_num_rs), "GPIO RS invalid", NULL);
|
||
|
|
I2S_CHECK(config->data_width > 0 && config->data_width <= 16, "Bit width out of range", NULL);
|
||
|
|
I2S_CHECK(0 == (config->data_width % 8), "Bit width must be a multiple of 8", NULL);
|
||
|
|
uint64_t pin_mask = 0;
|
||
|
|
for (size_t i = 0; i < config->data_width; i++) {
|
||
|
|
uint64_t mask = 1ULL << config->pin_data_num[i];
|
||
|
|
I2S_CHECK(!(pin_mask & mask), "Data bus GPIO has a duplicate", NULL);
|
||
|
|
I2S_CHECK(GPIO_IS_VALID_GPIO(config->pin_data_num[i]), "Data bus gpio invalid", NULL);
|
||
|
|
pin_mask |= mask;
|
||
|
|
}
|
||
|
|
|
||
|
|
i2s_lcd_driver_t *i2s_lcd_drv = (i2s_lcd_driver_t *)heap_caps_malloc(sizeof(i2s_lcd_driver_t), MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
|
||
|
|
I2S_CHECK(NULL != i2s_lcd_drv, "Error malloc handle of i2s lcd driver", NULL);
|
||
|
|
|
||
|
|
esp_err_t ret = lcd_cam_init(i2s_lcd_drv, config);
|
||
|
|
if(ESP_OK != ret) {
|
||
|
|
ESP_LOGE(TAG,"%s:%d (%s):%s", __FILE__, __LINE__, __FUNCTION__, "i2s lcd driver initialize failed");
|
||
|
|
heap_caps_free(i2s_lcd_drv);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
i2s_lcd_drv->mutex = xSemaphoreCreateMutex();
|
||
|
|
if (i2s_lcd_drv->mutex == NULL) {
|
||
|
|
ESP_LOGE(TAG, "%s:%d (%s):%s", __FILE__, __LINE__, __FUNCTION__, "lcd create mutex failed");
|
||
|
|
lcd_cam_deinit(i2s_lcd_drv);
|
||
|
|
heap_caps_free(i2s_lcd_drv);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (config->pin_num_cs >= 0) {
|
||
|
|
gpio_pad_select_gpio(config->pin_num_cs);
|
||
|
|
gpio_set_direction(config->pin_num_cs, GPIO_MODE_OUTPUT);
|
||
|
|
gpio_set_level(config->pin_num_cs, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
gpio_pad_select_gpio(config->pin_num_rs);
|
||
|
|
gpio_set_direction(config->pin_num_rs, GPIO_MODE_OUTPUT);
|
||
|
|
i2s_lcd_drv->rs_io_num = config->pin_num_rs;
|
||
|
|
return (i2s_lcd_handle_t)i2s_lcd_drv;
|
||
|
|
}
|
||
|
|
|
||
|
|
esp_err_t i2s_lcd_driver_deinit(i2s_lcd_handle_t handle)
|
||
|
|
{
|
||
|
|
i2s_lcd_driver_t *i2s_lcd_drv = (i2s_lcd_driver_t *)handle;
|
||
|
|
I2S_CHECK(NULL != i2s_lcd_drv, "handle pointer invalid", ESP_ERR_INVALID_ARG);
|
||
|
|
lcd_cam_deinit(i2s_lcd_drv);
|
||
|
|
vSemaphoreDelete(i2s_lcd_drv->mutex);
|
||
|
|
heap_caps_free(handle);
|
||
|
|
return ESP_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
esp_err_t i2s_lcd_write_data(i2s_lcd_handle_t handle, uint16_t data)
|
||
|
|
{
|
||
|
|
i2s_lcd_driver_t *i2s_lcd_drv = (i2s_lcd_driver_t *)handle;
|
||
|
|
I2S_CHECK(NULL != i2s_lcd_drv, "handle pointer invalid", ESP_ERR_INVALID_ARG);
|
||
|
|
i2s_write_data(i2s_lcd_drv->i2s_lcd_obj, (uint8_t *)&data, i2s_lcd_drv->i2s_lcd_obj->width == 16 ? 2 : 1);
|
||
|
|
return ESP_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
esp_err_t i2s_lcd_write_cmd(i2s_lcd_handle_t handle, uint16_t cmd)
|
||
|
|
{
|
||
|
|
i2s_lcd_driver_t *i2s_lcd_drv = (i2s_lcd_driver_t *)handle;
|
||
|
|
I2S_CHECK(NULL != i2s_lcd_drv, "handle pointer invalid", ESP_ERR_INVALID_ARG);
|
||
|
|
gpio_set_level(i2s_lcd_drv->rs_io_num, LCD_CMD_LEV);
|
||
|
|
i2s_write_data(i2s_lcd_drv->i2s_lcd_obj, (uint8_t *)&cmd, i2s_lcd_drv->i2s_lcd_obj->width == 16 ? 2 : 1);
|
||
|
|
gpio_set_level(i2s_lcd_drv->rs_io_num, LCD_DATA_LEV);
|
||
|
|
return ESP_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
esp_err_t i2s_lcd_write(i2s_lcd_handle_t handle, const uint8_t *data, uint32_t length)
|
||
|
|
{
|
||
|
|
i2s_lcd_driver_t *i2s_lcd_drv = (i2s_lcd_driver_t *)handle;
|
||
|
|
I2S_CHECK(NULL != i2s_lcd_drv, "handle pointer invalid", ESP_ERR_INVALID_ARG);
|
||
|
|
i2s_write_data(i2s_lcd_drv->i2s_lcd_obj, (uint8_t*)data, length);
|
||
|
|
|
||
|
|
return ESP_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
esp_err_t i2s_lcd_acquire(i2s_lcd_handle_t handle)
|
||
|
|
{
|
||
|
|
i2s_lcd_driver_t *i2s_lcd_drv = (i2s_lcd_driver_t *)handle;
|
||
|
|
I2S_CHECK(NULL != i2s_lcd_drv, "handle pointer invalid", ESP_ERR_INVALID_ARG);
|
||
|
|
BaseType_t ret = xSemaphoreTake(i2s_lcd_drv->mutex, portMAX_DELAY);
|
||
|
|
I2S_CHECK(pdTRUE == ret, "Take semaphore failed", ESP_FAIL);
|
||
|
|
return ESP_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
esp_err_t i2s_lcd_release(i2s_lcd_handle_t handle)
|
||
|
|
{
|
||
|
|
i2s_lcd_driver_t *i2s_lcd_drv = (i2s_lcd_driver_t *)handle;
|
||
|
|
I2S_CHECK(NULL != i2s_lcd_drv, "handle pointer invalid", ESP_ERR_INVALID_ARG);
|
||
|
|
BaseType_t ret = xSemaphoreGive(i2s_lcd_drv->mutex);
|
||
|
|
I2S_CHECK(pdTRUE == ret, "Give semaphore failed", ESP_FAIL);
|
||
|
|
return ESP_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // CONFIG_IDF_TARGET_ESP32S2
|