From 7c1c0203c07f68e6a9be41847d09604518545a89 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Hru=C5=A1ka?= <ondra@ondrovo.com>
Date: Sun, 26 Dec 2021 18:47:35 +0100
Subject: [PATCH] wip, doesnt work

---
 main/app_main.c    |  2 +-
 main/co2_sensor.c  | 13 +++++++------
 main/periph_init.c | 43 ++++++++++++++++++++++++-------------------
 3 files changed, 32 insertions(+), 26 deletions(-)

diff --git a/main/app_main.c b/main/app_main.c
index df36aef..e3eb848 100644
--- a/main/app_main.c
+++ b/main/app_main.c
@@ -59,7 +59,7 @@ void app_main(void) {
 
     vTaskDelay(pdMS_TO_TICKS(1000));
 
-    xTaskCreatePinnedToCore(voc_read_task, "VOC", 4096, NULL, PRIO_NORMAL, NULL, 1);
+    //xTaskCreatePinnedToCore(voc_read_task, "VOC", 4096, NULL, PRIO_NORMAL, NULL, 1);
     xTaskCreatePinnedToCore(co2_read_task, "CO2", 4096, NULL, PRIO_NORMAL, NULL, 1);
    // xTaskCreate(co2_read_task, "CO2", 4096, NULL, PRIO_NORMAL, NULL);
 
diff --git a/main/co2_sensor.c b/main/co2_sensor.c
index 99a9d08..6586b73 100644
--- a/main/co2_sensor.c
+++ b/main/co2_sensor.c
@@ -31,10 +31,8 @@ void co2_read_task(void *param) {
     uint8_t buffer[128];
     
     while (1) {
-        
         vTaskDelay(pdMS_TO_TICKS(2000));
-        
-        
+
         uint16_t ppm = 0;
         
         int i = 0;
@@ -42,20 +40,23 @@ void co2_read_task(void *param) {
         buffer[i++] = 0x04;
         buffer[i++] = 0x00;
         buffer[i++] = 0x00;
+        
         buffer[i++] = 0x00;
         buffer[i++] = 0x04;
         buffer[i++] = 0xf8;
         buffer[i++] = 0xf0;
         
+        ESP_LOGI(TAG, "send %d bytes", i);
         uart_write_bytes(CO2_UART_NUM, buffer, i);
         i = uart_read_bytes(CO2_UART_NUM, buffer, 13, pdMS_TO_TICKS(1000));
+        ESP_LOGI(TAG, "received %d bytes", i);
+            
+        ESP_LOG_BUFFER_HEXDUMP(TAG, buffer, i, ESP_LOG_DEBUG);
         
         if (i != 13) {
             ESP_LOGE(TAG, "Rx failed");
             continue;
-        }
-        
-        ESP_LOG_BUFFER_HEXDUMP(TAG, buffer, i, ESP_LOG_DEBUG);
+        }        
         continue;
         
         
diff --git a/main/periph_init.c b/main/periph_init.c
index 809d473..b1b9ea0 100644
--- a/main/periph_init.c
+++ b/main/periph_init.c
@@ -61,24 +61,29 @@ esp_err_t periph_init() {
             return rv;
         }
 #else
-    const uart_config_t uart_config = {
-            .baud_rate = 9600,
-            .data_bits = UART_DATA_8_BITS,
-            .parity = UART_PARITY_DISABLE,
-            .stop_bits = UART_STOP_BITS_1,
-            .use_ref_tick = true
-    };
-    ESP_ERROR_CHECK( uart_param_config(UART_NUM_1, &uart_config) );
-    
-    // Set UART pins(TX: IO17 (UART2 default), RX: IO16 (UART2 default), RTS: IO18, CTS: IO19)
-    ESP_ERROR_CHECK(uart_set_pin(UART_NUM_2, 
-                                 CONFIG_PIN_I2C_SCL1,
-                                 CONFIG_PIN_I2C_SDA1, 
-                                 UART_PIN_NO_CHANGE, 
-                                 UART_PIN_NO_CHANGE));
-    
-    ESP_ERROR_CHECK(uart_driver_install(UART_NUM_1,
-        /* rxbuf */ 256, /* txbuf */ 0, /* que */ 0, /* uart que */ NULL, /* alloc flags */ 0));
+        int i2c_co2_port = I2C_NUM_1;
+        
+        const uart_config_t uart_config = {
+                .baud_rate = 9600,
+                .data_bits = UART_DATA_8_BITS,
+                .parity = UART_PARITY_DISABLE,
+                .stop_bits = UART_STOP_BITS_1,
+        .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
+        .source_clk = UART_SCLK_APB,
+                //.use_ref_tick = true
+        };
+        
+        ESP_ERROR_CHECK(uart_driver_install(i2c_co2_port,
+            /* rxbuf */ 256, /* txbuf */ 256, /* que */ 0, /* uart que */ NULL, /* alloc flags */ 0));
+        
+        ESP_ERROR_CHECK( uart_param_config(i2c_co2_port, &uart_config) );
+        
+        // Set UART pins(TX, RX, RTS, CTS)
+        ESP_ERROR_CHECK(uart_set_pin(i2c_co2_port, 
+                                    CONFIG_PIN_I2C_SCL1,
+                                    CONFIG_PIN_I2C_SDA1, 
+                                    UART_PIN_NO_CHANGE, 
+                                    UART_PIN_NO_CHANGE));
 #endif
     }
     
@@ -95,7 +100,7 @@ esp_err_t periph_init() {
             return rv;
         }
         
-        gpio_set_level(CONFIG_PIN_CO2_COMSEL, 0); // low=I2C
+        gpio_set_level(CONFIG_PIN_CO2_COMSEL, 1); // low=I2C
         gpio_set_level(CONFIG_PIN_CO2_EN, 1); // active high
     }