[iot/goam] Rough display initialization

4 files changed, 45 insertions, 0 deletions

diff --git a/Year 3/Internet of things/goam/main/CMakeLists.txt b/Year 3/Internet of things/goam/main/CMakeLists.txt
index c4fd248..656f4cb 100644
--- a/Year 3/Internet of things/goam/main/CMakeLists.txt
+++ b/Year 3/Internet of things/goam/main/CMakeLists.txt
@@ -1,4 +1,5 @@
 idf_component_register(SRCS "main.c"
                             "ptc06.c"
                             "buttons.c"
+                            "display.c"
                        INCLUDE_DIRS "")
diff --git a/Year 3/Internet of things/goam/main/display.c b/Year 3/Internet of things/goam/main/display.c
new file mode 100644
index 0000000..7a77910
--- /dev/null
+++ b/Year 3/Internet of things/goam/main/display.c
@@ -0,0 +1,39 @@
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+#include "driver/i2c.h"
+#include "display.h"
+
+#define SCL_IO_PIN 19
+#define SDA_IO_PIN 18
+#define MASTER_FREQUENCY CONFIG_I2C_MASTER_FREQUENCY
+
+static void i2c_init() {
+	i2c_config_t conf = {
+		.mode = I2C_MODE_MASTER,
+		.sda_io_num = SDA_IO_PIN,
+		.scl_io_num = SCL_IO_PIN,
+		.sda_pullup_en = GPIO_PULLUP_ENABLE,
+		.scl_pullup_en = GPIO_PULLUP_ENABLE,
+		.master.clk_speed = 400000, // 4kHz; at least 385kHz
+	};
+	i2c_param_config(I2C_NUM_0, &conf);
+	i2c_driver_install(I2C_NUM_0, I2C_MODE_MASTER, 0, 0, 0);
+	i2c_set_start_timing(I2C_NUM_0, 10, 10);
+}
+
+static void i2c_send() {
+	i2c_cmd_handle_t i2c_handle = i2c_cmd_link_create();
+	ESP_ERROR_CHECK(i2c_master_start(i2c_handle));
+	ESP_ERROR_CHECK(i2c_master_write_byte(i2c_handle, 0b01111000, true));
+	char data[] = { 0x00, 0x8D, 0x14, 0xAF, 0xA7 };
+	ESP_ERROR_CHECK(i2c_master_write(i2c_handle, (const unsigned char*)data, sizeof(data), true));
+	ESP_ERROR_CHECK(i2c_master_stop(i2c_handle));
+	ESP_ERROR_CHECK(i2c_master_cmd_begin(I2C_NUM_0, i2c_handle, 1000));
+	i2c_cmd_link_delete(i2c_handle);
+}
+
+void display_init() {
+	i2c_init();
+	i2c_send();
+}
diff --git a/Year 3/Internet of things/goam/main/display.h b/Year 3/Internet of things/goam/main/display.h
new file mode 100644
index 0000000..d796bd7
--- /dev/null
+++ b/Year 3/Internet of things/goam/main/display.h
@@ -0,0 +1,3 @@
+#pragma once
+
+void display_init();
diff --git a/Year 3/Internet of things/goam/main/main.c b/Year 3/Internet of things/goam/main/main.c
index ce87b7b..232bfdc 100644
--- a/Year 3/Internet of things/goam/main/main.c
+++ b/Year 3/Internet of things/goam/main/main.c
@@ -16,6 +16,7 @@
 #include "driver/uart.h"
 #include "ptc06.h"
 #include "buttons.h"
+#include "display.h"
 
 void print_chip_data() {
 	/* Print chip information */
@@ -65,6 +66,7 @@ void app_main(void)
 
 	buttons_init();
 	add_push_button(BTN_SHOOT_PIN, take_photo, NULL);
+	display_init();
 
 	for (int i = 0; true; i++) {
 		/* ptc06_reset(); */