more work

life update yes I did get an icecream. it wasn't very good tho

CMakeLists.txt

@@ -19,6 +19,7 @@ cmake_minimum_required(VERSION 3.13)
 include(pico_sdk_import.cmake)
 
 project(dp)
+set(CMAKE_CXX_FLAGS "-O3 -Wall -Wextra")
 
 # initialize the Raspberry Pi Pico SDK
 pico_sdk_init()

include/bt4502.h

@@ -0,0 +1 @@
+int bt_initialize();

include/constants.h

@@ -4,4 +4,6 @@
 #define SCREEN_WIDTH 240
 #define SCREEN_HEIGHT 360
 
+#define BT_NAME "pico bt display"
+
 #endif

include/st7789_lcd.h

@@ -1,3 +1,4 @@
+void lcd_backlight(bool enabled);
 void lcd_start_pixels();
 void lcd_end_pixels();
 void lcd_put_rgb(uint8_t r, uint8_t g, uint8_t b);

src/bt4502.c

@@ -0,0 +1,57 @@
+#include <string.h>
+#include "hardware/gpio.h"
+#include "hardware/uart.h"
+
+#include "constants.h"
+
+#define PIN_TX 21 // rxd on module
+#define PIN_RX 22 // txd on module
+#define PIN_WAKE 18
+#define PIN_PDN 19
+#define PIN_INT 20
+
+#define UART uart0
+
+static void interrupt_callback() {
+    // TODO
+}
+
+static inline void initialize_pins() {
+    gpio_init(PIN_WAKE);
+    gpio_set_dir(PIN_WAKE, GPIO_OUT);
+    gpio_put(PIN_WAKE, 1);
+
+    gpio_init(PIN_PDN);
+    gpio_set_dir(PIN_PDN, GPIO_OUT);
+    gpio_put(PIN_PDN, 0);
+
+    gpio_init(PIN_INT);
+    gpio_set_dir(PIN_INT, GPIO_IN);
+    gpio_set_irq_enabled_with_callback(PIN_INT, GPIO_IRQ_EDGE_FALL, true, &interrupt_callback);
+
+    uart_init(UART, 115200);
+    gpio_set_function(PIN_TX, GPIO_FUNC_UART);
+    gpio_set_function(PIN_RX, GPIO_FUNC_UART);
+
+}
+
+int bt_initialize() {
+    initialize_pins();
+
+    char ren_cmd[11 + sizeof(BT_NAME)];
+    strcpy(ren_cmd, "TTM:REN-");
+    strcat(ren_cmd, BT_NAME);
+    strcat(ren_cmd, "\r\n\0");
+
+    uart_puts(UART, ren_cmd);
+
+    char resp[11];
+    uart_read_blocking(UART, resp, 11);
+
+    if (strcmp(resp, "TTM:OK\r\n\0") != 0) {
+        uart_read_blocking(UART, NULL, 1);
+        return 1;
+    }
+    
+    return 0;
+}

src/main.c

@@ -1,15 +1,18 @@
 #include "hardware/gpio.h"
+#include "pico/stdlib.h"
 
 #include "constants.h"
 #include "st7789_lcd.h"
-
+#include "bt4502.h"
-
 
 int main() {
     gpio_init(PICO_DEFAULT_LED_PIN);
     gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
 
     lcd_initialize();
+    if (bt_initialize() != 0) {
+        return 1;
+    }
 
     lcd_start_pixels();
     for (int y = 0; y < SCREEN_HEIGHT; ++y) {
@@ -23,4 +26,6 @@ int main() {
     lcd_end_pixels();
 
     gpio_put(PICO_DEFAULT_LED_PIN, 1);
+    sleep_ms(1000);
+    lcd_backlight(0);
 }

src/st7789_lcd.c

@@ -87,6 +87,10 @@ static inline void initialize_pins() {
     gpio_put(PIN_BL, 1);
 }
 
+void lcd_backlight(bool enabled) {
+    gpio_put(PIN_BL, enabled);
+}
+
 void lcd_start_pixels() {
     uint8_t cmd = 0x2c; // RAMWR
     lcd_write_cmd(&cmd, 1);