From 8c3f7c70cc48f9017b2148a6aa9674ce21e3ff95 Mon Sep 17 00:00:00 2001
From: Frederik Menke <frederik.menke@rwth-aachen.de>
Date: Sat, 20 Jul 2024 16:52:28 +0200
Subject: [PATCH] Set up communication with sensor

---
 src/main.rs | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/src/main.rs b/src/main.rs
index 457566f..895ee74 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -22,7 +22,6 @@ use {defmt_rtt as _, panic_probe as _};
 
 use embassy_rp::i2c::{self, Config};
 use embassy_time::{Duration, Timer};
-use embedded_hal_async::i2c::I2c;
 
 bind_interrupts!(struct Irqs {
    I2C1_IRQ  => i2c::InterruptHandler<embassy_rp::peripherals::I2C1>;
@@ -30,6 +29,11 @@ bind_interrupts!(struct Irqs {
 
 struct DummyTimesource();
 
+/// I2C Address of the co2 sensor
+const CCS811_I2C_ADDRESS: u16 = 0x5A;
+/// I2C Register addresses of the co2 sensor
+const CCS811_REGISTER_STATUS: u8 = 0x00;
+
 impl embedded_sdmmc::TimeSource for DummyTimesource {
     fn get_timestamp(&self) -> embedded_sdmmc::Timestamp {
         embedded_sdmmc::Timestamp {
@@ -52,12 +56,30 @@ async fn main(spawner: Spawner) {
     //     .spawn(write_to_sd(p.SPI1, p.PIN_10, p.PIN_11, p.PIN_12, p.PIN_16))
     //     .unwrap();
 
+    // Wake pin is not required as long as its kept low at all times
+    // let mut nWAKE = gpio::Output::new(p.PIN_13, Level::High);
+
     let sda = p.PIN_14;
     let scl = p.PIN_15;
 
     info!("set up i2c ");
     let mut i2c = embassy_rp::i2c::I2c::new_async(p.I2C1, scl, sda, Irqs, Config::default());
 
+    // Wait for sensor to boot
+    Timer::after(Duration::from_secs(1)).await;
+
+    debug!("Writing to I2C");
+    let mut status = [42];
+    i2c.write_async(CCS811_I2C_ADDRESS, [CCS811_REGISTER_STATUS])
+        .await
+        .unwrap();
+    debug!("Reading from I2C");
+    i2c.read_async(CCS811_I2C_ADDRESS, &mut status)
+        .await
+        .unwrap();
+
+    info!("Reported status: {}", status);
+
     debug!("TASK ENDED: Main")
 }