Add configurable internal pullups for rp i2c

- Example updated to demonstrate enabling internal pullups
- Add `sda_pullup` and `scl_pullup` fields to I2C Config

1 files changed, 5 insertions, 1 deletions

diff --git a/examples/rp/src/bin/i2c_blocking.rs b/examples/rp/src/bin/i2c_blocking.rs
index c9c8a2760..6a57ded20 100644
--- a/examples/rp/src/bin/i2c_blocking.rs
+++ b/examples/rp/src/bin/i2c_blocking.rs
@@ -49,7 +49,11 @@ async fn main(_spawner: Spawner) {
     let scl = p.PIN_15;
 
     info!("set up i2c ");
-    let mut i2c = i2c::I2c::new_blocking(p.I2C1, scl, sda, Config::default());
+    let mut config = Config::default();
+    // by default internal pullup resitors are disabled
+    config.sda_pullup = true;
+    config.scl_pullup = true;
+    let mut i2c = i2c::I2c::new_blocking(p.I2C1, scl, sda, config);
 
     use mcp23017::*;