Add support for channel selection

1 files changed, 41 insertions, 0 deletions

diff --git a/tests/mux_i2c.rs b/tests/mux_i2c.rs
new file mode 100644
index 0000000..95f97a5
--- /dev/null
+++ b/tests/mux_i2c.rs
@@ -0,0 +1,41 @@
+#[macro_use(block)]
+extern crate nb;
+extern crate embedded_hal;
+extern crate embedded_hal_mock as hal;
+use hal::i2c::Transaction as I2cTrans;
+extern crate ads1x1x;
+use ads1x1x::channel;
+
+#[macro_use]
+mod common;
+use common::{ new_ads1015 as new, destroy_ads1015 as destroy,
+              DEVICE_ADDRESS as DEV_ADDR, Register, BitFlags as BF, Config };
+
+use embedded_hal::adc::OneShot;
+
+macro_rules! mux_test {
+    ($name:ident, $CS:ident, $config_bits:expr) => {
+        #[test]
+        fn $name() {
+            let default_config = Config::default();
+            let config = Config::default().with_high(BF::OS).with_high($config_bits);
+            let transactions = [ I2cTrans::write_read(DEV_ADDR, vec![Register::CONFIG], vec![default_config.msb(), default_config.lsb()]),
+                                 I2cTrans::write(DEV_ADDR, vec![Register::CONFIG, config.msb(), config.lsb()]),
+                                 I2cTrans::write_read(DEV_ADDR, vec![Register::CONFIG], vec![config.msb(), config.lsb()]),
+                                 I2cTrans::write_read(DEV_ADDR, vec![Register::CONVERSION], vec![0x80, 0x00] ) ];
+            let mut dev = new(&transactions);
+            let measurement = block!(dev.read(&mut channel::$CS)).unwrap();
+            assert_eq!(-2048, measurement);
+            destroy(dev);
+        }
+    };
+}
+
+mux_test!(diffa0a1, DifferentialA0A1, 0);
+mux_test!(diffa0a3, DifferentialA0A3, BF::MUX0);
+mux_test!(diffa1a3, DifferentialA1A3, BF::MUX1);
+mux_test!(diffa2a3, DifferentialA2A3, BF::MUX1 | BF::MUX0);
+mux_test!(singlea0, SingleA0, BF::MUX2);
+mux_test!(singlea1, SingleA1, BF::MUX2 | BF::MUX0);
+mux_test!(singlea2, SingleA2, BF::MUX2 | BF::MUX1);
+mux_test!(singlea3, SingleA3, BF::MUX2 | BF::MUX1 | BF::MUX0);