From 9cefc67cb28d1d641dad08af03ed42c625676d0f Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Thu, 23 Jul 2020 15:23:19 +0200
Subject: Configure i2c2 for display

---
 sw/picardy/src/main.rs | 53 +++++++++++++++++++++++++++++++++-----------------
 1 file changed, 35 insertions(+), 18 deletions(-)

diff --git a/sw/picardy/src/main.rs b/sw/picardy/src/main.rs
index b7b2dad..71c8475 100644
--- a/sw/picardy/src/main.rs
+++ b/sw/picardy/src/main.rs
@@ -32,7 +32,7 @@ use panic_semihosting as _;
 use stm32f1xx_hal::{
     prelude::*,
     pac,
-    i2c::{BlockingI2c, Mode},
+    i2c::{BlockingI2c, Mode, DutyCycle},
     delay::Delay,
     timer::{Timer},
 };
@@ -75,27 +75,22 @@ fn main() -> ! {
     let mut led = gpiob.pb14.into_push_pull_output(&mut gpiob.crh);
     led.set_low().unwrap();
 
-    loop {
-        led.toggle().unwrap();
-        delay.delay_ms(500u16);
-    }
-
     let c1 = gpioa.pa6;
     let c2 = gpioa.pa7;
 
     let qei = Timer::tim3(dp.TIM3, &clocks, &mut rcc.apb1)
         .qei((c1, c2), &mut afio.mapr);
 
-    // Configure I2C1 to be used for Si5351 and display
-    let scl = gpiob.pb6.into_alternate_open_drain(&mut gpiob.crl);
-    let sda = gpiob.pb7.into_alternate_open_drain(&mut gpiob.crl);
+    // Configure I2C2 for display
+    let scl2 = gpiob.pb10.into_alternate_open_drain(&mut gpiob.crh);
+    let sda2 = gpiob.pb11.into_alternate_open_drain(&mut gpiob.crh);
 
-    let i2c = BlockingI2c::i2c1(
-        dp.I2C1,
-        (scl, sda),
-        &mut afio.mapr,
-        Mode::Standard {
-            frequency: 100_000.hz(),
+    let i2c2 = BlockingI2c::i2c2(
+        dp.I2C2,
+        (scl2, sda2),
+        Mode::Fast {
+            frequency: 400_000.hz(),
+            duty_cycle: DutyCycle::Ratio2to1,
         },
         clocks,
         &mut rcc.apb1,
@@ -105,10 +100,10 @@ fn main() -> ! {
         /* data_timeout_us */ 1000,
     );
 
-    let i2c_busmanager = shared_bus::CortexMBusManager::new(i2c);
+    let i2c2_busmanager = shared_bus::CortexMBusManager::new(i2c2);
 
     const I2C_ADDRESS: u8 = 0b010_0000; // MCP23008, depending on solder bridges
-    let mut lcd = match HD44780::new_i2c_mcp23008(i2c_busmanager.acquire(), I2C_ADDRESS, &mut delay) {
+    let mut lcd = match HD44780::new_i2c_mcp23008(i2c2_busmanager.acquire(), I2C_ADDRESS, &mut delay) {
         Ok(lcd) => lcd,
         Err(_) => panic!("HD44780 init fail"),
     };
@@ -125,7 +120,29 @@ fn main() -> ! {
     lcd.set_cursor_pos(0, &mut delay).unwrap();
     lcd.write_str("Hello, world!", &mut delay).unwrap();
 
-    //let mut siclock = si_clock::SiClock::new(i2c_busmanager.acquire());
+
+    /*
+    // Configure I2C1 to be used for Si5351
+    let scl = gpiob.pb6.into_alternate_open_drain(&mut gpiob.crl);
+    let sda = gpiob.pb7.into_alternate_open_drain(&mut gpiob.crl);
+
+    let i2c = BlockingI2c::i2c1(
+        dp.I2C1,
+        (scl, sda),
+        &mut afio.mapr,
+        Mode::Standard {
+            frequency: 100_000.hz(),
+        },
+        clocks,
+        &mut rcc.apb1,
+        /* start_timeout_us */ 1000,
+        /* start_retries */ 10,
+        /* addr_timeout_us */ 1000,
+        /* data_timeout_us */ 1000,
+    );
+    let i2c_busmanager = shared_bus::CortexMBusManager::new(i2c);
+    let mut siclock = si_clock::SiClock::new(i2c_busmanager.acquire());
+    */
 
     lcd.set_cursor_pos(0, &mut delay).unwrap();
     lcd.write_str("Clocks set.     ", &mut delay).unwrap();
-- 
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