From ca1431d1398ff10f1eb9a7439c943019a560e261 Mon Sep 17 00:00:00 2001
From: Per Lindgren <per.lindgren@ltu.se>
Date: Sun, 21 Feb 2021 15:13:11 +0100
Subject: [PATCH] test of i2c->spi wip2, id works
---
examples/rtt_rtic_i2c.rs | 27 ++++++++++++++++++++++-----
1 file changed, 22 insertions(+), 5 deletions(-)
diff --git a/examples/rtt_rtic_i2c.rs b/examples/rtt_rtic_i2c.rs
index fe4f842..cfe131e 100644
--- a/examples/rtt_rtic_i2c.rs
+++ b/examples/rtt_rtic_i2c.rs
@@ -5,6 +5,7 @@
#![no_main]
#![no_std]
+use cortex_m::asm::delay;
use panic_halt as _;
use rtt_target::{rprintln, rtt_init_print};
@@ -67,18 +68,34 @@ const APP: () = {
let i2c_command_conf = 0xF0;
let i2c_conf_reg = (0b0 << 5) /* MSB First */ |
- (0b10 << 2) /* Mode 3 */ |
+ (0b11 << 2) /* Mode 3 */ |
(0b00 << 0) /* 1843 kHz */;
+ // (0b01 << 0) /* 461 kHz */;
let x = i2c.write(i2c_addr, &[i2c_command_conf, i2c_conf_reg]);
rprintln!("configure {:?}", x);
+ cortex_m::asm::delay(100_000);
// write to spi with CS0 (command 01..0f)
let i2c_command_cs0 = 0x01; // bit 0 set
- loop {
- let x = i2c.write(i2c_addr, &[i2c_command_cs0, 0x00, 0xFF, 0xFF, 0xFF]);
- rprintln!("data {:?}", x);
- }
+ let pmw_command_product_id = 0x00;
+
+ let x = i2c.write(i2c_addr, &[i2c_command_cs0, pmw_command_product_id]);
+ rprintln!("request product_id {:?}", x);
+ cortex_m::asm::delay(10000);
+
+ // send an extra byte, to actually read (data can be 0)
+ let x = i2c.write(i2c_addr, &[i2c_command_cs0, 0x00u8]);
+ // read the buffer
+ cortex_m::asm::delay(10000);
+
+ // read the result
+ let mut buff = [0u8, 1];
+ let x = i2c.read(i2c_addr, &mut buff);
+ // read the buffer
+ cortex_m::asm::delay(10000);
+ rprintln!("data received {:?}", x);
+ rprintln!("data received {:?}", buff);
}
#[idle]
--
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