mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-06-01 12:01:37 +02:00
Kevin Thomas
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/**
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******************************************************************************
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* @file main.c
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* @author Kevin Thomas
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* @brief I2C demonstration: scan all 7-bit addresses and report devices.
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*
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* Demonstrates I2C bus scanning using the bare-metal I2C driver.
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* I2C1 is configured at 100 kHz on SDA=GPIO2 / SCL=GPIO3. A
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* formatted hex table of all responding device addresses is
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* printed over UART and repeated every 5 seconds.
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*
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* Wiring:
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* GPIO0 -> UART TX (USB-to-UART adapter RX)
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* GPIO1 -> UART RX (USB-to-UART adapter TX)
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* GPIO2 -> I2C device SDA (4.7 kohm pull-up to 3.3 V)
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* GPIO3 -> I2C device SCL (4.7 kohm pull-up to 3.3 V)
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* 3.3V -> I2C device VCC
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* GND -> I2C device GND
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*
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2026 Kevin Thomas.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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#include "rp2350_i2c.h"
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#include "rp2350_uart.h"
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#include "rp2350_xosc.h"
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#include "rp2350_delay.h"
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#define SCAN_DELAY_MS 5000
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/**
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* @brief Application entry point for the I2C bus scanner demo.
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* @retval int does not return
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*/
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int main(void)
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{
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xosc_set_clk_ref();
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i2c_release_reset();
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i2c_init();
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uart_puts("I2C driver initialized: I2C1 @ 100 kHz SDA=GPIO2 SCL=GPIO3\r\n");
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while (1) {
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i2c_scan();
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delay_ms(SCAN_DELAY_MS);
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}
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}
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