mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-06-01 03:51:42 +02:00
Kevin Thomas
c46bcba401
Public function docstrings belong exclusively in .h headers per coding convention. Only static helper functions and static variables retain docstrings in .c files. Removed 413 duplicate docstrings across 185 files (15 CBM + 15 C SDK projects). All 30 projects rebuild with zero errors.
66 lines
2.4 KiB
C
66 lines
2.4 KiB
C
/**
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* @file 0x07_i2c.c
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* @brief I2C demonstration: scan all 7-bit addresses and report devices
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* @author Kevin Thomas
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* @date 2025
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*
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* MIT License
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*
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* Copyright (c) 2025 Kevin Thomas
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* -----------------------------------------------------------------------------
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*
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* Demonstrates I2C bus scanning using the i2c driver (i2c.h / i2c.c). I2C1
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* is configured at 100 kHz on SDA=GPIO2 / SCL=GPIO3. A formatted hex table
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* of all responding device addresses is printed over UART and repeated
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* every 5 seconds.
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*
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* Wiring:
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* GPIO2 (SDA) -> I2C device SDA (4.7 kohm pull-up to 3.3 V recommended)
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* GPIO3 (SCL) -> I2C device SCL (4.7 kohm pull-up to 3.3 V recommended)
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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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#include <stdio.h>
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#include "pico/stdlib.h"
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#include "i2c.h"
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/** @brief I2C port number (0 or 1) */
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#define I2C_PORT 1
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/** @brief GPIO pin for I2C SDA */
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#define I2C_SDA_PIN 2
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/** @brief GPIO pin for I2C SCL */
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#define I2C_SCL_PIN 3
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/** @brief I2C bus clock rate in Hz */
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#define I2C_BAUD 100000
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int main(void) {
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stdio_init_all();
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i2c_driver_init(I2C_PORT, I2C_SDA_PIN, I2C_SCL_PIN, I2C_BAUD);
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printf("I2C driver initialized: I2C%d @ %d Hz SDA=GPIO%d SCL=GPIO%d\r\n",
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I2C_PORT, I2C_BAUD, I2C_SDA_PIN, I2C_SCL_PIN);
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while (true) {
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i2c_driver_scan(I2C_PORT);
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sleep_ms(5000);
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}
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}
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