Improve I2C LCD example #675
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lurch
reviewed
Jul 19, 2025
lurch
reviewed
Jul 19, 2025
i2c/lcd_1602_i2c/i2c_lcd.h
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| void i2c_lcd_writeString(i2c_lcd_handle inst, char* string); | ||
| void i2c_lcd_writeStringf(i2c_lcd_handle inst, const char* __restrict format, ...) _ATTRIBUTE ((__format__ (__printf__, 2, 3))); | ||
| void i2c_lcd_writeChar(i2c_lcd_handle inst, char c); | ||
| void i2c_lcd_writeLines(i2c_lcd_handle inst, char* line1, char* line2); |
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This function-signature seems to be assuming that you're using a 16x2 LCD, and precludes the usage of a 20x4 LCD?
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That's correct. The example name specifically says it's for 16x2. I also don't have 20x4 hardware to validate against.
lurch
reviewed
Jul 19, 2025
lurch
reviewed
Jul 19, 2025
lurch
reviewed
Jul 19, 2025
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This PR improve the I2C LCD example in the following ways:
The following article was used as a reference for timing: https://web.alfredstate.edu/faculty/weimandn/lcd/lcd_initialization/lcd_initialization_index.html
This code has been tested on real hardware with a Pi Pico.
Fixes #654
Fixes #597