ZorkPeripherals

A library for all kind of different microcontroller peripheral devices (such as SPI-Flash, I2C-Displays) using common interfaces.

Supported Devices

• SPI-Display
  • ST7735 160 x 128
  • ILI9341 320 x 240
• I2C-Display
  • SSD1306 128x64 OLED
• Other
  • TLC59108 I2C LED Driver

How to Use

• Include the peripheral files you want to use. (ex. ST7735 Display)
• Implement all functions of the interface (ex. SPI, I2C) that the peripherals require
• Create a struct of the peripheral and supply the functions to it
• Call the initialize function, then you can use the library functions

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Example: ST7735 SPI Display

The display with the ST7735 uses 4 signals:

• SPI Clock
• SPI Data (MOSI)
• SPI Chip Select
• Register Select / Data Command

As such the following functions have to be implemented:

Function	Description
void Spi_Write(uint8_t* data, uint32_t length)	Writes length bytes pointed to by data on the SPI bus (MSB first), does not control the Chip Select Signal
void Spi_ChipSelect(bool assert)	(De-)Asserts the Chip Select Signal. true usually means setting the signal to low and vice versa
void Spi_CommandSelect(bool assert)	(De-)Asserts the Command Select Signal. true means the SPI transfer is a command, which usually means the signal is set to low and vice versa
void Spi_DelayMs(uint32_t ms)	Delays the execution of code for approximately ms milliseconds

Then create the device struct, supply the functions and call the initialize function.

ST7735 st;

st.f_write = Spi_Write;
st.f_cs = Spi_ChipSelect;
st.f_cmd = Spi_CommandSelect;
st.f_delay = Spi_DelayMs;

ST7735_Init(&st);

// Fill the entire screen in color black
ST7735_FillArea(&st, 0, 0, st->m_Width, st->m_Height, 0);