// 1. Enable the peripheral clock EnableClock(config->port);
For I2C and SPI, driver work becomes more complex, requiring state machines for master/slave modes, clock generation, and error handling (NAK, arbitration loss). jxmcu driver work
The hardest part of driver work is the bitwise operations. The CTRL register wasn't just one switch; it was a dozen switches packed into a single 32-bit integer. For I2C and SPI
Provides simple APIs like UART_SendString() and UART_ReadByte() . driver work becomes more complex
They typically support automatic adaptation for data speeds ranging from 300 bps to 1 Mbps .
// Cast addresses to structures #define GPIOA ((GPIO_TypeDef *) GPIOA_BASE) #define GPIOB ((GPIO_TypeDef *) GPIOB_BASE) #define GPIOC ((GPIO_TypeDef *) GPIOC_BASE) #define RCC ((RCC_TypeDef *) RCC_BASE)