Use HZ parameter. Set to 1 for 1 tick per second.

Use correct macros for prescaler reg positions.

Target proper UART, target black pill F401 board.

Use STlink programmer config.

Use generic f401xc naming.

Add definitions for F401CC MCU and Black Pill board.

Increase Dhrystone runs to 10M.

Fix incorrect FLASH_ACR WS macro.

Fix wrong register position macros.

Update Dhrystone example for USART 2. Target F103.

Change to internal gettimeofday function. Use C linkage.

Adjust RTC test for new setTime call. Tested F1 and F4.

Perform BCD conversion for non-F1 RTCs when setting time.

Tweak RTC test for BCD-only with non-F1 RTCs.

Add missing character for F1.