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Alexander Potashev authored
* Clone the board-specific files from those used for the STM3220G-EVAL board. * Change STM3220G-EVAL to STM3240G-EVAL where appropriate. * cpu/arm_cortexm3/stm32/clock.c: Add support for clock rates up to 168 MHz. * Ethernet driver: Implement us/ms delays not tied to CPU clock rate. * Ethernet driver: Add `stm_phy_wait_busy()` to reduce code duplication. * Raise system clock rate from 120 MHz to 168 MHz. * Update PSRAM timings. * Disable the PSRAM Synchronous Burst Mode.
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