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在 TM4C123GH6PM 数据表中、设置 i2c 时钟速度的公式为:
SCL_PERIOD = 2×(1 + TIMER_PRD)×(SCL_LP + SCL_HP)×CLK_PRD
我对 SCL_LP 和 SCL_HP 感到困惑,数据表显示:
SCL_LP 是 SCL 的低电平阶段(固定为6)
SCL_HP 是 SCL 的高电平阶段(固定为4)
但是如果它们是固定的,如何更改时钟速度?
是否有人可以解释 SCL_LP 和 SCL_HP 的真正含义?