本帖最后由 ddllxxrr 于 2015-3-2 20:33 编辑
在Atmle Studio6.2环境中插入开发板，则自动弹出开发板界面，这时可直接打开例程。
今天的例程是这样，让用户按键，每按下一个键输出的时钟都会改变，大概按四次左右，又恢复起始状态。
这里是判断按键按下和抬起的函数：
- static void wait_for_switches(void)
- {
- do {
- } while (ioport_get_pin_level(GPIO_PUSH_BUTTON_1));
- mdelay(1);
- do {
- } while (!ioport_get_pin_level(GPIO_PUSH_BUTTON_1));
- mdelay(1);
- }
- enum genclk_source {
- GENCLK_PCK_SRC_SLCK_RC = 0, //!< Internal 32kHz RC oscillator as PCK source clock
- GENCLK_PCK_SRC_SLCK_XTAL = 1, //!< External 32kHz crystal oscillator as PCK source clock
- GENCLK_PCK_SRC_SLCK_BYPASS = 2, //!< External 32kHz bypass oscillator as PCK source clock
- GENCLK_PCK_SRC_MAINCK_4M_RC = 3, //!< Internal 4MHz RC oscillator as PCK source clock
- GENCLK_PCK_SRC_MAINCK_8M_RC = 4, //!< Internal 8MHz RC oscillator as PCK source clock
- GENCLK_PCK_SRC_MAINCK_12M_RC = 5, //!< Internal 12MHz RC oscillator as PCK source clock
- GENCLK_PCK_SRC_MAINCK_XTAL = 6, //!< External crystal oscillator as PCK source clock
- GENCLK_PCK_SRC_MAINCK_BYPASS = 7, //!< External bypass oscillator as PCK source clock
- GENCLK_PCK_SRC_PLLACK = 8, //!< Use PLLACK as PCK source clock
- GENCLK_PCK_SRC_MCK = 9, //!< Use Master Clk as PCK source clock
- };
运行结果当我按下板子上的KEY0键时，PA6刚开始是系统时钟，然后减半，然后又是一个新时钟，接着又是外新时钟。然后回到开始。
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