问答

[color=rgb(68, 68, 68)][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]用Work_Bench创建了一个AT的工程，在做实验时能遇到一些问题，以后慢慢提问并解决。如果解决了，会将代码放上一起学习。[/size][/font][/backcolor][/color] [color=rgb(68, 68, 68)][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]四、DAC问题，初始化代码没有问题，初始化代码如下：[/size][/font][/backcolor][/color][font=Tahoma, Microsoft Yahei, Simsun][color=#444444][backcolor=rgb(242, 249, 253)][size=16px]void wk_dac_init(void) { /* add user code begin dac_init 0 */ /* add user code end dac_init 0 */ gpio_init_type gpio_init_struct; gpio_default_para_init(&gpio_init_struct); /* add user code begin dac_init 1 */ /* add user code end dac_init 1 */ /*gpio------------------------------------------------------------------------------*/ /* configure the OUT1 pin */ gpio_init_struct.gpio_pins = DAC1_PIN; gpio_init_struct.gpio_mode = GPIO_MODE_ANALOG; gpio_init_struct.gpio_pull = GPIO_PULL_NONE; gpio_init(DAC1_GPIO_PORT, &gpio_init_struct); /* configure the OUT2 pin */ gpio_init_struct.gpio_pins = DAC2_PIN; gpio_init_struct.gpio_mode = GPIO_MODE_ANALOG; gpio_init_struct.gpio_pull = GPIO_PULL_NONE; gpio_init(DAC2_GPIO_PORT, &gpio_init_struct); /*dac OUT1 init--------------------------------------------------------------------*/ dac_trigger_enable(DAC1_SELECT, TRUE); dac_trigger_select(DAC1_SELECT, DAC_SOFTWARE_TRIGGER); dac_wave_generate(DAC1_SELECT, DAC_WAVE_GENERATE_TRIANGLE); /*Triangular amplitude select------------------------------------------------------*/ dac_mask_amplitude_select(DAC1_SELECT, DAC_LSFR_BITB0_AMPLITUDE_4095);//DAC_LSFR_BIT10_AMPLITUDE_3);// dac_output_buffer_enable(DAC1_SELECT, TRUE); dac_dma_enable(DAC1_SELECT, TRUE); dac_enable(DAC1_SELECT, TRUE); /*dac OUT2 init--------------------------------------------------------------------*/ dac_trigger_enable(DAC2_SELECT, TRUE); dac_trigger_select(DAC2_SELECT, DAC_SOFTWARE_TRIGGER); dac_wave_generate(DAC2_SELECT, DAC_WAVE_GENERATE_TRIANGLE); /*Triangular amplitude select------------------------------------------------------*/ dac_mask_amplitude_select(DAC2_SELECT, DAC_LSFR_BITA0_AMPLITUDE_2047);//DAC_LSFR_BIT90_AMPLITUDE_1023);//DAC_LSFR_BIT20_AMPLITUDE_7);// dac_output_buffer_enable(DAC2_SELECT, TRUE); dac_enable(DAC2_SELECT, TRUE); /* add user code begin dac_init 2 */ /* add user code end dac_init 2 */ } 初始化后PA_4，PA_5没有动静，将这两行放入一段代码中， dac_software_trigger_generate(DAC1_SELECT); dac_software_trigger_generate(DAC2_SELECT); DAC三角波就出来了，速度非常慢，我选择的是软件触发，就将这两行放到AT32F403a_407_int.c中的tick函数中，结果是能出来稍快一点的三角波，并且比较圆滑。看厂家提供的工程是采用time2触发DAC，如果仅仅用软件触发我的方法肯定不对，但应该如何写呢？ 谢谢 [/size][/backcolor][/color][/font]