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[doc][dac] update dac demo readme

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jzlv 2021-11-10 16:49:40 +08:00
parent 1ad8786877
commit de9ab77abc
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5
examples/dac/dac_dma/readme.md
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@ -1,3 +1,8 @@
- 将 **CONFIG_GPIO11_FUNC** 设置成 **GPIO_FUN_DAC**
- 如果使用外部参考电压，将 **CONFIG_GPIO7_FUNC** 设置成 **GPIO_FUN_ADC**
- 设置 **BSP_DAC_CLOCK_SOURCE** 为 **ROOT_CLOCK_SOURCE_AUPLL_24000000_HZ**
- 设置 **BSP_DAC_CLOCK_DIV** 为 **2**，能够得到500KHZ
```bash
$ make APP=dac_dma BOARD=bl706_iot

5
examples/dac/dac_mono_play_form_flash/readme.md
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@ -1,3 +1,8 @@
- 将 **CONFIG_GPIO11_FUNC** 设置成 **GPIO_FUN_DAC**
- 如果使用外部参考电压，将 **CONFIG_GPIO7_FUNC** 设置成 **GPIO_FUN_ADC**
- 设置 **BSP_DAC_CLOCK_SOURCE** 为 **ROOT_CLOCK_SOURCE_AUPLL_12288000_HZ**
- 设置 **BSP_DAC_CLOCK_DIV** 为 **23**，能够得到16KHZ
```bash
$ make APP=dac_mono_play_form_flash BOARD=bl706_iot

5
examples/dac/dac_poll/readme.md
View file

@ -1,3 +1,8 @@
- 将 **CONFIG_GPIO11_FUNC** 设置成 **GPIO_FUN_DAC**
- 如果使用外部参考电压，将 **CONFIG_GPIO7_FUNC** 设置成 **GPIO_FUN_ADC**
- 设置 **BSP_DAC_CLOCK_SOURCE** 为 **ROOT_CLOCK_SOURCE_AUPLL_24000000_HZ**
- 设置 **BSP_DAC_CLOCK_DIV** 为 **2**，能够得到500KHZ
```bash
$ make APP=dac_poll BOARD=bl706_iot