Difference between revisions of "CH32V307"
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* [http://wch-ic.com/downloads/file/262.html?time=2022-06-08%2000:02:47&code=WzZMnejfNpLPWjULTKIJgnHgBBt3toKKi1ZTdFxZ CH549 Datasheet] | * [http://wch-ic.com/downloads/file/262.html?time=2022-06-08%2000:02:47&code=WzZMnejfNpLPWjULTKIJgnHgBBt3toKKi1ZTdFxZ CH549 Datasheet] | ||
* [https://github.com/openwch?tab=repositories OpenWCH] | * [https://github.com/openwch?tab=repositories OpenWCH] | ||
| + | |||
| + | == Notes == | ||
| + | === DAC === | ||
| + | |||
| + | * The output impedance is a concern. Without the Output Buffer enabled, >100kohm impedance for the load is recommended. Even WITH Output Buffer enabled, a 1kohm load is not really possible, both high and low end of range is not reached, which is a bit strange. 10kohm hasn't been tested yet. | ||
| + | |||
| + | * For fastest write to DAC output, this is used; | ||
| + | <nowiki> | ||
| + | DAC->RD12BDHR = dac_value1 + (dac_value2 << 16); | ||
| + | </nowiki> | ||
| + | |||
| + | * Simple initialization is; | ||
| + | <nowiki> | ||
| + | RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE ); | ||
| + | |||
| + | DAC_InitTypeDef DAC_InitType={0}; | ||
| + | DAC_InitType.DAC_Trigger=DAC_Trigger_None; | ||
| + | DAC_InitType.DAC_WaveGeneration=DAC_WaveGeneration_None; | ||
| + | DAC_InitType.DAC_OutputBuffer=DAC_OutputBuffer_Enable; | ||
| + | DAC_Init(DAC_Channel_1,&DAC_InitType); | ||
| + | DAC_Init(DAC_Channel_2,&DAC_InitType); | ||
| + | |||
| + | DAC_Cmd(DAC_Channel_1, ENABLE); | ||
| + | DAC_Cmd(DAC_Channel_2, ENABLE); | ||
| + | </nowiki> | ||
Revision as of 20:24, 2 July 2022
Miscellaneous Links
Notes
DAC
- The output impedance is a concern. Without the Output Buffer enabled, >100kohm impedance for the load is recommended. Even WITH Output Buffer enabled, a 1kohm load is not really possible, both high and low end of range is not reached, which is a bit strange. 10kohm hasn't been tested yet.
- For fastest write to DAC output, this is used;
DAC->RD12BDHR = dac_value1 + (dac_value2 << 16);
- Simple initialization is;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE );
DAC_InitTypeDef DAC_InitType={0};
DAC_InitType.DAC_Trigger=DAC_Trigger_None;
DAC_InitType.DAC_WaveGeneration=DAC_WaveGeneration_None;
DAC_InitType.DAC_OutputBuffer=DAC_OutputBuffer_Enable;
DAC_Init(DAC_Channel_1,&DAC_InitType);
DAC_Init(DAC_Channel_2,&DAC_InitType);
DAC_Cmd(DAC_Channel_1, ENABLE);
DAC_Cmd(DAC_Channel_2, ENABLE);