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標題: STM32英文版ADC編程思路 [打印本頁]

作者: Cliff 時間: 2018-1-10 21:51
標題: STM32英文版ADC編程思路

STM32平臺完成一次ADC芯片的編程的過程對于一個菜鳥來說實在可怕

Power-up;

Delayto allow power supplies to settle and power-up reset to complete (minimum of 50µs);

Configurethe SPI interface of the stm32 to SPI mode 1 (CPOL = 0, CPHA = 1);

Ifthe CS pin is not tied low permanently, configure the stm32 GPIO connected toCS as an

output;

Configurethe stm32 GPIO connected to the DRDY pin as a falling edge triggered interrupt

input;

SetCS to the device low;

Delayfor a minimum of td(CSSC);

Sendthe RESET command (06h) to make sure the device is properly reset afterpower-up;

Delayfor a minimum of 50 µs + 32 · t(CLK);

Writethe respective register configuration with the WREG command (43h, 08h, 04h,10h, and 00h);

Asan optional sanity check, read back all configuration registers with the RREGcommand (23h);

Sendthe START/SYNC command (08h) to start converting in continuous conversion mode;

Delayfor a minimum of td(SCCS);

ClearCS to high (resets the serial interface);

Loop

{

Waitfor DRDY to transition low;

TakeCS low;

Delayfor a minimum of td(CSSC);

Send24 SCLK rising edges to read out conversion data on DOUT/DRDY;

Delayfor a minimum of td(SCCS);

ClearCS to high;

}

TakeCS low;

Delayfor a minimum of td(CSSC);

Sendthe POWERDOWN command (02h) to stop conversions and put the device in power-downmode;

Delayfor a minimum of td(SCCS);

ClearCS to high;

附錄一個菜鳥初次編程的ADC

1.09 MB, 下載次數: 16, 下載積分: 黑幣 -5

你大可一試的ADC芯片

作者: wyh5360 時間: 2018-1-11 11:50
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作者: wyh5360 時間: 2018-1-11 11:51
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