| STR7XX ADC Driver | ||
|---|---|---|
 | Chapter 79. STR7XX ADC Driver |  |
Name
STR7XX — ADC Driver
Description
This driver supports the ADC devices available in some variants of the ST STR7XX family of microprocessors.
Sample Size
The STR7XX ADC produces 12 bit samples. Therefore this driver sets
CYGNUM_IO_ADC_SAMPLE_SIZE to 12. This will cause
the generic layer to define cyg_adc_sample_t as a 16 bit
value.
Sample Rates
The ADC hardware is limited to a maximum of 1K samples per channel. Since channels are sampled on a round-robin basis at 4 times this rate, this means that the total sample rate is 4K samples per second.
The option CYGNUM_DEVS_ADC_ARM_STR7XX_DEFAULT_RATE
defines a default sample rate and is initially set to 500.
Configuration
For each channel X supported the CDL script provides the following configuration options:
- cdl_component CYGPKG_DEVS_ADC_ARM_STR7XX_CHANNELX
- This defines whether the channel is included.
- cdl_option CYGDAT_DEVS_ADC_ARM_STR7XX_CHANNELN_NAME
- This defines the name of the channel.
- cdl_option CYGNUM_DEVS_ADC_ARM_STR7XX_CHANNELX_BUFSIZE
- This defines the size of the channel's sample buffer, in samples.
| |  | |
| Chapter 79. STR7XX ADC Driver |  | Chapter 80. TSC ADC Driver |
| 2024-12-10 | eCosPro Non-Commercial Public License |