Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK 데이터 시트
제품 코드
AT91SAM9N12-EK
878
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
42.7.10.2 Touchscreen Channels Only
When only touchscreen conversions are required (i.e. TSMODE differs from 0 in ADC_TSMR register and ADC_CHSR
equals 0), the structure of data within the buffer is defined by the ADC_TSMR register.
equals 0), the structure of data within the buffer is defined by the ADC_TSMR register.
When TSMODE = 1 or 3, each trigger event adds 2 half-words in the buffer (assuming TSAV = 0), first half-word being
XPOS of ADC_XPOSR register then YPOS of ADC_YPOSR register. If TSAV/TSFREQ differs from 0, the data structure
remains unchanged. Not all trigger events add data to the buffer.
XPOS of ADC_XPOSR register then YPOS of ADC_YPOSR register. If TSAV/TSFREQ differs from 0, the data structure
remains unchanged. Not all trigger events add data to the buffer.
When TSMODE = 2, each trigger event adds 4 half-words to the buffer (assuming TSAV=0), first half-word being XPOS
of ADC_XPOSR register followed by YPOS of ADC_YPOSR register and finally Z1 followed by Z2, both located in
ADC_PRESSR register.
of ADC_XPOSR register followed by YPOS of ADC_YPOSR register and finally Z1 followed by Z2, both located in
ADC_PRESSR register.
When TAG is set (ADC_EMR), the CHNB field (4 most significant bit of the ADC_LCDR) register is set to 0 when XPOS
is transmitted and set to 1 when YPOS is transmitted, allowing an easier post-processing of the buffer or better checking
buffer integrity. In case 4-wire with pressure mode is selected, Z1 value is transmitted to the buffer along with tag set to 2
and Z2 is tagged with value 3.
is transmitted and set to 1 when YPOS is transmitted, allowing an easier post-processing of the buffer or better checking
buffer integrity. In case 4-wire with pressure mode is selected, Z1 value is transmitted to the buffer along with tag set to 2
and Z2 is tagged with value 3.
XSCALE and YSCALE (calibration values) are not transmitted to the buffer because they are supposed to be constant
and moreover only measured at the very first start up of the controller or upon user request.
and moreover only measured at the very first start up of the controller or upon user request.
There is no change in buffer structure whatever the value of PENDET bit configuration in ADC_TSMR register but it is
recommended to use the pen detection function for buffer post-processing (refer to
recommended to use the pen detection function for buffer post-processing (refer to