posted on 15 Feb 2010 3:41 PM PST
3 Forum Posts
I use PSOC3 to do ADC->DMA ->Memory to sample my analog input data then post- processing my ADC data.
ADC( 300K sps, 10 bits) Memory (xdata, ADC_data).
I try to modify some c codes from DMA example projects, but I did not get right sample data from ADC.
Here is my c code:
CyDmaTdSetAddress(td,ADC_DelSig_1_OUTSAMP, (uint16)&ADC_data );
Anyone knows how to do it?
posted on 04 Mar 2010 03:35 AM PST
15 Forum Posts
Here are some modifications that should be done to make this work .
1) TD_SWAP_EN : Since the buffer - ADC_data(Big Endian) and ADC registers(Little Endian) have different endian-ess , you need to enable swap to store data in the proper format
2)ADC Coherency : By default the ADC coherency key is set to low. But in this case(When you read multi bytes from ADC register using single Td) , the last byte read will be mid byte. Hence you need to set the ADC coherency to mid byte .
3)"ADC_DelSig_1_OUTSAMP" is not an address but it is the value of ADC_DelSig_1_DEC__OUTSAMP register.
There are many such typos in the function used above - the compiler will give you error for other typos and you can correct it yourself.
ALL CONTENT AND MATERIALS ON THIS SITE ARE PROVIDED "AS IS". CYPRESS SEMICONDUCTOR AND ITS RESPECTIVE SUPPLIERS MAKE NO REPRESENTATIONS ABOUT THE SUITABILITY OF THESE MATERIALS FOR ANY PURPOSE AND DISCLAIM ALL WARRANTIES AND CONDITIONS WITH REGARD TO THESE MATERIALS, INCLUDING BUT NOT LIMITED TO, ALL IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUAL PROPERTY RIGHT. NO LICENSE, EITHER EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, IS GRANTED BY CYPRESS SEMICONDUCTOR. USE OF THE INFORMATION ON THIS SITE MAY REQUIRE A LICENSE FROM A THIRD PARTY, OR A LICENSE FROM CYPRESS SEMICONDUCTOR.
Content on this site may contain or be subject to specific guidelines or limitations on use. All postings and use of the content on this site are subject to the Terms and Conditions of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Terms and Conditions of this site. Cypress Semiconductor and its suppliers reserve the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.