Hi, I am trying to interface TLV2548 ADC(12 bit 200KSPS, 8 channel) with C5402 DSK. After some trouble in finding the documents for adapter card and pin mapping, I completed the hardware integration. ------- For the SW integration,I started with a working example of blink_bios project in C:\ti\examples\dsk5402\dsp\. The program works and it toggles the three LEDS on the board. Now I used the data converter plugin to add the files "automatically" (t254x_ob.c and tidc_api.c and assciated header files )for TLV2548. I defined in blink_b.c TTIDC pDC; TTIDCSTATUS tlv2548_status; long adc_data; I am using these API functions to configure and read from ADC tlv2548_status= dc_configure(&pDC); //dc_configure maps to tlv254x_configure function adc_data=tlv254x_read(&pDC); I used a CDB file from C:\ti\examples\dsk5402\dsp\blink_bios. I placed _tlv254x_isr in the function field of HWI_SINT6. ------- However I am not able to read any thing correctly. When the ADC is not connected, tlv2548_status should be -1 indicating that there is no device connected.The fuction is checking the data convertor object for the null pointer and since I am passing a pointer ,it is assuming that the device is connected and tlv2548 is set to 0 even when TLV2544 ADC is not connected. I am thinking that I am not using the correct defintions for the void pointer passed to be for dc_configure function. Could you please let me know how to call these API functions properly? Thank you for your time. Regards, Choudhary Some relevant parts of TIDC_API.h /****************************************************************/ /* common DC structure */ /****************************************************************/ typedef struct { TTIDCSTATUS (*configure) (void *pDc); void (*power) (void *pDc, int bDown); long (*read) (void *pDc); void (*write) (void *pDc, long lData); void (*rblock) (void *pDC, void *pData, unsigned long ulCount, void (*callback) (void *)); void (*wblock) (void *pDC, void *pData, unsigned long ulCount, void (*callback) (void *)); void* reserved[4]; } TTIDC; DCPAPI TTIDCSTATUS dc_configure(void *pDC); |
configuring tlv2548 with C5402 DSK, Data converter plugin
Started by ●November 30, 2003