Other Parts Discussed in Thread: OMAP-L138
Hi,
Processor: OMAP-L138
In our custom hardware we have connected CPLD via EMIFA bus. CPLD team has implemented some registers inside it.
I have to setup an EDMA transfer to read 125KB data from one of the register in CPLD.
The register addresses that ate mapped inside CPLD is given below table
| Register Description | Width in Bits | Physical Address |
| Character LCD Register Addr Space | 8 | 0x6001 0100 |
| 8 | 0x6001 0200 | |
| 8 | 0x6001 0300 | |
| 8 | 0x6001 0400 | |
| A/D Data 0 | 16 | 0x6001 0000 |
| A/D Data 1 | 16 | 0x6001 0002 |
| Video DAC Data | 16 | 0x6001 0500 |
| Video DAC Command | 16 | 0x6001 0600 |
| Analog DAC Data | 16 | 0x6001 0700 |
| Analog DAC Command | 16 | 0x6001 0800 |
| Digitizer Control | 14 | 0x6001 0900 |
| Montage Switch 0 | 1 | 0x6001 0A00 |
| Montage Switch 1 | 1 | 0x6001 0B00 |
| Video Control | 3 | 0x6001 0C00 |
| Video RTC BCD Update | 8 | 0x6001 0D00 |
| Impedance Switch Data | 16 | 0x6001 0E00 |
| Analog Board Control | 1 | 0x6001 0F00 |
I am trying to read from A/D Data:0 register which is addressed at 0x600010000.
Just before the EDMA transfer starts some of the EDMA parameter values are
Opt=0x8011c800 SrcAddr=0x60010000 ACnt=0x4 BCNT=0x7d00 DestAddr=0xc181a000 SrcBidx=0x0 DstBIdx=0x4 LinkAddr=0xffff BCntReload=0x0 SrcCIdx=0x0 DestCIdx=0x0 CCnt=0x1 We are calling EDMA3_DRV_enableTransfer API (WinCE Specific) to start EDMA transfer. Also the GPIO Bank-4 Interrupt being used as External Trigger event to transfer data from CPLD to Processor. What I had observed is initially EDMA starts and it is able to transfer 125KB of data. I had verified for data integrity and it is observed that the data is correct. Once the first transfer completes I am calling EDMA3_DRV_setPaRAM API again to start the next EDMA transfer. But after this I don't see any data being transferred to processor. (EMA_OE doesn't toggles after first 125KB of data transfers successfully). Please let me know if I am missing, configuring anything in EDMA registers. Thank You & Regards, GSR
