Re: [Gumstix-users] Newbie Problems: Cross Compilation and McBSP with Overo Waterstorm and Alcatraz Board

[Scott E. <sc...@ju...>]

The clocks for McBSP (and SPI) need to be inputs.

Here's a working system with an McBSP3 driver (I just happened to be working
on one)

=== MCBSP3_CLKX mux

root@overo:~# devmem2 0x48002178 h
/dev/mem opened.
Memory mapped at address 0x4015c000.
Read at address  0x48002178 (0x4015c178): 0x0101

=== MCBSP3_FSX mux

root@overo:~# devmem2 0x4800217a h
/dev/mem opened.
Memory mapped at address 0x40157000.
Read at address  0x4800217A (0x4015717a): 0x0101

=== The driver

root@overo:~# lsmod
Module                  Size  Used by
ads1278                 8677  0 

=== A userland test program

root@overo:~# ./adswatch 

===== Driver config =====
  block_size:       8192
  state:            MCBSP_REQUESTED | MCBSP_CONFIG_SET
  mode:             HIGH SPEED
  mcbsp_clkdiv      16
  trigger_duration: 10 us
  flash_delay:      1000 us
  flash_duration:   5000 us
  cycle_duration:   100 ms
=========================


(use ctrl-c to stop)

Total: 157   Blocks: 9  Elapsed: 101  Samples/sec: 22811       ^C

(GETTING DATA)

=== Remux MCBSP3_CLKX as an output

root@overo:~# devmem2 0x48002178 h 0x0001
/dev/mem opened.
Memory mapped at address 0x400b9000.
Read at address  0x48002178 (0x400b9178): 0x0101
Write at address 0x48002178 (0x400b9178): 0x0001, readback 0x0001

=== Test the driver

root@overo:~# ./adswatch 

===== Driver config =====
  block_size:       8192
  state:            MCBSP_REQUESTED
  mode:             HIGH SPEED
  mcbsp_clkdiv      16
  trigger_duration: 10 us
  flash_delay:      1000 us
  flash_duration:   5000 us
  cycle_duration:   100 ms
=========================


(use ctrl-c to stop)

(NO DATA)

=== Put the mux for CLKX back to input

root@overo:~# devmem2 0x48002178 h 0x0101
/dev/mem opened.
Memory mapped at address 0x40162000.
Read at address  0x48002178 (0x40162178): 0x0001
Write at address 0x48002178 (0x40162178): 0x0101, readback 0x0101

=== Test the driver

root@overo:~# ./adswatch 

===== Driver config =====
  block_size:       8192
  state:            MCBSP_REQUESTED | MCBSP_CONFIG_SET
  mode:             HIGH SPEED
  mcbsp_clkdiv      16
  trigger_duration: 10 us
  flash_delay:      1000 us
  flash_duration:   5000 us
  cycle_duration:   100 ms
=========================


(use ctrl-c to stop)

Total: 111   Blocks: 10  Elapsed: 101  Samples/sec: 25346       ^C

(GETTING DATA)

=== Remux MCBSP3_FSX as an output

root@overo:~# devmem2 0x4800217a h 0x0001
/dev/mem opened.
Memory mapped at address 0x400a4000.
Read at address  0x4800217A (0x400a417a): 0x0101
Write at address 0x4800217A (0x400a417a): 0x0001, readback 0x0001

=== Test the driver

root@overo:~# ./adswatch 

===== Driver config =====
  block_size:       8192
  state:            MCBSP_REQUESTED | MCBSP_CONFIG_SET
  mode:             HIGH SPEED
  mcbsp_clkdiv      16
  trigger_duration: 10 us
  flash_delay:      1000 us
  flash_duration:   5000 us
  cycle_duration:   100 ms
=========================


(use ctrl-c to stop)

(NO DATA)


=== Put the FSX mux back to inpu

root@overo:~# devmem2 0x4800217a h 0x0101
/dev/mem opened.
Memory mapped at address 0x4005e000.
Read at address  0x4800217A (0x4005e17a): 0x0001
Write at address 0x4800217A (0x4005e17a): 0x0101, readback 0x0101

=== Test the driver

root@overo:~# ./adswatch 

===== Driver config =====
  block_size:       8192
  state:            MCBSP_REQUESTED | MCBSP_CONFIG_SET
  mode:             HIGH SPEED
  mcbsp_clkdiv      16
  trigger_duration: 10 us
  flash_delay:      1000 us
  flash_duration:   5000 us
  cycle_duration:   100 ms
=========================


(use ctrl-c to stop)

Total: 407   Blocks: 10  Elapsed: 101  Samples/sec: 25346       ^C

(GETTING DATA)




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