diff options
| author | henryk <henryk@6dc7ffe9-61d6-0310-9af1-9938baff3ed1> | 2007-12-09 06:10:56 +0000 |
|---|---|---|
| committer | henryk <henryk@6dc7ffe9-61d6-0310-9af1-9938baff3ed1> | 2007-12-09 06:10:56 +0000 |
| commit | ceb643380b02d0d8289e3ad75a495123414ace8c (patch) | |
| tree | cf37628d2b07d7cebc2a4f04d5f8ea2488eb9d57 /openpicc/os/boot | |
| parent | bdc39aadd1a26d7709ff15722be90c016be2057a (diff) | |
Prevent late frames by spinning in SSC CP0 IRQ till end of short frame reception
Fix tc_cdiv_set_divider. again.
Reverse the polarity! (of the ssc transmit clock)
git-svn-id: https://svn.openpcd.org:2342/trunk@381 6dc7ffe9-61d6-0310-9af1-9938baff3ed1
Diffstat (limited to 'openpicc/os/boot')
| -rw-r--r-- | openpicc/os/boot/boot.s | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/openpicc/os/boot/boot.s b/openpicc/os/boot/boot.s index e709b94..95bc130 100644 --- a/openpicc/os/boot/boot.s +++ b/openpicc/os/boot/boot.s @@ -52,6 +52,7 @@ .equ AT91C_TC_SWTRG, (1 << 2) .equ AT91C_TC_CLKEN, (1 << 0) .equ PIO_DATA, (1 << 27) +.equ PIO_FRAME, (1 << 20) .equ PIO_SSC_TF, (1 << 15) .equ PIOA_SODR, 0x30 .equ PIOA_CODR, 0x34 @@ -222,7 +223,14 @@ my_fiq_handler: movne r11, #PIO_DATA strne r11, [r10, #PIOA_IDR] /* disable further PIO_DATA FIQ */ - + beq .no_pio_data +/* .loop_high: + ldr r11, [r10, #PIOA_PDSR] + tst r11, #PIO_DATA + bne .loop_high + str r9, [r12, #TC_CCR] /* software trigger */ + +.no_pio_data: tst r8, #PIO_SSC_TF /* check for SSC Transmit Frame signal */ ldrne r11, [r10, #PIOA_PDSR] tstne r11, #PIO_SSC_TF /* check for SSC_TF == 1 */ |