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added comment about GPT0 usage

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This commit is contained in:
Markus Fröschle
2013-10-30 14:18:38 +00:00
parent 919e221b4a
commit 2cab96be63
1 changed files with 4 additions and 0 deletions
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4
BaS_gcc/sources/BaS.c
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@@ -191,6 +191,10 @@ void enable_coldfire_interrupts()
*FPGA_INTR_CONTRL = 0L; /* disable all interrupts */ *FPGA_INTR_CONTRL = 0L; /* disable all interrupts */
MCF_EPORT_EPPAR = 0xaaa8; /* all interrupts on falling edge */ MCF_EPORT_EPPAR = 0xaaa8; /* all interrupts on falling edge */
/*
* TIN0 on the Coldfire is connected to the FPGA. TIN0 triggers every write
* access to 0xff8201 (vbasehi), i.e. everytime the video base address is written
*/
MCF_GPT0_GMS = MCF_GPT_GMS_ICT(1) | /* timer 0 on, video change capture on rising edge */ MCF_GPT0_GMS = MCF_GPT_GMS_ICT(1) | /* timer 0 on, video change capture on rising edge */
MCF_GPT_GMS_IEN | MCF_GPT_GMS_IEN |
MCF_GPT_GMS_TMS(1); MCF_GPT_GMS_TMS(1);