On 05/29/2017 10:58 PM, Gene Heskett wrote:
>> I'll build a clean SD card with all on it once I get it all debugged,
>> and hopefully fixed.
>
> One comment, this one is failing with the newest kernel, 4.9.30-rt20-v7+.
I think it is because lcnc was compiled with another kernel in mind. I
compiled mine with (in src dir):
$ ./configure --with-realtime=uspace
--with-kernel-headers=/home/bertho/marvin/kernel-rt-preempt/linux-rpi-4.9.y/include
--enable-non-distributable
And above was with the 4.9.30-rt20-v7+ kernel source-tree.
Your system may have a problem with the API of the newer kernel version.
[snip]
I may have a fix to the SPI problem. There seems to be a problem in
clock-setting, which me apparently have been seeing. The attached patch
is very simple and works correct and so all the time.
The second change in that patch is a temporary stack-buffer allocation
that the compiler is complaining about (too large). This should be fixed
more permanently. However, the current change is sufficient for now and
works with some headroom left:
$ cat /proc/cpuinfo |wc -c
1136
--
Greetings Bertho
(disclaimers are disclaimed)
diff --git a/src/hal/drivers/mesa-hostmot2/hm2_rpspi.c b/src/hal/drivers/mesa-hostmot2/hm2_rpspi.c
index a6a8b5c..72b14f2 100644
--- a/src/hal/drivers/mesa-hostmot2/hm2_rpspi.c
+++ b/src/hal/drivers/mesa-hostmot2/hm2_rpspi.c
@@ -473,6 +473,7 @@ static void setup_gpio(uint16_t spiclkdiv) {
BCM2835_GPFSEL1 = x;
/* set up SPI */
+ BCM2835_SPICLK = 0; // Do it twice with different values, otherwise it will not be set properly
BCM2835_SPICLK = (1 << spiclkdiv);
BCM2835_SPICS = 0;
@@ -505,7 +506,7 @@ static void restore_gpio() {
static platform_t check_platform(void)
{
FILE *fp;
- char buf[8192];
+ char buf[2048]; // FIXME: This is bad, large buffer on the stack and may never be enough
size_t fsize;
fp = fopen("/proc/cpuinfo", "r");
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