Fixing MCC 118 comms issue.

lib/mcc118.c

@@ -204,7 +204,7 @@ static const char* const spi_device = SPI_DEVICE_0; // the spidev device
 static const uint8_t spi_mode = SPI_MODE_1;         // use mode 1 (CPOL=0, 
                                                     // CPHA=1)
 static const uint8_t spi_bits = 8;                  // 8 bits per transfer
-static const uint32_t spi_speed = 10000000;         // maximum SPI clock 
+static const uint32_t spi_speed = 9600000;          // maximum SPI clock 
                                                     // frequency
 static const uint16_t spi_delay = 0;                // delay in us before 
                                                     // removing CS
@@ -929,6 +929,7 @@ static void* _scan_thread(void* arg)
     }
 
 #define MIN_SLEEP_US	200
+#define TRIG_SLEEP_US	1000
 
     done = false;
     sleep_us = MIN_SLEEP_US;
@@ -957,7 +958,7 @@ static void* _scan_thread(void* arg)
             else if (info->triggered == 0)
             {
                 // waiting for trigger, use a longer sleep time
-                sleep_us = 5000;
+                sleep_us = TRIG_SLEEP_US;
             }
             else
             {

version_history.txt

@@ -1,5 +1,8 @@
-1.1.0.2: Fixed an issue with high CPU usage when waiting for a trigger on the
+1.1.0.2:
+    - Fixed an issue with high CPU usage when waiting for a trigger on the
     MCC 118 - updated both library and trigger examples.
+    - Lowered the max SPI clock rate for the MCC 118 to fix communications 
+    issues on some systems.
 
 1.1.0.1: Fixed an issue with resource conflicts when using multiple threads in
     the same process (such as using multiple MCC 118s.)