diff --git a/software/libcariboulite/src/caribou_smi/caribou_smi.c b/software/libcariboulite/src/caribou_smi/caribou_smi.c
index cfb566b..393c89d 100644
--- a/software/libcariboulite/src/caribou_smi/caribou_smi.c
+++ b/software/libcariboulite/src/caribou_smi/caribou_smi.c
@@ -116,7 +116,7 @@ int caribou_smi_init(caribou_smi_st* dev)
     // the allocation is page_size rounded-up
     // The page-size if 0x1000 = (4096) decimal. Thus for a CB sized 32byte => 128 maximal number of CBs
     // Sample size from the modem is 4 bytes and each buffer contains "sample_buf_length" samples.
-    // We allocate unchahced memory for max 128 CBs and "num_sample_bufs" sample buffers
+    // We allocate uncached memory for max 128 CBs and "num_sample_bufs" sample buffers
     uint32_t single_buffer_size_round = PAGE_ROUNDUP(dev->sample_buf_length * SAMPLE_SIZE_BYTES);
     dev->videocore_alloc_size = PAGE_SIZE + dev->num_sample_bufs * single_buffer_size_round;
     dev->actual_sample_buf_length_sec = (float)(single_buffer_size_round) / 16e6;
diff --git a/software/libcariboulite/src/caribou_smi/ref/rpi_dma_test.c b/software/libcariboulite/src/caribou_smi/ref/rpi_dma_test.c
index d626721..3e5ced6 100644
--- a/software/libcariboulite/src/caribou_smi/ref/rpi_dma_test.c
+++ b/software/libcariboulite/src/caribou_smi/ref/rpi_dma_test.c
@@ -94,7 +94,7 @@ typedef enum {
     MEM_FLAG_HINT_PERMALOCK = 1<<6, // Likely to be locked for long periods of time
     MEM_FLAG_L1_NONALLOCATING=(MEM_FLAG_DIRECT | MEM_FLAG_COHERENT) // Allocating in L2
 } VC_ALLOC_FLAGS;
-// VC flags for unchached DMA memory
+// VC flags for uncached DMA memory
 #define DMA_MEM_FLAGS (MEM_FLAG_DIRECT|MEM_FLAG_ZERO)
 
 // Mailbox command/response structure
diff --git a/software/libcariboulite/src/caribou_smi/ref/rpi_dma_utils.h b/software/libcariboulite/src/caribou_smi/ref/rpi_dma_utils.h
index 7470ffb..e39c063 100644
--- a/software/libcariboulite/src/caribou_smi/ref/rpi_dma_utils.h
+++ b/software/libcariboulite/src/caribou_smi/ref/rpi_dma_utils.h
@@ -92,7 +92,7 @@ typedef enum {
     MEM_FLAG_HINT_PERMALOCK = 1<<6, // Likely to be locked for long periods of time
     MEM_FLAG_L1_NONALLOCATING=(MEM_FLAG_DIRECT | MEM_FLAG_COHERENT) // Allocating in L2
 } VC_ALLOC_FLAGS;
-// VC flags for unchached DMA memory
+// VC flags for uncached DMA memory
 #define DMA_MEM_FLAGS (MEM_FLAG_DIRECT|MEM_FLAG_ZERO)
 
 // Mailbox command/response structure
diff --git a/software/libcariboulite/src/caribou_smi/register_utils.h b/software/libcariboulite/src/caribou_smi/register_utils.h
index eabafab..bfd8728 100644
--- a/software/libcariboulite/src/caribou_smi/register_utils.h
+++ b/software/libcariboulite/src/caribou_smi/register_utils.h
@@ -18,7 +18,7 @@
 // Union of 32-bit value with register bitfields
 #define REG_DEF(name, fields) typedef union {struct {volatile uint32_t fields;}; volatile uint32_t value;} name
 
-// VC flags for unchached DMA memory
+// VC flags for uncached DMA memory
 #define DMA_MEM_FLAGS (MEM_FLAG_COHERENT | MEM_FLAG_ZERO)
 
 
diff --git a/software/libcariboulite/src/io_utils/pigpio/command.c b/software/libcariboulite/src/io_utils/pigpio/command.c
index ffc3463..b0d96ab 100644
--- a/software/libcariboulite/src/io_utils/pigpio/command.c
+++ b/software/libcariboulite/src/io_utils/pigpio/command.c
@@ -870,7 +870,7 @@ int cmdParse(
 
       case 128: /* SHELL
 
-                   Two string parameters, the first space teminated.
+                   Two string parameters, the first space terminated.
                    The second arbitrary.
                 */
          f = sscanf(buf+ctl->eaten, " %*s%n %n", &n, &n2);
diff --git a/software/libcariboulite/src/io_utils/pigpio/command.h b/software/libcariboulite/src/io_utils/pigpio/command.h
index 3e5c336..7136209 100644
--- a/software/libcariboulite/src/io_utils/pigpio/command.h
+++ b/software/libcariboulite/src/io_utils/pigpio/command.h
@@ -88,7 +88,7 @@ typedef struct
 
 typedef struct
 {
-   uintptr_t p[5]; //these are sometimes converted to pointers, so presumablly they sometimes have pointers stored in them, I haven't figured out where though. --plugwash
+   uintptr_t p[5]; //these are sometimes converted to pointers, so presumably they sometimes have pointers stored in them, I haven't figured out where though. --plugwash
    int8_t opt[4];
 } cmdInstr_t;
 
diff --git a/software/libcariboulite/src/io_utils/pigpio/pigpio.c b/software/libcariboulite/src/io_utils/pigpio/pigpio.c
index f587a2d..89c82eb 100644
--- a/software/libcariboulite/src/io_utils/pigpio/pigpio.c
+++ b/software/libcariboulite/src/io_utils/pigpio/pigpio.c
@@ -2915,7 +2915,7 @@ static uint32_t waveCbPOadr(int pos)
    page = pos/CBS_PER_OPAGE;
    slot = pos%CBS_PER_OPAGE;
 
-   //cast twice to suppress compiler warning, I belive this cast is ok
+   //cast twice to suppress compiler warning, I believe this cast is ok
    //because dmaOBus contains bus addresses, not virtual addresses.
    return (uint32_t)(uintptr_t) &dmaOBus[page]->cb[slot];
 }
@@ -2948,7 +2948,7 @@ static uint32_t waveOOLPOadr(int pos)
 
    waveOOLPageSlot(pos, &page, &slot);
 
-   //cast twice to suppress compiler warning, I belive this cast is ok
+   //cast twice to suppress compiler warning, I believe this cast is ok
    //because dmaOBus contains bus addresses, not virtual addresses.
    return (uint32_t)(uintptr_t) &dmaOBus[page]->OOL[slot];
 }
@@ -3066,7 +3066,7 @@ static int wave2Cbs(unsigned wave_mode, int *CB, int *BOOL, int *TOOL,
       p->dst  = PWM_TIMER;
    }
 
-   //cast twice to suppress compiler warning, I belive this cast is ok
+   //cast twice to suppress compiler warning, I believe this cast is ok
    //because dmaOBus contains bus addresses, not virtual addresses.
    p->src    = (uint32_t)(uintptr_t) (&dmaOBus[0]->periphData);
    p->length = BPD * 20 / PI_WF_MICROS; /* 20 micros delay */
@@ -3160,7 +3160,7 @@ static int wave2Cbs(unsigned wave_mode, int *CB, int *BOOL, int *TOOL,
                p->dst  = PWM_TIMER;
             }
 
-            //cast twice to suppress compiler warning, I belive this cast is ok
+            //cast twice to suppress compiler warning, I believe this cast is ok
             //because dmaOBus contains bus addresses, not virtual addresses.
             p->src = (uint32_t)(uintptr_t) (&dmaOBus[0]->periphData);
 
@@ -5252,7 +5252,7 @@ static unsigned dmaNowAtICB(void)
 
    while (1)
    {
-      //cast twice to suppress compiler warning, I belive this cast is ok
+      //cast twice to suppress compiler warning, I believe this cast is ok
       //because dmaIbus contains bus addresses, not user addresses. --plugwash
       cb = (cbAddr - ((int)(uintptr_t)dmaIBus[page])) / 32;
 
@@ -5296,7 +5296,7 @@ static int dmaNowAtOCB(void)
 
    while (1)
    {
-      //cast twice to suppress compiler warning, I belive this cast is ok
+      //cast twice to suppress compiler warning, I believe this cast is ok
       //because dmaIbus contains bus addresses, not user addresses. --plugwash
       cb = (cbAddr - ((int)(uintptr_t)dmaOBus[page])) / 32;
 
@@ -5317,7 +5317,7 @@ static int dmaNowAtOCB(void)
 
    while (1)
    {
-      //cast twice to suppress compiler warning, I belive this cast is ok
+      //cast twice to suppress compiler warning, I believe this cast is ok
       //because dmaIbus contains bus addresses, not user addresses. --plugwash
       cb = (cbAddr - ((int)(uintptr_t)dmaOBus[page])) / 32;
 
@@ -5348,7 +5348,7 @@ unsigned rawWaveCB(void)
 
    while (1)
    {
-      //cast twice to suppress compiler warning, I belive this cast is ok
+      //cast twice to suppress compiler warning, I believe this cast is ok
       //because dmaIbus contains bus addresses, not user addresses. --plugwash
       cb = (cbAddr - ((int)(uintptr_t)dmaOBus[page])) / 32;
 
@@ -5385,7 +5385,7 @@ static unsigned dmaCurrentSlot(unsigned pos)
 
 static uint32_t dmaPwmDataAdr(int pos)
 {
-   //cast twice to suppress compiler warning, I belive this cast is ok
+   //cast twice to suppress compiler warning, I believe this cast is ok
    //because dmaIbus contains bus addresses, not user addresses. --plugwash
    return (uint32_t)(uintptr_t) &dmaIBus[pos]->periphData;
 }
@@ -5399,7 +5399,7 @@ static uint32_t dmaGpioOnAdr(int pos)
    page = pos/ON_PER_IPAGE;
    slot = pos%ON_PER_IPAGE;
 
-   //cast twice to suppress compiler warning, I belive this cast is ok
+   //cast twice to suppress compiler warning, I believe this cast is ok
    //because dmaIbus contains bus addresses, not user addresses. --plugwash
    return (uint32_t)(uintptr_t) &dmaIBus[page]->gpioOn[slot];
 }
@@ -5412,7 +5412,7 @@ static uint32_t dmaGpioOffAdr(int pos)
 
    myOffPageSlot(pos, &page, &slot);
 
-   //cast twice to suppress compiler warning, I belive this cast is ok
+   //cast twice to suppress compiler warning, I believe this cast is ok
    //because dmaIbus contains bus addresses, not user addresses. --plugwash
    return (uint32_t)(uintptr_t) &dmaIBus[page]->gpioOff[slot];
 }
@@ -5425,7 +5425,7 @@ static uint32_t dmaTickAdr(int pos)
 
    myTckPageSlot(pos, &page, &slot);
 
-   //cast twice to suppress compiler warning, I belive this cast is ok
+   //cast twice to suppress compiler warning, I believe this cast is ok
    //because dmaIbus contains bus addresses, not user addresses. --plugwash
    return (uint32_t)(uintptr_t) &dmaIBus[page]->tick[slot];
 }
@@ -5438,7 +5438,7 @@ static uint32_t dmaReadLevelsAdr(int pos)
 
    myLvsPageSlot(pos, &page, &slot);
 
-   //cast twice to suppress compiler warning, I belive this cast is ok
+   //cast twice to suppress compiler warning, I believe this cast is ok
    //because dmaIbus contains bus addresses, not user addresses. --plugwash
    return (uint32_t)(uintptr_t) &dmaIBus[page]->level[slot];
 }
@@ -5452,7 +5452,7 @@ static uint32_t dmaCbAdr(int pos)
    page = (pos/CBS_PER_IPAGE);
    slot = (pos%CBS_PER_IPAGE);
 
-   //cast twice to suppress compiler warning, I belive this cast is ok
+   //cast twice to suppress compiler warning, I believe this cast is ok
    //because dmaIbus contains bus addresses, not user addresses. --plugwash
    return (uint32_t)(uintptr_t) &dmaIBus[page]->cb[slot];
 }
@@ -6355,7 +6355,7 @@ static void * pthAlertThread(void *x)
 
             dmaInitCbs();
             flushMemory();
-            //cast twice to suppress compiler warning, I belive this cast is ok
+            //cast twice to suppress compiler warning, I believe this cast is ok
             //because dmaIbus contains bus addresses, not user addresses. --plugwash
             initDMAgo((uint32_t *)dmaIn, (uint32_t)(uintptr_t)dmaIBus[0]);
             myGpioDelay(5000); /* let DMA run for a while */
@@ -7502,7 +7502,7 @@ static int initZaps
 
       if (physical)
       {
-         //cast twice to suppress warning, I belive this is ok as these
+         //cast twice to suppress warning, I believe this is ok as these
          //are bus addresses, not virtual addresses. --plugwash
          dmaBus[basePage+n] = (dmaPage_t *)(uintptr_t) (physical | pi_dram_bus);
 
@@ -8444,7 +8444,7 @@ int initInitialise(void)
 
    flushMemory();
 
-   //cast twice to suppress compiler warning, I belive this cast
+   //cast twice to suppress compiler warning, I believe this cast
    //is ok because dmaIBus contains bus addresses, not virtual
    //addresses.
    initDMAgo((uint32_t *)dmaIn, (uint32_t)(uintptr_t)dmaIBus[0]);
@@ -9982,7 +9982,7 @@ static uint32_t chainGetValPadr(int n)
       block = n / WCB_CHAIN_OOL;
       index = n % WCB_CHAIN_OOL;
       p = (uint32_t *) dmaOBus[block] + (WCB_COUNTER_CBS+WCB_CHAIN_CBS) * 8;
-      //cast twice to suppress warning, I belive this is ok as dmaOBus
+      //cast twice to suppress warning, I believe this is ok as dmaOBus
       //contains bus addresses not virtual addresses.
       return (uint32_t)(uintptr_t) (p + index);
    }
@@ -10016,7 +10016,7 @@ static uint32_t chainGetCntValPadr(int counter, int slot)
    page = counter / 2;
    offset = (counter % 2 ? WCB_COUNTER_OOL : 0);
    p = (uint32_t *) dmaOBus[page] + (WCB_COUNTER_CBS+WCB_CHAIN_CBS) * 8;
-   //cast twice to suppress warning, I belive this is ok as dmaOBus
+   //cast twice to suppress warning, I believe this is ok as dmaOBus
    //contains bus addresses not virtual addresses. --plugwash
    return (uint32_t)(uintptr_t)(p + WCB_CHAIN_OOL + offset + slot);
 }
@@ -10176,7 +10176,7 @@ int gpioWaveChain(char *buf, unsigned bufSize)
       p->dst  = PWM_TIMER;
    }
 
-   //cast twice to suppress warning, I belive this is ok as dmaOBus
+   //cast twice to suppress warning, I believe this is ok as dmaOBus
    //contains bus addresses not virtual addresses. --plugwash
    p->src    = (uint32_t)(uintptr_t) (&dmaOBus[0]->periphData);
    p->length = BPD * 20 / PI_WF_MICROS; /* 20 micros delay */
@@ -10268,7 +10268,7 @@ int gpioWaveChain(char *buf, unsigned bufSize)
 
                /* dummy src and dest */
                p->info = NORMAL_DMA;
-               //cast twice to suppress warning, I belive this is ok as dmaOBus
+               //cast twice to suppress warning, I believe this is ok as dmaOBus
                //contains bus addresses not virtual addresses. --plugwash
                p->src = (uint32_t)(uintptr_t) (&dmaOBus[0]->periphData);
                p->dst = (uint32_t)(uintptr_t) (&dmaOBus[0]->periphData);
@@ -10322,7 +10322,7 @@ int gpioWaveChain(char *buf, unsigned bufSize)
                      p->dst  = PWM_TIMER;
                   }
 
-                  //cast twice to suppress warning, I belive this is ok as dmaOBus
+                  //cast twice to suppress warning, I believe this is ok as dmaOBus
                   //contains bus addresses not virtual addresses. --plugwash
                   p->src = (uint32_t)(uintptr_t) (&dmaOBus[0]->periphData);
 
@@ -10363,7 +10363,7 @@ int gpioWaveChain(char *buf, unsigned bufSize)
 
             /* dummy src and dest */
             p->info = NORMAL_DMA;
-            //cast twice to suppress warning, I belive this is ok as dmaOBus
+            //cast twice to suppress warning, I believe this is ok as dmaOBus
             //contains bus addresses not virtual addresses. --plugwash
             p->src = (uint32_t)(uintptr_t) (&dmaOBus[0]->periphData);
             p->dst = (uint32_t)(uintptr_t) (&dmaOBus[0]->periphData);
@@ -10414,7 +10414,7 @@ int gpioWaveChain(char *buf, unsigned bufSize)
 
    p->info   = NORMAL_DMA;
 
-   //cast twice to suppress warning, I belive this is ok as dmaOBus
+   //cast twice to suppress warning, I believe this is ok as dmaOBus
    //contains bus addresses not virtual addresses. --plugwash
    p->src    = (uint32_t)(uintptr_t) (&dmaOBus[0]->periphData);
    p->dst    = (uint32_t)(uintptr_t) (&dmaOBus[0]->periphData);
diff --git a/software/libcariboulite/src/io_utils/pigpio/pigpio.h b/software/libcariboulite/src/io_utils/pigpio/pigpio.h
index 1b8e51c..838c377 100644
--- a/software/libcariboulite/src/io_utils/pigpio/pigpio.h
+++ b/software/libcariboulite/src/io_utils/pigpio/pigpio.h
@@ -5109,7 +5109,7 @@ D*/
 /*F*/
 rawCbs_t *rawWaveCBAdr(int cbNum);
 /*D
-Return the (Linux) address of contol block cbNum.
+Return the (Linux) address of control block cbNum.
 
 . .
 cbNum: the cb of interest
@@ -5361,7 +5361,7 @@ An 8-bit byte value.
 
 cbNum::
 
-A number identifying a DMA contol block.
+A number identifying a DMA control block.
 
 cfgMicros::