diff --git a/pigpio.c b/pigpio.c
index 2ca1962..4588b38 100644
--- a/pigpio.c
+++ b/pigpio.c
@@ -25,7 +25,7 @@ OTHER DEALINGS IN THE SOFTWARE.
 For more information, please refer to <http://unlicense.org/>
 */
 
-/* pigpio version 53 */
+/* pigpio version 54 */
 
 /* include ------------------------------------------------------- */
 
@@ -4238,27 +4238,27 @@ static void spiInit(uint32_t flags)
 
       if (!(resvd&1))
       {
-         gpioSetMode(PI_ASPI_CE0,  PI_OUTPUT);
+         myGpioSetMode(PI_ASPI_CE0,  PI_OUTPUT);
          myGpioWrite(PI_ASPI_CE0, !(cspols&1));
       }
 
       if (!(resvd&2))
       {
-         gpioSetMode(PI_ASPI_CE1,  PI_OUTPUT);
+         myGpioSetMode(PI_ASPI_CE1,  PI_OUTPUT);
          myGpioWrite(PI_ASPI_CE1, !(cspols&2));
       }
 
       if (!(resvd&4))
       {
-         gpioSetMode(PI_ASPI_CE2,  PI_OUTPUT);
+         myGpioSetMode(PI_ASPI_CE2,  PI_OUTPUT);
          myGpioWrite(PI_ASPI_CE2, !(cspols&4));
       }
 
       /* set gpios to SPI mode */
 
-      gpioSetMode(PI_ASPI_SCLK, PI_ALT4);
-      gpioSetMode(PI_ASPI_MISO, PI_ALT4);
-      gpioSetMode(PI_ASPI_MOSI, PI_ALT4);
+      myGpioSetMode(PI_ASPI_SCLK, PI_ALT4);
+      myGpioSetMode(PI_ASPI_MISO, PI_ALT4);
+      myGpioSetMode(PI_ASPI_MOSI, PI_ALT4);
    }
    else
    {
@@ -4275,12 +4275,12 @@ static void spiInit(uint32_t flags)
 
       /* set gpios to SPI mode */
 
-      if (!(resvd&1)) gpioSetMode(PI_SPI_CE0,  PI_ALT0);
-      if (!(resvd&2)) gpioSetMode(PI_SPI_CE1,  PI_ALT0);
+      if (!(resvd&1)) myGpioSetMode(PI_SPI_CE0,  PI_ALT0);
+      if (!(resvd&2)) myGpioSetMode(PI_SPI_CE1,  PI_ALT0);
 
-      gpioSetMode(PI_SPI_SCLK, PI_ALT0);
-      gpioSetMode(PI_SPI_MISO, PI_ALT0);
-      gpioSetMode(PI_SPI_MOSI, PI_ALT0);
+      myGpioSetMode(PI_SPI_SCLK, PI_ALT0);
+      myGpioSetMode(PI_SPI_MISO, PI_ALT0);
+      myGpioSetMode(PI_SPI_MOSI, PI_ALT0);
    }
 }
 
@@ -4298,13 +4298,13 @@ static void spiTerm(uint32_t flags)
 
       /* restore original state */
 
-      if (!(resvd&1)) gpioSetMode(PI_ASPI_CE0,  old_mode_ace0);
-      if (!(resvd&2)) gpioSetMode(PI_ASPI_CE1,  old_mode_ace1);
-      if (!(resvd&4)) gpioSetMode(PI_ASPI_CE2,  old_mode_ace2);
+      if (!(resvd&1)) myGpioSetMode(PI_ASPI_CE0,  old_mode_ace0);
+      if (!(resvd&2)) myGpioSetMode(PI_ASPI_CE1,  old_mode_ace1);
+      if (!(resvd&4)) myGpioSetMode(PI_ASPI_CE2,  old_mode_ace2);
 
-      gpioSetMode(PI_ASPI_SCLK, old_mode_asclk);
-      gpioSetMode(PI_ASPI_MISO, old_mode_amiso);
-      gpioSetMode(PI_ASPI_MOSI, old_mode_amosi);
+      myGpioSetMode(PI_ASPI_SCLK, old_mode_asclk);
+      myGpioSetMode(PI_ASPI_MISO, old_mode_amiso);
+      myGpioSetMode(PI_ASPI_MOSI, old_mode_amosi);
 
       auxReg[AUX_SPI0_CNTL0_REG] = old_spi_cntl0;
       auxReg[AUX_SPI0_CNTL1_REG] = old_spi_cntl1;
@@ -4313,12 +4313,12 @@ static void spiTerm(uint32_t flags)
    {
       /* restore original state */
 
-      if (!(resvd&1)) gpioSetMode(PI_SPI_CE0,  old_mode_ce0);
-      if (!(resvd&2)) gpioSetMode(PI_SPI_CE1,  old_mode_ce1);
+      if (!(resvd&1)) myGpioSetMode(PI_SPI_CE0,  old_mode_ce0);
+      if (!(resvd&2)) myGpioSetMode(PI_SPI_CE1,  old_mode_ce1);
 
-      gpioSetMode(PI_SPI_SCLK, old_mode_sclk);
-      gpioSetMode(PI_SPI_MISO, old_mode_miso);
-      gpioSetMode(PI_SPI_MOSI, old_mode_mosi);
+      myGpioSetMode(PI_SPI_SCLK, old_mode_sclk);
+      myGpioSetMode(PI_SPI_MISO, old_mode_miso);
+      myGpioSetMode(PI_SPI_MOSI, old_mode_mosi);
 
       spiReg[SPI_CS]  = old_spi_cs;
       spiReg[SPI_CLK] = old_spi_clk;
@@ -8049,10 +8049,10 @@ int gpioSetMode(unsigned gpio, unsigned mode)
       switchFunctionOff(gpio);
 
       gpioInfo[gpio].is = GPIO_UNDEFINED;
-
-      gpioReg[reg] = (gpioReg[reg] & ~(7<<shift)) | (mode<<shift);
    }
 
+   gpioReg[reg] = (gpioReg[reg] & ~(7<<shift)) | (mode<<shift);
+
    return 0;
 }
 
@@ -8147,12 +8147,12 @@ int gpioWrite(unsigned gpio, unsigned level)
 
          switchFunctionOff(gpio);
 
-         gpioSetMode(gpio, PI_OUTPUT);
-
          gpioInfo[gpio].is = GPIO_WRITE;
       }
    }
 
+   myGpioSetMode(gpio, PI_OUTPUT);
+
    if (level == PI_OFF) *(gpioReg + GPCLR0 + BANK) = BIT;
    else                 *(gpioReg + GPSET0 + BANK) = BIT;
 
@@ -8178,11 +8178,11 @@ int gpioPWM(unsigned gpio, unsigned val)
    {
       switchFunctionOff(gpio);
 
-      gpioSetMode(gpio, PI_OUTPUT);
-
       gpioInfo[gpio].is = GPIO_PWM;
    }
 
+   myGpioSetMode(gpio, PI_OUTPUT);
+
    myGpioSetPwm(gpio, gpioInfo[gpio].width, val);
 
    gpioInfo[gpio].width=val;
@@ -8415,11 +8415,11 @@ int gpioServo(unsigned gpio, unsigned val)
    {
       switchFunctionOff(gpio);
 
-      gpioSetMode(gpio, PI_OUTPUT);
-
       gpioInfo[gpio].is = GPIO_SERVO;
    }
 
+   myGpioSetMode(gpio, PI_OUTPUT);
+
    myGpioSetServo(gpio, gpioInfo[gpio].width, val);
 
    gpioInfo[gpio].width=val;
@@ -9795,8 +9795,8 @@ int bbI2CClose(unsigned SDA)
    {
       case PI_WFRX_I2C:
 
-         gpioSetMode(wfRx[SDA].I.SDA, wfRx[SDA].I.SDAMode);
-         gpioSetMode(wfRx[SDA].I.SCL, wfRx[SDA].I.SCLMode);
+         myGpioSetMode(wfRx[SDA].I.SDA, wfRx[SDA].I.SDAMode);
+         myGpioSetMode(wfRx[SDA].I.SCL, wfRx[SDA].I.SCLMode);
 
          wfRx[wfRx[SDA].I.SDA].mode = PI_WFRX_NONE;
          wfRx[wfRx[SDA].I.SCL].mode = PI_WFRX_NONE;
@@ -11324,7 +11324,7 @@ int gpioHardwareClock(unsigned gpio, unsigned frequency)
          initHWClk(cctl[clock], cdiv[clock],
             csrc[clkInf.clock], clkInf.div, clkInf.frac, mash);
 
-         gpioSetMode(gpio, mode);
+         myGpioSetMode(gpio, mode);
 
          gpioInfo[gpio].is = GPIO_HW_CLK;
 
@@ -11448,7 +11448,7 @@ int gpioHardwarePWM(
       {
          switchFunctionOff(gpio);
 
-         gpioSetMode(gpio, mode);
+         myGpioSetMode(gpio, mode);
 
          gpioInfo[gpio].is = GPIO_HW_PWM;
       }
diff --git a/pigpio.h b/pigpio.h
index 9f12087..13210a9 100644
--- a/pigpio.h
+++ b/pigpio.h
@@ -31,7 +31,7 @@ For more information, please refer to <http://unlicense.org/>
 #include <stdint.h>
 #include <pthread.h>
 
-#define PIGPIO_VERSION 53
+#define PIGPIO_VERSION 54
 
 /*TEXT
 
diff --git a/pigs.1 b/pigs.1
index 31aec3c..e55c554 100644
--- a/pigs.1
+++ b/pigs.1
@@ -1808,16 +1808,17 @@ Upon success the new frequency is returned.  On error a negative status code
 will be returned.
 
 .br
-The selectable frequencies depend upon the sample rate with which the
-pigpiod daemon was started.  The sample rate is one of 1, 2, 4, 5, 8,
-or 10 microseconds (default 5).
+If PWM is currently active on the GPIO it will be
+switched off and then back on at the new frequency.
 
 .br
-Each GPIO can be independently set to one of 18 different PWM frequencies.
+Each GPIO can be independently set to one of 18 different PWM
+frequencies.
 
 .br
-If PWM is currently active on the GPIO it will be switched off and then
-back on at the new frequency.
+The selectable frequencies depend upon the sample rate which
+may be 1, 2, 4, 5, 8, or 10 microseconds (default 5).  The
+sample rate is set when the pigpio daemon is started.
 
 .br
 The frequencies for each sample rate are:
@@ -1825,21 +1826,46 @@ The frequencies for each sample rate are:
 .br
 
 .EX
-        #1    #2    #3   #4   #5   #6   #7   #8   #9
- 1us 40000 20000 10000 8000 5000 4000 2500 2000 1600
- 2us 20000 10000  5000 4000 2500 2000 1250 1000  800
- 4us 10000  5000  2500 2000 1250 1000  625  500  400
- 5us  8000  4000  2000 1600 1000  800  500  400  320
- 8us  5000  2500  1250 1000  625  500  313  250  200
-10us  4000  2000  1000  800  500  400  250  200  160
-                                                
-       #10   #11   #12  #13  #14  #15  #16  #17  #18
- 1us  1250  1000   800  500  400  250  200  100   50
- 2us   625   500   400  250  200  125  100   50   25
- 4us   313   250   200  125  100   63   50   25   13
- 5us   250   200   160  100   80   50   40   20   10
- 8us   156   125   100   63   50   31   25   13    6
-10us   125   100    80   50   40   25   20   10    5
+                       Hertz
+.br
+
+.br
+       1: 40000 20000 10000 8000 5000 4000 2500 2000 1600
+.br
+           1250  1000   800  500  400  250  200  100   50
+.br
+
+.br
+       2: 20000 10000  5000 4000 2500 2000 1250 1000  800
+.br
+            625   500   400  250  200  125  100   50   25
+.br
+
+.br
+       4: 10000  5000  2500 2000 1250 1000  625  500  400
+.br
+            313   250   200  125  100   63   50   25   13
+.br
+sample
+.br
+ rate
+.br
+ (us)  5:  8000  4000  2000 1600 1000  800  500  400  320
+.br
+            250   200   160  100   80   50   40   20   10
+.br
+
+.br
+       8:  5000  2500  1250 1000  625  500  313  250  200
+.br
+            156   125   100   63   50   31   25   13    6
+.br
+
+.br
+      10:  4000  2000  1000  800  500  400  250  200  160
+.br
+            125   100    80   50   40   25   20   10    5
+.br
 
 .EE
 
@@ -3393,7 +3419,7 @@ pigs wvcha \
 .br
 
 .br
-while \fB $(pigs wvbsy) -eq 1 \fP; do sleep 0.1; done
+while [[ $(pigs wvbsy) -eq 1 ]]; do sleep 0.1; done
 .br
 
 .br
@@ -4314,7 +4340,7 @@ Again, ignore the details for now.
 .br
 
 .EX
-time (pigs procr 0 10000000; while a=$(pigs procp 0); \fB ${a::1} -eq 2 \fP;\
+time (pigs procr 0 10000000; while a=$(pigs procp 0); [[ ${a::1} -eq 2 ]];\
 .br
  do sleep 0.2; done)
 .br
@@ -4354,7 +4380,7 @@ jp 999 jumps to tag 999 if the result is positive.
 .br
 
 .EX
-time (pigs procr 0 10000000; while a=$(pigs procp 0); \fB ${a::1} -eq 2 \fP;\
+time (pigs procr 0 10000000; while a=$(pigs procp 0); [[ ${a::1} -eq 2 ]];\
 .br
  do sleep 0.2; done)
 .br