65 lines
2.4 KiB
C
65 lines
2.4 KiB
C
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//
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// Gertboard test suite
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//
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// pwm header file
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//
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// Copyright (C) Gert Jan van Loo & Myra VanInwegen 2012
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// No rights reserved
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// You may treat this program as if it was in the public domain
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Try to strike a balance between keep code simple for
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// novice programmers but still have reasonable quality code
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// (e.g. do not use #ifndef big_demo_h....)
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//
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#define PWMCLK_CNTL *(clk+40)
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#define PWMCLK_DIV *(clk+41)
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#define PWM_CONTROL *pwm
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#define PWM_STATUS *(pwm+1)
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#define PWM0_RANGE *(pwm+4)
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#define PWM1_RANGE *(pwm+8)
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#define PWM0_DATA *(pwm+5)
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#define PWM1_DATA *(pwm+9)
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// PWM Control register bits
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#define PWM1_MS_MODE 0x8000 // Run in MS mode
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#define PWM1_USEFIFO 0x2000 // Data from FIFO
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#define PWM1_REVPOLAR 0x1000 // Reverse polarity
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#define PWM1_OFFSTATE 0x0800 // Ouput Off state
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#define PWM1_REPEATFF 0x0400 // Repeat last value if FIFO empty
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#define PWM1_SERIAL 0x0200 // Run in serial mode
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#define PWM1_ENABLE 0x0100 // Channel Enable
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#define PWM0_MS_MODE 0x0080 // Run in MS mode
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#define PWM0_USEFIFO 0x0020 // Data from FIFO
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#define PWM0_REVPOLAR 0x0010 // Reverse polarity
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#define PWM0_OFFSTATE 0x0008 // Ouput Off state
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#define PWM0_REPEATFF 0x0004 // Repeat last value if FIFO empty
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#define PWM0_SERIAL 0x0002 // Run in serial mode
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#define PWM0_ENABLE 0x0001 // Channel Enable
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#define PWM_CLRFIFO 0x0040 // Clear FIFO (Self clearing bit)
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// PWM status bits I need
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#define PWMS_BUSERR 0x0100 // Register access was too fast
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// (Write to clear it)
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// declarations for routines
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void setup_pwm();
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void force_pwm0(int, int);
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void pwm_off();
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