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