T32CM11_pwm.h

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#ifndef T32CM11_PWM_H_
#define T32CM11_PWM_H_
 
#include "tr_hal_platform.h"

 
#define TR_HAL_NUM_PWM 5
 
// PWM IDs
typedef enum
{
    PWM_0_ID = 0,
    PWM_1_ID = 1,
    PWM_2_ID = 2,
    PWM_3_ID = 3,
    PWM_4_ID = 4,
 
} tr_hal_pwm_id_t;

#define PWM_DEFAULT_PIN 20

#define CHIP_MEMORY_MAP_PWM0_BASE     (0xA0C00000UL)
#define CHIP_MEMORY_MAP_PWM1_BASE     (0xA0C00100UL)
#define CHIP_MEMORY_MAP_PWM2_BASE     (0xA0C00200UL)
#define CHIP_MEMORY_MAP_PWM3_BASE     (0xA0C00300UL)
#define CHIP_MEMORY_MAP_PWM4_BASE     (0xA0C00400UL)
 

typedef struct
{
    // enable PWM and enable CLK
    __IO  uint32_t   enable;             // 0x00
 
    // reset PWM
    __IO  uint32_t   reset;              // 0x04
 
    // PWM setup
    __IO  uint32_t   settings;           // 0x08
 
    // PWM counter end value
    __IO  uint32_t   counter_end;        // 0x0C
 
    // number of times to play the sequence
    // amount of playback
    __IO  uint32_t   sequence_repeat;    // 0x10
 
    // RSEQ
    __IO  uint32_t   rseq_num_elements;  // 0x14
    __IO  uint32_t   rseq_num_repeats;   // 0x18
    __IO  uint32_t   rseq_delay;         // 0x1C
 
    // TSEQ
    __IO  uint32_t   tseq_num_elements;  // 0x20
    __IO  uint32_t   tseq_num_repeats;   // 0x24
    __IO  uint32_t   tseq_delay;         // 0x28
 
    __IO  uint32_t   reserved1[5];       // 0x2C,
                                         // 0x30, 0x34, 0x38, 0x3C
 
    // RDMA 0 - RSEQ
    __IO  uint32_t   dma0_enable;        // 0x40
    __IO  uint32_t   dma0_reset;         // 0x44
    __IO  uint32_t   dma0_segment_size;  // 0x48
    __IO  uint32_t   dma0_start_addr;    // 0x4C
    __IO  uint32_t   reserved2[2];       // 0x50, 0x54
    __IO  uint32_t   dma0_next_ptr_addr; // 0x58
    __IO  uint32_t   dma0_debug;         // 0x5C
 
    // RDMA 1 - TSEQ
    __IO  uint32_t   dma1_enable;        // 0x60
    __IO  uint32_t   dma1_reset;         // 0x64
    __IO  uint32_t   dma1_segment_size;  // 0x68
    __IO  uint32_t   dma1_start_addr;    // 0x6C
    __IO  uint32_t   reserved3[2];       // 0x70, 0x74
    __IO  uint32_t   dma1_next_ptr_addr; // 0x78
    __IO  uint32_t   dma1_debug;         // 0x7C
 
    __IO  uint32_t   reserved4[8];       // 0x80, 0x84, 0x88, 0x8C
                                         // 0x90, 0x94, 0x98, 0x9C
    // interrupts
    __IO  uint32_t   interrupt_clear;    // 0xA0
    __IO  uint32_t   interrupt_mask;     // 0xA4
    __IO  uint32_t   interrupt_status;   // 0xA8
 
} PWM_REGISTERS_T;
 
// *****************************************************************
// this orients the PWMx_REGISTERS struct with the correct addresses
// so referencing a field will now read/write the correct PWM
// register chip address
#define PWM0_REGISTERS  ((PWM_REGISTERS_T *) CHIP_MEMORY_MAP_PWM0_BASE)
#define PWM1_REGISTERS  ((PWM_REGISTERS_T *) CHIP_MEMORY_MAP_PWM1_BASE)
#define PWM2_REGISTERS  ((PWM_REGISTERS_T *) CHIP_MEMORY_MAP_PWM2_BASE)
#define PWM3_REGISTERS  ((PWM_REGISTERS_T *) CHIP_MEMORY_MAP_PWM3_BASE)
#define PWM4_REGISTERS  ((PWM_REGISTERS_T *) CHIP_MEMORY_MAP_PWM4_BASE)
 
 
// *****************************************************************
// helper defines for ENABLE REGISTER (0x00)
#define PWM_CTRL_REG_ENABLE_PWM  0x01
#define PWM_CTRL_REG_DISABLE_PWM 0x00
#define PWM_CTRL_REG_ENABLE_CLK  0x02
#define PWM_CTRL_REG_DISABLE_CLK 0x00
 
// *****************************************************************
// helper defines for RESET REGISTER (0x04)
#define PWM_CTRL_REG_RESET 0x01
 
 
// *****************************************************************
// helper defines for SETTINGS REGISTER (0x08)
 
// bit 0 = sequence order
#define PWM_CTRL_REG_RSEQ_FIRST 0x00
#define PWM_CTRL_REG_TSEQ_FIRST 0x01
 
// bit 1 = sequence selection
#define PWM_CTRL_REG_ONE_SEQUENCE 0x00
#define PWM_CTRL_REG_TWO_SEQUENCE 0x02
 
// bit 2 = play mode
#define PWM_CTRL_REG_NON_CONTINUOUS 0x00
#define PWM_CTRL_REG_CONTINUOUS     0x04
 
// bit 3 = DMA format
#define PWM_CTRL_REG_DMA_FORMAT_0 0x00
#define PWM_CTRL_REG_DMA_FORMAT_1 0x08
 
// bit 4 = counter mode
#define PWM_CTRL_REG_UP_COUNTER          0x00
#define PWM_CTRL_REG_DOWN_AND_UP_COUNTER 0x10
 
// bit 5 = counter trigger
#define PWM_CTRL_REG_TRIGGER_ON_ENABLE 0x00
#define PWM_CTRL_REG_TRIGGER_ON_FIFO   0x20
 
// bit 6 = auto trigger
#define PWM_CTRL_REG_NO_AUTO_TRIGGER 0x00
#define PWM_CTRL_REG_AUTO_TRIGGER    0x40
 
// bits 8 to 11 = clock dividier
#define PWM_CLK_DIV_1   0x0000
#define PWM_CLK_DIV_2   0x0100
#define PWM_CLK_DIV_4   0x0200
#define PWM_CLK_DIV_8   0x0300
#define PWM_CLK_DIV_16  0x0400
#define PWM_CLK_DIV_32  0x0500
#define PWM_CLK_DIV_64  0x0600
#define PWM_CLK_DIV_128 0x0700
#define PWM_CLK_DIV_256 0x0800
 
#define PWM_CLK_DIV_MASK 0x0F00
 
// bits 12-14: enable PWM to trigger on other PWM
#define PWM_CTRL_REG_TRIGGER_ON_PWM0 0x0000
#define PWM_CTRL_REG_TRIGGER_ON_PWM1 0x1000
#define PWM_CTRL_REG_TRIGGER_ON_PWM2 0x2000
#define PWM_CTRL_REG_TRIGGER_ON_PWM3 0x3000
#define PWM_CTRL_REG_TRIGGER_ON_PWM4 0x4000
#define PWM_CTRL_REG_SELF_TRIGGER    0x7000
 
// bits 15-31 reserved
 
// *****************************************************************
// helper defines for DMAx ENABLE REGISTER (0x40, 0x60)
#define PWM_DMA_ENABLE  0x00000001
#define PWM_DMA_DISABLE 0x00000000
 
// *****************************************************************
// helper defines for DMAx RESET REGISTER (0x44, 0x64)
#define PWM_DMA_RESET 0x00000001
 

typedef enum
{
    TR_HAL_PWM_CLOCK_DIVIDER_1 = 1,
    TR_HAL_PWM_CLOCK_DIVIDER_2 = 2,
    TR_HAL_PWM_CLOCK_DIVIDER_4 = 3,
    TR_HAL_PWM_CLOCK_DIVIDER_8 = 4,
    TR_HAL_PWM_CLOCK_DIVIDER_16 = 5,
    TR_HAL_PWM_CLOCK_DIVIDER_32 = 6,
    TR_HAL_PWM_CLOCK_DIVIDER_64 = 7,
    TR_HAL_PWM_CLOCK_DIVIDER_128 = 8,
    TR_HAL_PWM_CLOCK_DIVIDER_256 = 9,
 
} tr_hal_pwm_clk_div_t;
 

typedef enum
{
    TR_HAL_PWM_CLK_SELECT_PER_CLK = 0,
    TR_HAL_PWM_CLK_SELECT_DEFAULT = 0,
 
} tr_hal_pwm_clk_select_t;
 


// end_count = 0x001F + 1 = 0x0020 = 32 --> 32Mhz/32 = 1 MHz
#define PWM_END_COUNT_CLKDIV_1_1MHZ                  0x0020
// threshhold = 0x0018 = 24 --> 24/32 = 75%
#define PWM_THRESHHOLD_CLKDIV_1_1MHZ_DUTY_CYCLE_75   0x0018
// threshhold = 0x0010 = 16 --> 16/32 = 50%
#define PWM_THRESHHOLD_CLKDIV_1_1MHZ_DUTY_CYCLE_50   0x0010
// threshhold = 0x0008 =  8 -->  8/32 = 25%
#define PWM_THRESHHOLD_CLKDIV_1_1MHZ_DUTY_CYCLE_25   0x0008

// end_count = 0x003F + 1 = 0x0040 = 64 --> 32Mhz/64 = 500 KHz
#define PWM_END_COUNT_CLKDIV_1_500KHZ                0x0040
// threshhold = 0x0030 = 48 --> 48/64 = 75%
#define PWM_THRESHHOLD_CLKDIV_1_500KHZ_DUTY_CYCLE_75 0x0030
// threshhold = 0x0020 = 32 --> 32/64 = 50%
#define PWM_THRESHHOLD_CLKDIV_1_500KHZ_DUTY_CYCLE_50 0x0020
// threshhold = 0x0010 = 16 --> 16/64 = 25%
#define PWM_THRESHHOLD_CLKDIV_1_500KHZ_DUTY_CYCLE_25 0x0010

// end_count = 0x007F + 1 = 0x0080 = 128 --> 32Mhz/128 = 250 KHz
#define PWM_END_COUNT_CLKDIV_1_250KHZ                0x0080
// threshhold = 0x0060 = 96 --> 96/128 = 75%
#define PWM_THRESHHOLD_CLKDIV_1_250KHZ_DUTY_CYCLE_75 0x0060
// threshhold = 0x0040 = 64 --> 64/128 = 50%
#define PWM_THRESHHOLD_CLKDIV_1_250KHZ_DUTY_CYCLE_50 0x0040
// threshhold = 0x0020 = 32 --> 32/128 = 25%
#define PWM_THRESHHOLD_CLKDIV_1_250KHZ_DUTY_CYCLE_25 0x0020
 
// limits for end count
#define MINIMUM_END_COUNT_VALUE 4
#define MAXIMUM_END_COUNT_VALUE 0x7FFF
 
// limits for threshhold
#define MINIMUM_THRESHHOLD_VALUE 4
#define MAXIMUM_THRESHHOLD_VALUE 0x7FFF
 

typedef struct
{
    // which pin to use for PWM
    tr_hal_gpio_pin_t pin_to_use;
 
    // which clock to use
    tr_hal_pwm_clk_select_t clock_to_use;
 
    // clock divider
    tr_hal_pwm_clk_div_t clock_divider;
 
    // this along with the clock creates the frequency
    // freq = clock / (clk_div * end_count)
    uint16_t end_count;
 
    // this creates the duty cycle
    // duty cycle = threshhold / end_count
    uint16_t threshhold;
 
} tr_hal_pwm_settings_t;

 

#define DEFAULT_PWM_CONFIG                                            \
    {                                                                 \
        .pin_to_use = (tr_hal_gpio_pin_t) { PWM_DEFAULT_PIN },        \
        .clock_to_use  = TR_HAL_PWM_CLK_SELECT_DEFAULT,               \
        .clock_divider = TR_HAL_PWM_CLOCK_DIVIDER_1,                  \
        .end_count     = PWM_END_COUNT_CLKDIV_1_500KHZ,               \
        .threshhold    = PWM_THRESHHOLD_CLKDIV_1_500KHZ_DUTY_CYCLE_75,\
    }
 

PWM_REGISTERS_T* tr_hal_pwm_get_register_address(tr_hal_pwm_id_t pwm_id);
 

 
 
#endif //T32CM11_PWM_H_