1 /*
2 * Copyright 2018 NXP
3 * All rights reserved.
4 *
5 *
6 * SPDX-License-Identifier: BSD-3-Clause
7 */
8
9 #include "fsl_common.h"
10 #include "fsl_adapter_pwm.h"
11 #include "fsl_ftm.h"
12
13 /************************************************************************************
14 *************************************************************************************
15 * Private prototypes
16 *************************************************************************************
17 ************************************************************************************/
18 typedef struct _hal_pwm_handle_struct_t
19 {
20 uint32_t pwmClock_Hz;
21 uint8_t instance;
22 } hal_pwm_handle_struct_t;
23 /************************************************************************************
24 *************************************************************************************
25 * Private memory declarations
26 *************************************************************************************
27 ************************************************************************************/
28
29 static FTM_Type *const s_ftmBase[] = FTM_BASE_PTRS;
30 static uint8_t s_pwmUsedChannel[sizeof(s_ftmBase) / sizeof(s_ftmBase[0])] = {0};
31
32 /************************************************************************************
33 *************************************************************************************
34 * Public functions
35 *************************************************************************************
36 ************************************************************************************/
HAL_PwmInit(hal_pwm_handle_t halPwmHandle,uint8_t instance,uint32_t srcClock_Hz)37 hal_pwm_status_t HAL_PwmInit(hal_pwm_handle_t halPwmHandle, uint8_t instance, uint32_t srcClock_Hz)
38 {
39 ftm_config_t ftmInfo;
40 hal_pwm_handle_struct_t *halPwmState = halPwmHandle;
41
42 assert(instance < (uint8_t)FSL_FEATURE_SOC_FTM_COUNT);
43 assert(NULL != halPwmHandle);
44 assert(sizeof(hal_pwm_handle_struct_t) == HAL_PWM_HANDLE_SIZE);
45 halPwmState->pwmClock_Hz = srcClock_Hz;
46 halPwmState->instance = instance;
47
48 /* Initialize ftm module */
49 if (0U == s_pwmUsedChannel[instance])
50 {
51 FTM_GetDefaultConfig(&ftmInfo);
52 if (kStatus_Fail == FTM_Init(s_ftmBase[instance], &ftmInfo))
53 {
54 return kStatus_HAL_PwmFail;
55 }
56 }
57
58 return kStatus_HAL_PwmSuccess;
59 }
60
HAL_PwmDeinit(hal_pwm_handle_t halPwmHandle)61 void HAL_PwmDeinit(hal_pwm_handle_t halPwmHandle)
62 {
63 hal_pwm_handle_struct_t *halPwmState = halPwmHandle;
64
65 assert(halPwmHandle);
66 assert(halPwmState->instance < (uint8_t)FSL_FEATURE_SOC_FTM_COUNT);
67
68 /* Decrease the channel counter for the instance */
69 if (s_pwmUsedChannel[halPwmState->instance] > 0U)
70 {
71 s_pwmUsedChannel[halPwmState->instance] -= 1U;
72 }
73
74 /* DeInitialize tpm module */
75 if (0U == s_pwmUsedChannel[halPwmState->instance])
76 {
77 FTM_Deinit(s_ftmBase[halPwmState->instance]);
78 }
79 }
80 /*! -------------------------------------------------------------------------
81 * \brief Returns the absolute time at the moment of the call.
82 * \return Absolute time at the moment of the call in microseconds.
83 *---------------------------------------------------------------------------*/
HAL_PwmSetupPwm(hal_pwm_handle_t halPwmHandle,uint8_t channel,hal_pwm_setup_config_t * setupConfig)84 hal_pwm_status_t HAL_PwmSetupPwm(hal_pwm_handle_t halPwmHandle, uint8_t channel, hal_pwm_setup_config_t *setupConfig)
85 {
86 hal_pwm_handle_struct_t *halPwmState = halPwmHandle;
87
88 assert(halPwmHandle);
89 assert(channel <= (uint8_t)kFTM_Chnl_7);
90 assert(halPwmState->instance < (uint8_t)FSL_FEATURE_SOC_FTM_COUNT);
91 assert(setupConfig);
92 ftm_chnl_pwm_signal_param_t pwmChannelConfig = {
93 .chnlNumber = (ftm_chnl_t)channel,
94 .level = (ftm_pwm_level_select_t)setupConfig->level,
95 .dutyCyclePercent = setupConfig->dutyCyclePercent,
96 #if defined(FSL_FEATURE_FTM_HAS_COMBINE) && FSL_FEATURE_FTM_HAS_COMBINE
97 .firstEdgeDelayPercent = 0
98 #endif
99 };
100
101 if (kStatus_Success != FTM_SetupPwm(s_ftmBase[halPwmState->instance], &pwmChannelConfig, 1,
102 (ftm_pwm_mode_t)setupConfig->mode, setupConfig->pwmFreq_Hz,
103 halPwmState->pwmClock_Hz))
104 {
105 return kStatus_HAL_PwmFail;
106 }
107 FTM_StartTimer(s_ftmBase[halPwmState->instance], kFTM_SystemClock);
108
109 /* Increase the channel counter for the instance */
110 s_pwmUsedChannel[halPwmState->instance] += 1U;
111
112 return kStatus_HAL_PwmSuccess;
113 }
114
115 /*! -------------------------------------------------------------------------
116 * \brief update the Duty cycle
117 *---------------------------------------------------------------------------*/
HAL_PwmUpdateDutycycle(hal_pwm_handle_t halPwmHandle,uint8_t channel,hal_pwm_mode_t mode,uint8_t dutyCyclePercent)118 hal_pwm_status_t HAL_PwmUpdateDutycycle(hal_pwm_handle_t halPwmHandle,
119 uint8_t channel,
120 hal_pwm_mode_t mode,
121 uint8_t dutyCyclePercent)
122 {
123 hal_pwm_handle_struct_t *halPwmState = halPwmHandle;
124
125 assert(halPwmHandle);
126 assert(channel <= (uint8_t)kFTM_Chnl_7);
127 assert(halPwmState->instance < (uint8_t)FSL_FEATURE_SOC_FTM_COUNT);
128
129 FTM_UpdatePwmDutycycle(s_ftmBase[halPwmState->instance], (ftm_chnl_t)channel, (ftm_pwm_mode_t)mode,
130 dutyCyclePercent);
131 /* Software trigger to update registers */
132 FTM_SetSoftwareTrigger(s_ftmBase[halPwmState->instance], true);
133
134 return kStatus_HAL_PwmSuccess;
135 }
136
