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mbed library sources. Supersedes mbed-src.

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targets/TARGET_NUVOTON/TARGET_NUC472/pwmout_api.c@161:2cc1468da177, 2017-03-30 (annotated)

Committer:
<>
Date:
Thu Mar 30 13:45:57 2017 +0100
Revision:
161:2cc1468da177
Parent:
149:156823d33999
Child:
165:e614a9f1c9e2
This updates the lib to the mbed lib v139

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2015-2016 Nuvoton
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16
<> 144:ef7eb2e8f9f7 17 #include "pwmout_api.h"
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 #if DEVICE_PWMOUT
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 #include "cmsis.h"
<> 144:ef7eb2e8f9f7 22 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 23 #include "PeripheralPins.h"
<> 144:ef7eb2e8f9f7 24 #include "nu_modutil.h"
<> 144:ef7eb2e8f9f7 25 #include "nu_miscutil.h"
<> 144:ef7eb2e8f9f7 26 #include "nu_bitutil.h"
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 struct nu_pwm_var {
<> 144:ef7eb2e8f9f7 29 uint32_t en_msk;
<> 144:ef7eb2e8f9f7 30 };
<> 144:ef7eb2e8f9f7 31
<> 144:ef7eb2e8f9f7 32 static struct nu_pwm_var pwm0_var = {
<> 144:ef7eb2e8f9f7 33 .en_msk = 0
<> 144:ef7eb2e8f9f7 34 };
<> 144:ef7eb2e8f9f7 35
<> 144:ef7eb2e8f9f7 36 static struct nu_pwm_var pwm1_var = {
<> 144:ef7eb2e8f9f7 37 .en_msk = 0
<> 144:ef7eb2e8f9f7 38 };
<> 144:ef7eb2e8f9f7 39
<> 144:ef7eb2e8f9f7 40 static uint32_t pwm_modinit_mask = 0;
<> 144:ef7eb2e8f9f7 41
<> 144:ef7eb2e8f9f7 42 // FIXME: PWM1 2/3 channels fail. PWM registers cannot write after their respective clocks are enabled.
<> 144:ef7eb2e8f9f7 43 static const struct nu_modinit_s pwm_modinit_tab[] = {
<> 144:ef7eb2e8f9f7 44 {PWM_0_0, PWM0CH01_MODULE, CLK_CLKSEL2_PWM0CH01SEL_HIRC, 0, PWM0_RST, PWM0CH0_IRQn, &pwm0_var},
<> 144:ef7eb2e8f9f7 45 {PWM_0_1, PWM0CH01_MODULE, CLK_CLKSEL2_PWM0CH01SEL_HIRC, 0, PWM0_RST, PWM0CH1_IRQn, &pwm0_var},
<> 144:ef7eb2e8f9f7 46 {PWM_0_2, PWM0CH23_MODULE, CLK_CLKSEL2_PWM0CH23SEL_HIRC, 0, PWM0_RST, PWM0CH2_IRQn, &pwm0_var},
<> 144:ef7eb2e8f9f7 47 {PWM_0_3, PWM0CH23_MODULE, CLK_CLKSEL2_PWM0CH23SEL_HIRC, 0, PWM0_RST, PWM0CH3_IRQn, &pwm0_var},
<> 144:ef7eb2e8f9f7 48 {PWM_0_4, PWM0CH45_MODULE, CLK_CLKSEL2_PWM0CH45SEL_HIRC, 0, PWM0_RST, PWM0CH4_IRQn, &pwm0_var},
<> 144:ef7eb2e8f9f7 49 {PWM_0_5, PWM0CH45_MODULE, CLK_CLKSEL2_PWM0CH45SEL_HIRC, 0, PWM0_RST, PWM0CH5_IRQn, &pwm0_var},
<> 144:ef7eb2e8f9f7 50
<> 144:ef7eb2e8f9f7 51 {PWM_1_0, PWM1CH01_MODULE, CLK_CLKSEL2_PWM1CH01SEL_HIRC, 0, PWM1_RST, PWM1CH0_IRQn, &pwm1_var},
<> 144:ef7eb2e8f9f7 52 {PWM_1_1, PWM1CH01_MODULE, CLK_CLKSEL2_PWM1CH01SEL_HIRC, 0, PWM1_RST, PWM1CH1_IRQn, &pwm1_var},
<> 144:ef7eb2e8f9f7 53 {PWM_1_2, PWM1CH23_MODULE, CLK_CLKSEL2_PWM1CH23SEL_HIRC, 0, PWM1_RST, PWM1CH2_IRQn, &pwm1_var},
<> 144:ef7eb2e8f9f7 54 {PWM_1_3, PWM1CH23_MODULE, CLK_CLKSEL2_PWM1CH23SEL_HIRC, 0, PWM1_RST, PWM1CH3_IRQn, &pwm1_var},
<> 144:ef7eb2e8f9f7 55 {PWM_1_4, PWM1CH45_MODULE, CLK_CLKSEL2_PWM1CH45SEL_HIRC, 0, PWM1_RST, PWM1CH4_IRQn, &pwm1_var},
<> 144:ef7eb2e8f9f7 56 {PWM_1_5, PWM1CH45_MODULE, CLK_CLKSEL2_PWM1CH45SEL_HIRC, 0, PWM1_RST, PWM1CH5_IRQn, &pwm1_var},
<> 144:ef7eb2e8f9f7 57
<> 144:ef7eb2e8f9f7 58 {NC, 0, 0, 0, 0, (IRQn_Type) 0, NULL}
<> 144:ef7eb2e8f9f7 59 };
<> 144:ef7eb2e8f9f7 60
<> 144:ef7eb2e8f9f7 61 static void pwmout_config(pwmout_t* obj);
<> 144:ef7eb2e8f9f7 62
<> 144:ef7eb2e8f9f7 63 void pwmout_init(pwmout_t* obj, PinName pin)
<> 144:ef7eb2e8f9f7 64 {
<> 144:ef7eb2e8f9f7 65 obj->pwm = (PWMName) pinmap_peripheral(pin, PinMap_PWM);
<> 144:ef7eb2e8f9f7 66 MBED_ASSERT((int) obj->pwm != NC);
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68 const struct nu_modinit_s *modinit = get_modinit(obj->pwm, pwm_modinit_tab);
<> 144:ef7eb2e8f9f7 69 MBED_ASSERT(modinit != NULL);
<> 144:ef7eb2e8f9f7 70 MBED_ASSERT(modinit->modname == obj->pwm);
<> 144:ef7eb2e8f9f7 71
<> 144:ef7eb2e8f9f7 72 // NOTE: All channels (identified by PWMName) share a PWM module. This reset will also affect other channels of the same PWM module.
<> 144:ef7eb2e8f9f7 73 if (! ((struct nu_pwm_var *) modinit->var)->en_msk) {
<> 144:ef7eb2e8f9f7 74 // Reset this module if no channel enabled
<> 144:ef7eb2e8f9f7 75 SYS_ResetModule(modinit->rsetidx);
<> 144:ef7eb2e8f9f7 76 }
<> 144:ef7eb2e8f9f7 77
<> 144:ef7eb2e8f9f7 78 PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm);
<> 144:ef7eb2e8f9f7 79 uint32_t chn = NU_MODSUBINDEX(obj->pwm);
<> 144:ef7eb2e8f9f7 80
<> 144:ef7eb2e8f9f7 81 // NOTE: Channels 0/1, 2/3, and 4/5 share a clock source.
<> 144:ef7eb2e8f9f7 82 if ((((struct nu_pwm_var *) modinit->var)->en_msk & (0x3 << (chn / 2 * 2))) == 0) {
<> 144:ef7eb2e8f9f7 83 // Select clock source of paired channels
<> 144:ef7eb2e8f9f7 84 CLK_SetModuleClock(modinit->clkidx, modinit->clksrc, modinit->clkdiv);
<> 144:ef7eb2e8f9f7 85 // Enable clock of paired channels
<> 144:ef7eb2e8f9f7 86 CLK_EnableModuleClock(modinit->clkidx);
<> 144:ef7eb2e8f9f7 87
<> 144:ef7eb2e8f9f7 88 // FIXME: PWM_1_2/3 design bug. PWM_1_2/3 also require PWM_1_0/1 clock enabled.
<> 144:ef7eb2e8f9f7 89 if (obj->pwm == PWM_1_2 || obj->pwm == PWM_1_3) {
<> 144:ef7eb2e8f9f7 90 CLK_EnableModuleClock(PWM1CH01_MODULE);
<> 144:ef7eb2e8f9f7 91 }
<> 144:ef7eb2e8f9f7 92 }
<> 144:ef7eb2e8f9f7 93
<> 144:ef7eb2e8f9f7 94 // Wire pinout
<> 144:ef7eb2e8f9f7 95 pinmap_pinout(pin, PinMap_PWM);
<> 144:ef7eb2e8f9f7 96
<> 144:ef7eb2e8f9f7 97 // Default: period = 10 ms, pulse width = 0 ms
<> 144:ef7eb2e8f9f7 98 obj->period_us = 1000 * 10;
<> 144:ef7eb2e8f9f7 99 obj->pulsewidth_us = 0;
<> 144:ef7eb2e8f9f7 100 pwmout_config(obj);
<> 144:ef7eb2e8f9f7 101
<> 144:ef7eb2e8f9f7 102 // Enable output of the specified PWM channel
<> 144:ef7eb2e8f9f7 103 PWM_EnableOutput(pwm_base, 1 << chn);
<> 144:ef7eb2e8f9f7 104 PWM_Start(pwm_base, 1 << chn);
<> 144:ef7eb2e8f9f7 105
<> 144:ef7eb2e8f9f7 106 ((struct nu_pwm_var *) modinit->var)->en_msk |= 1 << chn;
<> 144:ef7eb2e8f9f7 107
<> 161:2cc1468da177 108 if (((struct nu_pwm_var *) modinit->var)->en_msk) {
<> 161:2cc1468da177 109 // Mark this module to be inited.
<> 161:2cc1468da177 110 int i = modinit - pwm_modinit_tab;
<> 161:2cc1468da177 111 pwm_modinit_mask |= 1 << i;
<> 161:2cc1468da177 112 }
<> 144:ef7eb2e8f9f7 113 }
<> 144:ef7eb2e8f9f7 114
<> 144:ef7eb2e8f9f7 115 void pwmout_free(pwmout_t* obj)
<> 144:ef7eb2e8f9f7 116 {
<> 144:ef7eb2e8f9f7 117 PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm);
<> 144:ef7eb2e8f9f7 118 uint32_t chn = NU_MODSUBINDEX(obj->pwm);
<> 144:ef7eb2e8f9f7 119 PWM_ForceStop(pwm_base, 1 << chn);
<> 144:ef7eb2e8f9f7 120
<> 144:ef7eb2e8f9f7 121 const struct nu_modinit_s *modinit = get_modinit(obj->pwm, pwm_modinit_tab);
<> 144:ef7eb2e8f9f7 122 MBED_ASSERT(modinit != NULL);
<> 144:ef7eb2e8f9f7 123 MBED_ASSERT(modinit->modname == obj->pwm);
<> 144:ef7eb2e8f9f7 124 ((struct nu_pwm_var *) modinit->var)->en_msk &= ~(1 << chn);
<> 144:ef7eb2e8f9f7 125
<> 144:ef7eb2e8f9f7 126
<> 144:ef7eb2e8f9f7 127 if ((((struct nu_pwm_var *) modinit->var)->en_msk & (0x3 << (chn / 2 * 2))) == 0) {
<> 144:ef7eb2e8f9f7 128 // FIXME: PWM_1_2/3 design bug. PWM_1_2/3 also require PWM_1_0/1 clock enabled.
<> 144:ef7eb2e8f9f7 129 switch (obj->pwm) {
<> 144:ef7eb2e8f9f7 130 case PWM_1_0:
<> 144:ef7eb2e8f9f7 131 case PWM_1_1:
<> 144:ef7eb2e8f9f7 132 if (pwm1_var.en_msk & 0xC) {
<> 144:ef7eb2e8f9f7 133 break;
<> 144:ef7eb2e8f9f7 134 }
<> 144:ef7eb2e8f9f7 135
<> 144:ef7eb2e8f9f7 136 case PWM_1_2:
<> 144:ef7eb2e8f9f7 137 case PWM_1_3:
<> 144:ef7eb2e8f9f7 138 if (! (pwm1_var.en_msk & 0x3)) {
<> 144:ef7eb2e8f9f7 139 CLK_DisableModuleClock(PWM1CH01_MODULE);
<> 144:ef7eb2e8f9f7 140 }
<> 144:ef7eb2e8f9f7 141
<> 144:ef7eb2e8f9f7 142 default:
<> 144:ef7eb2e8f9f7 143 // Disable clock of paired channels
<> 144:ef7eb2e8f9f7 144 CLK_DisableModuleClock(modinit->clkidx);
<> 144:ef7eb2e8f9f7 145 }
<> 144:ef7eb2e8f9f7 146 }
<> 144:ef7eb2e8f9f7 147
<> 161:2cc1468da177 148 if (((struct nu_pwm_var *) modinit->var)->en_msk == 0) {
<> 161:2cc1468da177 149 // Mark this module to be deinited.
<> 161:2cc1468da177 150 int i = modinit - pwm_modinit_tab;
<> 161:2cc1468da177 151 pwm_modinit_mask &= ~(1 << i);
<> 161:2cc1468da177 152 }
<> 144:ef7eb2e8f9f7 153 }
<> 144:ef7eb2e8f9f7 154
<> 144:ef7eb2e8f9f7 155 void pwmout_write(pwmout_t* obj, float value)
<> 144:ef7eb2e8f9f7 156 {
<> 144:ef7eb2e8f9f7 157 obj->pulsewidth_us = NU_CLAMP((uint32_t) (value * obj->period_us), 0, obj->period_us);
<> 144:ef7eb2e8f9f7 158 pwmout_config(obj);
<> 144:ef7eb2e8f9f7 159 }
<> 144:ef7eb2e8f9f7 160
<> 144:ef7eb2e8f9f7 161 float pwmout_read(pwmout_t* obj)
<> 144:ef7eb2e8f9f7 162 {
<> 144:ef7eb2e8f9f7 163 return NU_CLAMP((((float) obj->pulsewidth_us) / obj->period_us), 0.0f, 1.0f);
<> 144:ef7eb2e8f9f7 164 }
<> 144:ef7eb2e8f9f7 165
<> 144:ef7eb2e8f9f7 166 void pwmout_period(pwmout_t* obj, float seconds)
<> 144:ef7eb2e8f9f7 167 {
<> 144:ef7eb2e8f9f7 168 pwmout_period_us(obj, seconds * 1000000.0f);
<> 144:ef7eb2e8f9f7 169 }
<> 144:ef7eb2e8f9f7 170
<> 144:ef7eb2e8f9f7 171 void pwmout_period_ms(pwmout_t* obj, int ms)
<> 144:ef7eb2e8f9f7 172 {
<> 144:ef7eb2e8f9f7 173 pwmout_period_us(obj, ms * 1000);
<> 144:ef7eb2e8f9f7 174 }
<> 144:ef7eb2e8f9f7 175
<> 144:ef7eb2e8f9f7 176 // Set the PWM period, keeping the duty cycle the same.
<> 144:ef7eb2e8f9f7 177 void pwmout_period_us(pwmout_t* obj, int us)
<> 144:ef7eb2e8f9f7 178 {
<> 144:ef7eb2e8f9f7 179 uint32_t period_us_old = obj->period_us;
<> 144:ef7eb2e8f9f7 180 uint32_t pulsewidth_us_old = obj->pulsewidth_us;
<> 144:ef7eb2e8f9f7 181 obj->period_us = us;
<> 144:ef7eb2e8f9f7 182 obj->pulsewidth_us = NU_CLAMP(obj->period_us * pulsewidth_us_old / period_us_old, 0, obj->period_us);
<> 144:ef7eb2e8f9f7 183 pwmout_config(obj);
<> 144:ef7eb2e8f9f7 184 }
<> 144:ef7eb2e8f9f7 185
<> 144:ef7eb2e8f9f7 186 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
<> 144:ef7eb2e8f9f7 187 {
<> 144:ef7eb2e8f9f7 188 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
<> 144:ef7eb2e8f9f7 189 }
<> 144:ef7eb2e8f9f7 190
<> 144:ef7eb2e8f9f7 191 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
<> 144:ef7eb2e8f9f7 192 {
<> 144:ef7eb2e8f9f7 193 pwmout_pulsewidth_us(obj, ms * 1000);
<> 144:ef7eb2e8f9f7 194 }
<> 144:ef7eb2e8f9f7 195
<> 144:ef7eb2e8f9f7 196 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
<> 144:ef7eb2e8f9f7 197 {
<> 144:ef7eb2e8f9f7 198 obj->pulsewidth_us = NU_CLAMP(us, 0, obj->period_us);
<> 144:ef7eb2e8f9f7 199 pwmout_config(obj);
<> 144:ef7eb2e8f9f7 200 }
<> 144:ef7eb2e8f9f7 201
<> 144:ef7eb2e8f9f7 202 int pwmout_allow_powerdown(void)
<> 144:ef7eb2e8f9f7 203 {
<> 144:ef7eb2e8f9f7 204 uint32_t modinit_mask = pwm_modinit_mask;
<> 144:ef7eb2e8f9f7 205 while (modinit_mask) {
<> 144:ef7eb2e8f9f7 206 int pwm_idx = nu_ctz(modinit_mask);
<> 144:ef7eb2e8f9f7 207 const struct nu_modinit_s *modinit = pwm_modinit_tab + pwm_idx;
<> 144:ef7eb2e8f9f7 208 if (modinit->modname != NC) {
<> 144:ef7eb2e8f9f7 209 PWM_T *pwm_base = (PWM_T *) NU_MODBASE(modinit->modname);
<> 144:ef7eb2e8f9f7 210 uint32_t chn = NU_MODSUBINDEX(modinit->modname);
<> 144:ef7eb2e8f9f7 211 // Disallow entering power-down mode if PWM counter is enabled.
<> 144:ef7eb2e8f9f7 212 if ((pwm_base->CNTEN & (1 << chn)) && pwm_base->CMPDAT[chn]) {
<> 144:ef7eb2e8f9f7 213 return 0;
<> 144:ef7eb2e8f9f7 214 }
<> 144:ef7eb2e8f9f7 215 }
<> 144:ef7eb2e8f9f7 216 modinit_mask &= ~(1 << pwm_idx);
<> 144:ef7eb2e8f9f7 217 }
<> 144:ef7eb2e8f9f7 218
<> 144:ef7eb2e8f9f7 219 return 1;
<> 144:ef7eb2e8f9f7 220 }
<> 144:ef7eb2e8f9f7 221
<> 144:ef7eb2e8f9f7 222 static void pwmout_config(pwmout_t* obj)
<> 144:ef7eb2e8f9f7 223 {
<> 144:ef7eb2e8f9f7 224 PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm);
<> 144:ef7eb2e8f9f7 225 uint32_t chn = NU_MODSUBINDEX(obj->pwm);
<> 144:ef7eb2e8f9f7 226 // NOTE: Support period < 1s
<> 144:ef7eb2e8f9f7 227 //PWM_ConfigOutputChannel(pwm_base, chn, 1000 * 1000 / obj->period_us, obj->pulsewidth_us * 100 / obj->period_us);
<> 144:ef7eb2e8f9f7 228 PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
<> 144:ef7eb2e8f9f7 229 }
<> 144:ef7eb2e8f9f7 230
<> 144:ef7eb2e8f9f7 231 #endif