ON Semiconductor / mbed-os

5.2.1 - Updated I2C files

Dependents:   mbed-TFT-example-NCS36510 mbed-Accelerometer-example-NCS36510 mbed-Accelerometer-example-NCS36510

targets/TARGET_NUVOTON/TARGET_M451/pwmout_api.c@1:f30bdcd2b33b, 2017-02-27 (annotated)

Committer:
jacobjohnson
Date:
Mon Feb 27 17:45:05 2017 +0000
Revision:
1:f30bdcd2b33b
Parent:
0:098463de4c5d 
changed the inputscale from 1 to 7 in analogin_api.c.  This will need to be changed later, and accessed from the main level, but for now this allows the  adc to read a value from 0 to 3.7V, instead of just up to 1V.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
group-onsemi 0:098463de4c5d 1 /* mbed Microcontroller Library
group-onsemi 0:098463de4c5d 2 * Copyright (c) 2015-2016 Nuvoton
group-onsemi 0:098463de4c5d 3 *
group-onsemi 0:098463de4c5d 4 * Licensed under the Apache License, Version 2.0 (the "License");
group-onsemi 0:098463de4c5d 5 * you may not use this file except in compliance with the License.
group-onsemi 0:098463de4c5d 6 * You may obtain a copy of the License at
group-onsemi 0:098463de4c5d 7 *
group-onsemi 0:098463de4c5d 8 * http://www.apache.org/licenses/LICENSE-2.0
group-onsemi 0:098463de4c5d 9 *
group-onsemi 0:098463de4c5d 10 * Unless required by applicable law or agreed to in writing, software
group-onsemi 0:098463de4c5d 11 * distributed under the License is distributed on an "AS IS" BASIS,
group-onsemi 0:098463de4c5d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
group-onsemi 0:098463de4c5d 13 * See the License for the specific language governing permissions and
group-onsemi 0:098463de4c5d 14 * limitations under the License.
group-onsemi 0:098463de4c5d 15 */
group-onsemi 0:098463de4c5d 16
group-onsemi 0:098463de4c5d 17 #include "pwmout_api.h"
group-onsemi 0:098463de4c5d 18
group-onsemi 0:098463de4c5d 19 #if DEVICE_PWMOUT
group-onsemi 0:098463de4c5d 20
group-onsemi 0:098463de4c5d 21 #include "cmsis.h"
group-onsemi 0:098463de4c5d 22 #include "pinmap.h"
group-onsemi 0:098463de4c5d 23 #include "PeripheralPins.h"
group-onsemi 0:098463de4c5d 24 #include "nu_modutil.h"
group-onsemi 0:098463de4c5d 25 #include "nu_miscutil.h"
group-onsemi 0:098463de4c5d 26 #include "nu_bitutil.h"
group-onsemi 0:098463de4c5d 27
group-onsemi 0:098463de4c5d 28 struct nu_pwm_var {
group-onsemi 0:098463de4c5d 29 uint32_t en_msk;
group-onsemi 0:098463de4c5d 30 };
group-onsemi 0:098463de4c5d 31
group-onsemi 0:098463de4c5d 32 static struct nu_pwm_var pwm0_var = {
group-onsemi 0:098463de4c5d 33 .en_msk = 0
group-onsemi 0:098463de4c5d 34 };
group-onsemi 0:098463de4c5d 35
group-onsemi 0:098463de4c5d 36 static struct nu_pwm_var pwm1_var = {
group-onsemi 0:098463de4c5d 37 .en_msk = 0
group-onsemi 0:098463de4c5d 38 };
group-onsemi 0:098463de4c5d 39
group-onsemi 0:098463de4c5d 40 static uint32_t pwm_modinit_mask = 0;
group-onsemi 0:098463de4c5d 41
group-onsemi 0:098463de4c5d 42 static const struct nu_modinit_s pwm_modinit_tab[] = {
group-onsemi 0:098463de4c5d 43 {PWM_0_0, PWM0_MODULE, CLK_CLKSEL2_PWM0SEL_PCLK0, 0, PWM0_RST, PWM0P0_IRQn, &pwm0_var},
group-onsemi 0:098463de4c5d 44 {PWM_0_1, PWM0_MODULE, CLK_CLKSEL2_PWM0SEL_PCLK0, 0, PWM0_RST, PWM0P0_IRQn, &pwm0_var},
group-onsemi 0:098463de4c5d 45 {PWM_0_2, PWM0_MODULE, CLK_CLKSEL2_PWM0SEL_PCLK0, 0, PWM0_RST, PWM0P1_IRQn, &pwm0_var},
group-onsemi 0:098463de4c5d 46 {PWM_0_3, PWM0_MODULE, CLK_CLKSEL2_PWM0SEL_PCLK0, 0, PWM0_RST, PWM0P1_IRQn, &pwm0_var},
group-onsemi 0:098463de4c5d 47 {PWM_0_4, PWM0_MODULE, CLK_CLKSEL2_PWM0SEL_PCLK0, 0, PWM0_RST, PWM0P2_IRQn, &pwm0_var},
group-onsemi 0:098463de4c5d 48 {PWM_0_5, PWM0_MODULE, CLK_CLKSEL2_PWM0SEL_PCLK0, 0, PWM0_RST, PWM0P2_IRQn, &pwm0_var},
group-onsemi 0:098463de4c5d 49
group-onsemi 0:098463de4c5d 50 {PWM_1_0, PWM1_MODULE, CLK_CLKSEL2_PWM1SEL_PCLK1, 0, PWM1_RST, PWM1P0_IRQn, &pwm1_var},
group-onsemi 0:098463de4c5d 51 {PWM_1_1, PWM1_MODULE, CLK_CLKSEL2_PWM1SEL_PCLK1, 0, PWM1_RST, PWM1P0_IRQn, &pwm1_var},
group-onsemi 0:098463de4c5d 52 {PWM_1_2, PWM1_MODULE, CLK_CLKSEL2_PWM1SEL_PCLK1, 0, PWM1_RST, PWM1P1_IRQn, &pwm1_var},
group-onsemi 0:098463de4c5d 53 {PWM_1_3, PWM1_MODULE, CLK_CLKSEL2_PWM1SEL_PCLK1, 0, PWM1_RST, PWM1P1_IRQn, &pwm1_var},
group-onsemi 0:098463de4c5d 54 {PWM_1_4, PWM1_MODULE, CLK_CLKSEL2_PWM1SEL_PCLK1, 0, PWM1_RST, PWM1P2_IRQn, &pwm1_var},
group-onsemi 0:098463de4c5d 55 {PWM_1_5, PWM1_MODULE, CLK_CLKSEL2_PWM1SEL_PCLK1, 0, PWM1_RST, PWM1P2_IRQn, &pwm1_var},
group-onsemi 0:098463de4c5d 56
group-onsemi 0:098463de4c5d 57 {NC, 0, 0, 0, 0, (IRQn_Type) 0, NULL}
group-onsemi 0:098463de4c5d 58 };
group-onsemi 0:098463de4c5d 59
group-onsemi 0:098463de4c5d 60 static void pwmout_config(pwmout_t* obj);
group-onsemi 0:098463de4c5d 61
group-onsemi 0:098463de4c5d 62 void pwmout_init(pwmout_t* obj, PinName pin)
group-onsemi 0:098463de4c5d 63 {
group-onsemi 0:098463de4c5d 64 obj->pwm = (PWMName) pinmap_peripheral(pin, PinMap_PWM);
group-onsemi 0:098463de4c5d 65 MBED_ASSERT((int) obj->pwm != NC);
group-onsemi 0:098463de4c5d 66
group-onsemi 0:098463de4c5d 67 const struct nu_modinit_s *modinit = get_modinit(obj->pwm, pwm_modinit_tab);
group-onsemi 0:098463de4c5d 68 MBED_ASSERT(modinit != NULL);
group-onsemi 0:098463de4c5d 69 MBED_ASSERT(modinit->modname == obj->pwm);
group-onsemi 0:098463de4c5d 70
group-onsemi 0:098463de4c5d 71 // NOTE: All channels (identified by PWMName) share a PWM module. This reset will also affect other channels of the same PWM module.
group-onsemi 0:098463de4c5d 72 if (! ((struct nu_pwm_var *) modinit->var)->en_msk) {
group-onsemi 0:098463de4c5d 73 // Reset this module if no channel enabled
group-onsemi 0:098463de4c5d 74 SYS_ResetModule(modinit->rsetidx);
group-onsemi 0:098463de4c5d 75 }
group-onsemi 0:098463de4c5d 76
group-onsemi 0:098463de4c5d 77 PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm);
group-onsemi 0:098463de4c5d 78 uint32_t chn = NU_MODSUBINDEX(obj->pwm);
group-onsemi 0:098463de4c5d 79
group-onsemi 0:098463de4c5d 80 // NOTE: Channels 0/1/2/3/4/5 share a clock source.
group-onsemi 0:098463de4c5d 81 if ((((struct nu_pwm_var *) modinit->var)->en_msk & 0x3F) == 0) {
group-onsemi 0:098463de4c5d 82 // Select clock source of paired channels
group-onsemi 0:098463de4c5d 83 CLK_SetModuleClock(modinit->clkidx, modinit->clksrc, modinit->clkdiv);
group-onsemi 0:098463de4c5d 84 // Enable clock of paired channels
group-onsemi 0:098463de4c5d 85 CLK_EnableModuleClock(modinit->clkidx);
group-onsemi 0:098463de4c5d 86 }
group-onsemi 0:098463de4c5d 87
group-onsemi 0:098463de4c5d 88 // Wire pinout
group-onsemi 0:098463de4c5d 89 pinmap_pinout(pin, PinMap_PWM);
group-onsemi 0:098463de4c5d 90
group-onsemi 0:098463de4c5d 91 // Default: period = 10 ms, pulse width = 0 ms
group-onsemi 0:098463de4c5d 92 obj->period_us = 1000 * 10;
group-onsemi 0:098463de4c5d 93 obj->pulsewidth_us = 0;
group-onsemi 0:098463de4c5d 94 pwmout_config(obj);
group-onsemi 0:098463de4c5d 95
group-onsemi 0:098463de4c5d 96 // Enable output of the specified PWM channel
group-onsemi 0:098463de4c5d 97 PWM_EnableOutput(pwm_base, 1 << chn);
group-onsemi 0:098463de4c5d 98 PWM_Start(pwm_base, 1 << chn);
group-onsemi 0:098463de4c5d 99
group-onsemi 0:098463de4c5d 100 ((struct nu_pwm_var *) modinit->var)->en_msk |= 1 << chn;
group-onsemi 0:098463de4c5d 101
group-onsemi 0:098463de4c5d 102 // Mark this module to be inited.
group-onsemi 0:098463de4c5d 103 int i = modinit - pwm_modinit_tab;
group-onsemi 0:098463de4c5d 104 pwm_modinit_mask |= 1 << i;
group-onsemi 0:098463de4c5d 105 }
group-onsemi 0:098463de4c5d 106
group-onsemi 0:098463de4c5d 107 void pwmout_free(pwmout_t* obj)
group-onsemi 0:098463de4c5d 108 {
group-onsemi 0:098463de4c5d 109 PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm);
group-onsemi 0:098463de4c5d 110 uint32_t chn = NU_MODSUBINDEX(obj->pwm);
group-onsemi 0:098463de4c5d 111 PWM_ForceStop(pwm_base, 1 << chn);
group-onsemi 0:098463de4c5d 112
group-onsemi 0:098463de4c5d 113 const struct nu_modinit_s *modinit = get_modinit(obj->pwm, pwm_modinit_tab);
group-onsemi 0:098463de4c5d 114 MBED_ASSERT(modinit != NULL);
group-onsemi 0:098463de4c5d 115 MBED_ASSERT(modinit->modname == obj->pwm);
group-onsemi 0:098463de4c5d 116 ((struct nu_pwm_var *) modinit->var)->en_msk &= ~(1 << chn);
group-onsemi 0:098463de4c5d 117
group-onsemi 0:098463de4c5d 118
group-onsemi 0:098463de4c5d 119 if ((((struct nu_pwm_var *) modinit->var)->en_msk & 0x3F) == 0) {
group-onsemi 0:098463de4c5d 120 CLK_DisableModuleClock(modinit->clkidx);
group-onsemi 0:098463de4c5d 121 }
group-onsemi 0:098463de4c5d 122
group-onsemi 0:098463de4c5d 123 // Mark this module to be deinited.
group-onsemi 0:098463de4c5d 124 int i = modinit - pwm_modinit_tab;
group-onsemi 0:098463de4c5d 125 pwm_modinit_mask &= ~(1 << i);
group-onsemi 0:098463de4c5d 126 }
group-onsemi 0:098463de4c5d 127
group-onsemi 0:098463de4c5d 128 void pwmout_write(pwmout_t* obj, float value)
group-onsemi 0:098463de4c5d 129 {
group-onsemi 0:098463de4c5d 130 obj->pulsewidth_us = NU_CLAMP((uint32_t) (value * obj->period_us), 0, obj->period_us);
group-onsemi 0:098463de4c5d 131 pwmout_config(obj);
group-onsemi 0:098463de4c5d 132 }
group-onsemi 0:098463de4c5d 133
group-onsemi 0:098463de4c5d 134 float pwmout_read(pwmout_t* obj)
group-onsemi 0:098463de4c5d 135 {
group-onsemi 0:098463de4c5d 136 return NU_CLAMP((((float) obj->pulsewidth_us) / obj->period_us), 0.0f, 1.0f);
group-onsemi 0:098463de4c5d 137 }
group-onsemi 0:098463de4c5d 138
group-onsemi 0:098463de4c5d 139 void pwmout_period(pwmout_t* obj, float seconds)
group-onsemi 0:098463de4c5d 140 {
group-onsemi 0:098463de4c5d 141 pwmout_period_us(obj, seconds * 1000000.0f);
group-onsemi 0:098463de4c5d 142 }
group-onsemi 0:098463de4c5d 143
group-onsemi 0:098463de4c5d 144 void pwmout_period_ms(pwmout_t* obj, int ms)
group-onsemi 0:098463de4c5d 145 {
group-onsemi 0:098463de4c5d 146 pwmout_period_us(obj, ms * 1000);
group-onsemi 0:098463de4c5d 147 }
group-onsemi 0:098463de4c5d 148
group-onsemi 0:098463de4c5d 149 // Set the PWM period, keeping the duty cycle the same.
group-onsemi 0:098463de4c5d 150 void pwmout_period_us(pwmout_t* obj, int us)
group-onsemi 0:098463de4c5d 151 {
group-onsemi 0:098463de4c5d 152 uint32_t period_us_old = obj->period_us;
group-onsemi 0:098463de4c5d 153 uint32_t pulsewidth_us_old = obj->pulsewidth_us;
group-onsemi 0:098463de4c5d 154 obj->period_us = us;
group-onsemi 0:098463de4c5d 155 obj->pulsewidth_us = NU_CLAMP(obj->period_us * pulsewidth_us_old / period_us_old, 0, obj->period_us);
group-onsemi 0:098463de4c5d 156 pwmout_config(obj);
group-onsemi 0:098463de4c5d 157 }
group-onsemi 0:098463de4c5d 158
group-onsemi 0:098463de4c5d 159 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
group-onsemi 0:098463de4c5d 160 {
group-onsemi 0:098463de4c5d 161 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
group-onsemi 0:098463de4c5d 162 }
group-onsemi 0:098463de4c5d 163
group-onsemi 0:098463de4c5d 164 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
group-onsemi 0:098463de4c5d 165 {
group-onsemi 0:098463de4c5d 166 pwmout_pulsewidth_us(obj, ms * 1000);
group-onsemi 0:098463de4c5d 167 }
group-onsemi 0:098463de4c5d 168
group-onsemi 0:098463de4c5d 169 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
group-onsemi 0:098463de4c5d 170 {
group-onsemi 0:098463de4c5d 171 obj->pulsewidth_us = NU_CLAMP(us, 0, obj->period_us);
group-onsemi 0:098463de4c5d 172 pwmout_config(obj);
group-onsemi 0:098463de4c5d 173 }
group-onsemi 0:098463de4c5d 174
group-onsemi 0:098463de4c5d 175 int pwmout_allow_powerdown(void)
group-onsemi 0:098463de4c5d 176 {
group-onsemi 0:098463de4c5d 177 uint32_t modinit_mask = pwm_modinit_mask;
group-onsemi 0:098463de4c5d 178 while (modinit_mask) {
group-onsemi 0:098463de4c5d 179 int pwm_idx = nu_ctz(modinit_mask);
group-onsemi 0:098463de4c5d 180 const struct nu_modinit_s *modinit = pwm_modinit_tab + pwm_idx;
group-onsemi 0:098463de4c5d 181 if (modinit->modname != NC) {
group-onsemi 0:098463de4c5d 182 PWM_T *pwm_base = (PWM_T *) NU_MODBASE(modinit->modname);
group-onsemi 0:098463de4c5d 183 uint32_t chn = NU_MODSUBINDEX(modinit->modname);
group-onsemi 0:098463de4c5d 184 // Disallow entering power-down mode if PWM counter is enabled.
group-onsemi 0:098463de4c5d 185 if ((pwm_base->CNTEN & (1 << chn)) && pwm_base->CMPDAT[chn]) {
group-onsemi 0:098463de4c5d 186 return 0;
group-onsemi 0:098463de4c5d 187 }
group-onsemi 0:098463de4c5d 188 }
group-onsemi 0:098463de4c5d 189 modinit_mask &= ~(1 << pwm_idx);
group-onsemi 0:098463de4c5d 190 }
group-onsemi 0:098463de4c5d 191
group-onsemi 0:098463de4c5d 192 return 1;
group-onsemi 0:098463de4c5d 193 }
group-onsemi 0:098463de4c5d 194
group-onsemi 0:098463de4c5d 195 static void pwmout_config(pwmout_t* obj)
group-onsemi 0:098463de4c5d 196 {
group-onsemi 0:098463de4c5d 197 PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm);
group-onsemi 0:098463de4c5d 198 uint32_t chn = NU_MODSUBINDEX(obj->pwm);
group-onsemi 0:098463de4c5d 199 // NOTE: Support period < 1s
group-onsemi 0:098463de4c5d 200 //PWM_ConfigOutputChannel(pwm_base, chn, 1000 * 1000 / obj->period_us, obj->pulsewidth_us * 100 / obj->period_us);
group-onsemi 0:098463de4c5d 201 PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
group-onsemi 0:098463de4c5d 202 }
group-onsemi 0:098463de4c5d 203
group-onsemi 0:098463de4c5d 204 #endif