Diff: targets/TARGET_NUVOTON/TARGET_NUC472/pwmout_api.c

Revision:

153:9398a535854b

Parent:

152:9a67f0b066fc

--- a/targets/TARGET_NUVOTON/TARGET_NUC472/pwmout_api.c	Thu Dec 15 11:48:27 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,227 +0,0 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2015-2016 Nuvoton
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- 
-#include "pwmout_api.h"
-
-#if DEVICE_PWMOUT
-
-#include "cmsis.h"
-#include "pinmap.h"
-#include "PeripheralPins.h"
-#include "nu_modutil.h"
-#include "nu_miscutil.h"
-#include "nu_bitutil.h"
-
-struct nu_pwm_var {
-    uint32_t    en_msk;
-};
-
-static struct nu_pwm_var pwm0_var = {
-    .en_msk = 0
-};
-
-static struct nu_pwm_var pwm1_var = {
-    .en_msk = 0
-};
-
-static uint32_t pwm_modinit_mask = 0;
-
-// FIXME: PWM1 2/3 channels fail. PWM registers cannot write after their respective clocks are enabled.
-static const struct nu_modinit_s pwm_modinit_tab[] = {
-    {PWM_0_0, PWM0CH01_MODULE, CLK_CLKSEL2_PWM0CH01SEL_HIRC, 0, PWM0_RST, PWM0CH0_IRQn, &pwm0_var},
-    {PWM_0_1, PWM0CH01_MODULE, CLK_CLKSEL2_PWM0CH01SEL_HIRC, 0, PWM0_RST, PWM0CH1_IRQn, &pwm0_var},
-    {PWM_0_2, PWM0CH23_MODULE, CLK_CLKSEL2_PWM0CH23SEL_HIRC, 0, PWM0_RST, PWM0CH2_IRQn, &pwm0_var},
-    {PWM_0_3, PWM0CH23_MODULE, CLK_CLKSEL2_PWM0CH23SEL_HIRC, 0, PWM0_RST, PWM0CH3_IRQn, &pwm0_var},
-    {PWM_0_4, PWM0CH45_MODULE, CLK_CLKSEL2_PWM0CH45SEL_HIRC, 0, PWM0_RST, PWM0CH4_IRQn, &pwm0_var},
-    {PWM_0_5, PWM0CH45_MODULE, CLK_CLKSEL2_PWM0CH45SEL_HIRC, 0, PWM0_RST, PWM0CH5_IRQn, &pwm0_var},
-    
-    {PWM_1_0, PWM1CH01_MODULE, CLK_CLKSEL2_PWM1CH01SEL_HIRC, 0, PWM1_RST, PWM1CH0_IRQn, &pwm1_var},
-    {PWM_1_1, PWM1CH01_MODULE, CLK_CLKSEL2_PWM1CH01SEL_HIRC, 0, PWM1_RST, PWM1CH1_IRQn, &pwm1_var},
-    {PWM_1_2, PWM1CH23_MODULE, CLK_CLKSEL2_PWM1CH23SEL_HIRC, 0, PWM1_RST, PWM1CH2_IRQn, &pwm1_var},
-    {PWM_1_3, PWM1CH23_MODULE, CLK_CLKSEL2_PWM1CH23SEL_HIRC, 0, PWM1_RST, PWM1CH3_IRQn, &pwm1_var},
-    {PWM_1_4, PWM1CH45_MODULE, CLK_CLKSEL2_PWM1CH45SEL_HIRC, 0, PWM1_RST, PWM1CH4_IRQn, &pwm1_var},
-    {PWM_1_5, PWM1CH45_MODULE, CLK_CLKSEL2_PWM1CH45SEL_HIRC, 0, PWM1_RST, PWM1CH5_IRQn, &pwm1_var},
-    
-    {NC, 0, 0, 0, 0, (IRQn_Type) 0, NULL}
-};
-
-static void pwmout_config(pwmout_t* obj);
-
-void pwmout_init(pwmout_t* obj, PinName pin)
-{
-    obj->pwm = (PWMName) pinmap_peripheral(pin, PinMap_PWM);
-    MBED_ASSERT((int) obj->pwm != NC);
-
-    const struct nu_modinit_s *modinit = get_modinit(obj->pwm, pwm_modinit_tab);
-    MBED_ASSERT(modinit != NULL);
-    MBED_ASSERT(modinit->modname == obj->pwm);
-    
-    // NOTE: All channels (identified by PWMName) share a PWM module. This reset will also affect other channels of the same PWM module.
-    if (! ((struct nu_pwm_var *) modinit->var)->en_msk) {
-        // Reset this module if no channel enabled
-        SYS_ResetModule(modinit->rsetidx);
-    }
-    
-    PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm);
-    uint32_t chn =  NU_MODSUBINDEX(obj->pwm);
-        
-    // NOTE: Channels 0/1, 2/3, and 4/5 share a clock source.
-    if ((((struct nu_pwm_var *) modinit->var)->en_msk & (0x3 << (chn / 2 * 2))) == 0) {
-        // Select clock source of paired channels
-        CLK_SetModuleClock(modinit->clkidx, modinit->clksrc, modinit->clkdiv);
-        // Enable clock of paired channels
-        CLK_EnableModuleClock(modinit->clkidx);
-        
-        // FIXME: PWM_1_2/3 design bug. PWM_1_2/3 also require PWM_1_0/1 clock enabled.
-        if (obj->pwm == PWM_1_2 || obj->pwm == PWM_1_3) {
-            CLK_EnableModuleClock(PWM1CH01_MODULE);
-        }
-    }
-    
-    // Wire pinout
-    pinmap_pinout(pin, PinMap_PWM);
-    
-    // Default: period = 10 ms, pulse width = 0 ms
-    obj->period_us = 1000 * 10;
-    obj->pulsewidth_us = 0;
-    pwmout_config(obj);
-    
-    // Enable output of the specified PWM channel
-    PWM_EnableOutput(pwm_base, 1 << chn);
-    PWM_Start(pwm_base, 1 << chn);
-    
-    ((struct nu_pwm_var *) modinit->var)->en_msk |= 1 << chn;
-    
-    // Mark this module to be inited.
-    int i = modinit - pwm_modinit_tab;
-    pwm_modinit_mask |= 1 << i;
-}
-
-void pwmout_free(pwmout_t* obj)
-{
-    PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm);
-    uint32_t chn =  NU_MODSUBINDEX(obj->pwm);
-    PWM_ForceStop(pwm_base, 1 << chn);
-    
-    const struct nu_modinit_s *modinit = get_modinit(obj->pwm, pwm_modinit_tab);
-    MBED_ASSERT(modinit != NULL);
-    MBED_ASSERT(modinit->modname == obj->pwm);
-    ((struct nu_pwm_var *) modinit->var)->en_msk &= ~(1 << chn);
-    
-    
-    if ((((struct nu_pwm_var *) modinit->var)->en_msk & (0x3 << (chn / 2 * 2))) == 0) {
-        // FIXME: PWM_1_2/3 design bug. PWM_1_2/3 also require PWM_1_0/1 clock enabled.
-        switch (obj->pwm) {
-            case PWM_1_0:
-            case PWM_1_1:
-                if (pwm1_var.en_msk & 0xC) {
-                    break;
-                }
-            
-            case PWM_1_2:
-            case PWM_1_3:
-                if (! (pwm1_var.en_msk & 0x3)) {
-                    CLK_DisableModuleClock(PWM1CH01_MODULE);
-                }
-                
-            default:
-                // Disable clock of paired channels
-                CLK_DisableModuleClock(modinit->clkidx);
-        }
-    }
-    
-    // Mark this module to be deinited.
-    int i = modinit - pwm_modinit_tab;
-    pwm_modinit_mask &= ~(1 << i);
-}
-
-void pwmout_write(pwmout_t* obj, float value)
-{
-    obj->pulsewidth_us = NU_CLAMP((uint32_t) (value * obj->period_us), 0, obj->period_us);
-    pwmout_config(obj);
-}
-
-float pwmout_read(pwmout_t* obj)
-{
-    return NU_CLAMP((((float) obj->pulsewidth_us) / obj->period_us), 0.0f, 1.0f);
-}
-
-void pwmout_period(pwmout_t* obj, float seconds)
-{
-    pwmout_period_us(obj, seconds * 1000000.0f);
-}
-
-void pwmout_period_ms(pwmout_t* obj, int ms)
-{
-    pwmout_period_us(obj, ms * 1000);
-}
-
-// Set the PWM period, keeping the duty cycle the same.
-void pwmout_period_us(pwmout_t* obj, int us)
-{
-    uint32_t period_us_old = obj->period_us;
-    uint32_t pulsewidth_us_old = obj->pulsewidth_us;
-    obj->period_us = us;
-    obj->pulsewidth_us = NU_CLAMP(obj->period_us * pulsewidth_us_old / period_us_old, 0, obj->period_us);
-    pwmout_config(obj);
-}
-
-void pwmout_pulsewidth(pwmout_t* obj, float seconds)
-{
-    pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
-}
-
-void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
-{
-    pwmout_pulsewidth_us(obj, ms * 1000);
-}
-
-void pwmout_pulsewidth_us(pwmout_t* obj, int us)
-{
-    obj->pulsewidth_us = NU_CLAMP(us, 0, obj->period_us);
-    pwmout_config(obj);
-}
-
-int pwmout_allow_powerdown(void)
-{
-    uint32_t modinit_mask = pwm_modinit_mask;
-    while (modinit_mask) {
-        int pwm_idx = nu_ctz(modinit_mask);
-        const struct nu_modinit_s *modinit = pwm_modinit_tab + pwm_idx;
-        if (modinit->modname != NC) {
-            PWM_T *pwm_base = (PWM_T *) NU_MODBASE(modinit->modname);
-            uint32_t chn = NU_MODSUBINDEX(modinit->modname);
-            // Disallow entering power-down mode if PWM counter is enabled.
-            if ((pwm_base->CNTEN & (1 << chn)) && pwm_base->CMPDAT[chn]) {
-                return 0;
-            }
-        }
-        modinit_mask &= ~(1 << pwm_idx);
-    }
-    
-    return 1;
-}
-
-static void pwmout_config(pwmout_t* obj)
-{
-    PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm);
-    uint32_t chn = NU_MODSUBINDEX(obj->pwm);
-    // NOTE: Support period < 1s
-    //PWM_ConfigOutputChannel(pwm_base, chn, 1000 * 1000 / obj->period_us, obj->pulsewidth_us * 100 / obj->period_us);
-    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
-}
-
-#endif