Diff: targets/hal/TARGET_Freescale/TARGET_K20D50M/pwmout_api.c

Revision:

445:3312ed629f01

Parent:

444:d80869345ae6

Child:

446:b421ac8a7b41

--- a/targets/hal/TARGET_Freescale/TARGET_K20D50M/pwmout_api.c	Wed Jan 14 09:30:07 2015 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,135 +0,0 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2006-2013 ARM Limited
- *
- * 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 "mbed_assert.h"
-#include "pwmout_api.h"
-
-#include "cmsis.h"
-#include "pinmap.h"
-
-static const PinMap PinMap_PWM[] = {
-    // LEDs
-    {LED_RED  , PWM_3 , 4}, // PTC3, FTM0 CH2
-    {LED_GREEN, PWM_5,  4}, // PTD4, FTM0 CH4
-    {LED_BLUE , PWM_8 , 3}, // PTA2, FTM0 CH7
-
-    // Arduino digital pinout
-    {D3,  PWM_5 , 4}, // PTD4, FTM0 CH4
-    {D5,  PWM_7 , 3}, // PTA1, FTM0 CH6
-    {D6,  PWM_3 , 4}, // PTC3, FTM0 CH2
-    {D9,  PWM_6 , 4}, // PTD5, FTM0 CH6
-    {D10, PWM_2 , 4}, // PTC2, FTM0 CH1
-
-    {PTA0,  PWM_6 , 3}, // PTA0, FTM0 CH5
-    {PTA3,  PWM_1 , 3}, // PTA3, FTM0 CH0
-    {PTA4,  PWM_2 , 3}, // PTA4, FTM0 CH1
-    {PTA5,  PWM_3 , 3}, // PTA5, FTM0 CH2
-    {PTA12, PWM_9 , 3}, // PTA12, FTM1 CH0
-    {PTA13, PWM_10, 3}, // PTA13, FTM1 CH1
-    {PTB0,  PWM_9 , 3}, // PTB0, FTM1 CH0
-    {PTB1,  PWM_10, 3}, // PTB1, FTM1 CH1
-    {PTC1,  PWM_1 , 4}, // PTC1, FTM0 CH0
-    {PTD4,  PWM_4 , 4}, // PTD4, FTM0 CH3
-    {PTD6,  PWM_7 , 4}, // PTD6, FTM0 CH6
-    {PTD7,  PWM_8 , 4}, // PTD7, FTM0 CH7
-
-    {NC , NC    , 0}
-};
-
-static float pwm_clock = 0;
-
-void pwmout_init(pwmout_t* obj, PinName pin) {
-    // determine the channel
-    PWMName pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
-    MBED_ASSERT(pwm != (PWMName)NC);
-
-    uint32_t clkdiv = 0;
-    float clkval = SystemCoreClock / 1000000.0f;
-
-    while (clkval > 1) {
-        clkdiv++;
-        clkval /= 2.0;
-        if (clkdiv == 7)
-            break;
-    }
-
-    pwm_clock = clkval;
-    unsigned int port = (unsigned int)pin >> PORT_SHIFT;
-    unsigned int ftm_n = (pwm >> TPM_SHIFT);
-    unsigned int ch_n = (pwm & 0xFF);
-
-    SIM->SCGC5 |= 1 << (SIM_SCGC5_PORTA_SHIFT + port);
-    SIM->SCGC6 |= 1 << (SIM_SCGC6_FTM0_SHIFT + ftm_n);
-
-    FTM_Type *ftm = (FTM_Type *)(FTM0_BASE + 0x1000 * ftm_n);
-    ftm->CONF |= FTM_CONF_BDMMODE(3);
-    ftm->SC = FTM_SC_CLKS(1) | FTM_SC_PS(clkdiv); // (clock)MHz / clkdiv ~= (0.75)MHz
-    ftm->CONTROLS[ch_n].CnSC = (FTM_CnSC_MSB_MASK | FTM_CnSC_ELSB_MASK); /* No Interrupts; High True pulses on Edge Aligned PWM */
-
-    obj->CnV = &ftm->CONTROLS[ch_n].CnV;
-    obj->MOD = &ftm->MOD;
-    obj->CNT = &ftm->CNT;
-
-    // default to 20ms: standard for servos, and fine for e.g. brightness control
-    pwmout_period_ms(obj, 20);
-    pwmout_write(obj, 0);
-
-    // Wire pinout
-    pinmap_pinout(pin, PinMap_PWM);
-}
-
-void pwmout_free(pwmout_t* obj) {}
-
-void pwmout_write(pwmout_t* obj, float value) {
-    if (value < 0.0) {
-        value = 0.0;
-    } else if (value > 1.0) {
-        value = 1.0;
-    }
-
-    *obj->CnV = (uint32_t)((float)(*obj->MOD + 1) * value);
-}
-
-float pwmout_read(pwmout_t* obj) {
-    float v = (float)(*obj->CnV) / (float)(*obj->MOD + 1);
-    return (v > 1.0) ? (1.0) : (v);
-}
-
-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) {
-    float dc = pwmout_read(obj);
-    *obj->MOD = (uint32_t)(pwm_clock * (float)us) - 1;
-    pwmout_write(obj, dc);
-}
-
-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->CnV = (uint32_t)(pwm_clock * (float)us);
-}