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

Revision:

267:8673334f2cbe

Parent:

266:69e8a32876bd

Child:

268:402bcc0c870b

--- a/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/pwmout_api.c	Thu Jul 24 12:00:06 2014 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,172 +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"
-#include "fsl_ftm_hal.h"
-#include "fsl_mcg_hal.h"
-#include "fsl_clock_manager.h"
-
-static const PinMap PinMap_PWM[] = {
-    {PTA0 , PWM_6 , 3},
-    {PTA1 , PWM_7 , 3},
-    {PTA2 , PWM_8 , 3},
-    {PTA3 , PWM_1 , 3},
-    {PTA4 , PWM_2 , 3},
-    {PTA5 , PWM_3 , 3},
-    {PTA6 , PWM_4 , 3},
-    {PTA7 , PWM_5 , 3},
-    {PTA8 , PWM_9 , 3},
-    {PTA9 , PWM_10, 3},
-    {PTA10, PWM_17, 3},
-    {PTA11, PWM_18, 3},
-    {PTA12, PWM_9 , 3},
-    {PTA13, PWM_10, 3},
-    
-    {PTB0 , PWM_9 , 3},
-    {PTB1 , PWM_10, 3},
-    {PTB18, PWM_17, 3},
-    {PTB19, PWM_18, 3},
-    
-    {PTC1 , PWM_1 , 4},
-    {PTC2 , PWM_2 , 4},
-    {PTC3 , PWM_3 , 4},
-    {PTC4 , PWM_4 , 4},
-    {PTC5 , PWM_3 , 7},
-    {PTC8 , PWM_29, 3},
-    {PTC9 , PWM_30, 3},
-    {PTC10, PWM_31, 3},
-    {PTC11, PWM_32, 3},
-    
-    {PTD0 , PWM_25, 4},
-    {PTD1 , PWM_26, 4},
-    {PTD2 , PWM_27, 4},
-    {PTD3 , PWM_28, 4},
-    {PTD4 , PWM_5 , 4},
-    {PTD5 , PWM_6 , 4},
-    {PTD6 , PWM_7 , 4},
-    {PTD4 , PWM_5 , 4},
-    {PTD7 , PWM_8 , 4},
-    
-    {PTE5 , PWM_25, 6},
-    {PTE6 , PWM_26, 6},
-        
-    {NC   , NC    , 0}
-};
-
-static float pwm_clock_mhz;
-
-void pwmout_init(pwmout_t* obj, PinName pin) {
-    PWMName pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
-    MBED_ASSERT(pwm != (PWMName)NC);
-
-    obj->pwm_name = pwm;
-
-    uint32_t pwm_base_clock;
-    clock_manager_get_frequency(kBusClock, &pwm_base_clock);
-    float clkval = (float)pwm_base_clock / 1000000.0f;
-    uint32_t clkdiv = 0;
-    while (clkval > 1) {
-        clkdiv++;
-        clkval /= 2.0f;
-        if (clkdiv == 7) {
-            break;
-        }
-    }
-
-    pwm_clock_mhz = clkval;
-    uint32_t channel = pwm & 0xF;
-    uint32_t instance = pwm >> TPM_SHIFT;
-    clock_manager_set_gate(kClockModuleFTM, instance, true);
-    ftm_hal_set_tof_frequency(instance, 3);
-    ftm_hal_set_clock_source(instance, kClock_source_FTM_SystemClk);
-    ftm_hal_set_clock_ps(instance, (ftm_clock_ps_t)clkdiv);
-    ftm_hal_set_counter_init_val(instance, 0);
-    // default to 20ms: standard for servos, and fine for e.g. brightness control
-    pwmout_period_ms(obj, 20);
-    pwmout_write    (obj, 0);
-    ftm_config_t config = {
-        .mode = kFtmEdgeAlignedPWM,
-        .channel = channel,
-        .edge_mode = {.ftm_pwm_edge_mode = kFtmHighTrue}
-    };
-    ftm_hal_enable_pwm_mode(instance, &config);
-
-    // Wire pinout
-    pinmap_pinout(pin, PinMap_PWM);
-}
-
-void pwmout_free(pwmout_t* obj) {
-}
-
-void pwmout_write(pwmout_t* obj, float value) {
-    uint32_t instance = obj->pwm_name >> TPM_SHIFT;
-    if (value < 0.0f) {
-        value = 0.0f;
-    } else if (value > 1.0f) {
-        value = 1.0f;
-    }
-    uint16_t mod = ftm_hal_get_mod(instance);
-    uint32_t new_count = (uint32_t)((float)(mod) * value);
-    // Stop FTM clock to ensure instant update of MOD register
-    ftm_hal_set_clock_source(instance, kClock_source_FTM_None);
-    ftm_hal_set_channel_count_value(instance, obj->pwm_name & 0xF, new_count);
-    ftm_hal_set_counter(instance, 0);
-    ftm_hal_set_clock_source(instance, kClock_source_FTM_SystemClk);
-}
-
-float pwmout_read(pwmout_t* obj) {
-    uint16_t count = ftm_hal_get_channel_count_value(obj->pwm_name >> TPM_SHIFT, obj->pwm_name & 0xF, 0);
-    uint16_t mod = ftm_hal_get_mod(obj->pwm_name >> TPM_SHIFT);
-    if (mod == 0)
-        return 0.0;
-    float v = (float)(count) / (float)(mod);
-    return (v > 1.0f) ? (1.0f) : (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) {
-    uint32_t instance = obj->pwm_name >> TPM_SHIFT;
-    float dc = pwmout_read(obj);
-    // Stop FTM clock to ensure instant update of MOD register
-    ftm_hal_set_clock_source(instance, kClock_source_FTM_None);
-    ftm_hal_set_mod(instance, (uint32_t)(pwm_clock_mhz * (float)us) - 1);
-    pwmout_write(obj, dc);
-    ftm_hal_set_clock_source(instance, kClock_source_FTM_SystemClk);
-}
-
-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) {
-    uint32_t value = (uint32_t)(pwm_clock_mhz * (float)us);
-    ftm_hal_set_channel_count_value(obj->pwm_name >> TPM_SHIFT, obj->pwm_name & 0xF, value);
-}