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Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/TARGET_K64F/pwmout_api.c@150:49699a7d7064, 2014-04-04 (annotated)

Committer:
mbed_official
Date:
Fri Apr 04 10:45:08 2014 +0100
Revision:
150:49699a7d7064
Parent:
149:1fb5f62b92bd
Child:
152:3248c4875353
Synchronized with git revision d4566711265f6e274f03a79a4819636519bf3a42



Full URL: https://github.com/mbedmicro/mbed/commit/d4566711265f6e274f03a79a4819636519bf3a42/



K64F - port HAL corrections, pwm clock configuration store

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 146:f64d43ff0c18 1 /* mbed Microcontroller Library
mbed_official 146:f64d43ff0c18 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 146:f64d43ff0c18 3 *
mbed_official 146:f64d43ff0c18 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 146:f64d43ff0c18 5 * you may not use this file except in compliance with the License.
mbed_official 146:f64d43ff0c18 6 * You may obtain a copy of the License at
mbed_official 146:f64d43ff0c18 7 *
mbed_official 146:f64d43ff0c18 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 146:f64d43ff0c18 9 *
mbed_official 146:f64d43ff0c18 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 146:f64d43ff0c18 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 146:f64d43ff0c18 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 146:f64d43ff0c18 13 * See the License for the specific language governing permissions and
mbed_official 146:f64d43ff0c18 14 * limitations under the License.
mbed_official 146:f64d43ff0c18 15 */
mbed_official 146:f64d43ff0c18 16 #include "pwmout_api.h"
mbed_official 146:f64d43ff0c18 17
mbed_official 146:f64d43ff0c18 18 #include "cmsis.h"
mbed_official 146:f64d43ff0c18 19 #include "pinmap.h"
mbed_official 146:f64d43ff0c18 20 #include "error.h"
mbed_official 146:f64d43ff0c18 21 #include "fsl_ftm_hal.h"
mbed_official 146:f64d43ff0c18 22 #include "fsl_mcg_hal.h"
mbed_official 146:f64d43ff0c18 23 #include "fsl_clock_manager.h"
mbed_official 146:f64d43ff0c18 24
mbed_official 146:f64d43ff0c18 25 static const PinMap PinMap_PWM[] = {
mbed_official 147:39a1839cac63 26 {PTA0 , PWM_6 , 3},
mbed_official 147:39a1839cac63 27 {PTA1 , PWM_7 , 3},
mbed_official 147:39a1839cac63 28 {PTA2 , PWM_8 , 3},
mbed_official 147:39a1839cac63 29 {PTA3 , PWM_1 , 3},
mbed_official 147:39a1839cac63 30 {PTA4 , PWM_2 , 3},
mbed_official 147:39a1839cac63 31 {PTA5 , PWM_3 , 3},
mbed_official 147:39a1839cac63 32 {PTA6 , PWM_4 , 3},
mbed_official 147:39a1839cac63 33 {PTA7 , PWM_5 , 3},
mbed_official 147:39a1839cac63 34 {PTA8 , PWM_9 , 3},
mbed_official 147:39a1839cac63 35 {PTA9 , PWM_10, 3},
mbed_official 147:39a1839cac63 36 {PTA10, PWM_17, 3},
mbed_official 147:39a1839cac63 37 {PTA11, PWM_18, 3},
mbed_official 147:39a1839cac63 38 {PTA12, PWM_9 , 3},
mbed_official 147:39a1839cac63 39 {PTA13, PWM_10, 3},
mbed_official 147:39a1839cac63 40
mbed_official 147:39a1839cac63 41 {PTB0 , PWM_9 , 3},
mbed_official 147:39a1839cac63 42 {PTB1 , PWM_10, 3},
mbed_official 146:f64d43ff0c18 43 {PTB18, PWM_17, 3},
mbed_official 147:39a1839cac63 44 {PTB19, PWM_18, 3},
mbed_official 147:39a1839cac63 45
mbed_official 147:39a1839cac63 46 {PTC1 , PWM_1 , 4},
mbed_official 147:39a1839cac63 47 {PTC2 , PWM_2 , 4},
mbed_official 147:39a1839cac63 48 {PTC3 , PWM_3 , 4},
mbed_official 147:39a1839cac63 49 {PTC4 , PWM_4 , 4},
mbed_official 147:39a1839cac63 50 {PTC5 , PWM_3 , 7},
mbed_official 147:39a1839cac63 51 {PTC8 , PWM_29, 3},
mbed_official 147:39a1839cac63 52 {PTC9 , PWM_30, 3},
mbed_official 147:39a1839cac63 53 {PTC10, PWM_31, 3},
mbed_official 147:39a1839cac63 54 {PTC11, PWM_32, 3},
mbed_official 147:39a1839cac63 55
mbed_official 147:39a1839cac63 56 {PTD0 , PWM_25, 4},
mbed_official 147:39a1839cac63 57 {PTD1 , PWM_26, 4},
mbed_official 147:39a1839cac63 58 {PTD2 , PWM_27, 4},
mbed_official 147:39a1839cac63 59 {PTD3 , PWM_28, 4},
mbed_official 147:39a1839cac63 60 {PTD4 , PWM_5 , 4},
mbed_official 147:39a1839cac63 61 {PTD5 , PWM_6 , 4},
mbed_official 147:39a1839cac63 62 {PTD6 , PWM_7 , 4},
mbed_official 147:39a1839cac63 63 {PTD4 , PWM_5 , 4},
mbed_official 147:39a1839cac63 64 {PTD7 , PWM_8 , 4},
mbed_official 147:39a1839cac63 65
mbed_official 147:39a1839cac63 66 {PTE5 , PWM_25, 6},
mbed_official 147:39a1839cac63 67 {PTE6 , PWM_26, 6},
mbed_official 147:39a1839cac63 68
mbed_official 146:f64d43ff0c18 69 {NC , NC , 0}
mbed_official 146:f64d43ff0c18 70 };
mbed_official 146:f64d43ff0c18 71
mbed_official 146:f64d43ff0c18 72 static float pwm_clock;
mbed_official 146:f64d43ff0c18 73
mbed_official 146:f64d43ff0c18 74 void pwmout_init(pwmout_t* obj, PinName pin) {
mbed_official 146:f64d43ff0c18 75 PWMName pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 146:f64d43ff0c18 76 if (pwm == (PWMName)NC) {
mbed_official 146:f64d43ff0c18 77 error("PwmOut pin mapping failed");
mbed_official 146:f64d43ff0c18 78 }
mbed_official 146:f64d43ff0c18 79 obj->pwm_name = pwm;
mbed_official 146:f64d43ff0c18 80
mbed_official 146:f64d43ff0c18 81 float clkval = clock_hal_get_fllclk() / 1000000.0f;
mbed_official 146:f64d43ff0c18 82 uint32_t clkdiv = 0;
mbed_official 146:f64d43ff0c18 83 while (clkval > 1) {
mbed_official 146:f64d43ff0c18 84 clkdiv++;
mbed_official 146:f64d43ff0c18 85 clkval /= 2.0f;
mbed_official 146:f64d43ff0c18 86 if (clkdiv == 7) {
mbed_official 146:f64d43ff0c18 87 break;
mbed_official 146:f64d43ff0c18 88 }
mbed_official 146:f64d43ff0c18 89 }
mbed_official 150:49699a7d7064 90
mbed_official 150:49699a7d7064 91 pwm_clock = clkval;
mbed_official 146:f64d43ff0c18 92 uint32_t channel = pwm & 0xF;
mbed_official 146:f64d43ff0c18 93 uint32_t instance = pwm >> TPM_SHIFT;
mbed_official 146:f64d43ff0c18 94 clock_manager_set_gate(kClockModuleFTM, instance, true);
mbed_official 150:49699a7d7064 95 ftm_hal_set_tof_frequency(instance, 3);
mbed_official 146:f64d43ff0c18 96 ftm_hal_set_clock_ps(instance, (ftm_clock_ps_t)clkdiv);
mbed_official 146:f64d43ff0c18 97 ftm_hal_set_clock_source(instance, kClock_source_FTM_SystemClk);
mbed_official 146:f64d43ff0c18 98 ftm_hal_set_channel_edge_level(instance, channel, 2);
mbed_official 146:f64d43ff0c18 99 // default to 20ms: standard for servos, and fine for e.g. brightness control
mbed_official 146:f64d43ff0c18 100 pwmout_period_ms(obj, 20);
mbed_official 146:f64d43ff0c18 101 pwmout_write (obj, 0);
mbed_official 146:f64d43ff0c18 102
mbed_official 146:f64d43ff0c18 103 // Wire pinout
mbed_official 146:f64d43ff0c18 104 pinmap_pinout(pin, PinMap_PWM);
mbed_official 146:f64d43ff0c18 105 }
mbed_official 146:f64d43ff0c18 106
mbed_official 146:f64d43ff0c18 107 void pwmout_free(pwmout_t* obj) {
mbed_official 146:f64d43ff0c18 108 }
mbed_official 146:f64d43ff0c18 109
mbed_official 146:f64d43ff0c18 110 void pwmout_write(pwmout_t* obj, float value) {
mbed_official 146:f64d43ff0c18 111 if (value < 0.0f) {
mbed_official 146:f64d43ff0c18 112 value = 0.0f;
mbed_official 146:f64d43ff0c18 113 } else if (value > 1.0f) {
mbed_official 146:f64d43ff0c18 114 value = 1.0f;
mbed_official 146:f64d43ff0c18 115 }
mbed_official 146:f64d43ff0c18 116 uint16_t mod = ftm_hal_get_mod(obj->pwm_name >> TPM_SHIFT);
mbed_official 146:f64d43ff0c18 117 uint32_t new_count = (uint32_t)((float)(mod) * value);
mbed_official 146:f64d43ff0c18 118 ftm_hal_set_channel_count_value(obj->pwm_name >> TPM_SHIFT, obj->pwm_name & 0xF, new_count);
mbed_official 146:f64d43ff0c18 119 }
mbed_official 146:f64d43ff0c18 120
mbed_official 146:f64d43ff0c18 121 float pwmout_read(pwmout_t* obj) {
mbed_official 146:f64d43ff0c18 122 uint16_t count = ftm_hal_get_channel_count_value(obj->pwm_name >> TPM_SHIFT, obj->pwm_name & 0xF, 0);
mbed_official 146:f64d43ff0c18 123 uint16_t mod = ftm_hal_get_mod(obj->pwm_name >> TPM_SHIFT);
mbed_official 146:f64d43ff0c18 124 float v = (float)(count) / (float)(mod);
mbed_official 146:f64d43ff0c18 125 return (v > 1.0f) ? (1.0f) : (v);
mbed_official 146:f64d43ff0c18 126 }
mbed_official 146:f64d43ff0c18 127
mbed_official 146:f64d43ff0c18 128 void pwmout_period(pwmout_t* obj, float seconds) {
mbed_official 146:f64d43ff0c18 129 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 146:f64d43ff0c18 130 }
mbed_official 146:f64d43ff0c18 131
mbed_official 146:f64d43ff0c18 132 void pwmout_period_ms(pwmout_t* obj, int ms) {
mbed_official 146:f64d43ff0c18 133 pwmout_period_us(obj, ms * 1000);
mbed_official 146:f64d43ff0c18 134 }
mbed_official 146:f64d43ff0c18 135
mbed_official 146:f64d43ff0c18 136 // Set the PWM period, keeping the duty cycle the same.
mbed_official 146:f64d43ff0c18 137 void pwmout_period_us(pwmout_t* obj, int us) {
mbed_official 146:f64d43ff0c18 138 float dc = pwmout_read(obj);
mbed_official 146:f64d43ff0c18 139 ftm_hal_set_mod(obj->pwm_name >> TPM_SHIFT, (uint32_t)(pwm_clock * (float)us));
mbed_official 146:f64d43ff0c18 140 pwmout_write(obj, dc);
mbed_official 146:f64d43ff0c18 141
mbed_official 146:f64d43ff0c18 142 }
mbed_official 146:f64d43ff0c18 143
mbed_official 146:f64d43ff0c18 144 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
mbed_official 146:f64d43ff0c18 145 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 146:f64d43ff0c18 146 }
mbed_official 146:f64d43ff0c18 147
mbed_official 146:f64d43ff0c18 148 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
mbed_official 146:f64d43ff0c18 149 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 146:f64d43ff0c18 150 }
mbed_official 146:f64d43ff0c18 151
mbed_official 146:f64d43ff0c18 152 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 146:f64d43ff0c18 153 uint32_t value = (uint32_t)(pwm_clock * (float)us);
mbed_official 146:f64d43ff0c18 154 ftm_hal_set_channel_count_value(obj->pwm_name >> TPM_SHIFT, obj->pwm_name & 0xF, value);
mbed_official 146:f64d43ff0c18 155 }