Peter Drescher / mbed-F401

mbed library with additional peripherals for ST F401 board

Fork of mbed-src by mbed official

This mbed LIB has additional peripherals for ST F401 board

  • UART2 : PA_3 rx, PA_2 tx
  • UART3 : PC_7 rx, PC_6 tx
  • I2C2 : PB_3 SDA, PB_10 SCL
  • I2C3 : PB_4 SDA, PA_8 SCL

targets/hal/TARGET_Freescale/TARGET_KL25Z/pwmout_api.c@72:248c61396e08, 2014-01-13 (annotated)

Committer:
mbed_official
Date:
Mon Jan 13 10:45:05 2014 +0000
Revision:
72:248c61396e08
Parent:
20:4263a77256ae
Child:
74:847f030b50ee
Synchronized with git revision f1904ba15c06215a7530efd2d5a16c25af9d29ff



Full URL: https://github.com/mbedmicro/mbed/commit/f1904ba15c06215a7530efd2d5a16c25af9d29ff/



KL46Z: Added Sleep, LED3 and LED4 definitions, switches

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 10:3bc89ef62ce7 1 /* mbed Microcontroller Library
emilmont 10:3bc89ef62ce7 2 * Copyright (c) 2006-2013 ARM Limited
emilmont 10:3bc89ef62ce7 3 *
emilmont 10:3bc89ef62ce7 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 10:3bc89ef62ce7 5 * you may not use this file except in compliance with the License.
emilmont 10:3bc89ef62ce7 6 * You may obtain a copy of the License at
emilmont 10:3bc89ef62ce7 7 *
emilmont 10:3bc89ef62ce7 8 * http://www.apache.org/licenses/LICENSE-2.0
emilmont 10:3bc89ef62ce7 9 *
emilmont 10:3bc89ef62ce7 10 * Unless required by applicable law or agreed to in writing, software
emilmont 10:3bc89ef62ce7 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 10:3bc89ef62ce7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 10:3bc89ef62ce7 13 * See the License for the specific language governing permissions and
emilmont 10:3bc89ef62ce7 14 * limitations under the License.
emilmont 10:3bc89ef62ce7 15 */
emilmont 10:3bc89ef62ce7 16 #include "pwmout_api.h"
emilmont 10:3bc89ef62ce7 17
emilmont 10:3bc89ef62ce7 18 #include "cmsis.h"
emilmont 10:3bc89ef62ce7 19 #include "pinmap.h"
emilmont 10:3bc89ef62ce7 20 #include "error.h"
emilmont 10:3bc89ef62ce7 21
emilmont 10:3bc89ef62ce7 22 static const PinMap PinMap_PWM[] = {
emilmont 10:3bc89ef62ce7 23 // LEDs
emilmont 10:3bc89ef62ce7 24 {LED_RED , PWM_9 , 3}, // PTB18, TPM2 CH0
emilmont 10:3bc89ef62ce7 25 {LED_GREEN, PWM_10, 3}, // PTB19, TPM2 CH1
emilmont 10:3bc89ef62ce7 26 {LED_BLUE , PWM_2 , 4}, // PTD1 , TPM0 CH1
emilmont 10:3bc89ef62ce7 27
emilmont 10:3bc89ef62ce7 28 // Arduino digital pinout
emilmont 10:3bc89ef62ce7 29 {D0, PWM_9 , 3}, // PTA1 , TPM2 CH0
emilmont 10:3bc89ef62ce7 30 {D1, PWM_10, 3}, // PTA2 , TPM2 CH1
emilmont 10:3bc89ef62ce7 31 {D2, PWM_5 , 4}, // PTD4 , TPM0 CH4
emilmont 10:3bc89ef62ce7 32 {D3, PWM_7 , 3}, // PTA12, TPM1 CH0
emilmont 10:3bc89ef62ce7 33 {D4, PWM_2 , 3}, // PTA4 , TPM0 CH1
emilmont 10:3bc89ef62ce7 34 {D5, PWM_3 , 3}, // PTA5 , TPM0 CH2
emilmont 10:3bc89ef62ce7 35 {D6, PWM_5 , 3}, // PTC8 , TPM0 CH4
emilmont 10:3bc89ef62ce7 36 {D7, PWM_6 , 3}, // PTC9 , TPM0 CH5
emilmont 10:3bc89ef62ce7 37 {D8, PWM_8 , 3}, // PTA13, TPM1 CH1
emilmont 10:3bc89ef62ce7 38 {D9, PWM_6 , 4}, // PTD5 , TPM0 CH5
emilmont 10:3bc89ef62ce7 39 {D10, PWM_1 , 4}, // PTD0 , TPM0 CH0
emilmont 10:3bc89ef62ce7 40 {D11, PWM_3 , 4}, // PTD2 , TPM0 CH2
emilmont 10:3bc89ef62ce7 41 {D12, PWM_4 , 4}, // PTD3 , TPM0 CH3
bogdanm 20:4263a77256ae 42 {D13, PWM_2 , 4}, // PTD1 , TPM0 CH1,
bogdanm 20:4263a77256ae 43
bogdanm 20:4263a77256ae 44 {PTA0, PWM_6, 3},
bogdanm 20:4263a77256ae 45 {PTA3, PWM_1, 3},
bogdanm 20:4263a77256ae 46 {PTB0, PWM_7, 3},
bogdanm 20:4263a77256ae 47 {PTB1, PWM_8, 3},
bogdanm 20:4263a77256ae 48 {PTB2, PWM_9, 3},
bogdanm 20:4263a77256ae 49 {PTB3, PWM_10, 3},
bogdanm 20:4263a77256ae 50 {PTC1, PWM_1, 4},
bogdanm 20:4263a77256ae 51 {PTC2, PWM_2, 4},
bogdanm 20:4263a77256ae 52 {PTC3, PWM_3, 4},
bogdanm 20:4263a77256ae 53 {PTC4, PWM_4, 4},
bogdanm 20:4263a77256ae 54 {PTE20, PWM_7, 3},
bogdanm 20:4263a77256ae 55 {PTE21, PWM_8, 3},
bogdanm 20:4263a77256ae 56 {PTE22, PWM_9, 3},
bogdanm 20:4263a77256ae 57 {PTE23, PWM_10, 3},
bogdanm 20:4263a77256ae 58 {PTE24, PWM_1, 3},
bogdanm 20:4263a77256ae 59 {PTE25, PWM_2, 3},
bogdanm 20:4263a77256ae 60 {PTE29, PWM_3, 3},
bogdanm 20:4263a77256ae 61 {PTE30, PWM_4, 3},
bogdanm 20:4263a77256ae 62 {PTE31, PWM_5, 3},
bogdanm 20:4263a77256ae 63
emilmont 10:3bc89ef62ce7 64 {NC , NC , 0}
emilmont 10:3bc89ef62ce7 65 };
emilmont 10:3bc89ef62ce7 66
mbed_official 72:248c61396e08 67 static float pwm_clock;
emilmont 10:3bc89ef62ce7 68
emilmont 10:3bc89ef62ce7 69 void pwmout_init(pwmout_t* obj, PinName pin) {
emilmont 10:3bc89ef62ce7 70 // determine the channel
emilmont 10:3bc89ef62ce7 71 PWMName pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
bogdanm 19:398f4c622e1b 72 if (pwm == (PWMName)NC)
emilmont 10:3bc89ef62ce7 73 error("PwmOut pin mapping failed");
mbed_official 72:248c61396e08 74
mbed_official 72:248c61396e08 75 uint32_t clkdiv = 0;
mbed_official 72:248c61396e08 76 float clkval = SystemCoreClock / 1000000.0f;
mbed_official 72:248c61396e08 77
mbed_official 72:248c61396e08 78 while (clkval > 1) {
mbed_official 72:248c61396e08 79 clkdiv++;
mbed_official 72:248c61396e08 80 clkval /= 2.0;
mbed_official 72:248c61396e08 81 if (clkdiv == 7)
mbed_official 72:248c61396e08 82 break;
mbed_official 72:248c61396e08 83 }
mbed_official 72:248c61396e08 84
mbed_official 72:248c61396e08 85 pwm_clock = clkval;
emilmont 10:3bc89ef62ce7 86 unsigned int port = (unsigned int)pin >> PORT_SHIFT;
emilmont 10:3bc89ef62ce7 87 unsigned int tpm_n = (pwm >> TPM_SHIFT);
emilmont 10:3bc89ef62ce7 88 unsigned int ch_n = (pwm & 0xFF);
emilmont 10:3bc89ef62ce7 89
emilmont 10:3bc89ef62ce7 90 SIM->SCGC5 |= 1 << (SIM_SCGC5_PORTA_SHIFT + port);
emilmont 10:3bc89ef62ce7 91 SIM->SCGC6 |= 1 << (SIM_SCGC6_TPM0_SHIFT + tpm_n);
emilmont 10:3bc89ef62ce7 92 SIM->SOPT2 |= SIM_SOPT2_TPMSRC(1); // Clock source: MCGFLLCLK or MCGPLLCLK
emilmont 10:3bc89ef62ce7 93
emilmont 10:3bc89ef62ce7 94 TPM_Type *tpm = (TPM_Type *)(TPM0_BASE + 0x1000 * tpm_n);
mbed_official 72:248c61396e08 95 tpm->SC = TPM_SC_CMOD(1) | TPM_SC_PS(clkdiv); // (clock)MHz / clkdiv ~= (0.75)MHz
emilmont 10:3bc89ef62ce7 96 tpm->CONTROLS[ch_n].CnSC = (TPM_CnSC_MSB_MASK | TPM_CnSC_ELSB_MASK); /* No Interrupts; High True pulses on Edge Aligned PWM */
emilmont 10:3bc89ef62ce7 97
emilmont 10:3bc89ef62ce7 98 obj->CnV = &tpm->CONTROLS[ch_n].CnV;
emilmont 10:3bc89ef62ce7 99 obj->MOD = &tpm->MOD;
emilmont 10:3bc89ef62ce7 100 obj->CNT = &tpm->CNT;
emilmont 10:3bc89ef62ce7 101
emilmont 10:3bc89ef62ce7 102 // default to 20ms: standard for servos, and fine for e.g. brightness control
emilmont 10:3bc89ef62ce7 103 pwmout_period_ms(obj, 20);
emilmont 10:3bc89ef62ce7 104 pwmout_write (obj, 0);
emilmont 10:3bc89ef62ce7 105
emilmont 10:3bc89ef62ce7 106 // Wire pinout
emilmont 10:3bc89ef62ce7 107 pinmap_pinout(pin, PinMap_PWM);
emilmont 10:3bc89ef62ce7 108 }
emilmont 10:3bc89ef62ce7 109
emilmont 10:3bc89ef62ce7 110 void pwmout_free(pwmout_t* obj) {}
emilmont 10:3bc89ef62ce7 111
emilmont 10:3bc89ef62ce7 112 void pwmout_write(pwmout_t* obj, float value) {
emilmont 10:3bc89ef62ce7 113 if (value < 0.0) {
emilmont 10:3bc89ef62ce7 114 value = 0.0;
emilmont 10:3bc89ef62ce7 115 } else if (value > 1.0) {
emilmont 10:3bc89ef62ce7 116 value = 1.0;
emilmont 10:3bc89ef62ce7 117 }
emilmont 10:3bc89ef62ce7 118
emilmont 10:3bc89ef62ce7 119 *obj->CnV = (uint32_t)((float)(*obj->MOD) * value);
emilmont 10:3bc89ef62ce7 120 *obj->CNT = 0;
emilmont 10:3bc89ef62ce7 121 }
emilmont 10:3bc89ef62ce7 122
emilmont 10:3bc89ef62ce7 123 float pwmout_read(pwmout_t* obj) {
emilmont 10:3bc89ef62ce7 124 float v = (float)(*obj->CnV) / (float)(*obj->MOD);
emilmont 10:3bc89ef62ce7 125 return (v > 1.0) ? (1.0) : (v);
emilmont 10:3bc89ef62ce7 126 }
emilmont 10:3bc89ef62ce7 127
emilmont 10:3bc89ef62ce7 128 void pwmout_period(pwmout_t* obj, float seconds) {
emilmont 10:3bc89ef62ce7 129 pwmout_period_us(obj, seconds * 1000000.0f);
emilmont 10:3bc89ef62ce7 130 }
emilmont 10:3bc89ef62ce7 131
emilmont 10:3bc89ef62ce7 132 void pwmout_period_ms(pwmout_t* obj, int ms) {
emilmont 10:3bc89ef62ce7 133 pwmout_period_us(obj, ms * 1000);
emilmont 10:3bc89ef62ce7 134 }
emilmont 10:3bc89ef62ce7 135
emilmont 10:3bc89ef62ce7 136 // Set the PWM period, keeping the duty cycle the same.
emilmont 10:3bc89ef62ce7 137 void pwmout_period_us(pwmout_t* obj, int us) {
emilmont 10:3bc89ef62ce7 138 float dc = pwmout_read(obj);
mbed_official 72:248c61396e08 139 *obj->MOD = (uint32_t)(pwm_clock * (float)us);
emilmont 10:3bc89ef62ce7 140 pwmout_write(obj, dc);
emilmont 10:3bc89ef62ce7 141 }
emilmont 10:3bc89ef62ce7 142
emilmont 10:3bc89ef62ce7 143 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
emilmont 10:3bc89ef62ce7 144 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
emilmont 10:3bc89ef62ce7 145 }
emilmont 10:3bc89ef62ce7 146
emilmont 10:3bc89ef62ce7 147 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
emilmont 10:3bc89ef62ce7 148 pwmout_pulsewidth_us(obj, ms * 1000);
emilmont 10:3bc89ef62ce7 149 }
emilmont 10:3bc89ef62ce7 150
emilmont 10:3bc89ef62ce7 151 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 72:248c61396e08 152 *obj->CnV = (uint32_t)(pwm_clock * (float)us);
emilmont 10:3bc89ef62ce7 153 }