Arrow / Mbed OS DAPLink Reset

Repostiory containing DAPLink source code with Reset Pin workaround for HANI_IOT board.

Upstream: https://github.com/ARMmbed/DAPLink

source/hic_hal/freescale/kl26z/gpio.c@0:01f31e923fe2, 2020-04-07 (annotated)

Committer:
Pawel Zarembski
Date:
Tue Apr 07 12:55:42 2020 +0200
Revision:
0:01f31e923fe2
hani: DAPLink with reset workaround

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Pawel Zarembski 0:01f31e923fe2 1 /**
Pawel Zarembski 0:01f31e923fe2 2 * @file gpio.c
Pawel Zarembski 0:01f31e923fe2 3 * @brief
Pawel Zarembski 0:01f31e923fe2 4 *
Pawel Zarembski 0:01f31e923fe2 5 * DAPLink Interface Firmware
Pawel Zarembski 0:01f31e923fe2 6 * Copyright (c) 2009-2016, ARM Limited, All Rights Reserved
Pawel Zarembski 0:01f31e923fe2 7 * SPDX-License-Identifier: Apache-2.0
Pawel Zarembski 0:01f31e923fe2 8 *
Pawel Zarembski 0:01f31e923fe2 9 * Licensed under the Apache License, Version 2.0 (the "License"); you may
Pawel Zarembski 0:01f31e923fe2 10 * not use this file except in compliance with the License.
Pawel Zarembski 0:01f31e923fe2 11 * You may obtain a copy of the License at
Pawel Zarembski 0:01f31e923fe2 12 *
Pawel Zarembski 0:01f31e923fe2 13 * http://www.apache.org/licenses/LICENSE-2.0
Pawel Zarembski 0:01f31e923fe2 14 *
Pawel Zarembski 0:01f31e923fe2 15 * Unless required by applicable law or agreed to in writing, software
Pawel Zarembski 0:01f31e923fe2 16 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
Pawel Zarembski 0:01f31e923fe2 17 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Pawel Zarembski 0:01f31e923fe2 18 * See the License for the specific language governing permissions and
Pawel Zarembski 0:01f31e923fe2 19 * limitations under the License.
Pawel Zarembski 0:01f31e923fe2 20 */
Pawel Zarembski 0:01f31e923fe2 21
Pawel Zarembski 0:01f31e923fe2 22 #include "gpio.h"
Pawel Zarembski 0:01f31e923fe2 23
Pawel Zarembski 0:01f31e923fe2 24 static void busy_wait(uint32_t cycles)
Pawel Zarembski 0:01f31e923fe2 25 {
Pawel Zarembski 0:01f31e923fe2 26 volatile uint32_t i;
Pawel Zarembski 0:01f31e923fe2 27 i = cycles;
Pawel Zarembski 0:01f31e923fe2 28
Pawel Zarembski 0:01f31e923fe2 29 while (i > 0) {
Pawel Zarembski 0:01f31e923fe2 30 i--;
Pawel Zarembski 0:01f31e923fe2 31 }
Pawel Zarembski 0:01f31e923fe2 32 }
Pawel Zarembski 0:01f31e923fe2 33
Pawel Zarembski 0:01f31e923fe2 34 void gpio_init(void)
Pawel Zarembski 0:01f31e923fe2 35 {
Pawel Zarembski 0:01f31e923fe2 36 SIM->SCGC5 |= SIM_SCGC5_PORTA_MASK | SIM_SCGC5_PORTB_MASK | SIM_SCGC5_PORTC_MASK | SIM_SCGC5_PORTD_MASK | SIM_SCGC5_PORTE_MASK;
Pawel Zarembski 0:01f31e923fe2 37 // configure pin as GPIO
Pawel Zarembski 0:01f31e923fe2 38 PIN_HID_LED_PORT->PCR[PIN_HID_LED_BIT] = PORT_PCR_MUX(1);
Pawel Zarembski 0:01f31e923fe2 39 PIN_MSC_LED_PORT->PCR[PIN_MSC_LED_BIT] = PORT_PCR_MUX(1);
Pawel Zarembski 0:01f31e923fe2 40 PIN_CDC_LED_PORT->PCR[PIN_CDC_LED_BIT] = PORT_PCR_MUX(1);
Pawel Zarembski 0:01f31e923fe2 41 PIN_SW_RESET_PORT->PCR[PIN_SW_RESET_BIT] = PORT_PCR_MUX(1);
Pawel Zarembski 0:01f31e923fe2 42 PIN_POWER_EN_PORT->PCR[PIN_POWER_EN_BIT] = PORT_PCR_MUX(1);
Pawel Zarembski 0:01f31e923fe2 43 // led off
Pawel Zarembski 0:01f31e923fe2 44 gpio_set_hid_led(GPIO_LED_OFF);
Pawel Zarembski 0:01f31e923fe2 45 gpio_set_cdc_led(GPIO_LED_OFF);
Pawel Zarembski 0:01f31e923fe2 46 gpio_set_msc_led(GPIO_LED_OFF);
Pawel Zarembski 0:01f31e923fe2 47 // power regulator on
Pawel Zarembski 0:01f31e923fe2 48 PIN_POWER_EN_GPIO->PDOR |= PIN_POWER_EN;
Pawel Zarembski 0:01f31e923fe2 49 // set as output
Pawel Zarembski 0:01f31e923fe2 50 PIN_HID_LED_GPIO->PDDR |= PIN_HID_LED;
Pawel Zarembski 0:01f31e923fe2 51 PIN_MSC_LED_GPIO->PDDR |= PIN_MSC_LED;
Pawel Zarembski 0:01f31e923fe2 52 PIN_CDC_LED_GPIO->PDDR |= PIN_CDC_LED;
Pawel Zarembski 0:01f31e923fe2 53 PIN_POWER_EN_GPIO->PDDR |= PIN_POWER_EN;
Pawel Zarembski 0:01f31e923fe2 54 // set as input
Pawel Zarembski 0:01f31e923fe2 55 PIN_SW_RESET_GPIO->PDDR &= ~PIN_SW_RESET;
Pawel Zarembski 0:01f31e923fe2 56
Pawel Zarembski 0:01f31e923fe2 57 // Let the voltage rails stabilize. This is especailly important
Pawel Zarembski 0:01f31e923fe2 58 // during software resets, since the target's 3.3v rail can take
Pawel Zarembski 0:01f31e923fe2 59 // 20-50ms to drain. During this time the target could be driving
Pawel Zarembski 0:01f31e923fe2 60 // the reset pin low, causing the bootloader to think the reset
Pawel Zarembski 0:01f31e923fe2 61 // button is pressed.
Pawel Zarembski 0:01f31e923fe2 62 // Note: With optimization set to -O2 the value 1000000 delays for ~85ms
Pawel Zarembski 0:01f31e923fe2 63 busy_wait(1000000);
Pawel Zarembski 0:01f31e923fe2 64 }
Pawel Zarembski 0:01f31e923fe2 65
Pawel Zarembski 0:01f31e923fe2 66 void gpio_set_hid_led(gpio_led_state_t state)
Pawel Zarembski 0:01f31e923fe2 67 {
Pawel Zarembski 0:01f31e923fe2 68 (GPIO_LED_ON == state) ? (PIN_HID_LED_GPIO->PCOR = PIN_HID_LED) : (PIN_HID_LED_GPIO->PSOR = PIN_HID_LED);
Pawel Zarembski 0:01f31e923fe2 69 }
Pawel Zarembski 0:01f31e923fe2 70
Pawel Zarembski 0:01f31e923fe2 71 void gpio_set_cdc_led(gpio_led_state_t state)
Pawel Zarembski 0:01f31e923fe2 72 {
Pawel Zarembski 0:01f31e923fe2 73 (GPIO_LED_ON == state) ? (PIN_CDC_LED_GPIO->PCOR = PIN_CDC_LED) : (PIN_CDC_LED_GPIO->PSOR = PIN_CDC_LED);
Pawel Zarembski 0:01f31e923fe2 74 }
Pawel Zarembski 0:01f31e923fe2 75
Pawel Zarembski 0:01f31e923fe2 76 void gpio_set_msc_led(gpio_led_state_t state)
Pawel Zarembski 0:01f31e923fe2 77 {
Pawel Zarembski 0:01f31e923fe2 78 (GPIO_LED_ON == state) ? (PIN_MSC_LED_GPIO->PCOR = PIN_MSC_LED) : (PIN_MSC_LED_GPIO->PSOR = PIN_MSC_LED);
Pawel Zarembski 0:01f31e923fe2 79 }
Pawel Zarembski 0:01f31e923fe2 80
Pawel Zarembski 0:01f31e923fe2 81 uint8_t gpio_get_reset_btn_no_fwrd(void)
Pawel Zarembski 0:01f31e923fe2 82 {
Pawel Zarembski 0:01f31e923fe2 83 return 0;
Pawel Zarembski 0:01f31e923fe2 84 }
Pawel Zarembski 0:01f31e923fe2 85
Pawel Zarembski 0:01f31e923fe2 86 uint8_t gpio_get_reset_btn_fwrd(void)
Pawel Zarembski 0:01f31e923fe2 87 {
Pawel Zarembski 0:01f31e923fe2 88 return (PIN_SW_RESET_GPIO->PDIR & PIN_SW_RESET) ? 0 : 1;
Pawel Zarembski 0:01f31e923fe2 89 }
Pawel Zarembski 0:01f31e923fe2 90
Pawel Zarembski 0:01f31e923fe2 91 void gpio_set_board_power(bool powerEnabled)
Pawel Zarembski 0:01f31e923fe2 92 {
Pawel Zarembski 0:01f31e923fe2 93 }