takashi kadono / Mbed OS Nucleo446_SSD1331

Color Oled(SSD1331) connect to STMicroelectronics Nucleo-F466

Dependencies:   ssd1331

mbed-os/targets/TARGET_Atmel/TARGET_SAM_CortexM0P/us_ticker.c@0:8fdf9a60065b, 2018-10-10 (annotated)

Committer:
kadonotakashi
Date:
Wed Oct 10 00:33:53 2018 +0000
Revision:
0:8fdf9a60065b
how to make mbed librry

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kadonotakashi 0:8fdf9a60065b 1 /* mbed Microcontroller Library
kadonotakashi 0:8fdf9a60065b 2 * Copyright (c) 2006-2015 ARM Limited
kadonotakashi 0:8fdf9a60065b 3 *
kadonotakashi 0:8fdf9a60065b 4 * Licensed under the Apache License, Version 2.0 (the "License");
kadonotakashi 0:8fdf9a60065b 5 * you may not use this file except in compliance with the License.
kadonotakashi 0:8fdf9a60065b 6 * You may obtain a copy of the License at
kadonotakashi 0:8fdf9a60065b 7 *
kadonotakashi 0:8fdf9a60065b 8 * http://www.apache.org/licenses/LICENSE-2.0
kadonotakashi 0:8fdf9a60065b 9 *
kadonotakashi 0:8fdf9a60065b 10 * Unless required by applicable law or agreed to in writing, software
kadonotakashi 0:8fdf9a60065b 11 * distributed under the License is distributed on an "AS IS" BASIS,
kadonotakashi 0:8fdf9a60065b 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kadonotakashi 0:8fdf9a60065b 13 * See the License for the specific language governing permissions and
kadonotakashi 0:8fdf9a60065b 14 * limitations under the License.
kadonotakashi 0:8fdf9a60065b 15 */
kadonotakashi 0:8fdf9a60065b 16 #include <stddef.h>
kadonotakashi 0:8fdf9a60065b 17 #include "us_ticker_api.h"
kadonotakashi 0:8fdf9a60065b 18 #include "cmsis.h"
kadonotakashi 0:8fdf9a60065b 19 #include "mbed_assert.h"
kadonotakashi 0:8fdf9a60065b 20 #include "ins_gclk.h"
kadonotakashi 0:8fdf9a60065b 21 #include "compiler.h"
kadonotakashi 0:8fdf9a60065b 22 #include "system.h"
kadonotakashi 0:8fdf9a60065b 23 #include "tc.h"
kadonotakashi 0:8fdf9a60065b 24 #include "tc_interrupt.h"
kadonotakashi 0:8fdf9a60065b 25
kadonotakashi 0:8fdf9a60065b 26 #if (SAMD21) || (SAMR21)
kadonotakashi 0:8fdf9a60065b 27 #define TICKER_COUNTER_uS TC4
kadonotakashi 0:8fdf9a60065b 28 #define TICKER_COUNTER_IRQn TC4_IRQn
kadonotakashi 0:8fdf9a60065b 29 #define TICKER_COUNTER_Handlr TC4_Handler
kadonotakashi 0:8fdf9a60065b 30 #elif (SAML21) /*SAML21 TCC4 does not support 32 bit counter operations*/
kadonotakashi 0:8fdf9a60065b 31 #define TICKER_COUNTER_uS TC0
kadonotakashi 0:8fdf9a60065b 32 #define TICKER_COUNTER_IRQn TC0_IRQn
kadonotakashi 0:8fdf9a60065b 33 #define TICKER_COUNTER_Handlr TC0_Handler
kadonotakashi 0:8fdf9a60065b 34 #endif
kadonotakashi 0:8fdf9a60065b 35
kadonotakashi 0:8fdf9a60065b 36 static int us_ticker_inited = 0;
kadonotakashi 0:8fdf9a60065b 37 extern uint8_t g_sys_init;
kadonotakashi 0:8fdf9a60065b 38
kadonotakashi 0:8fdf9a60065b 39 struct tc_module us_ticker_module;
kadonotakashi 0:8fdf9a60065b 40
kadonotakashi 0:8fdf9a60065b 41
kadonotakashi 0:8fdf9a60065b 42 static inline void tc_clear_interrupt(
kadonotakashi 0:8fdf9a60065b 43 struct tc_module *const module,
kadonotakashi 0:8fdf9a60065b 44 const enum tc_callback callback_type)
kadonotakashi 0:8fdf9a60065b 45 {
kadonotakashi 0:8fdf9a60065b 46 /* Sanity check arguments */
kadonotakashi 0:8fdf9a60065b 47 MBED_ASSERT(module);
kadonotakashi 0:8fdf9a60065b 48
kadonotakashi 0:8fdf9a60065b 49 /* Clear interrupt flags */
kadonotakashi 0:8fdf9a60065b 50 if (callback_type == TC_CALLBACK_CC_CHANNEL0) {
kadonotakashi 0:8fdf9a60065b 51 module->hw->COUNT8.INTENCLR.reg = TC_INTFLAG_MC(1);
kadonotakashi 0:8fdf9a60065b 52 } else if (callback_type == TC_CALLBACK_CC_CHANNEL1) {
kadonotakashi 0:8fdf9a60065b 53 module->hw->COUNT8.INTENCLR.reg = TC_INTFLAG_MC(2);
kadonotakashi 0:8fdf9a60065b 54 } else {
kadonotakashi 0:8fdf9a60065b 55 module->hw->COUNT8.INTENCLR.reg = (1 << callback_type);
kadonotakashi 0:8fdf9a60065b 56 }
kadonotakashi 0:8fdf9a60065b 57 }
kadonotakashi 0:8fdf9a60065b 58
kadonotakashi 0:8fdf9a60065b 59 void us_ticker_irq_handler_internal(struct tc_module* us_tc_module)
kadonotakashi 0:8fdf9a60065b 60 {
kadonotakashi 0:8fdf9a60065b 61 uint32_t status_flags;
kadonotakashi 0:8fdf9a60065b 62
kadonotakashi 0:8fdf9a60065b 63 /* Clear TC capture overflow and TC count overflow */
kadonotakashi 0:8fdf9a60065b 64 status_flags = TC_STATUS_CAPTURE_OVERFLOW | TC_STATUS_COUNT_OVERFLOW;
kadonotakashi 0:8fdf9a60065b 65 tc_clear_status(&us_ticker_module, status_flags);
kadonotakashi 0:8fdf9a60065b 66
kadonotakashi 0:8fdf9a60065b 67 us_ticker_irq_handler();
kadonotakashi 0:8fdf9a60065b 68 }
kadonotakashi 0:8fdf9a60065b 69
kadonotakashi 0:8fdf9a60065b 70 void us_ticker_init(void)
kadonotakashi 0:8fdf9a60065b 71 {
kadonotakashi 0:8fdf9a60065b 72 uint32_t cycles_per_us;
kadonotakashi 0:8fdf9a60065b 73 uint32_t prescaler = 0;
kadonotakashi 0:8fdf9a60065b 74 struct tc_config config_tc;
kadonotakashi 0:8fdf9a60065b 75
kadonotakashi 0:8fdf9a60065b 76 if (us_ticker_inited) return;
kadonotakashi 0:8fdf9a60065b 77 us_ticker_inited = 1;
kadonotakashi 0:8fdf9a60065b 78
kadonotakashi 0:8fdf9a60065b 79 if (g_sys_init == 0) {
kadonotakashi 0:8fdf9a60065b 80 system_init();
kadonotakashi 0:8fdf9a60065b 81 g_sys_init = 1;
kadonotakashi 0:8fdf9a60065b 82 }
kadonotakashi 0:8fdf9a60065b 83
kadonotakashi 0:8fdf9a60065b 84 tc_get_config_defaults(&config_tc);
kadonotakashi 0:8fdf9a60065b 85
kadonotakashi 0:8fdf9a60065b 86 cycles_per_us = system_gclk_gen_get_hz(config_tc.clock_source) / 1000000;
kadonotakashi 0:8fdf9a60065b 87 MBED_ASSERT(cycles_per_us > 0);
kadonotakashi 0:8fdf9a60065b 88 /*while((cycles_per_us & 1) == 0 && prescaler <= 10) {
kadonotakashi 0:8fdf9a60065b 89 cycles_per_us = cycles_per_us >> 1;
kadonotakashi 0:8fdf9a60065b 90 prescaler++;
kadonotakashi 0:8fdf9a60065b 91 }*/
kadonotakashi 0:8fdf9a60065b 92 while((cycles_per_us > 1) && (prescaler <= 10)) {
kadonotakashi 0:8fdf9a60065b 93 cycles_per_us = cycles_per_us >> 1;
kadonotakashi 0:8fdf9a60065b 94 prescaler++;
kadonotakashi 0:8fdf9a60065b 95 }
kadonotakashi 0:8fdf9a60065b 96 if (prescaler >= 9) {
kadonotakashi 0:8fdf9a60065b 97 prescaler = 7;
kadonotakashi 0:8fdf9a60065b 98 } else if (prescaler >= 7) {
kadonotakashi 0:8fdf9a60065b 99 prescaler = 6;
kadonotakashi 0:8fdf9a60065b 100 } else if (prescaler >= 5) {
kadonotakashi 0:8fdf9a60065b 101 prescaler = 5;
kadonotakashi 0:8fdf9a60065b 102 }
kadonotakashi 0:8fdf9a60065b 103
kadonotakashi 0:8fdf9a60065b 104 config_tc.clock_prescaler = (enum tc_clock_prescaler)TC_CTRLA_PRESCALER(prescaler);
kadonotakashi 0:8fdf9a60065b 105 config_tc.counter_size = TC_COUNTER_SIZE_32BIT;
kadonotakashi 0:8fdf9a60065b 106 config_tc.run_in_standby = true;
kadonotakashi 0:8fdf9a60065b 107 config_tc.counter_32_bit.value = 0;
kadonotakashi 0:8fdf9a60065b 108 config_tc.counter_32_bit.compare_capture_channel[TC_COMPARE_CAPTURE_CHANNEL_0] = 0xFFFFFFFF;
kadonotakashi 0:8fdf9a60065b 109
kadonotakashi 0:8fdf9a60065b 110 /* Initialize the timer */
kadonotakashi 0:8fdf9a60065b 111 tc_init(&us_ticker_module, TICKER_COUNTER_uS, &config_tc);
kadonotakashi 0:8fdf9a60065b 112
kadonotakashi 0:8fdf9a60065b 113 /* Register callback function */
kadonotakashi 0:8fdf9a60065b 114 tc_register_callback(&us_ticker_module, (tc_callback_t)us_ticker_irq_handler_internal, TC_CALLBACK_CC_CHANNEL0);
kadonotakashi 0:8fdf9a60065b 115
kadonotakashi 0:8fdf9a60065b 116 /* Enable the timer module */
kadonotakashi 0:8fdf9a60065b 117 tc_enable(&us_ticker_module);
kadonotakashi 0:8fdf9a60065b 118 }
kadonotakashi 0:8fdf9a60065b 119
kadonotakashi 0:8fdf9a60065b 120 uint32_t us_ticker_read()
kadonotakashi 0:8fdf9a60065b 121 {
kadonotakashi 0:8fdf9a60065b 122 if (!us_ticker_inited)
kadonotakashi 0:8fdf9a60065b 123 us_ticker_init();
kadonotakashi 0:8fdf9a60065b 124
kadonotakashi 0:8fdf9a60065b 125 return tc_get_count_value(&us_ticker_module);
kadonotakashi 0:8fdf9a60065b 126 }
kadonotakashi 0:8fdf9a60065b 127
kadonotakashi 0:8fdf9a60065b 128 void us_ticker_set_interrupt(timestamp_t timestamp)
kadonotakashi 0:8fdf9a60065b 129 {
kadonotakashi 0:8fdf9a60065b 130 uint32_t cur_time;
kadonotakashi 0:8fdf9a60065b 131 int32_t delta;
kadonotakashi 0:8fdf9a60065b 132
kadonotakashi 0:8fdf9a60065b 133 cur_time = us_ticker_read();
kadonotakashi 0:8fdf9a60065b 134 delta = (int32_t)((uint32_t)timestamp - cur_time);
kadonotakashi 0:8fdf9a60065b 135 if (delta < 0) {
kadonotakashi 0:8fdf9a60065b 136 /* Event already occurred in past */
kadonotakashi 0:8fdf9a60065b 137 us_ticker_irq_handler();
kadonotakashi 0:8fdf9a60065b 138 return;
kadonotakashi 0:8fdf9a60065b 139 }
kadonotakashi 0:8fdf9a60065b 140
kadonotakashi 0:8fdf9a60065b 141 NVIC_DisableIRQ(TICKER_COUNTER_IRQn);
kadonotakashi 0:8fdf9a60065b 142 NVIC_SetVector(TICKER_COUNTER_IRQn, (uint32_t)TICKER_COUNTER_Handlr);
kadonotakashi 0:8fdf9a60065b 143
kadonotakashi 0:8fdf9a60065b 144 /* Enable the callback */
kadonotakashi 0:8fdf9a60065b 145 tc_enable_callback(&us_ticker_module, TC_CALLBACK_CC_CHANNEL0);
kadonotakashi 0:8fdf9a60065b 146 tc_set_compare_value(&us_ticker_module, TC_COMPARE_CAPTURE_CHANNEL_0, (uint32_t)timestamp);
kadonotakashi 0:8fdf9a60065b 147
kadonotakashi 0:8fdf9a60065b 148 NVIC_EnableIRQ(TICKER_COUNTER_IRQn);
kadonotakashi 0:8fdf9a60065b 149 }
kadonotakashi 0:8fdf9a60065b 150
kadonotakashi 0:8fdf9a60065b 151 void us_ticker_disable_interrupt(void)
kadonotakashi 0:8fdf9a60065b 152 {
kadonotakashi 0:8fdf9a60065b 153 /* Disable the callback */
kadonotakashi 0:8fdf9a60065b 154 tc_disable_callback(&us_ticker_module, TC_CALLBACK_CC_CHANNEL0);
kadonotakashi 0:8fdf9a60065b 155 NVIC_DisableIRQ(TICKER_COUNTER_IRQn);
kadonotakashi 0:8fdf9a60065b 156 }
kadonotakashi 0:8fdf9a60065b 157
kadonotakashi 0:8fdf9a60065b 158 void us_ticker_clear_interrupt(void)
kadonotakashi 0:8fdf9a60065b 159 {
kadonotakashi 0:8fdf9a60065b 160 uint32_t status_flags;
kadonotakashi 0:8fdf9a60065b 161
kadonotakashi 0:8fdf9a60065b 162 /* Clear TC channel 0 match */
kadonotakashi 0:8fdf9a60065b 163 status_flags = TC_STATUS_CHANNEL_0_MATCH;
kadonotakashi 0:8fdf9a60065b 164 tc_clear_status(&us_ticker_module, status_flags);
kadonotakashi 0:8fdf9a60065b 165
kadonotakashi 0:8fdf9a60065b 166 /* Clear the interrupt */
kadonotakashi 0:8fdf9a60065b 167 tc_clear_interrupt(&us_ticker_module, TC_CALLBACK_CC_CHANNEL0);
kadonotakashi 0:8fdf9a60065b 168 NVIC_ClearPendingIRQ(TICKER_COUNTER_IRQn);
kadonotakashi 0:8fdf9a60065b 169 }
kadonotakashi 0:8fdf9a60065b 170
kadonotakashi 0:8fdf9a60065b 171 void us_ticker_free(void)
kadonotakashi 0:8fdf9a60065b 172 {
kadonotakashi 0:8fdf9a60065b 173
kadonotakashi 0:8fdf9a60065b 174 }