Mike Pulice / ublox_C200Test

Integrating the ublox LISA C200 modem

Fork of SprintUSBModemHTTPClientTest by Donatien Garnier

mbed-src/targets/hal/TARGET_NXP/TARGET_LPC176X/us_ticker.c@5:3f93dd1d4cb3, 2013-09-26 (annotated)

Committer:
sam_grove
Date:
Thu Sep 26 00:44:20 2013 -0500
Revision:
5:3f93dd1d4cb3
Exported program and replaced contents of the repo with the source

to build and debug using keil mdk. Libs NOT upto date are lwip, lwip-sys

and socket. these have newer versions under mbed_official but were starting

from a know working point

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sam_grove 5:3f93dd1d4cb3 1 /* mbed Microcontroller Library
sam_grove 5:3f93dd1d4cb3 2 * Copyright (c) 2006-2013 ARM Limited
sam_grove 5:3f93dd1d4cb3 3 *
sam_grove 5:3f93dd1d4cb3 4 * Licensed under the Apache License, Version 2.0 (the "License");
sam_grove 5:3f93dd1d4cb3 5 * you may not use this file except in compliance with the License.
sam_grove 5:3f93dd1d4cb3 6 * You may obtain a copy of the License at
sam_grove 5:3f93dd1d4cb3 7 *
sam_grove 5:3f93dd1d4cb3 8 * http://www.apache.org/licenses/LICENSE-2.0
sam_grove 5:3f93dd1d4cb3 9 *
sam_grove 5:3f93dd1d4cb3 10 * Unless required by applicable law or agreed to in writing, software
sam_grove 5:3f93dd1d4cb3 11 * distributed under the License is distributed on an "AS IS" BASIS,
sam_grove 5:3f93dd1d4cb3 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sam_grove 5:3f93dd1d4cb3 13 * See the License for the specific language governing permissions and
sam_grove 5:3f93dd1d4cb3 14 * limitations under the License.
sam_grove 5:3f93dd1d4cb3 15 */
sam_grove 5:3f93dd1d4cb3 16 #include <stddef.h>
sam_grove 5:3f93dd1d4cb3 17 #include "us_ticker_api.h"
sam_grove 5:3f93dd1d4cb3 18 #include "PeripheralNames.h"
sam_grove 5:3f93dd1d4cb3 19
sam_grove 5:3f93dd1d4cb3 20 #define US_TICKER_TIMER ((LPC_TIM_TypeDef *)LPC_TIM3_BASE)
sam_grove 5:3f93dd1d4cb3 21 #define US_TICKER_TIMER_IRQn TIMER3_IRQn
sam_grove 5:3f93dd1d4cb3 22
sam_grove 5:3f93dd1d4cb3 23 int us_ticker_inited = 0;
sam_grove 5:3f93dd1d4cb3 24
sam_grove 5:3f93dd1d4cb3 25 void us_ticker_init(void) {
sam_grove 5:3f93dd1d4cb3 26 if (us_ticker_inited) return;
sam_grove 5:3f93dd1d4cb3 27 us_ticker_inited = 1;
sam_grove 5:3f93dd1d4cb3 28
sam_grove 5:3f93dd1d4cb3 29 LPC_SC->PCONP |= 1 << 23; // Clock TIMER_3
sam_grove 5:3f93dd1d4cb3 30
sam_grove 5:3f93dd1d4cb3 31 US_TICKER_TIMER->CTCR = 0x0; // timer mode
sam_grove 5:3f93dd1d4cb3 32 uint32_t PCLK = SystemCoreClock / 4;
sam_grove 5:3f93dd1d4cb3 33
sam_grove 5:3f93dd1d4cb3 34 US_TICKER_TIMER->TCR = 0x2; // reset
sam_grove 5:3f93dd1d4cb3 35
sam_grove 5:3f93dd1d4cb3 36 uint32_t prescale = PCLK / 1000000; // default to 1MHz (1 us ticks)
sam_grove 5:3f93dd1d4cb3 37 US_TICKER_TIMER->PR = prescale - 1;
sam_grove 5:3f93dd1d4cb3 38 US_TICKER_TIMER->TCR = 1; // enable = 1, reset = 0
sam_grove 5:3f93dd1d4cb3 39
sam_grove 5:3f93dd1d4cb3 40 NVIC_SetVector(US_TICKER_TIMER_IRQn, (uint32_t)us_ticker_irq_handler);
sam_grove 5:3f93dd1d4cb3 41 NVIC_EnableIRQ(US_TICKER_TIMER_IRQn);
sam_grove 5:3f93dd1d4cb3 42 }
sam_grove 5:3f93dd1d4cb3 43
sam_grove 5:3f93dd1d4cb3 44 uint32_t us_ticker_read() {
sam_grove 5:3f93dd1d4cb3 45 if (!us_ticker_inited)
sam_grove 5:3f93dd1d4cb3 46 us_ticker_init();
sam_grove 5:3f93dd1d4cb3 47
sam_grove 5:3f93dd1d4cb3 48 return US_TICKER_TIMER->TC;
sam_grove 5:3f93dd1d4cb3 49 }
sam_grove 5:3f93dd1d4cb3 50
sam_grove 5:3f93dd1d4cb3 51 void us_ticker_set_interrupt(unsigned int timestamp) {
sam_grove 5:3f93dd1d4cb3 52 // set match value
sam_grove 5:3f93dd1d4cb3 53 US_TICKER_TIMER->MR0 = timestamp;
sam_grove 5:3f93dd1d4cb3 54 // enable match interrupt
sam_grove 5:3f93dd1d4cb3 55 US_TICKER_TIMER->MCR |= 1;
sam_grove 5:3f93dd1d4cb3 56 }
sam_grove 5:3f93dd1d4cb3 57
sam_grove 5:3f93dd1d4cb3 58 void us_ticker_disable_interrupt(void) {
sam_grove 5:3f93dd1d4cb3 59 US_TICKER_TIMER->MCR &= ~1;
sam_grove 5:3f93dd1d4cb3 60 }
sam_grove 5:3f93dd1d4cb3 61
sam_grove 5:3f93dd1d4cb3 62 void us_ticker_clear_interrupt(void) {
sam_grove 5:3f93dd1d4cb3 63 US_TICKER_TIMER->IR = 1;
sam_grove 5:3f93dd1d4cb3 64 }