Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_ARM_SSG/TARGET_IOTSS/SDK/fpga.c@80:bdf1132a57cf, 2016-03-02 (annotated)

Committer:
mbed_official
Date:
Wed Mar 02 14:30:11 2016 +0000
Revision:
80:bdf1132a57cf
Synchronized with git revision de3b14ec9234d586b155fd24badc22775489a3dc



Full URL: https://github.com/mbedmicro/mbed/commit/de3b14ec9234d586b155fd24badc22775489a3dc/



latest changes to add arduino support, plus fixes for IOTSS BEID

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 80:bdf1132a57cf 1 /* mbed Microcontroller Library
mbed_official 80:bdf1132a57cf 2 * Copyright (c) 2006-2015 ARM Limited
mbed_official 80:bdf1132a57cf 3 *
mbed_official 80:bdf1132a57cf 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 80:bdf1132a57cf 5 * you may not use this file except in compliance with the License.
mbed_official 80:bdf1132a57cf 6 * You may obtain a copy of the License at
mbed_official 80:bdf1132a57cf 7 *
mbed_official 80:bdf1132a57cf 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 80:bdf1132a57cf 9 *
mbed_official 80:bdf1132a57cf 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 80:bdf1132a57cf 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 80:bdf1132a57cf 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 80:bdf1132a57cf 13 * See the License for the specific language governing permissions and
mbed_official 80:bdf1132a57cf 14 * limitations under the License.
mbed_official 80:bdf1132a57cf 15 * ----------------------------------------------------------------
mbed_official 80:bdf1132a57cf 16 * File: fpga.c
mbed_official 80:bdf1132a57cf 17 * Release: Version 1.0
mbed_official 80:bdf1132a57cf 18 * ----------------------------------------------------------------
mbed_official 80:bdf1132a57cf 19 */
mbed_official 80:bdf1132a57cf 20
mbed_official 80:bdf1132a57cf 21 /*
mbed_official 80:bdf1132a57cf 22 * Code implementation file for the fpga functions.
mbed_official 80:bdf1132a57cf 23 */
mbed_official 80:bdf1132a57cf 24
mbed_official 80:bdf1132a57cf 25 #include "SMM_MPS2.h" // MPS2 common header
mbed_official 80:bdf1132a57cf 26
mbed_official 80:bdf1132a57cf 27 // Function to delay n*ticks (25MHz = 40nS per tick)
mbed_official 80:bdf1132a57cf 28 // Used for I2C drivers
mbed_official 80:bdf1132a57cf 29 void i2c_delay(unsigned int tick)
mbed_official 80:bdf1132a57cf 30 {
mbed_official 80:bdf1132a57cf 31 unsigned int end;
mbed_official 80:bdf1132a57cf 32 unsigned int start;
mbed_official 80:bdf1132a57cf 33
mbed_official 80:bdf1132a57cf 34 start = MPS2_FPGAIO->COUNTER;
mbed_official 80:bdf1132a57cf 35 end = start + (tick);
mbed_official 80:bdf1132a57cf 36
mbed_official 80:bdf1132a57cf 37 if(end >= start)
mbed_official 80:bdf1132a57cf 38 {
mbed_official 80:bdf1132a57cf 39 while (MPS2_FPGAIO->COUNTER >= start && MPS2_FPGAIO->COUNTER < end);
mbed_official 80:bdf1132a57cf 40 }
mbed_official 80:bdf1132a57cf 41 else
mbed_official 80:bdf1132a57cf 42 {
mbed_official 80:bdf1132a57cf 43 while (MPS2_FPGAIO->COUNTER >= start);
mbed_official 80:bdf1132a57cf 44 while (MPS2_FPGAIO->COUNTER < end);
mbed_official 80:bdf1132a57cf 45 }
mbed_official 80:bdf1132a57cf 46 }
mbed_official 80:bdf1132a57cf 47
mbed_official 80:bdf1132a57cf 48 /* Sleep function to delay n*mS
mbed_official 80:bdf1132a57cf 49 * Uses FPGA counter.
mbed_official 80:bdf1132a57cf 50 */
mbed_official 80:bdf1132a57cf 51 void Sleepms(unsigned int msec)
mbed_official 80:bdf1132a57cf 52 {
mbed_official 80:bdf1132a57cf 53 unsigned int end;
mbed_official 80:bdf1132a57cf 54 unsigned int start;
mbed_official 80:bdf1132a57cf 55
mbed_official 80:bdf1132a57cf 56 start = MPS2_FPGAIO->COUNTER;
mbed_official 80:bdf1132a57cf 57 end = start + (25 * msec * 1000);
mbed_official 80:bdf1132a57cf 58
mbed_official 80:bdf1132a57cf 59 if(end >= start)
mbed_official 80:bdf1132a57cf 60 {
mbed_official 80:bdf1132a57cf 61 while (MPS2_FPGAIO->COUNTER >= start && MPS2_FPGAIO->COUNTER < end);
mbed_official 80:bdf1132a57cf 62 }
mbed_official 80:bdf1132a57cf 63 else
mbed_official 80:bdf1132a57cf 64 {
mbed_official 80:bdf1132a57cf 65 while (MPS2_FPGAIO->COUNTER >= start);
mbed_official 80:bdf1132a57cf 66 while (MPS2_FPGAIO->COUNTER < end);
mbed_official 80:bdf1132a57cf 67 }
mbed_official 80:bdf1132a57cf 68 }
mbed_official 80:bdf1132a57cf 69
mbed_official 80:bdf1132a57cf 70 /* Sleep function to delay n*uS
mbed_official 80:bdf1132a57cf 71 */
mbed_official 80:bdf1132a57cf 72 void Sleepus(unsigned int usec)
mbed_official 80:bdf1132a57cf 73 {
mbed_official 80:bdf1132a57cf 74 unsigned int end;
mbed_official 80:bdf1132a57cf 75 unsigned int start;
mbed_official 80:bdf1132a57cf 76
mbed_official 80:bdf1132a57cf 77 start = MPS2_FPGAIO->COUNTER;
mbed_official 80:bdf1132a57cf 78 end = start + (25 * usec);
mbed_official 80:bdf1132a57cf 79
mbed_official 80:bdf1132a57cf 80 if(end >= start)
mbed_official 80:bdf1132a57cf 81 {
mbed_official 80:bdf1132a57cf 82 while (MPS2_FPGAIO->COUNTER >= start && MPS2_FPGAIO->COUNTER < end);
mbed_official 80:bdf1132a57cf 83 }
mbed_official 80:bdf1132a57cf 84 else
mbed_official 80:bdf1132a57cf 85 {
mbed_official 80:bdf1132a57cf 86 while (MPS2_FPGAIO->COUNTER >= start);
mbed_official 80:bdf1132a57cf 87 while (MPS2_FPGAIO->COUNTER < end);
mbed_official 80:bdf1132a57cf 88 }
mbed_official 80:bdf1132a57cf 89 }
mbed_official 80:bdf1132a57cf 90