Norimasa Okamoto / Mbed 2 deprecated lpc800-max-RGB

LPC800-MAX RGB demo using SCT and MRT

LPC800-MAX RGB demo using State-Configurable Timer(SCT) and Multi-Rate Timer(MRT).
http://www.youtube.com/watch?v=PABxoWZB0YM

MRT.cpp@1:4e19f154ec21, 2013-10-14 (annotated)

Committer:
va009039
Date:
Mon Oct 14 03:59:30 2013 +0000
Revision:
1:4e19f154ec21
first commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
va009039 1:4e19f154ec21 1 #include "MRT.h"
va009039 1:4e19f154ec21 2
va009039 1:4e19f154ec21 3 MRT::MRT(int channel)
va009039 1:4e19f154ec21 4 {
va009039 1:4e19f154ec21 5 static bool insted = false;
va009039 1:4e19f154ec21 6
va009039 1:4e19f154ec21 7 if (!insted) {
va009039 1:4e19f154ec21 8 inst();
va009039 1:4e19f154ec21 9 insted = true;
va009039 1:4e19f154ec21 10 }
va009039 1:4e19f154ec21 11
va009039 1:4e19f154ec21 12 _ch = &LPC_MRT->Channel[channel];
va009039 1:4e19f154ec21 13 _ch->CTRL |= (1<<1); // one-shot
va009039 1:4e19f154ec21 14 }
va009039 1:4e19f154ec21 15
va009039 1:4e19f154ec21 16 void MRT::inst()
va009039 1:4e19f154ec21 17 {
va009039 1:4e19f154ec21 18 LPC_SYSCON->SYSAHBCLKCTRL |= (1<<10); // enable MRT
va009039 1:4e19f154ec21 19 LPC_SYSCON->PRESETCTRL |= (1<<7); // reset MRT
va009039 1:4e19f154ec21 20 us_clk = SystemCoreClock / 1000000;
va009039 1:4e19f154ec21 21 }
va009039 1:4e19f154ec21 22
va009039 1:4e19f154ec21 23 void MRT::write(uint32_t interval)
va009039 1:4e19f154ec21 24 {
va009039 1:4e19f154ec21 25 _ch->INTVAL = interval | (1<<31); // and LOAD
va009039 1:4e19f154ec21 26 _ch->STAT |= 0x01;
va009039 1:4e19f154ec21 27 }
va009039 1:4e19f154ec21 28
va009039 1:4e19f154ec21 29 int MRT::status()
va009039 1:4e19f154ec21 30 {
va009039 1:4e19f154ec21 31 return (_ch->STAT & 1) ? IDLE : RUNNING;
va009039 1:4e19f154ec21 32 }
va009039 1:4e19f154ec21 33
va009039 1:4e19f154ec21 34 void MRT::wait_ms(uint32_t timeout_ms)
va009039 1:4e19f154ec21 35 {
va009039 1:4e19f154ec21 36 wait_raw(us_clk * 1000 * timeout_ms);
va009039 1:4e19f154ec21 37 }
va009039 1:4e19f154ec21 38
va009039 1:4e19f154ec21 39 void MRT::wait_us(uint32_t timeout_us)
va009039 1:4e19f154ec21 40 {
va009039 1:4e19f154ec21 41 wait_raw(us_clk * timeout_us);
va009039 1:4e19f154ec21 42 }
va009039 1:4e19f154ec21 43
va009039 1:4e19f154ec21 44 void MRT::wait_raw(uint32_t timeout)
va009039 1:4e19f154ec21 45 {
va009039 1:4e19f154ec21 46 write(timeout);
va009039 1:4e19f154ec21 47 while(status() == RUNNING);
va009039 1:4e19f154ec21 48 }
va009039 1:4e19f154ec21 49
va009039 1:4e19f154ec21 50 uint32_t MRT::read()
va009039 1:4e19f154ec21 51 {
va009039 1:4e19f154ec21 52 return _ch->TIMER;
va009039 1:4e19f154ec21 53 }