Kevin Jones / Mbed 2 deprecated MIDISynthwithSpecAnalyzer

A synthesizer that is controlled by a USB MIDI Keyboard. Also displays corresponding frequencies via a simple spectrum analyzer on a LCD. Uses a watchdog timer to reset Mbed in case it freezes.

Dependencies:   4DGL-uLCD-SE USBHostMIDI mbed

Fork of USBHostMIDI_example by Kaoru Shoji

Watchdog.h@2:5366ce17fe55, 2017-12-13 (annotated)

Committer:
kjones99
Date:
Wed Dec 13 03:31:09 2017 +0000
Revision:
2:5366ce17fe55
Final version as of right now.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kjones99 2:5366ce17fe55 1 #include "mbed.h"
kjones99 2:5366ce17fe55 2 // LEDs used to indicate code activity and reset source
kjones99 2:5366ce17fe55 3 DigitalOut myled1(LED1); //in main loop part 1
kjones99 2:5366ce17fe55 4 DigitalOut myled2(LED2); //in main loop part 2 (where fault occurs)
kjones99 2:5366ce17fe55 5 DigitalOut myled3(LED3); //The pushbutton or power on caused a reset
kjones99 2:5366ce17fe55 6 DigitalOut myled4(LED4); //The watchdog timer caused a reset
kjones99 2:5366ce17fe55 7
kjones99 2:5366ce17fe55 8 // Simon's Watchdog code from
kjones99 2:5366ce17fe55 9 // http://mbed.org/forum/mbed/topic/508/
kjones99 2:5366ce17fe55 10 class Watchdog {
kjones99 2:5366ce17fe55 11 public:
kjones99 2:5366ce17fe55 12 // Load timeout value in watchdog timer and enable
kjones99 2:5366ce17fe55 13 void kick(float s) {
kjones99 2:5366ce17fe55 14 LPC_WDT->WDCLKSEL = 0x1; // Set CLK src to PCLK
kjones99 2:5366ce17fe55 15 uint32_t clk = SystemCoreClock / 16; // WD has a fixed /4 prescaler, PCLK default is /4
kjones99 2:5366ce17fe55 16 LPC_WDT->WDTC = s * (float)clk;
kjones99 2:5366ce17fe55 17 LPC_WDT->WDMOD = 0x3; // Enabled and Reset
kjones99 2:5366ce17fe55 18 kick();
kjones99 2:5366ce17fe55 19 }
kjones99 2:5366ce17fe55 20 // "kick" or "feed" the dog - reset the watchdog timer
kjones99 2:5366ce17fe55 21 // by writing this required bit pattern
kjones99 2:5366ce17fe55 22 void kick() {
kjones99 2:5366ce17fe55 23 LPC_WDT->WDFEED = 0xAA;
kjones99 2:5366ce17fe55 24 LPC_WDT->WDFEED = 0x55;
kjones99 2:5366ce17fe55 25 }
kjones99 2:5366ce17fe55 26 };