Marcelo Rebonatto / Mbed 2 deprecated PMED_Tempo

Versão do protegemed que calcula o tempo em ms da fuga, calcula o numero de onverflow (valores muito baixo) e underflow (valores muito altos). Além disso, calcula um valor médio a partir dos valores capturados e não apenas pela fft.

Dependencies:   EthernetInterface mbed-rtos mbed

Drivers/dma.c@0:c64e1194230b, 2014-07-09 (annotated)

Committer:
rebonatto
Date:
Wed Jul 09 21:16:23 2014 +0000
Revision:
0:c64e1194230b
Vers?o do Protegemed com calculo de tempo de fuga, overflow, underflow e novo valor m?dio (manual).

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rebonatto 0:c64e1194230b 1 /*
rebonatto 0:c64e1194230b 2 * dma.c
rebonatto 0:c64e1194230b 3 *
rebonatto 0:c64e1194230b 4 * Created on: 03/07/2011
rebonatto 0:c64e1194230b 5 * Author: francisco
rebonatto 0:c64e1194230b 6 */
rebonatto 0:c64e1194230b 7 #include <LPC17xx.h>
rebonatto 0:c64e1194230b 8 #include "dma.h"
rebonatto 0:c64e1194230b 9
rebonatto 0:c64e1194230b 10 #define LPC_GPDMACH ((LPC_GPDMACH_TypeDef **) LPC_GPDMACH0_BASE )
rebonatto 0:c64e1194230b 11
rebonatto 0:c64e1194230b 12 void init_dma()
rebonatto 0:c64e1194230b 13 {
rebonatto 0:c64e1194230b 14 LPC_SC->PCONP |= 1<<29; //Power GPDMA module
rebonatto 0:c64e1194230b 15
rebonatto 0:c64e1194230b 16 LPC_GPDMA->DMACConfig = 1; //Enable GPDMA
rebonatto 0:c64e1194230b 17
rebonatto 0:c64e1194230b 18 //Clear any previous interrupts
rebonatto 0:c64e1194230b 19 LPC_GPDMA->DMACIntTCClear = 0xFF;
rebonatto 0:c64e1194230b 20 LPC_GPDMA->DMACIntErrClr = 0xFF;
rebonatto 0:c64e1194230b 21
rebonatto 0:c64e1194230b 22 NVIC_SetPriority(DMA_IRQn,(1<<__NVIC_PRIO_BITS) - 1);
rebonatto 0:c64e1194230b 23 NVIC_EnableIRQ(DMA_IRQn);
rebonatto 0:c64e1194230b 24 }
rebonatto 0:c64e1194230b 25
rebonatto 0:c64e1194230b 26 void setup_channel(dmaLinkedListNode* pList,int ch,int src,int dst)
rebonatto 0:c64e1194230b 27 {
rebonatto 0:c64e1194230b 28 //Initialize the channel with previously configured LL;
rebonatto 0:c64e1194230b 29 LPC_GPDMACH0->DMACCSrcAddr = pList->sourceAddr;
rebonatto 0:c64e1194230b 30 LPC_GPDMACH0->DMACCDestAddr = pList->destAddr;
rebonatto 0:c64e1194230b 31 LPC_GPDMACH0->DMACCControl = pList->dmaControl;
rebonatto 0:c64e1194230b 32 LPC_GPDMACH0->DMACCLLI = (unsigned long int) pList & 0xFFFFFFFC; //Lower bits must be 0
rebonatto 0:c64e1194230b 33
rebonatto 0:c64e1194230b 34 int transfer_type;
rebonatto 0:c64e1194230b 35 if(src == DMA_MEMORY && dst != DMA_MEMORY)
rebonatto 0:c64e1194230b 36 {
rebonatto 0:c64e1194230b 37 transfer_type = DMA_MEMORY_TO_PERIPHERAL;
rebonatto 0:c64e1194230b 38 src = 0;
rebonatto 0:c64e1194230b 39 }
rebonatto 0:c64e1194230b 40 else if(src != DMA_MEMORY && dst == DMA_MEMORY)
rebonatto 0:c64e1194230b 41 {
rebonatto 0:c64e1194230b 42 transfer_type = DMA_PERIPHERAL_TO_MEMORY;
rebonatto 0:c64e1194230b 43 dst = 0;
rebonatto 0:c64e1194230b 44 }
rebonatto 0:c64e1194230b 45 else if(src == DMA_MEMORY && dst == DMA_MEMORY)
rebonatto 0:c64e1194230b 46 {
rebonatto 0:c64e1194230b 47 transfer_type = DMA_MEMORY_TO_MEMORY;
rebonatto 0:c64e1194230b 48 src=dst = 0;
rebonatto 0:c64e1194230b 49 }
rebonatto 0:c64e1194230b 50 else if(src != DMA_MEMORY && dst != DMA_MEMORY)
rebonatto 0:c64e1194230b 51 transfer_type = DMA_PERIPHERAL_TO_PERIPHERAL;
rebonatto 0:c64e1194230b 52
rebonatto 0:c64e1194230b 53 //Set up all relevant bits
rebonatto 0:c64e1194230b 54 LPC_GPDMACH0->DMACCConfig = (src<<1) | (dst<<5) | (transfer_type<<11) | (1<<15);
rebonatto 0:c64e1194230b 55
rebonatto 0:c64e1194230b 56 //Finally, enable the channel -
rebonatto 0:c64e1194230b 57 LPC_GPDMACH0->DMACCConfig |= 1<<0;
rebonatto 0:c64e1194230b 58 }
rebonatto 0:c64e1194230b 59
rebonatto 0:c64e1194230b 60 void stop_channel()
rebonatto 0:c64e1194230b 61 {
rebonatto 0:c64e1194230b 62 LPC_GPDMACH0->DMACCConfig &= ~(1<<0);
rebonatto 0:c64e1194230b 63 }