Created
March 23, 2016 13:47
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DMASPI Issue
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| #include <SPI.h> | |
| #include <DmaSpi.h> | |
| uint16_t buffer[128][128]; | |
| #define DMASIZE 16384 | |
| DmaSpi::Transfer trxA(nullptr, 0, nullptr); | |
| DmaSpi::Transfer trxB(nullptr, 0, nullptr); | |
| uint32_t transferCount = 0; | |
| void setup() { | |
| delay(4000); | |
| waitForKeyPress(); | |
| SPISettings spiSettings; | |
| SPI.begin(); | |
| DMASPI0.begin(); | |
| DMASPI0.start(); | |
| } | |
| void loop() { | |
| //if(!anyTransferBusy()){ //This was a test to see if checking the transfer busy flag would help | |
| if(!DMASPI0.busy()){ | |
| Serial.print("Starting transfer "); | |
| Serial.println(transferCount++); | |
| transfer(); | |
| } | |
| } | |
| /** Wait for and consume a keypress over USB **/ | |
| void waitForKeyPress() | |
| { | |
| Serial.println("\nPress a key to continue\n"); | |
| while(!Serial.available()); | |
| while(Serial.available()) | |
| { | |
| Serial.read(); | |
| } | |
| } | |
| void transfer(){ | |
| ActiveLowChipSelect cs(0, SPISettings()); | |
| //trxA = DmaSpi::Transfer((uint8_t*)buffer, DMASIZE, nullptr); //This config works | |
| //trxB = DmaSpi::Transfer((uint8_t*)buffer + DMASIZE, DMASIZE, nullptr); //This config works | |
| trxA = DmaSpi::Transfer((uint8_t*)buffer, DMASIZE, nullptr, 0, &cs); | |
| trxB = DmaSpi::Transfer((uint8_t*)buffer + DMASIZE, DMASIZE, nullptr, 0, &cs); | |
| DMASPI0.registerTransfer(trxA); | |
| DMASPI0.registerTransfer(trxB); | |
| } | |
| bool anyTransferBusy(){ | |
| return trxA.busy() || trxB.busy(); | |
| } |
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