shubham c / Mbed 2 deprecated spiDMAtest

DMA for Science thread

Dependencies:   SimpleDMA mbed-rtos mbed

Fork of spiDMAtest by Shreesha S

main.cpp@4:9cc2653d3e83, 2016-09-24 (annotated)

Committer:
ee12b079
Date:
Sat Sep 24 08:13:32 2016 +0000
Revision:
4:9cc2653d3e83
Parent:
2:16545dbc88ae 
checking dma - 24-09-2016

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shreeshas95 0:f0f5102ed9ca 1 #include "mbed.h"
shreeshas95 0:f0f5102ed9ca 2 #include "SimpleDMA.h"
shreeshas95 0:f0f5102ed9ca 3 #include "dmaSPIslave.h"
ee12b079 4:9cc2653d3e83 4 #define PAYLOAD_LENGTH 6723
ee12b079 4:9cc2653d3e83 5 #define PAY_SPI_MOSI PTE18
ee12b079 4:9cc2653d3e83 6 #define PAY_SPI_MISO PTE19
ee12b079 4:9cc2653d3e83 7 #define PAY_SPI_CLK PTE17
ee12b079 4:9cc2653d3e83 8 #define PAY_SPI_CS PTE16
ee12b079 4:9cc2653d3e83 9 Timer T;
ee12b079 4:9cc2653d3e83 10 dmaSPISlave spi(PAY_SPI_MOSI, PAY_SPI_MISO, PAY_SPI_CLK, PAY_SPI_CS);
shreeshas95 0:f0f5102ed9ca 11 RawSerial pc(USBTX, USBRX);
ee12b079 4:9cc2653d3e83 12 DigitalOut ledg(PTB11);
shreeshas95 0:f0f5102ed9ca 13
shreeshas95 1:3cceef118195 14 bool flag = false;
shreeshas95 1:3cceef118195 15
shreeshas95 1:3cceef118195 16 void do_this(void){
shreeshas95 1:3cceef118195 17 flag = true;
shreeshas95 1:3cceef118195 18 }
shreeshas95 1:3cceef118195 19
shreeshas95 0:f0f5102ed9ca 20 int main(){
ee12b079 4:9cc2653d3e83 21 pc.baud(1200);
shreeshas95 0:f0f5102ed9ca 22 pc.printf("inside main\r\n");
shreeshas95 1:3cceef118195 23 spi.format(8,0);
ee12b079 4:9cc2653d3e83 24 spi.frequency(1000000);
shreeshas95 0:f0f5102ed9ca 25
shreeshas95 1:3cceef118195 26 uint8_t buffer[PAYLOAD_LENGTH] = {0};
shreeshas95 0:f0f5102ed9ca 27 pc.printf("welcome to dma test, start sending data now\r\n");
shreeshas95 2:16545dbc88ae 28
shreeshas95 2:16545dbc88ae 29 // initialise the buffer for dma
shreeshas95 2:16545dbc88ae 30 spi.bulkRead_init(buffer, PAYLOAD_LENGTH, &do_this);
shreeshas95 2:16545dbc88ae 31 // start dma read
shreeshas95 2:16545dbc88ae 32 spi.bulkRead_start();
ee12b079 4:9cc2653d3e83 33 T.start();
shreeshas95 1:3cceef118195 34 while(true){
shreeshas95 1:3cceef118195 35 if(flag){
shreeshas95 1:3cceef118195 36 flag = false;
shreeshas95 1:3cceef118195 37 ledg = !ledg;
ee12b079 4:9cc2653d3e83 38 pc.printf("re %f\n",T.read());
ee12b079 4:9cc2653d3e83 39 /*for(int i = 0 ; i < PAYLOAD_LENGTH ; ++i){
ee12b079 4:9cc2653d3e83 40 pc.printf("%02x ", buffer[i]);
ee12b079 4:9cc2653d3e83 41 }
ee12b079 4:9cc2653d3e83 42 pc.printf("\r\n");*/
shreeshas95 2:16545dbc88ae 43
shreeshas95 2:16545dbc88ae 44 // start dma again after handling the data
shreeshas95 1:3cceef118195 45 spi.bulkRead_start();
shreeshas95 1:3cceef118195 46 }
shreeshas95 0:f0f5102ed9ca 47 }
shreeshas95 0:f0f5102ed9ca 48
shreeshas95 0:f0f5102ed9ca 49 }