Siva ram / Mbed 2 deprecated spiDMAtest

test

Dependencies:   SimpleDMA mbed-rtos mbed

Fork of spiDMAtest by Shreesha S

main.cpp@2:16545dbc88ae, 2015-07-16 (annotated)

Committer:
shreeshas95
Date:
Thu Jul 16 05:40:25 2015 +0000
Revision:
2:16545dbc88ae
Parent:
1:3cceef118195
Child:
3:972fa06ef0aa
SPI slave DMA read program for FRDMKL46Z , verified, working

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"
shreeshas95 0:f0f5102ed9ca 4
shreeshas95 1:3cceef118195 5 #define PAYLOAD_LENGTH 1024
shreeshas95 1:3cceef118195 6
shreeshas95 0:f0f5102ed9ca 7 dmaSPISlave spi(PTA16, PTA17, PTA15, PTA14);
shreeshas95 0:f0f5102ed9ca 8 RawSerial pc(USBTX, USBRX);
shreeshas95 0:f0f5102ed9ca 9 DigitalOut ledg(LED_GREEN);
shreeshas95 0:f0f5102ed9ca 10
shreeshas95 1:3cceef118195 11 bool flag = false;
shreeshas95 1:3cceef118195 12
shreeshas95 1:3cceef118195 13 void do_this(void){
shreeshas95 1:3cceef118195 14 flag = true;
shreeshas95 1:3cceef118195 15 }
shreeshas95 1:3cceef118195 16
shreeshas95 0:f0f5102ed9ca 17 int main(){
shreeshas95 0:f0f5102ed9ca 18 pc.baud(9600);
shreeshas95 0:f0f5102ed9ca 19 pc.printf("inside main\r\n");
shreeshas95 1:3cceef118195 20 spi.format(8,0);
shreeshas95 2:16545dbc88ae 21 spi.frequency(10000000);
shreeshas95 0:f0f5102ed9ca 22
shreeshas95 1:3cceef118195 23 uint8_t buffer[PAYLOAD_LENGTH] = {0};
shreeshas95 0:f0f5102ed9ca 24 pc.printf("welcome to dma test, start sending data now\r\n");
shreeshas95 2:16545dbc88ae 25
shreeshas95 2:16545dbc88ae 26 // initialise the buffer for dma
shreeshas95 2:16545dbc88ae 27 spi.bulkRead_init(buffer, PAYLOAD_LENGTH, &do_this);
shreeshas95 2:16545dbc88ae 28 // start dma read
shreeshas95 2:16545dbc88ae 29 spi.bulkRead_start();
shreeshas95 0:f0f5102ed9ca 30
shreeshas95 1:3cceef118195 31 while(true){
shreeshas95 1:3cceef118195 32 if(flag){
shreeshas95 1:3cceef118195 33 flag = false;
shreeshas95 1:3cceef118195 34 ledg = !ledg;
shreeshas95 2:16545dbc88ae 35
shreeshas95 2:16545dbc88ae 36 // for(int i = 0 ; i < PAYLOAD_LENGTH ; ++i){
shreeshas95 2:16545dbc88ae 37 // pc.printf("%02x ", buffer[i]);
shreeshas95 2:16545dbc88ae 38 // }
shreeshas95 2:16545dbc88ae 39 // pc.printf("\r\n");
shreeshas95 2:16545dbc88ae 40
shreeshas95 2:16545dbc88ae 41 // start dma again after handling the data
shreeshas95 1:3cceef118195 42 spi.bulkRead_start();
shreeshas95 1:3cceef118195 43 }
shreeshas95 0:f0f5102ed9ca 44 }
shreeshas95 0:f0f5102ed9ca 45
shreeshas95 0:f0f5102ed9ca 46 }