test
Dependencies: SimpleDMA mbed-rtos mbed
Fork of spiDMAtest by
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?
User | Revision | Line number | New 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 | } |