Martin Spencer
A Simple program that simplifies development of SPI devices. It alows you to read and write to registers using a PC serial terminal in real time.
main.cpp@0:4568a8086f47, 2010-05-31 (annotated)
- Committer:
- martin
- Date:
- Mon May 31 18:20:25 2010 +0000
- Revision:
- 0:4568a8086f47
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| martin | 0:4568a8086f47 | 1 | // Writes hex over SPI from pc input |
| martin | 0:4568a8086f47 | 2 | |
| martin | 0:4568a8086f47 | 3 | #include "mbed.h" |
| martin | 0:4568a8086f47 | 4 | |
| martin | 0:4568a8086f47 | 5 | SPI spi(p5, p6, p7); // mosi, miso, sclk |
| martin | 0:4568a8086f47 | 6 | DigitalOut cs(p10); |
| martin | 0:4568a8086f47 | 7 | |
| martin | 0:4568a8086f47 | 8 | Serial pc(USBTX, USBRX); // tx, rx |
| martin | 0:4568a8086f47 | 9 | |
| martin | 0:4568a8086f47 | 10 | int main() { |
| martin | 0:4568a8086f47 | 11 | spi.format(8,3); |
| martin | 0:4568a8086f47 | 12 | spi.frequency(1000000); |
| martin | 0:4568a8086f47 | 13 | wait(0.1); |
| martin | 0:4568a8086f47 | 14 | |
| martin | 0:4568a8086f47 | 15 | while(1){ |
| martin | 0:4568a8086f47 | 16 | |
| martin | 0:4568a8086f47 | 17 | |
| martin | 0:4568a8086f47 | 18 | int n; |
| martin | 0:4568a8086f47 | 19 | pc.printf("hex: "); |
| martin | 0:4568a8086f47 | 20 | pc.scanf("%xx", &n); |
| martin | 0:4568a8086f47 | 21 | pc.printf("%xx", n); |
| martin | 0:4568a8086f47 | 22 | |
| martin | 0:4568a8086f47 | 23 | int o; |
| martin | 0:4568a8086f47 | 24 | |
| martin | 0:4568a8086f47 | 25 | pc.printf("hex2: "); |
| martin | 0:4568a8086f47 | 26 | pc.scanf("%xx", &o); |
| martin | 0:4568a8086f47 | 27 | pc.printf("%xx", o); |
| martin | 0:4568a8086f47 | 28 | |
| martin | 0:4568a8086f47 | 29 | // Select the device |
| martin | 0:4568a8086f47 | 30 | cs=0; |
| martin | 0:4568a8086f47 | 31 | int dataA = spi.write(n); |
| martin | 0:4568a8086f47 | 32 | //wait(0.01); |
| martin | 0:4568a8086f47 | 33 | int dataB = spi.write(o); |
| martin | 0:4568a8086f47 | 34 | cs=1; |
| martin | 0:4568a8086f47 | 35 | pc.printf("Data out = 0x%X\n", dataA); |
| martin | 0:4568a8086f47 | 36 | |
| martin | 0:4568a8086f47 | 37 | |
| martin | 0:4568a8086f47 | 38 | pc.printf("data out = 0x%X\n", dataB); |
| martin | 0:4568a8086f47 | 39 | wait(0.1); |
| martin | 0:4568a8086f47 | 40 | |
| martin | 0:4568a8086f47 | 41 | |
| martin | 0:4568a8086f47 | 42 | |
| martin | 0:4568a8086f47 | 43 | } |
| martin | 0:4568a8086f47 | 44 | |
| martin | 0:4568a8086f47 | 45 | } |