on MBED,(with bread board)connect 11 12 13 14 to 5 6 7 8 Does this also work on app board?
Fork of SPI_HelloWorld_Mbed by
main.cpp@0:466ad3f38b6b, 2013-02-12 (annotated)
- Committer:
- mbed_official
- Date:
- Tue Feb 12 17:25:49 2013 +0000
- Revision:
- 0:466ad3f38b6b
- Child:
- 1:024296d963b5
SPI Hello World
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 0:466ad3f38b6b | 1 | #include "mbed.h" |
mbed_official | 0:466ad3f38b6b | 2 | |
mbed_official | 0:466ad3f38b6b | 3 | SPI spi(p5, p6, p7); // mosi, miso, sclk |
mbed_official | 0:466ad3f38b6b | 4 | DigitalOut cs(p8); |
mbed_official | 0:466ad3f38b6b | 5 | |
mbed_official | 0:466ad3f38b6b | 6 | int main() { |
mbed_official | 0:466ad3f38b6b | 7 | // Chip must be deselected |
mbed_official | 0:466ad3f38b6b | 8 | cs = 1; |
mbed_official | 0:466ad3f38b6b | 9 | |
mbed_official | 0:466ad3f38b6b | 10 | // Setup the spi for 8 bit data, high steady state clock, |
mbed_official | 0:466ad3f38b6b | 11 | // second edge capture, with a 1MHz clock rate |
mbed_official | 0:466ad3f38b6b | 12 | spi.format(8,3); |
mbed_official | 0:466ad3f38b6b | 13 | spi.frequency(1000000); |
mbed_official | 0:466ad3f38b6b | 14 | |
mbed_official | 0:466ad3f38b6b | 15 | // Select the device by seting chip select low |
mbed_official | 0:466ad3f38b6b | 16 | cs = 0; |
mbed_official | 0:466ad3f38b6b | 17 | |
mbed_official | 0:466ad3f38b6b | 18 | // Send 0x8f, the command to read the WHOAMI register |
mbed_official | 0:466ad3f38b6b | 19 | spi.write(0x8F); |
mbed_official | 0:466ad3f38b6b | 20 | |
mbed_official | 0:466ad3f38b6b | 21 | // Send a dummy byte to receive the contents of the WHOAMI register |
mbed_official | 0:466ad3f38b6b | 22 | int whoami = spi.write(0x00); |
mbed_official | 0:466ad3f38b6b | 23 | printf("WHOAMI register = 0x%X\n", whoami); |
mbed_official | 0:466ad3f38b6b | 24 | |
mbed_official | 0:466ad3f38b6b | 25 | // Deselect the device |
mbed_official | 0:466ad3f38b6b | 26 | cs = 1; |
mbed_official | 0:466ad3f38b6b | 27 | } |