added simple spi test

git-svn-id: https://svn.spreadspace.org/mur.sat@404 7de4ea59-55d0-425e-a1af-a3118ea81d4c

2 files changed, 28 insertions, 2 deletions

diff --git a/software/hhd70dongle/hhd70dongle.c b/software/hhd70dongle/hhd70dongle.c
index 09205d1..3d72b57 100644
--- a/software/hhd70dongle/hhd70dongle.c
+++ b/software/hhd70dongle/hhd70dongle.c
@@ -46,5 +46,8 @@ int main(void)
   for(;;) {

     _delay_ms(250);

     led_toggle();

+    char buf[10];

+    int len=sizeof(buf);

+    spi_read(0,buf,&len);

   }

 }

diff --git a/software/hhd70dongle/spi.c b/software/hhd70dongle/spi.c
index 0732716..0ffa1b9 100644
--- a/software/hhd70dongle/spi.c
+++ b/software/hhd70dongle/spi.c
@@ -29,19 +29,42 @@
  *  along with mur.sat. If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#include "avr/io.h"
+
 #include "spi.h"
 
+#define SPI_DDR DDRB
+#define SPI_PORT PORTB
+#define SPI_PIN  PINB
+#define CS   0
+#define SCK  1
+#define MOSI 2
+#define MISO 3
+#define GDO2 4
+#define GDO0 5
+#define RE   6
+#define TE   7
+
 void spi_init(void)
 {
-
+  SPI_PORT = 0;
+  SPI_DDR = (1<<MOSI)|(1<<SCK)|(1<<CS);
+  SPCR = (1<<SPE)|(1<<MSTR);
+//  SPSR = (1<<SPI2X); (4MHz vs. 8MHz)
 }
 
 void spi_write(char address, char* data, int len)
 {
-
 }
 
 void spi_read(char address, char* data, int* len)
 {
+  PORTB |= (1<<CS);
+
+  while(SPI_PIN & (1<<MISO)); /* wait for CC1101 to get ready... */
+
+  SPDR = 0x80;
+  while(!(SPSR & (1<<SPIF)));
 
+  PORTB &= ~(1<<CS);
 }