spi and c1101 code shuffling

git-svn-id: https://svn.spreadspace.org/mur.sat@417 7de4ea59-55d0-425e-a1af-a3118ea81d4c

6 files changed, 227 insertions, 217 deletions

diff --git a/software/hhd70dongle/Makefile b/software/hhd70dongle/Makefile
index 2b9b239..80c92b8 100644
--- a/software/hhd70dongle/Makefile
+++ b/software/hhd70dongle/Makefile
@@ -21,7 +21,7 @@
 ##

 

 NAME := hhd70dongle

-OBJ := hhd70dongle.o led.o spi.o usb_rawhid.o

+OBJ := hhd70dongle.o led.o spi.o usb_rawhid.o c1101lib.o

 BOARD_TYPE := teensy2

 

 include ../teensy.include.mk

diff --git a/software/hhd70dongle/c1101lib.c b/software/hhd70dongle/c1101lib.c
index 875e6d6..26d5fb9 100644
--- a/software/hhd70dongle/c1101lib.c
+++ b/software/hhd70dongle/c1101lib.c
@@ -36,9 +36,105 @@
 #include "spi.h"
 //#include "usb_rawhid.h"
 
+/**** Helper Functions ****/
 
-#max len: 64 bytes
-void writeTXFifo(char *buffer, len)
+char spi_c1101_exchange(char *data, int len)
+{
+    char rbyte;
+    spi_cs_enable();
+    while (len--)
+    {
+        while ( ! (SPIC1101_SB_CHIPRDY(spi_read_byte())));
+        spi_write_byte(*(data++));
+    }
+    rbyte = spi_read_byte();
+    spi_cs_disable();
+    return rbyte;
+}
+
+// note addresses range from 0x00 to 0x2F for normal registers and 0xF0 to 0xFD for special status registers
+char spi_c1101_read_register(char address)
+{
+    char data[1];
+    data[0]=address | 0x80;
+    return spi_c1101_exchange(data, 1);
+}
+
+// note addresses range from 0x00 to 0x2F for normal registers
+char spi_c1101_write_register(char address, char byte)
+{
+    char data[2];
+    data[0]=address & 0x2F;
+    data[1]=byte;
+    return spi_c1101_exchange(data, 2);
+}
+
+// note addresses range from 0x30 to 0x3D for command strobes
+char spi_c1101_strobe_command(char address)
+{
+    char data[1];
+    data[0]=address;
+    return spi_c1101_exchange(data, 1);
+}
+
+int spi_c1101_read_rxfifo(int leave_num_bytes, char *buffer, int maxlen)
+{
+    char sb;
+    int num_read = 0;
+    int num_fifo_available = 0;
+    spi_cs_enable();
+    while ( ! (SPIC1101_SB_CHIPRDY(spi_read_byte())));
+    spi_write_byte(SPIC1101_ADDR_FIFO_READ_BURST);
+    do
+    {
+        sb = spi_read_byte();
+    } while ( ! (SPIC1101_SB_CHIPRDY(sb)));
+    num_fifo_available = SPIC1101_SB_FIFO_BYTES_AVAILABLE(sb);
+    
+    while (maxlen-- && num_fifo_available - num_read <= leave_num_bytes)
+    {
+        //hope this works !!
+        buffer[num_read++] = spi_read_byte();
+    }
+    spi_cs_disable();
+    return num_read;
+}
+
+//note: always check if num_written returned == len given
+int spi_c1101_write_txfifo(char *buffer, int len)
+{
+    char sb;
+    int num_written = 0;
+    int num_fifo_available = 0;
+    spi_cs_enable();
+    while ( ! (SPIC1101_SB_CHIPRDY(spi_read_byte())));
+    spi_write_byte(SPIC1101_ADDR_FIFO_WRITE_BURST);
+    do
+    {
+        sb = spi_read_byte();
+    } while ( ! (SPIC1101_SB_CHIPRDY(sb)));
+    num_fifo_available = SPIC1101_SB_FIFO_BYTES_AVAILABLE(sb);
+    
+    //if there is less space in tx-fifo than num-byte we want to send, only fill fifo until full and leave rest of buffer unsent (for now)
+    if (num_fifo_available < len)
+        len = num_fifo_available;
+    
+    while (len--)
+    {
+        //hope this works !!
+        spi_write_byte(buffer[num_written++]);
+    }
+    spi_cs_disable();
+    return num_written;
+}
+
+
+
+/**** External Functions ****/
+
+
+//max len: 64 bytes
+void writeTXFifo(char *buffer, unsigned int len)
 {
     //check TXBYTES.NUM_TXBYTES
     // never write more bytes than avaiblabe or doom ensues
@@ -46,7 +142,7 @@ void writeTXFifo(char *buffer, len)
     
 }
 
-#max returned: 64 bytes
+//max returned: 64 bytes
 int readRXFifo(char *buffer)
 {
     //check RXBYTES.NUM_RXBYTES
@@ -56,5 +152,5 @@ int readRXFifo(char *buffer)
     //            and last read byte will be duplicated.
     // thus: don't last avialable FIFO Bytes unless we can be sure that it will be the last byte of a packet and we can be sure that a following duplicated byte is actually an Fifo duplication and not an actually recieved byte !
     
-    
+    return 0;
 }
\ No newline at end of file
diff --git a/software/hhd70dongle/c1101lib.h b/software/hhd70dongle/c1101lib.h
index 19d057f..7224a61 100644
--- a/software/hhd70dongle/c1101lib.h
+++ b/software/hhd70dongle/c1101lib.h
@@ -34,13 +34,111 @@
 
 #define C1101_FIFO_MAX_LEN 64
 
-#max len: 64 bytes
-void writeTXFifo(char *buffer, len);
+//read/write config registers:
+#define SPIC1101_ADDR_IOCFG2    0x00
+#define SPIC1101_ADDR_IOCFG1    0x01
+#define SPIC1101_ADDR_IOCFG0    0x02
+#define SPIC1101_ADDR_FIFOTHR   0x03
+#define SPIC1101_ADDR_SYNC1     0x04
+#define SPIC1101_ADDR_SYNC0     0x05
+#define SPIC1101_ADDR_PKTLEN    0x06
+#define SPIC1101_ADDR_PKTCTRL1  0x07
+#define SPIC1101_ADDR_PKTCTRL0  0x08
+#define SPIC1101_ADDR_ADDR      0x09
+#define SPIC1101_ADDR_CHANNR    0x0A
+#define SPIC1101_ADDR_FSCTRL1   0x0B
+#define SPIC1101_ADDR_FSCTRL0   0x0C
+#define SPIC1101_ADDR_FREQ2     0x0D
+#define SPIC1101_ADDR_FREQ1     0x0E
+#define SPIC1101_ADDR_FREQ0     0x0F
+#define SPIC1101_ADDR_MDMCFG4   0x10
+#define SPIC1101_ADDR_MDMCFG3   0x11
+#define SPIC1101_ADDR_MDMCFG2   0x12
+#define SPIC1101_ADDR_MDMCFG1   0x13
+#define SPIC1101_ADDR_MDMCFG0   0x14
+#define SPIC1101_ADDR_DEVIATN   0x15
+#define SPIC1101_ADDR_MCSM2     0x16
+#define SPIC1101_ADDR_MCSM1     0x17
+#define SPIC1101_ADDR_MCSM0     0x18
+#define SPIC1101_ADDR_FOCCFG    0x19
+#define SPIC1101_ADDR_BSCFG     0x1A
+#define SPIC1101_ADDR_AGCCTRL2  0x1B
+#define SPIC1101_ADDR_AGCCTRL1  0x1C
+#define SPIC1101_ADDR_AGCCTRL0  0x1D
+#define SPIC1101_ADDR_WOREVT1   0x1E
+#define SPIC1101_ADDR_WOREVT0   0x1F
+#define SPIC1101_ADDR_WORCTRL   0x20
+#define SPIC1101_ADDR_FREND1    0x21
+#define SPIC1101_ADDR_FREND0    0x22
+#define SPIC1101_ADDR_FSCAL3    0x23
+#define SPIC1101_ADDR_FSCAL2    0x24
+#define SPIC1101_ADDR_FSCAL1    0x25
+#define SPIC1101_ADDR_FSCAL0    0x26
+#define SPIC1101_ADDR_RCCTRL1   0x27
+#define SPIC1101_ADDR_RCCTRL0   0x28
+#define SPIC1101_ADDR_FSTEST    0x29
+#define SPIC1101_ADDR_PTEST     0x2A
+#define SPIC1101_ADDR_AGCTEST   0x2B
+#define SPIC1101_ADDR_TEST2     0x2C
+#define SPIC1101_ADDR_TEST1     0x2D
+#define SPIC1101_ADDR_TEST0     0x2E
 
-#max returned: 64 bytes
+//commands:
+#define SPIC1101_ADDR_SRES      0x30
+#define SPIC1101_ADDR_SFSTXON   0x31
+#define SPIC1101_ADDR_SXOFF     0x32 
+#define SPIC1101_ADDR_SCAL      0x33
+#define SPIC1101_ADDR_SRX       0x34
+#define SPIC1101_ADDR_STX       0x35
+#define SPIC1101_ADDR_SIDLE     0x36
+#define SPIC1101_ADDR_SWOR      0x38
+#define SPIC1101_ADDR_SPWD      0x39
+#define SPIC1101_ADDR_SFRX      0x3A
+#define SPIC1101_ADDR_SFTX      0x3B 
+#define SPIC1101_ADDR_SWORRST   0x3C
+#define SPIC1101_ADDR_SNOP      0x3D
+
+//readonly registers:
+#define SPIC1101_ADDR_PARTNUM        (0x30 | 0xC0)
+#define SPIC1101_ADDR_VERSION        (0x31 | 0xC0)
+#define SPIC1101_ADDR_FREQUEST       (0x32 | 0xC0)
+#define SPIC1101_ADDR_LQI            (0x33 | 0xC0)
+#define SPIC1101_ADDR_RSSI           (0x34 | 0xC0)
+#define SPIC1101_ADDR_MARCSTATE      (0x35 | 0xC0)
+#define SPIC1101_ADDR_WORTIME1       (0x36 | 0xC0)
+#define SPIC1101_ADDR_WORTIME0       (0x37 | 0xC0)
+#define SPIC1101_ADDR_PKTSTATUS      (0x38 | 0xC0)
+#define SPIC1101_ADDR_VCO_VC_DAC     (0x39 | 0xC0)
+#define SPIC1101_ADDR_TXBYTES        (0x3A | 0xC0)
+#define SPIC1101_ADDR_RXBYTES        (0x3B | 0xC0)
+#define SPIC1101_ADDR_RCCTRL1_STATUS (0x3C | 0xC0)
+#define SPIC1101_ADDR_RCCTRL0_STATUS (0x3D | 0xC0)
+
+
+#define SPIC1101_ADDR_FIFO_READ (0x3F | 0x80)
+#define SPIC1101_ADDR_FIFO_READ_BURST (0x3F | 0x80 | 0xC0)
+#define SPIC1101_ADDR_FIFO_WRITE 0x3F
+#define SPIC1101_ADDR_FIFO_WRITE_BURST (0x3F | 0x40)
+
+#define SPIC1101_SB_CHIPRDY(x) x & 0b1000000
+#define SPIC1101_SB_IDLE(x) (x & 0b0111000) == 0b000000
+#define SPIC1101_SB_RXMODE(x) (x & 0b0111000) == 0b001000
+#define SPIC1101_SB_TXMODE(x) (x & 0b0111000) == 0b010000
+#define SPIC1101_SB_FSTXON(x) (x & 0b0111000) == 0b011000
+#define SPIC1101_SB_CALIBRATE(x) (x & 0b0111000) == 0b100000
+#define SPIC1101_SB_SETTLING(x) (x & 0b0111000) == 0b101000
+#define SPIC1101_SB_RXFIFO_OVERFLOW(x) (x & 0b0111000b) == 0b110000
+#define SPIC1101_SB_TXFIFO_OVERFLOW(x) (x & 0b0111000b) == 0b111000
+#define SPIC1101_SB_FIFO_BYTES_AVAILABLE(x) (x & 0b0000111)
+
+
+//max len: 64 bytes
+void writeTXFifo(char *buffer, unsigned int len);
+
+//max returned: 64 bytes
 int readRXFifo(char *buffer);
 
-#set WakeOnRadio to enabled (true) or disabled(false)
-void setWOR(bool enable);
+//set WakeOnRadio to enabled (true) or disabled(false)
+void setWOR(int enable);
 
 #endif
diff --git a/software/hhd70dongle/hhd70dongle.c b/software/hhd70dongle/hhd70dongle.c
index 85d9d0f..7e11d45 100644
--- a/software/hhd70dongle/hhd70dongle.c
+++ b/software/hhd70dongle/hhd70dongle.c
@@ -97,8 +97,8 @@ int main(void)
         usb_rawhid_send("temp atmega: ",13);

         write_buffer[0] = '0' + internal_temp/26;

         usb_rawhid_send(write_buffer,1);        

-        char buf[10];

-        unsigned int len;

-        spi_read(sizeof(buf),buf,&len);

+        //~ char buf[10];

+        //~ unsigned int len;

+        //~ spi_read(sizeof(buf),buf,&len);

     }

 }

diff --git a/software/hhd70dongle/spi.c b/software/hhd70dongle/spi.c
index 1e2e377..c7172ce 100644
--- a/software/hhd70dongle/spi.c
+++ b/software/hhd70dongle/spi.c
@@ -77,11 +77,11 @@ void spi_write_byte(char byte)
     while(!(SPSR & (1<<SPIF))); 	// Wait for transmission complete
 }
 
-void spi_write(char* data, unsigned int len)
-{
-    for (unsigned int c=0; c<len; c++)
-        spi_write_byte(data[c]);
-}
+//~ void spi_write(char* data, unsigned int len)
+//~ {
+    //~ for (unsigned int c=0; c<len; c++)
+        //~ spi_write_byte(data[c]);
+//~ }
 
 //MSB first
 char spi_read_byte(void)
@@ -90,202 +90,15 @@ char spi_read_byte(void)
     return SPSR;
 }
 
-void spi_read(unsigned int maxlen, char *data, unsigned int *len)
-{
-    PORTB |= (1<<CS);
-
-    while(SPI_PINB_REG & (1<<MISO)); /* wait for CC1101 to get ready... */
-
-    SPDR = 0x80;
-    len = 0;
-    while(*len < maxlen && !(SPSR & (1<<SPIF)))
-        data[*len++]=SPSR;
-    PORTB &= ~(1<<CS);
-}
-
-//read/write config registers:
-#define SPIC1101_ADDR_IOCFG2    0x00
-#define SPIC1101_ADDR_IOCFG1    0x01
-#define SPIC1101_ADDR_IOCFG0    0x02
-#define SPIC1101_ADDR_FIFOTHR   0x03
-#define SPIC1101_ADDR_SYNC1     0x04
-#define SPIC1101_ADDR_SYNC0     0x05
-#define SPIC1101_ADDR_PKTLEN    0x06
-#define SPIC1101_ADDR_PKTCTRL1  0x07
-#define SPIC1101_ADDR_PKTCTRL0  0x08
-#define SPIC1101_ADDR_ADDR      0x09
-#define SPIC1101_ADDR_CHANNR    0x0A
-#define SPIC1101_ADDR_FSCTRL1   0x0B
-#define SPIC1101_ADDR_FSCTRL0   0x0C
-#define SPIC1101_ADDR_FREQ2     0x0D
-#define SPIC1101_ADDR_FREQ1     0x0E
-#define SPIC1101_ADDR_FREQ0     0x0F
-#define SPIC1101_ADDR_MDMCFG4   0x10
-#define SPIC1101_ADDR_MDMCFG3   0x11
-#define SPIC1101_ADDR_MDMCFG2   0x12
-#define SPIC1101_ADDR_MDMCFG1   0x13
-#define SPIC1101_ADDR_MDMCFG0   0x14
-#define SPIC1101_ADDR_DEVIATN   0x15
-#define SPIC1101_ADDR_MCSM2     0x16
-#define SPIC1101_ADDR_MCSM1     0x17
-#define SPIC1101_ADDR_MCSM0     0x18
-#define SPIC1101_ADDR_FOCCFG    0x19
-#define SPIC1101_ADDR_BSCFG     0x1A
-#define SPIC1101_ADDR_AGCCTRL2  0x1B
-#define SPIC1101_ADDR_AGCCTRL1  0x1C
-#define SPIC1101_ADDR_AGCCTRL0  0x1D
-#define SPIC1101_ADDR_WOREVT1   0x1E
-#define SPIC1101_ADDR_WOREVT0   0x1F
-#define SPIC1101_ADDR_WORCTRL   0x20
-#define SPIC1101_ADDR_FREND1    0x21
-#define SPIC1101_ADDR_FREND0    0x22
-#define SPIC1101_ADDR_FSCAL3    0x23
-#define SPIC1101_ADDR_FSCAL2    0x24
-#define SPIC1101_ADDR_FSCAL1    0x25
-#define SPIC1101_ADDR_FSCAL0    0x26
-#define SPIC1101_ADDR_RCCTRL1   0x27
-#define SPIC1101_ADDR_RCCTRL0   0x28
-#define SPIC1101_ADDR_FSTEST    0x29
-#define SPIC1101_ADDR_PTEST     0x2A
-#define SPIC1101_ADDR_AGCTEST   0x2B
-#define SPIC1101_ADDR_TEST2     0x2C
-#define SPIC1101_ADDR_TEST1     0x2D
-#define SPIC1101_ADDR_TEST0     0x2E
-
-//commands:
-#define SPIC1101_ADDR_SRES      0x30
-#define SPIC1101_ADDR_SFSTXON   0x31
-#define SPIC1101_ADDR_SXOFF     0x32 
-#define SPIC1101_ADDR_SCAL      0x33
-#define SPIC1101_ADDR_SRX       0x34
-#define SPIC1101_ADDR_STX       0x35
-#define SPIC1101_ADDR_SIDLE     0x36
-#define SPIC1101_ADDR_SWOR      0x38
-#define SPIC1101_ADDR_SPWD      0x39
-#define SPIC1101_ADDR_SFRX      0x3A
-#define SPIC1101_ADDR_SFTX      0x3B 
-#define SPIC1101_ADDR_SWORRST   0x3C
-#define SPIC1101_ADDR_SNOP      0x3D
-
-//readonly registers:
-#define SPIC1101_ADDR_PARTNUM        (0x30 | 0xC0)
-#define SPIC1101_ADDR_VERSION        (0x31 | 0xC0)
-#define SPIC1101_ADDR_FREQUEST       (0x32 | 0xC0)
-#define SPIC1101_ADDR_LQI            (0x33 | 0xC0)
-#define SPIC1101_ADDR_RSSI           (0x34 | 0xC0)
-#define SPIC1101_ADDR_MARCSTATE      (0x35 | 0xC0)
-#define SPIC1101_ADDR_WORTIME1       (0x36 | 0xC0)
-#define SPIC1101_ADDR_WORTIME0       (0x37 | 0xC0)
-#define SPIC1101_ADDR_PKTSTATUS      (0x38 | 0xC0)
-#define SPIC1101_ADDR_VCO_VC_DAC     (0x39 | 0xC0)
-#define SPIC1101_ADDR_TXBYTES        (0x3A | 0xC0)
-#define SPIC1101_ADDR_RXBYTES        (0x3B | 0xC0)
-#define SPIC1101_ADDR_RCCTRL1_STATUS (0x3C | 0xC0)
-#define SPIC1101_ADDR_RCCTRL0_STATUS (0x3D | 0xC0)
-
-
-#define SPIC1101_ADDR_FIFO_READ (0x3F | 0x80)
-#define SPIC1101_ADDR_FIFO_READ_BURST (0x3F | 0x80 | 0xC0)
-#define SPIC1101_ADDR_FIFO_WRITE 0x3F
-#define SPIC1101_ADDR_FIFO_WRITE_BURST (0x3F | 0x40)
-
-#define SPIC1101_SB_CHIPRDY(x) x & 0b1000000
-#define SPIC1101_SB_IDLE(x) (x & 0b0111000) == 0b000000
-#define SPIC1101_SB_RXMODE(x) (x & 0b0111000) == 0b001000
-#define SPIC1101_SB_TXMODE(x) (x & 0b0111000) == 0b010000
-#define SPIC1101_SB_FSTXON(x) (x & 0b0111000) == 0b011000
-#define SPIC1101_SB_CALIBRATE(x) (x & 0b0111000) == 0b100000
-#define SPIC1101_SB_SETTLING(x) (x & 0b0111000) == 0b101000
-#define SPIC1101_SB_RXFIFO_OVERFLOW(x) (x & 0b0111000b) == 0b110000
-#define SPIC1101_SB_TXFIFO_OVERFLOW(x) (x & 0b0111000b) == 0b111000
-#define SPIC1101_SB_FIFO_BYTES_AVAILABLE(x) (x & 0b0000111)
-
-char spi_c1101_exchange(char *data, int len)
-{
-    char rbyte;
-    spi_cs_enable();
-    while (len--)
-    {
-        while ( ! (SPIC1101_SB_CHIPRDY(spi_read_byte())));
-        spi_write_byte(*(data++));
-    }
-    rbyte = spi_read_byte();
-    spi_cs_disable();
-    return rbyte;
-}
-
-// note addresses range from 0x00 to 0x2F for normal registers and 0xF0 to 0xFD for special status registers
-char spi_c1101_read_register(char address)
-{
-    char data[1];
-    data[0]=address | 0x80;
-    return spi_c1101_exchange(data, 1);
-}
+//~ void spi_read(unsigned int maxlen, char *data, unsigned int *len)
+//~ {
+    //~ PORTB |= (1<<CS);
 
-// note addresses range from 0x00 to 0x2F for normal registers
-char spi_c1101_write_register(char address, char byte)
-{
-    char data[2];
-    data[0]=address & 0x2F;
-    data[1]=byte;
-    return spi_c1101_exchange(data, 2);
-}
+    //~ while(SPI_PINB_REG & (1<<MISO)); /* wait for CC1101 to get ready... */
 
-// note addresses range from 0x30 to 0x3D for command strobes
-char spi_c1101_strobe_command(char address)
-{
-    char data[1];
-    data[0]=address;
-    return spi_c1101_exchange(data, 1);
-}
-
-int spi_c1101_read_rxfifo(int leave_num_bytes, char *buffer, int maxlen)
-{
-    char sb;
-    int num_read = 0;
-    int num_fifo_available = 0;
-    spi_cs_enable();
-    while ( ! (SPIC1101_SB_CHIPRDY(spi_read_byte())));
-    spi_write_byte(SPIC1101_ADDR_FIFO_READ_BURST);
-    do
-    {
-        sb = spi_read_byte();
-    } while ( ! (SPIC1101_SB_CHIPRDY(sb)));
-    num_fifo_available = SPIC1101_SB_FIFO_BYTES_AVAILABLE(sb);
-    
-    while (maxlen-- && num_fifo_available - num_read <= leave_num_bytes)
-    {
-        //hope this works !!
-        buffer[num_read++] = spi_read_byte();
-    }
-    spi_cs_disable();
-    return num_read;
-}
-
-//note: always check if num_written returned == len given
-int spi_c1101_write_txfifo(char *buffer, int len)
-{
-    char sb;
-    int num_written = 0;
-    int num_fifo_available = 0;
-    spi_cs_enable();
-    while ( ! (SPIC1101_SB_CHIPRDY(spi_read_byte())));
-    spi_write_byte(SPIC1101_ADDR_FIFO_WRITE_BURST);
-    do
-    {
-        sb = spi_read_byte();
-    } while ( ! (SPIC1101_SB_CHIPRDY(sb)));
-    num_fifo_available = SPIC1101_SB_FIFO_BYTES_AVAILABLE(sb);
-    
-    //if there is less space in tx-fifo than num-byte we want to send, only fill fifo until full and leave rest of buffer unsent (for now)
-    if (num_fifo_available < len)
-        len = num_fifo_available;
-    
-    while (len--)
-    {
-        //hope this works !!
-        spi_write_byte(buffer[num_written++]);
-    }
-    spi_cs_disable();
-    return num_written;
-}
\ No newline at end of file
+    //~ SPDR = 0x80;
+    //~ len = 0;
+    //~ while(*len < maxlen && !(SPSR & (1<<SPIF)))
+        //~ data[*len++]=SPSR;
+    //~ PORTB &= ~(1<<CS);
+//~ }
diff --git a/software/hhd70dongle/spi.h b/software/hhd70dongle/spi.h
index 8d1ac67..8b45493 100644
--- a/software/hhd70dongle/spi.h
+++ b/software/hhd70dongle/spi.h
@@ -34,8 +34,11 @@
 #define MURSAT_spi_h_INCLUDED
 
 void spi_init(void);
+void spi_cs_enable(void);
+void spi_cs_disable(void);
 void spi_write_byte(char byte);
-void spi_write(char* data,unsigned int len);
-void spi_read(unsigned int maxlen, char *data, unsigned int *len);
+char spi_read_byte(void);
+//~ void spi_write(char* data,unsigned int len);
+//~ void spi_read(unsigned int maxlen, char *data, unsigned int *len);
 
 #endif