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Added support for transmitting a string.
[goodfet]
/
firmware
/
apps
/
spi
/
spi.c
diff --git
a/firmware/apps/spi/spi.c
b/firmware/apps/spi/spi.c
index
2b53914
..
e6fb370
100644
(file)
--- a/
firmware/apps/spi/spi.c
+++ b/
firmware/apps/spi/spi.c
@@
-43,8
+43,6
@@
unsigned char spitrans8(unsigned char byte){
//This function came from the SPI Wikipedia article.
//Minor alterations.
//This function came from the SPI Wikipedia article.
//Minor alterations.
- P5OUT&=~SS;
-
for (bit = 0; bit < 8; bit++) {
/* write MOSI on trailing edge of previous clock */
if (byte & 0x80)
for (bit = 0; bit < 8; bit++) {
/* write MOSI on trailing edge of previous clock */
if (byte & 0x80)
@@
-65,8
+63,6
@@
unsigned char spitrans8(unsigned char byte){
CLRCLK;
}
CLRCLK;
}
- P5OUT|=SS;
-
return byte;
}
return byte;
}
@@
-74,12
+70,16
@@
unsigned char spitrans8(unsigned char byte){
void spihandle(unsigned char app,
unsigned char verb,
unsigned char len){
void spihandle(unsigned char app,
unsigned char verb,
unsigned char len){
+ unsigned char i;
switch(verb){
//PEEK and POKE might come later.
case READ:
case WRITE:
switch(verb){
//PEEK and POKE might come later.
case READ:
case WRITE:
- cmddata[0]=spitrans8(cmddata[0]);
- txdata(app,verb,1);
+ P5OUT&=~SS; //Drop !SS to begin transaction.
+ for(i=0;i<len;i++)
+ cmddata[i]=spitrans8(cmddata[i]);
+ P5OUT|=SS; //Raise !SS to end transaction.
+ txdata(app,verb,len);
break;
case SETUP:
spisetup();
break;
case SETUP:
spisetup();