giomba/nes-proj
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

remove some unnecessary instructions and function calls. patch from Jesper Karlsson.

Browse Source
This commit is contained in:
nvt-se 2009-03-24 15:13:11 +00:00
parent 143c7f9cea
commit 15c447e57e
1 changed files with 24 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

71
platform/msb430/dev/cc1020.c
View File

@ -178,7 +178,7 @@ cc1020_set_rx(void)
UBR00 = 0x00; // No baudrate divider
UBR10 = 0x00; // settings for a spi
UMCTL0 = 0x00; // slave.
ME1 |= USPIE0; // Enable USART0 TXD/RXD, disabling does not yield any powersavings
ME1 |= URXE0; // Enable USART0 RXD, disabling does not yield any powersavings
P3SEL |= 0x0A; // Select rx line and clk
UCTL0 &= ~SWRST; // Clear reset bit
splx(s);
@ -233,6 +233,7 @@ cc1020_send(const void *buf, unsigned short len)
{
int try;
int normal_header = HDRSIZE + len;
int i;
uint16_t rxcrc = 0xFFFF; // For checksum purposes
if(cc1020_state == CC1020_OFF) {
@ -254,9 +255,8 @@ cc1020_send(const void *buf, unsigned short len)
rxcrc = crc16_add((uint8_t) (normal_header & 0xff), rxcrc);
rxcrc = crc16_add((uint8_t) ((normal_header >> 8)& 0xff), rxcrc);
int i=0;
for(i=0;i<len;i++){
rxcrc = crc16_add((uint8_t) ((char*)buf)[i], rxcrc);
for(i = 0; i < len; i++) {
rxcrc = crc16_add((uint8_t) ((char*)buf)[i], rxcrc);
}
// data to send
@ -276,10 +276,11 @@ cc1020_send(const void *buf, unsigned short len)
for(try = 0; try < CC1020_CONF_CCA_TIMEOUT; try++) {
MS_DELAY(1);
if(!cc1020_carrier_sense()) {
break;
break;
}
}
if(try == CC1020_CONF_CCA_TIMEOUT) {
printf("CCA failed rssi: %d\n", cc1020_get_rssi());
return -3;
}
@ -375,7 +376,7 @@ cc1020_off(void)
uint8_t
cc1020_get_rssi(void)
{
return cc1020_read_reg(CC1020_RSS);
return (cc1020_read_reg(CC1020_RSS) & 0x7F);
}
uint8_t
@ -384,12 +385,10 @@ cc1020_get_packet_rssi(void)
return rssi;
}
int
cc1020_carrier_sense(void)
{
return !!(cc1020_read_reg(CC1020_STATUS) & CARRIER_SENSE);
return (cc1020_read_reg(CC1020_STATUS) & CARRIER_SENSE);
}
PROCESS_THREAD(cc1020_receiver_process, ev, data)
@ -416,10 +415,10 @@ PROCESS_THREAD(cc1020_receiver_process, ev, data)
}
if(expected_crc == actual_crc) {
receiver_callback(&cc1020_driver);
receiver_callback(&cc1020_driver);
} else {
RIMESTATS_ADD(badcrc);
reset_receiver();
RIMESTATS_ADD(badcrc);
reset_receiver();
}
}
}
@ -477,7 +476,7 @@ interrupt(UART0RX_VECTOR) cc1020_rxhandler(void)
} else {
return;
}
rssi = cc1020_read_reg(CC1020_RSS);
rssi = cc1020_get_rssi();
CC1020_SET_OPSTATE(CC1020_RX | CC1020_RX_RECEIVING);
} else if(cc1020_state & CC1020_RX_RECEIVING) {
if(syncbs == 0) {
@ -499,15 +498,15 @@ interrupt(UART0RX_VECTOR) cc1020_rxhandler(void)
if(cc1020_rxlen == HDRSIZE) {
pktlen = ((struct cc1020_header *)cc1020_rxbuf)->length;
if(pktlen == 0 || pktlen > sizeof (cc1020_rxbuf)) {
cc1020_rxlen = 0;
CC1020_SET_OPSTATE(CC1020_RX | CC1020_RX_SEARCHING);
cc1020_rxlen = 0;
CC1020_SET_OPSTATE(CC1020_RX | CC1020_RX_SEARCHING);
}
} else if(cc1020_rxlen > HDRSIZE) {
if(cc1020_rxlen == pktlen) {
/* Disable interrupts while processing the packet. */
DISABLE_RX_IRQ();
CC1020_SET_OPSTATE(CC1020_RX | CC1020_RX_PROCESSING);
_BIC_SR_IRQ(LPM3_bits);
CC1020_SET_OPSTATE(CC1020_RX | CC1020_RX_PROCESSING);
_BIC_SR_IRQ(LPM3_bits);
process_poll(&cc1020_receiver_process);
}
}
@ -517,18 +516,15 @@ interrupt(UART0RX_VECTOR) cc1020_rxhandler(void)
static void
cc1020_write_reg(uint8_t addr, uint8_t adata)
{
unsigned i;
unsigned char data;
unsigned int i;
uint8_t data;
PSEL_OFF;
data = addr << 1;
PSEL_ON;
// Send address bits
for(i = 0; i < 7; i++) {
nop();
PCLK_LOW;
nop();
if(data & 0x80) {
PDI_HIGH;
} else {
@ -536,24 +532,20 @@ cc1020_write_reg(uint8_t addr, uint8_t adata)
}
data = data << 1;
PCLK_HIGH;
nop();
}
// Send read/write bit
// Ignore bit in data, always use 1
nop();
PCLK_LOW;
PDI_HIGH;
nop();
PCLK_HIGH;
nop();
PCLK_LOW;
data = adata;
// Send data bits
for(i = 0; i < 8; i++) {
nop();
PCLK_LOW;
nop();
if(data & 0x80) {
PDI_HIGH;
} else {
@ -561,30 +553,25 @@ cc1020_write_reg(uint8_t addr, uint8_t adata)
}
data = data << 1;
PCLK_HIGH;
nop();
}
nop();
PCLK_LOW;
nop();
PSEL_OFF;
}
static uint8_t
cc1020_read_reg(uint8_t addr)
{
unsigned i;
unsigned char data = 0;
unsigned int i;
uint8_t data;
PSEL_OFF;
data = addr << 1;
PSEL_ON;
nop();
// Send address bits
for(i = 0; i < 7; i++) {
nop();
PCLK_LOW;
nop();
if(data & 0x80) {
PDI_HIGH;
} else {
@ -592,14 +579,13 @@ cc1020_read_reg(uint8_t addr)
}
data = data << 1;
PCLK_HIGH;
nop();
}
// Send read/write bit
// Ignore bit in data, always use 0
nop();
PCLK_LOW;
PDI_LOW;
nop();
PCLK_HIGH;
nop();
PCLK_LOW;
@ -613,11 +599,9 @@ cc1020_read_reg(uint8_t addr)
if(PDO) {
data++;
}
nop();
PCLK_LOW;
}
nop();
PSEL_OFF;
return data;
@ -697,15 +681,11 @@ cc1020_setupRX(int analog)
char lock_status;
// Switch into RX, switch to freq. reg A
cc1020_write_reg(CC1020_MAIN, 0x11);
// Setup bias current adjustment
cc1020_write_reg(CC1020_ANALOG, analog);
cc1020_write_reg(CC1020_MAIN, 0x01);
MS_DELAY(1);
lock_status = cc1020_lock();
// Switch RX part of CC1020 on
cc1020_write_reg(CC1020_MAIN, 0x01);
cc1020_write_reg(CC1020_INTERFACE, 0x02);
// Return LOCK status to application
@ -717,9 +697,6 @@ cc1020_setupTX(int analog)
{
char lock_status;
// Setup bias current adjustment
cc1020_write_reg(CC1020_ANALOG, analog);
// Switch into TX, switch to freq. reg B
cc1020_write_reg(CC1020_MAIN, 0xC1);
MS_DELAY(1);