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More clear power down procedure. Now it is required that cc1020_on

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is called before anyone can send after the power down.
This commit is contained in:
nvt-se 2007-10-02 14:05:45 +00:00
parent d5580ae7ee
commit fb9b800c53
2 changed files with 28 additions and 21 deletions
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2
platform/msb430/dev/cc1020-internal.h
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@ -241,6 +241,6 @@ struct cc1020_header {
/// cc1020 receiver state /// cc1020 receiver state
enum cc1020_rxstate { enum cc1020_rxstate {
CC1020_RX_SEARCHING, // searching for preamble + sync word CC1020_RX_SEARCHING, // searching for preamble + sync word
CC1020_RX_RECEIVE, // receiving bytes CC1020_RX_RECEIVING, // receiving bytes
CC1020_RX_PROCESSING // processing data in buffer CC1020_RX_PROCESSING // processing data in buffer
}; };

37
platform/msb430/dev/cc1020.c
View file

@ -76,7 +76,7 @@ static enum cc1020_state cc1020_state = CC1020_OFF;
static volatile uint8_t cc1020_rxbuf[HDRSIZE + CC1020_BUFFERSIZE]; static volatile uint8_t cc1020_rxbuf[HDRSIZE + CC1020_BUFFERSIZE];
static uint8_t cc1020_txbuf[PREAMBLESIZE + HDRSIZE + CC1020_BUFFERSIZE + static uint8_t cc1020_txbuf[PREAMBLESIZE + HDRSIZE + CC1020_BUFFERSIZE +
TAILSIZE]; TAILSIZE];
static enum cc1020_rxstate cc1020_rxstate = CC1020_RX_SEARCHING; static volatile enum cc1020_rxstate cc1020_rxstate = CC1020_RX_SEARCHING;
/// number of bytes in receive and transmit buffers respectively. /// number of bytes in receive and transmit buffers respectively.
static uint16_t cc1020_rxlen; static uint16_t cc1020_rxlen;
@ -199,6 +199,9 @@ cc1020_set_power(uint8_t pa_power)
int int
cc1020_send(const void *buf, unsigned short len) cc1020_send(const void *buf, unsigned short len)
{ {
if (cc1020_state == CC1020_OFF)
return -2;
if (len > CC1020_BUFFERSIZE) if (len > CC1020_BUFFERSIZE)
return -1; return -1;
@ -265,8 +268,8 @@ cc1020_off(void)
{ {
int s; int s;
if (cc1020_rxstate == CC1020_OFF) // Discard the current read buffer when the radio is shutting down.
return 1; cc1020_rxlen = 0;
LNA_POWER_OFF(); // power down lna LNA_POWER_OFF(); // power down lna
s = splhigh(); s = splhigh();
@ -275,6 +278,7 @@ cc1020_off(void)
cc1020_state = CC1020_OFF; cc1020_state = CC1020_OFF;
splx(s); splx(s);
cc1020_setupPD(); // power down radio cc1020_setupPD(); // power down radio
cc1020_state = CC1020_OFF;
return 1; return 1;
} }
@ -335,19 +339,17 @@ interrupt(UART0RX_VECTOR) cc1020_rxhandler(void)
} else { } else {
return; return;
} }
// Update RSSI. // Update RSSI.
rssi = cc1020_read_reg(CC1020_RSS); rssi = cc1020_read_reg(CC1020_RSS);
cc1020_rxstate = CC1020_RX_RECEIVING;
cc1020_rxstate = CC1020_RX_RECEIVE;
break; break;
case CC1020_RX_RECEIVE: case CC1020_RX_RECEIVING:
if (syncbs == 0) { if (syncbs == 0) {
cc1020_rxbuf[cc1020_rxlen] = RXBUF0; cc1020_rxbuf[cc1020_rxlen] = RXBUF0;
} else { } else {
shiftbuf.b3 = shiftbuf.b4; shiftbuf.b3 = shiftbuf.b4;
shiftbuf.b4 = RXBUF0; shiftbuf.b4 = RXBUF0;
if (syncbs < 0) { if (syncbs < 0) {
shiftbuf.i1 = shiftbuf.i2 << -syncbs; shiftbuf.i1 = shiftbuf.i2 << -syncbs;
cc1020_rxbuf[cc1020_rxlen] = shiftbuf.b1; cc1020_rxbuf[cc1020_rxlen] = shiftbuf.b1;
@ -365,8 +367,9 @@ interrupt(UART0RX_VECTOR) cc1020_rxhandler(void)
cc1020_rxstate = CC1020_RX_PROCESSING; cc1020_rxstate = CC1020_RX_PROCESSING;
// call receiver to copy from buffer // call receiver to copy from buffer
if (receiver_callback != NULL) if (receiver_callback != NULL) {
receiver_callback(&cc1020_driver); receiver_callback(&cc1020_driver);
}
// reset receiver // reset receiver
cc1020_rxlen = 0; cc1020_rxlen = 0;
@ -387,10 +390,8 @@ PROCESS_THREAD(cc1020_sender_process, ev, data)
dma_subscribe(0, &cc1020_sender_process); dma_subscribe(0, &cc1020_sender_process);
while (1) { while (1) {
PROCESS_WAIT_UNTIL(cc1020_txlen > 0); PROCESS_WAIT_UNTIL(cc1020_txlen > 0 && cc1020_state != CC1020_OFF);
// Radio could be in OFF or RX mode.
if (cc1020_state == CC1020_OFF)
cc1020_set_rx(); cc1020_set_rx();
if (cc1020_rxstate != CC1020_RX_SEARCHING) { if (cc1020_rxstate != CC1020_RX_SEARCHING) {
@ -414,7 +415,7 @@ PROCESS_THREAD(cc1020_sender_process, ev, data)
// clean up // clean up
cc1020_txlen = 0; cc1020_txlen = 0;
cc1020_on(); cc1020_set_rx();
} }
PROCESS_END(); PROCESS_END();
@ -643,11 +644,17 @@ cc1020_setupTX(int analog)
static void static void
cc1020_setupPD(void) cc1020_setupPD(void)
{ {
// Put CC1020 into power-down /*
cc1020_write_reg(CC1020_MAIN, 0x1F); * Power down components an reset all registers except MAIN
* to their default values.
*/
cc1020_write_reg(CC1020_MAIN,
RESET_N | BIAS_PD | FS_PD | XOSC_PD | PD_MODE_1);
// Turn off PA to minimise current draw /* Turn off the power amplifier. */
cc1020_write_reg(CC1020_PA_POWER, 0x00); cc1020_write_reg(CC1020_PA_POWER, 0x00);
cc1020_write_reg(CC1020_POWERDOWN, 0x1F);
} }
static void static void