uses {
interface HplMsp430UsciReg as Registers;
interface HplMsp430UsciInt as Interrupts;
- interface HplMsp430GeneralIO as RXD; /* Msp430Gpio no access to PxREN */
+ interface HplMsp430GeneralIO as RXD;
interface HplMsp430GeneralIO as TXD;
- interface Msp430UsciUartConfigure; /* maybe just Msp430UsciConfigure */
- interface Counter<T32khz,uint16_6>
+ interface AsyncConfigure<const msp430_usci_uart_t*> as Configure;
+ interface Counter<T32khz,uint16_t>;
interface ArbiterInfo;
}
}
uint8_t* rbuf; /* Position of next byte in which to receive a char */
uint8_t rlen; /* Remaining length in receive buffer */
- async command void ResourceConfigure.configure();
+ async command void ResourceConfigure.configure()
{
- call Registers.setCtl0(UCSYNC);
- /* Save pin states */
- dir = out = ren = 0;
- saveBits(RXD, 0, dir, out, ren);
- saveBits(TXD, 1, dir, out, ren);
- /* FIXME: use Msp430UsciConfig to configure ports */
- /* FIXME: we may need to have REN/DIR stuff in the configuration... */
- call RXD.selectModuleFunc();
- call TXD.selectModuleFunc();
- /* Clear interrupts; we'll add them as needed */
- call Registers.clrCtl1(UCRXEIE|UCBRKIE);
- call Registers.clrIeRx();
- call Registers.clrIeTx();
- /* Enable the device */
- call Registers.clrCtl0(UCSYNC);
+ atomic {
+ const msp430_usci_uart_t* config = call Configure.get();
+
+ call Registers.setCtl1(UCSWRST);
+
+ /* Configure USCI registers */
+ call Registers.assignCtl0(config->ctl0 & ~UCSYNC);
+ call Registers.assignCtl1(config->ctl1 | UCSWRST);
+ call Registers.assignBr0(config->brx & 0xff);
+ call Registers.assignBr1(config->brx >> 8);
+ call Registers.assignMctl(config->mctl);
+ call Registers.assignIrtctl(config->irtctl);
+ call Registers.assignIrrctl(config->irrctl);
+ call Registers.assignAbctl(config->abctl);
+ call Registers.clrStat(UCLISTEN);
+
+ /* Save pin IO states */
+ dir = out = ren = 0;
+ saveBits(RXD, 0, dir, out, ren);
+ saveBits(TXD, 1, dir, out, ren);
+
+ /* Configure RX pin for UART use */
+ call RXD.makeInput();
+ if (config->ren & USCI_REN_RX) {
+ if (config->ren & USCI_REN_RX_PULLUP)
+ call RXD.set();
+ else
+ call RXD.clr();
+ call RXD.enableRen();
+ }
+ call RXD.selectModuleFunc();
+
+#if 0 /* pull-ups don't make sense on TXD, since it doesn't appear that
+ * enabling an open-drain emulation mode via USCI is possible.
+ */
+
+ /* Configure TX pin for UART use */
+ if (config->ren & USCI_REN_TX) {
+ if (config->ren & USCI_REN_TX_PULLUP)
+ call TXD.set();
+ else
+ call TXD.clr();
+ call TXD.enableRen();
+ }
+ call TXD.selectModuleFunc();
+#endif
+
+ /* Clear interrupts; we'll add them as needed */
+ call Registers.clrIeRx();
+ call Registers.clrIeTx();
+
+ /* Enable the device */
+ call Registers.clrCtl1(UCSWRST);
+ }
}
- async command void ResourceConfigure.unconfigure();
+ async command void ResourceConfigure.unconfigure()
{
- /* Disable the device */
- call Registers.setCtl0(UCSYNC);
- /* Clear interrupts and interrupt flags */
- call Registers.clrIeRx();
- call Registers.clrIeTx();
- call Registers.clrIfgRx();
- call Registers.clrIfgTx();
- /* Restore pins to state just before configure() */
- restoreBits(RXD, 0, dir, out, ren);
- restoreBits(TXD, 0, dir, out, ren);
- call RXD.selectIOFunc();
- call TXD.selectIOFunc();
+ atomic {
+ /* Disable the device */
+ call Registers.setCtl1(UCSYNC);
+
+ /* Clear interrupts and interrupt flags */
+ call Registers.clrIeRx();
+ call Registers.clrIeTx();
+ call Registers.clrIfgRx();
+ call Registers.clrIfgTx();
+
+ /* Restore pins to their preconfigured state */
+#if 0
+ restoreBits(RXD, 0, dir, out, ren);
+ restoreBits(TXD, 0, dir, out, ren);
+#endif
+ call RXD.selectIOFunc();
+ call TXD.selectIOFunc();
+ }
}
+ async command error_t UartByte.send(uint8_t byte)
+ {
+ /* FIXME: race with UartStream.send() */
+ atomic {
+ if (sobuf)
+ return FAIL;
+ while (call Registers.getStat(UCBUSY));
+ call Registers.setTxbuf(byte);
+ return SUCCESS;
+ }
+ }
- async command error_t UartStream.send( uint8_t* buf, uint16_t len )
+ async command error_t UartStream.send(uint8_t* buf, uint16_t len)
{
if (sobuf || !buf || !len)
return FAIL;
}
}
- async command error_t enableReceiveInterrupt()
+ async command error_t UartStream.enableReceiveInterrupt()
{
- if (!robuf)
- call Registers.clrIfgRx();
- call Registers.setIeRx();
- rxie = FALSE;
- return SUCCESS;
+ atomic {
+ if (!robuf)
+ call Registers.clrIfgRx();
+ call Registers.setIeRx();
+ rxie = FALSE;
+ return SUCCESS;
+ }
}
- async command error_t disableReceiveInterrupt()
+ async command error_t UartStream.disableReceiveInterrupt()
{
- if (!robuf) {
- call Registers.clrIeRx();
- call Registers.clrIfgRx();
- } else
- rxie = TRUE;
- return SUCCESS;
+ atomic {
+ if (!robuf) {
+ call Registers.clrIeRx();
+ call Registers.clrIfgRx();
+ } else
+ rxie = TRUE;
+ return SUCCESS;
+ }
}
- async command error_t receive(uint8_t* buf, uint16_t len)
+ async command error_t UartByte.receive(uint8_t* byte, uint8_t timeout)
{
- if (robuf || !buf || !len)
+ atomic {
+ uint16_t t;
+
+ /* FIXME: race with UartStream.receive() */
+ if (robuf || !byte)
+ return FAIL;
+ /* TODO: implement timeout, byte-time units. For now, 1-2 sec */
+ t = TBR;
+ while (t < TBR) {
+ if (call Registers.getIfgRx()) {
+ *byte = call Registers.getRxbuf();
+ return SUCCESS;
+ }
+ }
return FAIL;
- robuf = rbuf = buf;
- rolen = rlen = len;
- if (!call Registers.getIeRx) {
- call Registers.clrIfgRx();
- call Registers.setIeRx();
- rxie = TRUE;
- } else
- rxie = FALSE;
+ }
+ }
+
+ async command error_t UartStream.receive(uint8_t* buf, uint16_t len)
+ {
+ atomic {
+ if (robuf || !buf || !len)
+ return FAIL;
+ robuf = rbuf = buf;
+ rolen = rlen = len;
+ if (!call Registers.getIeRx()) {
+ call Registers.clrIfgRx();
+ call Registers.setIeRx();
+ rxie = TRUE;
+ } else
+ rxie = FALSE;
+ }
}
async event void Interrupts.rx(uint8_t byte)
{
- if (robuf) {
- /* receive() takes precedence if active */
- while (rlen && call Registers.getIfgRx()) {
- *rbuf = byte;
- if (--rlen)
- rbuf++;
- }
- if (rlen == 0 && robuf) {
- if (rxie) {
- call Registers.clrIeRx();
- call Registers.clrIfgRx();
+ atomic {
+ if (robuf) {
+ /* receive() takes precedence if active */
+ while (rlen && call Registers.getIfgRx()) {
+ *rbuf = byte;
+ if (--rlen)
+ rbuf++;
}
- robuf = 0;
- signal UartStream.receiveDone(robuf, rolen, SUCCESS);
- }
- } else
- signal UartStream.receivedByte(byte);
+ if (rlen == 0 && robuf) {
+ if (rxie) {
+ call Registers.clrIeRx();
+ call Registers.clrIfgRx();
+ }
+ robuf = 0;
+ signal UartStream.receiveDone(robuf, rolen, SUCCESS);
+ }
+ } else
+ signal UartStream.receivedByte(byte);
+ }
}
+
+ default async command const msp430_usci_uart_t* Configure.get()
+ {
+ const static msp430_usci_uart_t def = {
+ ctl0: UCMODE_0, /* async, lsb first, 8N1 */
+ ctl1: UCSWRST|UCSSEL_3, /* clock uart from SMCLK */
+ brx: UBRX_1MHZ_115200,
+ mctl: UMCTL_1MHZ_115200,
+ irtctl: 0,
+ irrctl: 0,
+ abctl: 0,
+ ren: USCI_REN_NONE
+ };
+
+ return &def;
+ }
+
+ async event void Interrupts.i2cStart() {}
+ async event void Interrupts.i2cStop() {}
+ async event void Interrupts.i2cCal() {}
+ async event void Interrupts.brk() {}
+ async event void Interrupts.i2cNak() {}
+ async event void Counter.overflow() {}
+
+ default async event void UartStream.sendDone( uint8_t* buf, uint16_t len,
+ error_t error ) {}
+ default async event void UartStream.receivedByte( uint8_t byte ) {}
+ default async event void UartStream.receiveDone( uint8_t* buf, uint16_t len,
+ error_t error ) {}
}
projects / tinyos-2.x.git / blobdiff