/*! \file command.c
\author Travis Goodspeed
- \brief These functions manage command interpretation.
+ \brief These functions manage command interpretation and timing.
*/
#include "command.h"
txstring(0xFF,0xFF,str);
}
+//! brief Debug a hex word string.
+void debughex(u16 v) {
+ debugbytes((void *)&v, 2);
+}
+
+//! brief Debug a hex word string.
+void debughex32(u32 v) {
+ debugbytes((void *)&v, 4);
+}
+
+/*! \brief Transmit debug bytes.
+
+ Transmits bytes for debugging.
+*/
+void debugbytes(const char *bytes, unsigned int len){
+ u16 i;
+ txhead(0xFF,0xFE,len);
+ for(i=0;i<len;i++)
+ serial_tx(bytes[i]);
+}
+
//! Transmit a header.
void txhead(unsigned char app,
unsigned long len){
serial_tx(app);
serial_tx(verb);
- //serial_tx(len);
+ //serial_tx(len); //old protocol
txword(len);
}
void txdata(unsigned char app,
unsigned char verb,
unsigned long len){
- unsigned int i=0;
+ unsigned long i=0;
if(silent)
return;
txhead(app,verb,len);
}
//Using TimerA might be cleaner.
}
+
+
+/* To better satisfy the somewhat odd timing requirements for
+ PIC33F/24H/24F ICSP programming, and for better control of GoodFET
+ timing more generally, here are a few delay routines that use Timer B.
+
+ Note that I wrote these referring only to the MSP430x2xx family
+ manual. Beware on MSP430x1xx chips. Further note that, assuming
+ some minor errors will be made, I try to err on the side of
+ delaying slightly longer than requested. */
+void prep_timer()
+{
+ #ifdef MSP430
+ BCSCTL2 = 0x00; /* In particular, use DCOCLK as SMCLK source with
+ divider 1. Hence, Timer B ticks with system
+ clock at 16 MHz. */
+
+ TBCTL = 0x0204; /* Driven by SMCLK; disable Timer B interrupts;
+ reset timer in case it was previously in use */
+ #else
+ #warning "prep_timer() unimplemented for this platform."
+ #endif
+}
+#if (platform != tilaunchpad)
+//! Delay for specified number of milliseconds (given 16 MHz clock)
+void delay_ms( unsigned int ms )
+{
+ #ifdef MSP430
+ // 16000 ticks = 1 ms
+ TBCTL |= 0x20; // Start timer!
+ while (ms--) {
+ while (TBR < 16000)
+ asm( "nop" );
+ TBCTL = 0x0224;
+ }
+ TBCTL = 0x0204; // Reset Timer B, till next time
+ #else
+ debugstr("delay_ms unimplemented");
+ #endif
+}
+
+//! Delay for specified number of microseconds (given 16 MHz clock)
+void delay_us( unsigned int us )
+{
+ #ifdef MSP430
+ // 16 ticks = 1 us
+ TBCTL |= 0x20; // Start timer!
+ while (us--) {
+ while (TBR < 16)
+ asm( "nop" );
+ TBCTL = 0x0224;
+ }
+ TBCTL = 0x0204; // Reset Timer B, till next time
+ #else
+ debugstr("delay_us unimplemented");
+ #endif
+}
+
+//! Delay for specified number of clock ticks (16 MHz clock implies 62.5 ns per tick).
+void delay_ticks( unsigned int num_ticks )
+{
+ #ifdef MSP430
+ TBCTL |= 0x20; // Start timer
+ while (TBR < num_ticks)
+ asm( "nop" );
+ TBCTL = 0x0204; // Reset Timer B, till next time
+ #else
+ debugstr("delay_ticks unimplemented");
+ #endif
+}
+#endif