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first - sorry for english mistake. i'm try to use SPI in master mode. i dont see any activity on relative pin. here my code ( i'm use KEIL uvison3) have someone some suggestion? thanks ---------------------- #include <LPC210x.H> unsigned long j,g; int main (void) { unsigned char pin; unsigned long i; PCONP = 0x3FE; IODIR = 0xff; // P0.0..7 defined as Outputs SPI_SPCCR = 8; // rate spi PINSEL0 = 0x5500; // enable spi i/o SPI_SPCR = 0x20; // master mode pin = 0; while (1) { for(i=0;i<8;i++){ if (pin) IOSET = 0x20; else IOCLR = 0x20; pin ^= 1; SPI_SPDR = 0x55;// i'm expect to see some activity } } } |
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lpc2106 - SPI - i need help
Started by ●December 11, 2003
Reply by ●December 11, 20032003-12-11
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--- In , "arturo_tramontini" <a.t@t...> wrote: > first - sorry for english mistake. > > i'm try to use SPI in master mode. > i dont see any activity on relative pin. > here my code ( i'm use KEIL uvison3) > have someone some suggestion? > > thanks > > ---------------------- > #include <LPC210x.H> > > unsigned long j,g; > > int main (void) { > > unsigned char pin; > unsigned long i; > > PCONP = 0x3FE; > > IODIR = 0xff; // P0.0..7 defined as Outputs > > SPI_SPCCR = 8; // rate spi > > PINSEL0 = 0x5500; // enable spi i/o > > SPI_SPCR = 0x20; // master mode > > pin = 0; > > while (1) { > > for(i=0;i<8;i++){ > > if (pin) IOSET = 0x20; else IOCLR = 0x20; > pin ^= 1; > // here i have put code for about 1 msec. delay // to allow the flow for spi > > SPI_SPDR = 0x55;// i'm expect to see some activity > > } > } > } |
Reply by ●December 11, 20032003-12-11
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If you are configuring the LPC to operate as SPI master you MUST select SSEL functionality on the apropriate pin and have HIGH level on this pin in order to act as a master. Richard --- In , "arturo_tramontini" <a.t@t...> wrote: > first - sorry for english mistake. > > i'm try to use SPI in master mode. > i dont see any activity on relative pin. > here my code ( i'm use KEIL uvison3) > have someone some suggestion? > > thanks > > ---------------------- > #include <LPC210x.H> > > unsigned long j,g; > > int main (void) { > > unsigned char pin; > unsigned long i; > > PCONP = 0x3FE; > > IODIR = 0xff; // P0.0..7 defined as Outputs > > SPI_SPCCR = 8; // rate spi > > PINSEL0 = 0x5500; // enable spi i/o > > SPI_SPCR = 0x20; // master mode > > pin = 0; > > while (1) { > > for(i=0;i<8;i++){ > > if (pin) IOSET = 0x20; else IOCLR = 0x20; > pin ^= 1; > SPI_SPDR = 0x55;// i'm expect to see some activity > > } > } > } |
Reply by ●December 11, 20032003-12-11
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If you are configuring the LPC to operate as SPI master you MUST select SSEL functionality on the apropriate pin and have HIGH level on this pin in order to act as a master. Richard --- In , "arturo_tramontini" <a.t@t...> wrote: > first - sorry for english mistake. > > i'm try to use SPI in master mode. > i dont see any activity on relative pin. > here my code ( i'm use KEIL uvison3) > have someone some suggestion? > > thanks > > ---------------------- > #include <LPC210x.H> > > unsigned long j,g; > > int main (void) { > > unsigned char pin; > unsigned long i; > > PCONP = 0x3FE; > > IODIR = 0xff; // P0.0..7 defined as Outputs > > SPI_SPCCR = 8; // rate spi > > PINSEL0 = 0x5500; // enable spi i/o > > SPI_SPCR = 0x20; // master mode > > pin = 0; > > while (1) { > > for(i=0;i<8;i++){ > > if (pin) IOSET = 0x20; else IOCLR = 0x20; > pin ^= 1; > SPI_SPDR = 0x55;// i'm expect to see some activity > > } > } > } |
