diff options
| author | (no author) <(no author)@6dc7ffe9-61d6-0310-9af1-9938baff3ed1> | 2006-09-10 14:15:41 +0000 |
|---|---|---|
| committer | (no author) <(no author)@6dc7ffe9-61d6-0310-9af1-9938baff3ed1> | 2006-09-10 14:15:41 +0000 |
| commit | fbc2ed57dd562c8ca2458becaeb17e78516adaa5 (patch) | |
| tree | f20142b3f1def8490aa73fdb3a1e397a873aa3e3 /openpcd | |
| parent | d3294d3cf32e649815c89f6e5759e39601b3ec4f (diff) | |
use SPI controllers internal timeout
git-svn-id: https://svn.openpcd.org:2342/trunk@171 6dc7ffe9-61d6-0310-9af1-9938baff3ed1
Diffstat (limited to 'openpcd')
| -rw-r--r-- | openpcd/firmware/src/openpcd.h | 6 | ||||
| -rw-r--r-- | openpcd/firmware/src/picc/poti.c | 23 |
2 files changed, 21 insertions, 8 deletions
diff --git a/openpcd/firmware/src/openpcd.h b/openpcd/firmware/src/openpcd.h index ab8dadf..0fdf9a1 100644 --- a/openpcd/firmware/src/openpcd.h +++ b/openpcd/firmware/src/openpcd.h @@ -104,13 +104,13 @@ * PA14 SPCK A O SPI Clock * PA15 PA15 P I PLL_LOCK * PA16 PA16 P O UDP_PUP (old) - * PA17 TD A O SSC Tx Data (MOD) + * PA17 TD A O SSC Tx Data (MOD) * * PA18 RD A I SSC Rx Data (SSC_DATA) * PA19 RK A I SSC Rx Clock (SSC_CLOCK) * PA20 PA20 P I AB_DETECT * PA21 PA21 P I N/C * PA22 PA22 P I N/C - * PA23 PWM0 B O PWM Output * (MOD) + * PA23 PWM0 B O PWM Output (MOD) * * PA24 PA24 P O PLL_INHIBIT * PA25 PA25 P O LED1 green * PA26 PA26 P O LED2 red @@ -124,7 +124,7 @@ #define OPENPICC_PIO_LOAD1 AT91C_PIO_PA2 #define OPENPICC_PIO_LOAD2 AT91C_PIO_PA3 -#define OPENPICC_PIO_SLAVE_RESET AT91C_PIO_PA5 +#define OPENPICC_PIO_nSLAVE_RESET AT91C_PIO_PA5 #define OPENPICC_PIO_BOOTLDR AT91C_PIO_PA6 #define OPENPICC_PIO_SS2_DT_THRESH AT91C_PIO_PA8 #define OPENPICC_PIO_SS1_GAIN AT91C_PIO_PA11 diff --git a/openpcd/firmware/src/picc/poti.c b/openpcd/firmware/src/picc/poti.c index 55691ba..0bd08b9 100644 --- a/openpcd/firmware/src/picc/poti.c +++ b/openpcd/firmware/src/picc/poti.c @@ -14,14 +14,22 @@ void poti_comp_carr(u_int8_t position) while (!(spi->SPI_SR & AT91C_SPI_TDRE)) { } AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, OPENPICC_PIO_SS2_DT_THRESH); - for (i = 0; i < 0xff; i++) { } + //for (i = 0; i < 0xff; i++) { } /* shift one left, since it is a seven-bit value written as 8 bit xfer */ - spi->SPI_TDR = position; + spi->SPI_TDR = position & 0x7f; while (!(spi->SPI_SR & AT91C_SPI_TDRE)) { } for (i = 0; i < 0xff; i++) { } AT91F_PIO_SetOutput(AT91C_BASE_PIOA, OPENPICC_PIO_SS2_DT_THRESH); } +void poti_reset(void) +{ + volatile int i; + AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, OPENPICC_PIO_nSLAVE_RESET); + for (i = 0; i < 0xff; i++) { } + AT91F_PIO_SetOutput(AT91C_BASE_PIOA, OPENPICC_PIO_nSLAVE_RESET); +} + void poti_init(void) { AT91F_SPI_CfgPMC(); @@ -30,6 +38,10 @@ void poti_init(void) AT91F_PIO_CfgOutput(AT91C_BASE_PIOA, OPENPICC_PIO_SS2_DT_THRESH); AT91F_PIO_SetOutput(AT91C_BASE_PIOA, OPENPICC_PIO_SS2_DT_THRESH); + + AT91F_PIO_CfgOutput(AT91C_BASE_PIOA, OPENPICC_PIO_nSLAVE_RESET); + poti_reset(); + #if 0 AT91F_AIC_ConfigureIt(AT91C_BASE_AIC, AT91C_ID_SPI, OPENPCD_IRQ_PRIO_SPI, @@ -38,8 +50,9 @@ void poti_init(void) #endif AT91F_SPI_CfgMode(spi, AT91C_SPI_MSTR | AT91C_SPI_PS_FIXED | AT91C_SPI_MODFDIS); - /* CPOL = 0, NCPHA = 1, CSAAT = 0, BITS = 0000, SCBR = 12 (4MHz), - * DLYBS = 0, DLYBCT = 0 */ - AT91F_SPI_CfgCs(spi, 0, AT91C_SPI_BITS_8 | AT91C_SPI_NCPHA | (24<<8)); + /* CPOL = 0, NCPHA = 1, CSAAT = 0, BITS = 0000, SCBR = 13 (3.69MHz), + * DLYBS = 6 (125nS), DLYBCT = 0 */ + AT91F_SPI_CfgCs(spi, 0, AT91C_SPI_BITS_8 | AT91C_SPI_NCPHA | + (13 << 8) | (6 << 16)); AT91F_SPI_Enable(spi); } |