mirror of https://github.com/marqs85/ossc.git
76 lines
1.3 KiB
C
76 lines
1.3 KiB
C
#include <alt_types.h>
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#include <altera_avalon_pio_regs.h>
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#include <sys/alt_timestamp.h>
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#include <system.h>
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#include <io.h>
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#include "i2c_opencores.h"
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#include "spi_io.h"
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#include "av_controller.h"
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extern alt_u16 sys_ctrl;
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alt_u32 sd_timer_ts;
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void SPI_Init (void) {
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I2C_init(SD_SPI_BASE,ALT_CPU_FREQ,400000);
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}
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void SPI_W(const BYTE *wd, int len) {
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SPI_write(SD_SPI_BASE, wd, len);
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}
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void SPI_R(BYTE *rd, int len) {
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SPI_read(SD_SPI_BASE, rd, len);
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}
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void SPI_WW(BYTE d) {
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SPI_W(&d, 1);
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}
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BYTE SPI_RW (BYTE d) {
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BYTE w;
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SPI_R(&w, 1);
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return w;
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}
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void SPI_Release (void) {
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return;
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}
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inline void SPI_CS_Low (void) {
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sys_ctrl &= ~SD_SPI_SS_N;
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IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
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}
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inline void SPI_CS_High (void){
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sys_ctrl |= SD_SPI_SS_N;
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IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
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}
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inline void SPI_Freq_High (void) {
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I2C_init(SD_SPI_BASE,ALT_CPU_FREQ,ALT_CPU_FREQ/SCL_MIN_CLKDIV);
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}
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inline void SPI_Freq_Low (void) {
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I2C_init(SD_SPI_BASE,ALT_CPU_FREQ,400000);
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}
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int SPI_Timer_On (WORD ms) {
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if (!sd_timer_ts) {
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sd_timer_ts = ms*(ALT_CPU_FREQ/1000);
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alt_timestamp_start();
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return 0;
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}
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return 1;
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}
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inline BOOL SPI_Timer_Status (void) {
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return alt_timestamp() < sd_timer_ts;
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}
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inline void SPI_Timer_Off (void) {
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sd_timer_ts = 0;
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return;
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}
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